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Euroheat & PowerRecommendation

for

Education, Training and Examination of Fitter and PE-welder
and

Certification of Fitter Companies

Approved by the Euroheat & Power Board Prepared by Task Force Transport & Distribution June 2010

Contents
1. 2. Annex A1 A 1.1 A 1.2 A 1.2.1 A 1.2.2 A 1.3 A 1.3.1 A 1.4 A2 A 2.1 A 2.2 A 2.2.1 A 2.2.2 A 2.2.3 A 2.2.4 A 2.2.5 A 2.2.6 A 2.2.7 A 2.3 A 2.3.1 A 2.3.2 A 2.3.3 A 2.3.4 A 2.3.5 A 2.3.6 A 2.3.7 A 2.4 A 2.4.1 A 2.4.2 A 2.4.3 A3 A 3.1 A 3.2 A 3.2.1 A 3.2.2 A 3.2.3 A 3.3 A 3.3.1 A 3.3.2 A 3.3.3 A 3.4 A 3.4.1 Introduction ....................................................................................................... 3 Recommendation EHP...................................................................................... 9 Qualification of fitters and PE welders as well as certification of fitter companies in different countries ....................................................................10 Finland ..............................................................................................................10 Qualification and certification scheme for companies and fitters........................ 10 Requirements for fitter certificate....................................................................... 10 Validity of the certificate .....................................................................................10 Training of fitters and PE welders.......................................................................11 Requirements for fitter company certificate ....................................................... 11 Validity of the certificate .....................................................................................12 On-site quality control........................................................................................ 12 Germany / Austria ............................................................................................12 Training of fitters and PE welders...................................................................... 12 Exam of fitters according to AGFW worksheet FW 603 ..................................... 13 Test Centre ........................................................................................................14 Admission to Exams...........................................................................................14 Theoretical Exam ...............................................................................................14 Practical Exam ...................................................................................................15 Overall Rating ....................................................................................................16 Period of validity and repetition of exam .............................................................17 Technical Rules..................................................................................................17 Exam of PE welders according to DVS 2212-4.................................................. 17 Test Centre ........................................................................................................17 Admission to Exam ............................................................................................17 Theoretical Exam ...............................................................................................18 Practical Exam ...................................................................................................18 Overall assessment............................................................................................19 Validity ...............................................................................................................20 Technical Rules..................................................................................................20 Certification of fitter companies ......................................................................... 20 Requirements for enterprises and content of examination..................................20 Review and Certification.....................................................................................22 Technical Rules..................................................................................................22 Sweden .............................................................................................................23 Area of validity for ficensing of fitters and authorisation of fitter companies ....... 23 Authorisation committee 23 Composition of the authorisation committee.......................................................23 Committee‘s decision method ............................................................................23 Business of the authorisation committee ............................................................23 Licensing of fitters ............................................................................................. 24 Requirements.....................................................................................................24 Charges for Iicensing .........................................................................................24 Obligations for suppliers of joint systems............................................................25 Authorisation of fitter companies ....................................................................... 25 Requirements.....................................................................................................27
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.............. Damage caused by improper construction lead to moisture in the insulation and on the long-term to corrosion of the steel pipes....Steel valve assembly for steel service pipes..........................6 Charges ... constructed by using underground plastic jacket pipes.......Surveillance systems EN 448 EN 488 EN 489 EN 13941 EN 14419 EN 15698-1 District heating pipes ............28 Identification and marking of joints ........ regarding the minimum inspection scope of pipes (EN 253) and fittings (EN 448).........Pipe assembly of steel service pipe.................... gives instructions for the welding of medium pipes..Preinsulated bonded pipe systems for directly buried hot water networks ..... Note: For plastic jacket pipe-system components.. polyurethane thermal insulation and outer casing of polyethylene Design and installation of preinsulated bonded pipe systems for district heating District heating pipes ...Preinsulated bonded pipe systems for directly buried hot water networks ................ 28 1....Joint assembly for steel service pipes.. Plastic jacket pipes are assembled onsite from pipes and fittings and other system components... Page 3 ..........Fitting assemblies of steel service pipes.... A plastic jacket pipe connection is the establishment of the connection between the adjacent tubes and / or fittings. provides information on the examination of the onsite produced and pipe joints and provides recommendations for the training of fitters...... polyurethane thermal insulation and outer casing of polyethylene District heating pipes ...........Part 1: Twin pipe assembly of steel service pipe...5 A 3.A 3........... following Standard shall apply: EN 253 District heating pipes ................. polyurethane thermal insulation and outer casing of polyethylene District heating pipes ...... see Figure 1........ 28 Regulations .............Preinsulated bonded twin pipe systems for directly buried hot water networks . their static pipe design and the assembly. polyurethane thermal insulation and outer casing of polyethylene Based on EHP/001 Certification Guidelines for quality assessment of district heating pipes the production sites of manufacturers can be reviewed and certified..2 A 3...4................Preinsulated bonded pipe systems for directly buried hot water networks ..............Preinsulated bonded pipe systems for directly buried hot water networks .... polyurethane thermal insulation and outer casing of polyethylene District heating pipes ................ Introduction The quality of the joint casing application is crucial for the useful life and efficiency of district heating networks........................Preinsulated bonded pipe systems for directly buried hot water networks ... Note: EN 489 sets out requirements for pipe joints and type tests for joints.

Page 4 . Inadequate implementation qualities may require repair work or even cause an interruption in the heat supply. junction structures.) The insulation of the sleeve cavity. see Figure 2. The supplementary insulation and sealing / connection of the PE casing pipe has to be performed by fitters and PE welders. The attachment of expansion cushion. The welding is performed by steel welders with a valid test certificate according to EN 287-1.Figure 1: Example of a pipe connection between two plastic jacket pipes (Source: Canusa-CPS) The steel medium pipes are welded to each other or to the steel fittings. Their field of activity includes The installation of the monitoring and fault detection systems (if any) The sealing of the sleeve area or the connecting of the coated pipes. Considerable expenditures are necessary to restore the required conditions of underground district heating pipes. Long-term statistics show that a large part of the damages can be traced back to poor performance qualities in the context of the joint casing application. etc. The assembly of special moldings of coated pipes (segment bends.

joint casing systems. Figure 3: Damage development of plastic jacket pipes without damages by third parties in Germany (Source: AGFW) Page 5 . see Figure 3. the damages of plastic jacket pipes. in particular during construction.Figure 2: Breakdown of the causes of damage in Germany (Source: AGFW) Through improving the skills and knowledge of fitters and companies active in this field. were significantly reduced within the past decade in Germany.and PE-X. Another reason for the reduction of damages is today's safer and easier to handle PE.

is significantly influenced by the following factors: . must be part of the manufacturer's documentation and delivered together with the components of the casing pipe connection. that are essential for the quality of the jacket pipe joints and for the reaching of the expected service life.Coordination of appointments with the construction ." Page 6 .Processing instructions of the joint manufacturer The processing instructions. tent) .The quality of pipe connections .Training and testing of fitters . These have to mention at least the following topics: Working conditions The appropriate procedure for creating the best working conditions on the ground have to be established. Cleaning Appropriate procedures for cleaning and drying must be defined for: o The entire section of a pipe connection between the pipes o The front of both welded together pipe components o The surface of the steel medium pipes o The surface of the insulation o The surface of the connection joint o The surface of the sheating o The sealing surfaces of the material used to coat the joint system pipe (connecting pipe sleeve and jacket pipe) o The wetting surfaces of the insulation of the sleeve cavity.Workplaces and working conditions in the area of the joint casing according to the requirements of technical regulations Pipe trenches according to safety requirements with sufficient space Sufficient space around the tubes for the manufacture of the connecting and sealing of the jacket pipes Dry pipe trench (drainage) Protection against adverse weather conditions (umbrella.Use of joint systems and materials according to EN 489 . The instructions must contain the following sentence: "All wet foam must be to be removed from the pipe ends. equipment and machinery effective quality control at the construction site .Qualification of fitter companies functional organization adequate financial basis experienced and professionally qualified management personnel certified fitters and PE welders appropriate and serviceable tools.and thus the damage caused by improper joint casing application .

Adequate reimbursement for installation and assembly work . at which the PUR heat insulation may be stored when the temperature is outside the range of 15 °C to 25 °C. Thermal insulation of the jacket pipe joint Appropriate procedures for the onsite foaming or for the installation of prefabricated insulation elements have to be described. This determination shall comply with EN 14419 and include procedures for at least the following: o reviewing the measuring elements after delivery o assembling works in jacket pipe connections to ensure the functioning of the system o examination of the assembly quality of the monitoring system during the installation o examination after the completion of a measuring section Onsite steel welding Appropriate procedures for the welding of steel pipes have to be established.Monitoring In case monitoring system are installed in jacket pipe connection. o temperatures. Joint Connection Appropriate instructions for handling and installation of the joint connection must be established. These measures shall at least include "welding procedures” and “welding preparation and orientation". For the foaming at the construction site at least the following methods have to be described: o Measures to be taken. Scarping) Pipeline construction Joint casing application and fitters Page 7 . o assembly procedures to prevent gaps between the insulation of the jacket pipe joints and the pipe ends. o measures to be taken to ensure that during the foaming of the joint the air can escape optimally and no excessive losses of the foam occur.Appropriate monitoring of the construction work according to technical specifications and by professional supervisors Construction site organization Construction timing specifications Excavation of the pipe trench (Sheeting. For the installation of prefabricated insulation elements at least the following procedures have to be described: o storage procedures. . Type-specific methods for testing the tightness of the jacket pipe joints must be described. suitable methods for connecting the monitoring system should be established before the start of the joint assembly. in order to avoid damage of the insulation elements and to keep them dry. if the surface temperatures is outside the range of 15 °C to 45 °C.

Annex C and reserve sufficient time for practical exercises with connection methods.PE-welder must possess a proof of a valid qualification. applicable safety precautions. Training and inspection contents are indicated in EN 489. as well as supervising personnel must possess theoretical knowledge and practical skills in relation to the following areas: . The processing of jacked pipe joints under construction site conditions should be a part of the training.In order to ensure the necessary high-quality joint casing application.quality inspection and documentation. such as technical colleges. .provisions for the processing and handling of materials. The training programs should include the disciplines and subjects mentioned in EN 489:2003. A qualification certificate is the prove of the received training and skills.every single step in the processing of the application of the joint casing system must be according to the instructions of the manufacturer. . in which their ability to conduct reproducible welds in the specified quality is confirmed.those persons. The required training programs may be carried out by manufacturers. suppliers or other competent organizations. Annex C. .quality and error criteria. According to EN 489 . Fitters that connect prefabricated insulated jacket pipe systems.procedure of thermal insulation. . . that connect pre fabricated plastic jacket pipe components posses a valid qualification. . insulation techniques and the installation of surveillance systems. Page 8 . .the materials used.accident protection. which confirms that they received an appropriate training for the utilized medium pipe connection and pipe system. . .used joint system. fitters have to have sufficient technical knowledge and manual skills regarding the utilized joint systems.installation of the monitoring system. to ensure that the connection of the jacket pipe has the same quality as the one of the type testing.

Note: In Austria. Fitter companies shall be certificated and authorized. the certification of fitters and PE welders is not further defined. The fitters and PE welders must repeatedly prove their knowledge and skills at appropriate intervals.requirements regarding the quality of a construction can only be ensured by such professionals that . Finland. The valid qualification has to be confirmed at the construction site through a personalized certificate. Recommendation EHP The quality of the joint casing application depends largely on the skills. can be in charge of certification. In EN 489:2009. by which the fitter can be identified. Germany and Sweden the national District Heating association ensures the implementation and quality of the certification process (see also the examples in the following Annexes).regular conduct joint casing application. The contractually agreed and technically specified . knowledge and quality awareness of the fitters.have sufficient specialized knowledge. The comparability of qualifications at European level is not possible. The implementation is subject to the concerned interest groups or individual countries.in particular EN 489 .2. Another possibility is to base the certification process and education on the producer of the joint system. EHP recommends: For assembly work of plastic jacket pipes only certified and therefore trained and tested fitters and PE welders are appointed. . Page 9 . Fitter and PE welder shall be registered. Their training and certification should be organized and implement at the national level. . Authorised companies shall equip each joint with a label containing the name of the company and a serial joint number. Instead of District Heating associations other bodies such as technical universities. institutes etc.master the necessary manual skills.

heat shrinking…) A 1. More information on a particular approach can be obtained from the national District Heating associations. and this is nowadays common practise in Finland. A 1.: +358 9 5305 2303. flame cutting. the fitter shall make a test installation as condition for certificate renewal. after that a new 3-day course with exams is required. or the verification / certification of fitter companies are regulated in the respective country. a district heating company.Licence for so called ”hot installations” (welding. The certificates can cover heat shrinkable joint installation and insulation or PEwelding of casings or both of them. Finnish Energy Industries keeps lists of certified companies and fitters updated on its web site. Certification is naturally voluntary for companies and fitters. There is a common Certification Board managing and operating the scheme. A1 Contact to: Finland Finnish Energy Industries PO Box 100 FI-00101 HELSINKI Veli-Pekka Sirola.1 Validity of the certificate The certificate is valid for one year at a time.A 3-day course on joint installation and/or PE-welding with passed theoretical exams and practical tests . that the fitter has performed joint installations and/or PE-welding during the past year).2 Requirements for fitter certificate General requirements for a fitter certificate are: . Tel.fi A 1. Renewal by test installation is possible maximum two times.2. The certification process is regulated in a special document describing the requirements and the procedures of certification. If this is not the case.sirola@energia.Annex Qualification of fitters and PE welders as well as certification of fitter companies in different countries (informative) The following outlined procedures of individual countries show how training and the testing of fitters and PE-welders. Finnish Energy Industries and Finnish Plastics Industries. ensure the capacity of fitter companies and sufficient knowledge and skills of fitters and hence quality of joint installations. Page 10 . It is reissued annually by written evidence of fitter’s work experience during past year (evidence from e. Welded casing joints are not covered as they mostly are company-specific and thus certification of fitters of welded joints should be borne by the producer. Mailto: veli-pekka. The scheme that was started about 20 years ago covers certification of both fitter companies and fitters. The scheme is organised and operated in cooperation by two associations. Finnish Energy Industries recommends energy companies to use only certified companies and fitters for pipe installation in their projects.g. The goal of the scheme is to advance sound competition.1 Qualification and certification scheme for companies and fitters In Finland there is a national qualification scheme for fitter companies and fitters.

when new joint systems are put on the market).plastic materials. The education and training is carried out by one education and training centre for the whole country.supervision. A 1.welding machines and devices . Contents of the course on joint installation: . as surveillance systems are not commonly used in Finland) . A 1.practical training .The company is registered in Register of Companies .work safety in joint installations . bends.g.joint technologies . not included in exams.2.surveillance systems and alarm wire joints (just a lecture. either covering both joint installation and PE-welding or one of them. t-pieces.welding preparations .welding parameters and controls .welding methods . properties and identification .theoretical exam and practical tests Joint producers should evaluate if additional training and/or additional certification by the producer for their specific joint systems is needed (e.inspection and evaluation of practical test installation .general about DH pipes and networks . tests and inspections of joint installations .theoretical and practical exams Contents of the course on PE-welding of casings: . repairs) .There are no additional requirements for repetition of the course and exams e.installation of joints . at certain intervals.3 Requirements for fitter company certificate General requirements for a fitter company certificate are: .materials .practical training (pipes.2 Training of fitters and PE welders There is a 3-day course on heat shrinkable joint installation and insulation and a separate 3day course on PE-welding of casings with theoretical exams and practical tests.g.The company has sufficient technical and economical capacities Page 11 . This makes it easier to manage the system and ensures that the contents and implementation of the education and training and exams is the same for all.filler materials . These courses are obligatory for fitters wishing to receive a fitter certificate.

de A 2.companies that provide joint casing application services . On-site control is linked to the certification so that significant and repeated defects in installation quality communicated to the Certification Board may lead to: . see Figure 4 and Figure 5.technical colleges The training at technical colleges for fitter and PE welder lasts five days. It is up to the district heating company to require.1 Validity of the certificate The certificate is valid for one year at a time. Page 12 . A 1.limitation of the scope of certificate . V.reneval of the 3-day course with exam and test . Mailto: r. as well as the contents of the AGFW worksheet FW 401 should be the subject of the training. Part of on-site control is making sure that all fitters carrying out jointing of pipes are certified.: +49 69 6304-346. The content specified in EN 489.The company has a valid liability insurance All fitters of a company should be certified.remark . but does not mean that on-site quality control is not needed anymore.besier@agfw..public notice (to be communicated to DH companies) . It is reissued annually by written evidence that the requirements described above are still fulfilled.4 On-site quality control Certification of fitter companies and fitters ensures the necessary preconditions and qualifications for a good quality joint installation are there.3.The company employs a full-time foreman/leading fitter responsible for the installation work quality with at least one year experience as a foreman or three years as a fitter and a passed 3-day course on joint installation .withdraval of certificate of fitter or fitter and company. take care and control that all fitters carrying out joint installation or PEwelding in their projects are certified. not just one. Kälte und KWK e.The company employs at least one permanent fitter with a fitter certificate . It is also recommended for DH companies to take care that fitters of every joint in the field will be documented and marked on the joint. On-site control is responsibility of DH companies. A 1. Tel. The training must provide sufficient time for practical exercises. Stresemannallee 28 D-60596 Frankfurt/Main Rolf Besier. It includes the exam for fitter according to AGFW worksheet FW 603 and the exam for PE welders according to DVS Directive 2212-4.1 Training of fitters and PE welders The training is carried out by . A2 Contact to: Germany / Austria AGFW | Der Energieeffizienzverband für Wärme.

Contents of the exam are . Page 13 . .Guideline DVS 2284 sets the contents and scope of the training for PE-welder. It is divided into 14 lessons of specific theory and professional practice with 22 teaching units. .Preparation for joint casing application . see Figure 6.2 Exam of fitters according to AGFW worksheet FW 603 The AGFW worksheet FW 603 specifies the technical and practical exam of fitters.Testing of the joint system for leakages prior to the insulation by means of air pressure. . It is the basis for the initial exam and the repeated tests.Assembly and testing of the monitoring and error tracking system.Processing of permanent sealings of the entire joint system (PE-shrink sleeve with hotmelt adhesive and PE-X-Shrink bands).Preparation of the joint system for processing and sealing. Figure 4: Specialized Training (Source: SKZ) Figure 5: Exercises for testing the manual skills fitters according to AGFW worksheet FW 603 (Source: SKZ) Figure 6: Exercises for testing the manual skills of PE welders according to DVS 2212-4 (Source: SKZ) A 2.

Note: As the exam has to be carried out by the fitters with their own equipment and machinery. the technical equipment of the test center may also be used. Note: In the practical exam only one joint system can be examined.Occupational Safety Securing the work area Personal protection equipment Execution of pipe trenches Storage. This has to be provided by the fitter to be tested.Requirements for joint casing application Page 14 .2. It includes amongst other safety goggles. In case of defects they may not be used. if through their training and previous work it can be expected that they have sufficient technical knowledge and skills in order to pass the exam. one member of the examination board must be an examiners appointed by AGFW. non-destructive testing of the quality of the joint casing applicatio . carried out by the fitter that is tested.Insulation of sleeve cavity with polyurethane foam. A 2. In case of doubt. These must be in a technically flawless security condition. When successfully passing a test on the sample.2. gloves. safety shoes. If the exam is in a direct connection to an educational program. Through the composition of the examination board it has to be ensured that all the content of the exam are covered. the test center can request an approval test. recognized by the AGFW worksheet FW-604. the exam is not only a purely personal examination but also in some sense a procedural examination. The practical exam has to be performed by the fitter with its own tools. The practical test may only be performed using the necessary personal protection equipment. This is usually the case if a person has at least one year experience as assistant fitter and sufficient knowledge of the materials and processes on the basis of the relevant technical regulations.. Repeated tests have in any case be carried out with the equipment of the respective fitter.1 Test Centre The exam may only provided by manufacturers and technical schools. . The practical work has to be certified by the companies. Subjects of the theoretical exam are: . it can be assumed that the fitter is also able to work with other professional systems. . This approach aims to ensure that the fitters and their companies are equipped with appropriately. A 2. equipment and machinery.2 Admission to Exams Persons may participate at the initial tests.2. -jacket and -helmet. If the exam is performed by manufacturers. The exam has to take place in front of examination board.Sealing of the foaming holes with PEwelding plugs (procedure heated plate welding) . work pants.Final. transport and processing of chemicals and flammable / explosive substances equipment and tools etc. A 2.3 Theoretical Exam In the theoretical exam of joint casing application the necessary expertise in the practical work rules and safety measures have to be demonstrated.

Testing of the tightness of the joint system before insulation through air pressure .Preparation of a polyurethane foam sample .Sealing the foaming holes with welding plugs .Testing by the fitter The exam is carried out within 45 minutes by a written multiple-choice test. It is mandatory to pass the theoretical exam before the practical exam.Sealing the foaming holes with welding plugs . Practical Exam In the practical exam the fitters have to demonstrate their manual skills.Processing and sealing of joint systems with permanently melt adhesives .Sleeve cavity insulation with polyurethane foam .Preparation of joint casing application .4 Subjects are: .Conditions of work and surrounding Applied systems and products Used tools and equipment . A 2.Testing of the tightness of the joint system before insulation . The position of the test sample has to be unchanged during the exam.2.Testing by the fitter The test sample shown in Figure 7 has to be attached during the exam on the floor in a similar way as at the construction site.Assembly and testing of the plastic jacket pipes-monitoring and fault detection systems .Preparation of a polyurethane foam sample . The level of support from the floor to the bottom of the medium pipe must not exceed 20 cm. The weighting factors 1-3 take into account the practical importance of the joint casing application.Preparation of joint casing application .Assembly and testing of the plastic jacket pipes-monitoring and fault detection systems . There are 30 weighted questions. The theoretical exam is considered passed if at least 75% of possible points are achieved.Preparation of the sealing surfaces .Processing and sealing of joint systems with permanently melt adhesives . The repetition of the exam on the same day is not allowed.Preparation of the sealing surfaces . Page 15 .Sleeve cavity insulation with polyurethane foam .

5 Overall Rating To pass the exam as a fitter both the theoretical exam and the practical exam have to be successfully passed. The repeated exam should be accompanied by adequate practical and theoretical training. A failed test can be repeated. A 2. The ID must be readable under construction site conditions during the period of validity. see Figure 8. undergo a visual inspection and mechanical-technological tests.2. To demonstrate the successfully passed exam the fitters receive of an exam certificate and an ID. This ID mentions the name of the fitter and validity of the qualifications specified.Figure 7: Test sample for exam according to AGFW worksheet FW 603 The individual work steps and the final test sample as well as the sample taken from the test sample by the examiners. Figure 8: ID of fitters according to AGFW-Worksheet FW 603 (Source: SKZ) Page 16 . The practical test is passed if the requirements on the test sample and the taken sample in the visual assessment and the mechanical-technological tests are met. The repetition of the practical exam on the same day is not allowed.

2007 . The directive does not apply to other PE-welding techniques such as heated plate welding or sleeve welding with incorporated electric heating elements. edition 12.3. This provides the permission for welding with the procedures hot gas string bead welding and hot gas extrusion welding.2007 Joint casing application on preinsulated bonded pipes and flexible pipes.AGFW worksheet FW 603. subgroup I-5 and II-1 may participate in the exam and only if from their training and previous work it can be expected that they posses sufficient technical knowledge and skills to pass the exam. A 2. The guideline DVS 2212-4 is the basis for the initial exam and repetition of the exam on the correct and professional execution of PE welding procedures such as hot gas string bead welding and hot gas extrusion welding at construction sites on plastic jacket pipes. If the exam takes place at the end of a preparatory course for the exam for example according to DVS 2284. examination of fitters .Rules of procedures for examination of fitters work sheet according to FW 603.AGFW worksheet FW 604.3. and the assessment of joint mechanics after FW 603.Conditions for recognition of testing centers according to FW 604. This is usually the case when one of the following conditions is met: Page 17 . The repetition of the exam is always necessary if the fitter has interrupted his activity for longer than 6 months.2007 Joint casing on preinsulated bonded pipes and flexible pipes. The repletion of the exam may be integrated in an additional training session. edition 12. The test center must have the necessary facilities to carry out the tests. edition 12.2.Qualification criteria for recognition as an examiner AGFW FW-603 and as examiners AGFW FW 604.6 Period of validity and repetition of exam The validity of the exam is two years.2007 .2 Admission to Exam Only welder who passed the exam on plastic welding according to guideline DVS 2212-1.2007 A 2. A 2.1 Test Centre The exam is carried out in a test center and supervised by an examiner for plastic welders. edition 12. acknowledgment from inspection stations to the examination from fitters of work sheet FW 603 . A 2. an exam as a PE welder according to DVS 2212-4 has to be passed if PE-welded joints have to be applied on the jacket tubes.A 2. the trainer and evaluator may be no identical for any candidates.2007 .7 Technical Rules . edition 12. For these techniques complementary trainings or exams have to be carried out by the manufacturer.3 Exam of PE welders according to DVS 2212-4 In addition to the exam as a fitter according to AGFW worksheet FW 603.Rules of procedure for acknowledgment of inspection stations according to work sheet FW 604. edition 12.2.

The test includes the following subjects: .Welding Specificities of the procedures hot gas string bead welding and hot gas welding by extrusion of filler material on plastic jacket pipes Requirements for basic and welding consumables. The theoretical exam shall be considered passed if at least 66% of possible points are achieved. e.. g. In case of doubt. g.Thermoplastics Denomination Strength characteristics Influence of temperature Quality and condition of the semi finished product as well as welding consumables .3. . A 2.. subgroup I-5 and II-1. in the context of a repeated exam at least 15 questions have to be answered. sufficient experience in the processing of semi-finished products made of thermoplastic materials with the welding procedures hot gas string bead welding and hot gas welding by extrusion of filler material and successful participation in the course of preparation for the welding test in accordance with DVS 2284 .. skilled worker or journeyman in a relevant profession) and successful participation in a basic course on the processing of semi-finished products made of thermoplastics the course to prepare for the exam as plastic welder according to DVS 2284.3. Page 18 . The training and practical work have to be demonstrate by certificates.Technical training (e.At least one year experience as a plastic welder and a satisfactory knowledge of the materials and processes involved.Technical training (e.4 Practical Exam In the practical exam. execution qualities Welding parameters Weld preperation Implementation of welding procedures Welding Minutes Occupational safety A written multiple-choice serves as the basis. the PE welder has to prepare a test sample and provide for each weld seam a welding protocol. A 2. In this case. As part of the initial exam at least 30 questions. the test center can perform an approval test. equipment. i. as well as according to DVS 2212-4 may be held consecutively. the theoretical l exam has to be passed just once. the exam for both may be held on one day. The exams according to DVS 2212-1.3 Theoretical Exam In the theoretical exam the welder has to demonstrate that he possesses the required working knowledge and understanding of safety measures for an accident-free and professional work. skilled worker or journeyman in a relevant profession).

A 2.3. Figure 10: ID of PE welder according to DVS 2212-4 (Source: SKZ) Page 19 .5 Overall assessment To pass the exam as a PE welder both the theoretical exam and the practical exam have to be successfully passed.The equipment to be used and machinery must be in a technically flawless security condition. A failed test can be repeated. The repeated exam should be accompanied by adequate practical and theoretical training. the test sample has to be fixed in a similar location. above the floor. To demonstrate the successfully passed exam the fitters receive of an exam certificate and an ID. Figure 9: Test sample for the exam as PE welders according to guideline DVS 2212-4 The test sample has to be inspected visually during and after manufacturing. Thereafter. or those of the test center. see Figure 10. The ID must be readable under construction site conditions during the period of validity. During the weld preparation and the welding process. This ID mentions the name of the fitter and validity of the qualifications specified. samples for further tests including visual quality of the weld and for subsequent mechanicaltechnological tests have to be taken. The welder can decide whether to use his own tools and machines (or from his employers). The branch pipe has to lean 45 ° from the vertical. The height of the free supports affixed on the steel medium pipe may at most be 200 mm. from the floor to the under edge of the steel medium pipe. as on the construction site.

can demonstrate . Therefore one for the PE welders produced weld . A 2. A three-year practice of joint casing application and experience in the management of corresponding constructions have to be demonstrated. Page 20 . which are commercially related to the execution of published services and can demonstrate their qualification. The validity of the welder exam may be prolonged by a test centre for two years. The contracting authority must ensure . edition 9. preparation for the welding test in accordance with guideline DVS 2212-4 Certification of fitter companies A 2.and.possibly out of a difficult working position must be checked at a unforeseen time. A retest is always due necessary if the welder has interrupted his work for longer than six months. A 2. Qualified companies are those. The requirements and the procedure of the certification process are regulated in the AGFW worksheet FW 605.3.7 Technical Rules DVS 2212-1 Exam of PE welders.6 Validity The welder must annually repeat the exam. PE welders .plastic jacket pipes. edition 9. welding of plastic jacket pipes – pipes and pipe parts DVS 2284. where appropriate. through a working sample the manual skill and quality are demonstrated. if at the expiry of the ID.A 2. This also applies to the assembly of plastic jacket pipes. test group I and II DVS 2212-4.1 Requirements for enterprises and content of examination Formal Requirements Control of documents Organization The management of the company must ensure that the responsibilities and authority within the organization are established and publicized.2004 DVS-course.2004 Exam of PE welders. They have to prove knowledge of joint casing application with the peculiarities that arise from the processing of materials and work techniques. This applies for the following employees: o The responsible professional o The quality officer The responsible professional and the quality officer must be employed by the company.4.4 Regulations claim that joint casing application has to be performed by qualified companies.3.that only suitably qualified companies and institutes perform these activities. o the leading fitter of the construction site The leading fitter of the construction site has to proof his qualification according to FW 603 and DVS 2212-4 o employees of individual sites and branch offices or business offices.

the company has to ensure that confusion is avoided.at least twice a year.. The documentation of the tests must be clear and comprehensible. qualifications. The current processing instruction for the respective sleeve systems and materials used on the construction site must be available at all times. for which only special tools. etc. The company has to o cover the need for necessary training and instruction of the professionals.professionals that conduct activities affecting the quality of the product must have the ability and experience to be able to carry out their tasks. Additional supporting joint casing application staff and / or personnel undergoing training may only work under the constant supervision and instruction of the leading fitter of the construction site. o ensure the validity of certificates. The equipment shall meet the relevant safety requirements in accordance with the rules and regulations regarding work safety and health standards and correspond to the "state of the technical rules".Evidence of activity and references The company or the responsible person has to submit evidence of past lessons learned and executed work. . The quality officer has to check through visual tests the condition of the technical equipment. o appoint for each construction site a leading fitter of the construction site and qualified personnel in sufficient number. . including references.Equipment For executing their work.Quality Assurance The quality officers of the company has to test the fitters at the construction sites in regular intervals . The company has to set measurements how to deal with the results of the quality checks.Implementation of the joint casing application It must be ensured that the materials and auxiliary materials required for the joint casing application are properly transported. If different sleeve materials or systems are processed. The qualification for the processing of producer-specific sleeve systems with the appropriate equipment and machinery has to be demonstrated by an additional proof of the manufacturer (procedure for sleeve welding with incorporated electric heating elements). equipment. as well as the test results. For example how necessary improvement or corrective action can be quickly implemented. o provide prove for the proper disposal of waste or residual materials . machinery or test equipment are used. Page 21 . The onsite responsible fitters have to demonstrate their qualification with exams in accordance with valid FW 603 and possibly DVS 2212-4. stored and processed according to the manufacturer. based on appropriate education and training. o ensure the compliance with the requirements if using external professionals and / or subcontractors. identifying the construction site. . companies need to use the required equipment in operational condition in sufficient quantities. the weather and construction site condition and the extent and nature of the tests.

2003 Joint casing application on preinsulated bounded pipes on flexible pipes.Guidelines to AGFW/FVGW-worksheet FW 605 FW605. see Figure 11 and Figure 12.Reports of independent.2003 .3 Technical Rules . receive a certificate and can use the certification for promotion on the company vehicles. A 2. external audit bodies on the implementation quality have to be submitted upon request of the customer. requirements for companies which carry out joint casing application .4.L4.2003 Comparative overview of existing management systems and qualifications Page 22 .L3. Edition 9. Edition 9.L1.2003 .Application forms for certification according to AGFW/FVGW-worksheet FW 605 for companies which carry out joint casing application . Edition 9.Business rules to AGFW/FVGW-worksheet FW 605. The companies that have been successfully tested.und FVGW-Experts FW 605 FW605.AGFW-Worksheet FW 605. It must be ensured that these are not older than one year. Edition 9.2003 Principles of cooperation between AGFW / FVGW and certification bodies FW605.2 Review and Certification The inspections and certifications are carried out by certification bodies accredited according to EN ISO / IEC 17021. in their scope the certification process has to be implemented according to AGFW worksheet FW 605.2003 Qualification requirements for AGFW.4. Edition 9. Edition 9. Figure 11: Model of certificate according to AGFW worksheet FW 605 for joint casing application Figure 12: Advertising of a qualified fitter company on a company vehicles A 2.

3 Business of the authorisation committee The authorisation committee has the task. Neither may information that comes to light during the processing of cases by the committee be disclosed to outsiders.se A 3.2 A 3. after examination according to the ordinances and regulations for authorisation and licensing. A 3. Secretary and convener appointed by Svensk Fjärrvärme. The committee‘s ordinances may only be changed through a decision by the superordinate Svensk Fjärrvärme‘s Technical Council. Members are appointed for a term of office comprising three calendar years.2.1 Authorisation committee Composition of the authorisation committee Members of the committee are to be appointed by Svensk Fjärrvärme (Swedish District Heating Association) and manufacturing company each with one member and a third appointed jointly by the first two. Cases against the committee‘s decision are appealed to Svensk Fjärrvärme´s Technical Council.nordenswan@svenskfjarrvarme. Committee minutes and other documents are not to be made available to parties other than those working on the committee.2006 Conformity assessment – Requirements for bodies providing audit and certification of management systems A3 Contact to: Sweden Svenska Fjärrvärmeföreningen Olaf Palmes gata 31 101 53 Stockholm Ture Nordenswan Tel.2. the revocation of licensing or authorisation or the delivery of warnings. alarms and insulation in connection with the laying of district heating pipes. Authorisation and licensing is awarded after application and approved examination of companies and fitters. The committee must record an up-todate list of its members. Minutes are to be kept of committee meetings. A 3. the committee must give the party the opportunity to plead its case before the decision.g. to issue licences and authorisation to fitters and Page 23 . the committee can be disbanded through decisions made in the same way as applies for amendments to the ordinances. Licensed fitters and authorised companies are registered on Svensk Fjärrvärme‘s website. Refusals must be motivated.2 Committee‘s decision method The committee decisions regarding licensing and authorisation are to be notified in writing.. Appellants must lodge their records of appeal within three weeks of the service of the decision The Technical Council must have obtained the committee‘s report before the decision.EN ISO/IEC 17021.: +46 (8) 6772718 Mailto: ture. which is enclosed with the ordinances. The committee have a quorum when at least half of the members are present.2.sealed joints. Likewise.1 Area of validity for ficensing of fitters and authorisation of fitter companies Regulations for licensing and authorisation embraces the assembly of joint systems . A 3. In cases such as e. Edition 12.

3. The committee has the task to ensure that the ordinances do not restrict competition. Holds a doctor‘s certificate according to AFS 2005:18 ‘Thermosetting plastic“. A 3. inform where the list of authorised companies and licenses fitters arc available. Is trained and examined in theory according to the Casing Joint Technology 3. The committee decides on any amendments. Holds approved application documents 2. Licence applications are made in writing to the Authorisation committee at Svensk Fjärrvärme. The committee must. A certificate of an approved theory examination and of practical training carried out at an authorised company in accordance with the requirements established by the Authorisation committee are to be enclosed with the application. standards and directives. The authorisation committee must keep a list of licensed fitters and authorised companies. The same applies if it comes to the attention of the committee that the fitter does not follow applicable laws. Licences can be revoked or limited by the committee if the conditions of licensing no longer exist. However the fitter has the right to receive reasonable time to redress these matters. The parties concerned are obligated to provide the committee with the details and documents that the committee may find necessary for checks or an objective examination of submitted complaints. 1 Guideline value: 500 executed joints under the supervision of a Iicensed fitter Page 24 . certificate of completed courses in “Hot Work“. A 3. Holds a certificate from the inspector. appointed by the supplier. VUC‘s ‘Basic course in safety on the road“ as well as training in the risks and safety actions when working with thermosetting plastic according to AFS 2005:18 “Thermosetting plastic“.1 Requirements As conditions for licensing it applies that the fitter: 1. The authorisation committee can appoint inspectors with the task of examining that the company and fitters uphold established quality requirements. A 3.companies. for practical experience1 and specifically executed joint work on site 5.3 Licensing of fitters Licences for assembling the joint system are issued to fitters that have completed examination and who conform to the committee‘s requirements. Holds a certificate from a joint supplier of authorisation in the joint type in question and specific execution 4.3. Authorisation and licenses can be revoked by the committee if any of the conditions for authorisation or licensing are no longer fulfilled. However the authorised company has the right to receive reasonable time to redress these matters. standards and directives. The same applies if the company does not observe the laws.2 Charges for Iicensing The charge for licenses is SEK 300. The committee must examine submitted complaints. in an appropriate manner.

4. Authorised companies and licensed fitters are registered on Svensk Fjärrvärme‘s website. company or authorized signatory or other circumstances of significance these must be reported immediately and without request to the committee.4 Authorisation of fitter companies The authorisation application is made in writing to the authorisation committee at Svensk Fjärrvärme.3 Obligations for suppliers of joint systems Suppliers of joint systems are responsible for documented assembly instructions and the training of fitters. Authorisation and licensing can be revoked. etc that the company does not follow applicable laws.A 3. standards and directives. Training updates must take place at least every second year.1 no longer exist. The same applies if it comes to the attention of the committee via inspections. In the event of changes regarding the authorised company‘s fitters. the company has the right to receive reasonable time to redress these matters. Authorised companies receive a certificate issued by the authorisation committee. However. see Figure 13 and Figure 14. Page 25 . This also applies to such circumstances that can affect the company‘s ability to satisfactorily fulfill its duties or if the company ceases with joint assembly. Should the authorisation cease to apply the certificate must be returned without delay to the authorisation committee. A 3. The application is made using the application form issued by the authorisation coinmittee. The authorised company is responsible to the client that the requirements demanded here are satisfied. The supplier must also ensure that the fitter is checked by independent inspectors at least every second year. This can occur if demands as set out in A 3.3.

Figure 13: Authorisation application Figure 14: Personal details Page 26 .

Holds appropriate liability and contractor insurances 3.1 Requirements As conditions for authorisation it applies that the company: 1. Figure 15: Annual report 2 Quality system is defined as the measures the company documents in work descriptions and which are routinely performed in connection with assembly work. Presents the quality system2 6. Upholds submitted details 5. Holds approved application documents 2.g. Gives inspectors the possibility to make inspections and rectify any shortcomings 8. inspection of machine functions. These can include e. Page 27 . Work descriptions must be drawn up which comprise assembly instructions and instructions for handling defective products and nonconformity at the assembly site. Observes demands from the authorities and directives issued by the client 4.4. Pays established taxes and charges Annual reports are submitted to the authorisation committee with support of Figure 15. self-inspection of joining and work protocols.A 3. Is responsible that assembly work is carried out by licensed fitters 7.

Ordinances for the district heating industry´s authorisation committee. cloudy.Assembly conditions.Pressure testing of joint .Responsible fitter with license number . Check-box for sunny.Joint type .Client .Pipe temperature supply / return .6 Regulations . Protocols are to be drawn up in A4 format for the joints and must contain at least the following data: . 2008 .Assembly date . 2008 Page 28 .Excavation. A 3.Workplace .Alarm value .Signature of inspector / contact person and date A 3.2 Charges The authorisation committee may levy the charges for authorisation of companies.Dimensions .Company and Authorisation number .A 3. check-box for approved all non-approved + line for remarks . The label must be impervious to the surrounding environment.Air temperature .4.5 Identification and marking of joints Authorised companies must equip each joint with a label containing the name of the company and a serial joint number.Authorization application . light ram. steady ram .Regulations for authorization and licensing. The size of the label must be at least 5 x 10 cm and the numbers must be clear with a height of at least 8 mm.Miscellaneous .