EN 13067:2020

SLOVENSKI STANDARD
01-november-2020
Nadomešča:
SIST EN 13067:2014
Osebje za varjenje polimerov - Usposobljenost varilcev - Varjenje plastomerov
Platics welding personnel - Qualfication of welders - Thermoplastics welded assemblies
Kunststoffschweißpersonal - Anerkennungsprüfung von Schweißern - Thermoplastische
Schweißverbindungen
Personnel en soudage des plastiques - Qualification des soudeurs - Assemblages
soudés thermoplastiques
Ta slovenski standard je istoveten z: EN 13067:2020
ICS:
03.100.30 Vodenje ljudi Management of human
resources
25.160.10 Varilni postopki in varjenje Welding processes
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13067
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 03.100.30; 25.160.10 Supersedes EN 13067:2012
English Version
Plastics welding personnel - Qualification of welders -
Thermoplastics welded assemblies
Personnel en soudage des plastiques - Épreuve de Kunststoffschweißpersonal - Qualifizierung von
qualification des soudeurs - Assemblages soudés Schweißern - Thermoplastische Schweißverbindungen
thermoplastiques
This European Standard was approved by CEN on 26 July 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13067:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 7
4 Admission to the qualification tests . 10
5 Testing of skill and knowledge . 10
5.1 General . 10
5.2 Practical test . 10
5.3 Theoretical test . 11
5.3.1 General . 11
5.3.2 Questions . 11
6 Duty of Plastics Welding Examiner and invigilator . 18
7 Range of qualification . 18
8 Welding of test piece . 19
8.1 Difficulties and corrections whilst welding the test piece . 19
8.2 Inspection requirements . 19
8.3 Test piece . 19
9 Test piece and test specimens, shapes and dimensions. 19
10 Evaluation and acceptance criteria of test piece(s) and test specimens . 28
10.1 General . 28
10.2 Visual examination . 28
10.3 Destructive tests . 28
10.3.1 General . 28
10.3.2 Bend test . 28
10.3.3 Peel test . 28
10.3.4 Tensile test . 30
10.3.5 Visual examination of longitudinal cross-sections . 31
10.4 Non-destructive tests — High voltage test . 31
11 Test result . 31
11.1 Overall assessment . 31
11.2 Practical test . 32
11.3 Theoretical test . 32
12 Failed test . 32
13 Period of validity . 32
13.1 Initial qualification . 32
13.2 Prolongation . 32
14 Qualification renewal . 32
Annex A (informative) Welding record sheet - Heated tool butt welding of pipes . 33
Annex B (informative) PWE evaluation sheet for practical test . 34
B.1 Welding process: Hot gas round nozzle - Hot gas speed .34
B.2 Welding process: Extrusion welding .36
B.3 Welding process: Heated tool butt welding .38
B.4 Welding process: Heated tool socket welding - Heated tool saddle welding .40
B.5 Welding process: Electrofusion socket welding - Electrofusion saddle welding .41
B.6 Welding of lining membranes .42
B.7 Welding process: Solvent welding .46
Bibliography . 47

European foreword
This document (EN 13067:2020) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the
secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13067:2012.
In comparison with the previous edition EN 13067:2012, the following technical modifications have
been made:
— in Clause 1 Scope for the different group of materials in a) for sheets, pipes and fittings, group 1
includes also ABS; b) is for lining membranes and flooring. In c) for pipes and fittings, the group 10
is for PA-U 11 or PA-U 12;
— subclause 5.3 has been redrafted with subclause 5.3.1 General, making reference to Table 3 -
Welding processes for the theoretical test and Table 4 - Minimum number of questions for the
theoretical test, and with subclause 5.3.2 Questions;
— in Table 1, the group of material 10 PA-U has been added;
— in Table 2 for the group of material 6 PVC-P the range of e has been modified from e = 2 to
n n
1 ≤ en ≤ 3 and the sub-groups 6.5, 6.6 have been added; for the group of material 7 PE, the sub-
groups 7.6, 7.7 and 7.8, have been added and the range of the nominal wall thickness is: 0,75 ≤ e ≤ 1;
n
— Figure 9 — Test piece for lining membranes – Butt weld with V preparation, has been added and
the numbering of the other ones has been changed;
— in 10.3.4 indications have been added for the tensile test of test specimens of PE pipes with wall
thicknesses greater than 30 mm;
— subclause 10.4 Non-destructive tests on the high voltage test, has been added;
— Clause 11 is only for test result, there is no more reference to qualification test certificate.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
This document covers the principles to be observed in the qualification testing of welder performance
for the welding of thermoplastic materials.
The ability of the welder to follow verbal or written instructions and testing of his skill are important
factors in ensuring the quality of the welded product.
This document is intended to provide the basis for the mutual recognition by examining bodies for
qualification relating to welders competence in the various fields of application.

1 Scope
This document specifies the method of testing the knowledge and skill of a welder who is required to
carry out welds on thermoplastics in new constructions and repair work.
The skill examination of a welder is an essential condition for the assurance of the quality of the welding
work.
The application of this document guarantees that the examination is carried out according to a uniform
test procedure.
This document applies when the contractor or the authorities responsible for the application require it.
Gas and water utility network industries with alternative qualification programmes are excluded from
this document.
This document applies to the following welding processes:
— hot gas welding: round nozzle, speed, wedge;
— extrusion welding;
— heated tool welding: butt, saddle, socket, wedge;
— electrofusion welding: socket, saddle;
— solvent welding: socket.
This document applies to the welding of the following products:
— sheet;
— pipe (unreinforced, solid wall only);
— fittings (unreinforced only);
— lining membrane.
This document covers the welding of the following groups of materials:
a) for sheets, pipes and fittings:
— group 1: PVC (including all kinds of PVC-U, PVC-C) or ABS;
— group 2: PP (including all kinds of PP);
— group 3: PE (including all kinds of PE);
— group 4: PVDF;
— group 5: ECTFE or PFA or FEP;
b) for lining membranes and flooring:
— group 6: PVC-P;
— group 7: PE (including all kinds of PE);
— group 8: ECB;
— group 9: PP;
c) for pipes and fittings only:
— group 10: PA-U 11 or PA-U 12.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12814-1, Testing of welded joints of thermoplastics semi-finished products - Part 1: Bend test
EN 12814-2:2000, Testing of welded joints of thermoplastics semi-finished products - Part 2: Tensile test
EN 12814-4, Testing of welded joints of thermoplastics semi-finished products - Part 4: Peel test
EN 12814-8, Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements
EN 13100-1, Non destructive testing of welded joints of thermoplastics semi-finished products - Part 1:
Visual examination
EN 13100-4, Non destructive testing of welded joints of thermoplastics semifinished products - Part 4: High
voltage testing
EN 14728, Imperfections in thermoplastic welds - Classification
EN ISO 6947, Welding and allied processes - Welding positions (ISO 6947)
CEN/TS 16892, Plastics - Welding of thermoplastics - Specification of welding procedures
ISO 13955, Plastics pipes and fittings - Crushing decohesion test for polyethylene (PE) electrofusion
assemblies
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
AD-WLD break
failure mode in an extrusion welded membrane peel test specimen where the failure is through the weld
material
3.2
applicant
person who has submitted an application to be admitted into the qualification process
3.3
assessment
process that evaluates a person’s fulfilment of the requirements of the qualification scheme
3.4
candidate
applicant who has fulfilled specified prerequisites and has been admitted to the qualification process
3.5
qualification body
independent entity that administers qualifications of plastics welders and approves the PWE and/or the
invigilator
3.6
invigilator
qualified person, approved by the qualification body who can oversee the practical and theoretical tests
3.7
manufacturer
company, contractor or organization who is responsible for the welding
3.8
Plastics Welding Examiner
PWE
qualified person approved by the qualification body, who verifies the compliance with this document
3.9
qualification test
theoretical and practical tests in order to verify the knowledge and the skill of the welder
3.10
range of qualification
welding processes, types of joint, materials, thicknesses and diameters for which a welder is qualified
3.11
test piece
assembly which is welded during the practical test
3.12
test specimen
part or portion cut from the test piece for the test specified
3.13
test house
establishment having all relevant test equipment to carry out the required tests and working for
example in compliance with EN ISO/IEC 17025
3.14
training centre
educational establishment for training plastics welding personnel and/or Plastics Welding Examiner
approved by the qualification body
3.15
welding process
technique characterized by the method of softening to obtain permanent assembly
3.15.1
electrofusion welding
softening of fitting and pipe surfaces to be welded is obtained by means of a heating element embedded
in the fitting which remain between welded joints
3.15.2
extrusion welding
welding process in which an extruder unit with a melting chamber gives the extruded material required
by the thickness and shape of the joint
Note 1 to entry: Hot air or inert gas heats simultaneously the parent material.
3.15.3
heated tool welding
welding process in which the joint surfaces are adequately heated by exposure, through direct contact
with heated elements and are welded under pressure, which includes butt fusion welding (also called
hot plate welding, platen welding or mirror welding) and socket fusion welding
3.15.4
heated wedge welding
welding process in which the lining membrane welded is gripped by rollers which guide and propel the
welding machine which uses either hot gas to heat the lining membrane and the wedge to effect the weld
or electrically heated wedge to heat the lining membrane in the area being welded
3.15.5
hot gas speed welding
welding process in which the welding rod is suitably guided and pre-heated and the nozzle tip is
provided with a profiled area to apply the welding pressure
3.15.6
hot gas welding
welding process in which the materials to be unified are softened by hot air or inert gas and are pressed
together
3.15.7
hot gas round nozzle welding
welding process in which the pressure is applied via the welding rod or a suitable attachment such as a
pressure roller
3.15.8
solvent welding
softening of fitting and pipe surfaces, by means of a solvent contained in the cement
Note 1 to entry: After suitable cure time, the solvent dries leaving the parent material in the interface between
welded joints.
3.16
welding procedure specification
WPS
document providing in detail the required variables for a specific application to assure repeatability
3.17
welding record sheet
document recording in detail the variables used during the practical test
3.18
welder
person making a welded assembly by any process, whose manual skill and knowledge are two of the
determining factors influencing the quality of the welded joint, or person performing a welding
operation by means of mechanical or automatic equipment
4 Admission to the qualification tests
Only applicants whose training and/or for whose previous activities show that they are likely to pass
the planned test may be admitted as a candidate. As a rule this is the case if one of the following
conditions is met:
— completed apprenticeship as plastics fabricator;
— at least two years of experience as a plastics welder confirmed by manufacturer’s declaration;
— completion of both a technical and practical training course in preparation for the plastic welders
qualification test.
An example of a suitable training course is defined in Entry [1] in the Bibliography or may be identified
in national standards.
5 Testing of skill and knowledge
5.1 General
During the qualification test, the candidate shall demonstrate his practical skill according to 5.2 and his
theoretical knowledge according to 5.3.
5.2 Practical test
This part of the qualification test is carried out under the supervision of the PWE or invigilator.
The candidate shall complete the test piece specified by the required sub-group in Table 1 or Table 2 in
accordance with the relevant WPS.
All welding equipment, materials and documents necessary to complete the test piece shall be available
to the candidate.
All welding shall be performed in the flat position (PA), according to EN ISO 6947.
The time taken by the candidate to complete the test piece shall correspond to that taken under
production conditions.
5.3 Theoretical test
5.3.1 General
This part of the qualification test is carried out under the supervision of the PWE or invigilator.
The candidate's knowledge of the practical working rules for skilful and safe working shall be evaluated
in the theoretical test.
The candidate shall answer 20 multiple-choice questions for one welding process. If the candidate is
being tested in more than one welding process, the number of multiple-choice questions shall be
increased by five per welding process up to a maximum of 45. The different welding processes are
defined in Table 3.
The minimum number of general and welding process specific questions are given in Table 4.
Completion of the 20 questions theoretical test shall not exceed one hour and be continuous without
access to teaching aids. For any extra question a maximum time of 3 min shall be added to the previous
hour.
The questions shall cover the subjects in 5.3.2 as appropriate.
5.3.2 Questions
The questions shall cover the following general and welding process specific subjects.
General subjects:
— rules for welding of thermoplastics to which the test is designed to apply, meaning of the welding
signs and symbols of the range of work;
— knowledge concerning on-site welding;
— knowledge concerning the characteristics of thermoplastics within the sub-groups;
— knowledge concerning WPSs and welding record sheets;
— knowledge concerning non-destructive examinations and destructive tests necessary for the
applied welding process(es);
— awareness of health and safety requirements for the above work.
Subjects specific to each welding process:
— operation and control of the welding equipment;
— welding processes (for solvent welding, this includes the characteristics of solvents / cements
within the relevant sub-group);
— correct preparation of the work pieces for welding;
— preventing and correcting faults when making welds;
— knowledge concerning the types of imperfections for the applied welding process(es);
— awareness of the consequences of misapplying welding parameters and/or procedures.
Table 1 — Sheets, pipes and fitting details of practical tests
Dimensions in millimetres
Group of Sub- Type of product Welding process Weld Examination Test piece Range of qualification
d
material groups form and testing according
S = sheet P = pipe
b
Dimensions Type of joint
a to Figure
Type of test
en = nominal wall
thickness
d = nominal pipe outside
n
diameter
SDR = dn/en
1 PVC 1.1 S en = 5 Hot gas round nozzle V V/ B f+r 1 All en V,X,⊥
1.2 S e = 5 Hot gas speed V V/ B f+r 1 All e V,X,⊥
n n
1.3 S e = 5 Heated tool ][ V/ B 1 e ≥ 3 ][
n n
1.4 P d = 40 and Solvent I V/ Vls 4 d < 160 I
n n
d = 110
n
SDR ≤ 21
1.5 P d ≥ 160 Solvent I V/ Vls 4 d ≥ 160 I
n n
SDR ≤ 21
2 PP 2.1 S e = 9 or 10 Hot gas speed X V/ B f+r 1 All e V,X,⊥
n n
2.2 S e = 9 or 10 Extrusion continuous V V/ B f+r 1 e ≥ 3 V,X,⊥
n n
2.3 S en = 9 or 10 Heated tool ][ V/ B 1 en ≥ 3 ][
2.4 P dn = 110 Heated tool ][ V/ B 2 en ≥ 3 ][
SDR ≤ 17,6 dn ≤ 315
2.5 P dn ≥ 400 Heated tool ][ V/ B s 2 dn > 315 ][
SDR ≤ 17,6
c
2.6 P dn = 63 Heated tool I V/ Pc 4 All dn I
SDR ≤ 17,6
2.7 P dn = 63 Electrofusion I V/ Pc 4 All dn I
SDR ≤ 17,6
Group of Sub- Type of product Welding process Weld Examination Test piece Range of qualification
d
material groups form and testing according
S = sheet P = pipe
b
Dimensions Type of joint
to Figure
a
Type of test
e = nominal wall
n
thickness
d = nominal pipe outside
n
diameter
SDR = dn/en
3 PE 3.1 S e = 10 Hot gas speed X V/ B f+r 1 All e V,X,⊥
n n
3.2 S en = 10 Extrusion continuous V V/ B f+r 1 en ≥ 3 V,X,⊥
3.3 S en = 10 Heated tool ][ V/ B 1 en ≥ 3 ][
3.4 P 110 ≤ d ≤ 180 Heated tool ][ V/ T 2 d ≤ 315 ][
n n
SDR ≤ 17,6
3.5 P d ≥ 400 Heated tool ][ V/ T 2 d > 315 ][
n n
SDR ≤ 17,6
3.6 P 90 ≤ d ≤ 125 Electrofusion I V/ Pc 4 d ≤ 315 I
n n
SDR ≤ 17,6
3.7 P d ≥ 355 Electrofusion I V/ Pd 4 d > 315 I
n n
SDR ≤ 17,6
3.8 P d ≤ 63 Electrofusion .†. V/ Pc 5 All d .†.
n n
on
90 ≤ dn ≤ 125
SDR ≤ 17,6
c
3.9 P d = 63 Heated tool I V/ Pc 4 All d I
n n
SDR = 11
Group of Sub- Type of product Welding process Weld Examination Test piece Range of qualification
d
material groups form and testing according
S = sheet P = pipe
b
Dimensions Type of joint
to Figure
a
Type of test
e = nominal wall
n
thickness
d = nominal pipe outside
n
diameter
SDR = dn/en
3.10 P d = 32 Heated tool .†. V/ Pc 5 All d .†.
n n
on dn = 90
SDR = 11
4 PVDF 4.1 S en = 4 Hot gas V V/ B f+r 1 en ≥ 2 V,X,⊥
speed
4.2 S en = 4 Heated tool ][ V/ B 1 en ≥ 2 ][
4.3 P dn = 110 Heated tool ][ V/ B 2 All dn ][
e = 5,3 e ≥ 1,9
n n
c
4.4 P dn = 63 Heated tool I V/ Pc 4 All dn I
e = 3
n
5 5.1 S en = 2,3 V V/ T 3 en ≥ 1,6 V,X,⊥
ECTFE Hot gas speed
or FEP
or PFA
5.2 P d = 110 Heated tool ][ V/ T 2 All d ][
n n
en = 3 All en
Group of Sub- Type of product Welding process Weld Examination Test piece Range of qualification
d
material groups form and testing according
S = sheet P = pipe
b
Dimensions Type of joint
to Figure
a
Type of test
e = nominal wall
n
thickness
d = nominal pipe outside
n
diameter
SDR = dn/en
10 PA-U 10.1 P 110 ≤ d ≤ 180 Heated tool ][ V/ T 2 d ≤ 315 ][
n n
SDR ≤ 17,6
10.2 P d ≥ 400 Heated tool ][ V/ T 2 d > 315 ][
n n
SDR ≤ 17,6
10.3 P 90 ≤ d ≤ 125 Electrofusion I V/ Pc 4 d ≤ 315 I
n n
SDR ≤ 17,6
10.4 P dn ≥ 355 Electrofusion I V/ Pd 4 dn > 315 I
SDR ≤ 17,6
10.5 P dn ≤ 63 Electrofusion .†. V/ Pc 5 All dn .†.
on
90 ≤ d ≤ 125
n
SDR ≤ 17,6
a
” / ” = and; B = Bend test (f: face ; r: root ; s: side (for thick materials)) Pc = Peel test (crush test) ; V = Visual examination; Pd = Peel test (decohesion test);
T = Tensile test; Vls = Visual examination of longitudinal sections
b
Type of joint
c
Welding by machine only
d
V = V preparation; X = double V preparation; ⊥ = fillet weld; ][ = butt weld; .†. = saddle; I = socket
Table 2 — Lining membrane details of practical tests
Dimensions in millimetres
Group of Sub- Type of product Welding process Weld Examination and Test piece Range of qualification
material groups form testing according
M = membrane
Dimensions Type of joint
to Figure
a
Type of test
e = nominal wall
n
thickness
6 PVC-P 6.1 M 1 ≤ e ≤ 3 Hot gas V/ Pt 6 1 ≤ e ≤ 4 All Lap
n n
manual
b
6.2 M 1 ≤ e ≤ 3 Hot gas by machine V/ Pt 7 1 ≤ e ≤ 4 All Lap
n n
b
6.3 M 1 ≤ e ≤ 3 Heated wedge by V/ Pt 7 1 ≤ e ≤ 4 All Lap
n n
hot gas
6.4 M 1 ≤ e ≤ 3 Heated wedge V / Pt 7 1 ≤ e ≤ 4 All Lap
n n
6.5 M 1 ≤ e ≤ 3 Hot gas manual V V/HV 9 0,5 ≤ e ≤ 4 V
n n
with V-preparation
6.6 M 1 ≤ e ≤ 3 Extrusion manual V/Pt 8 1 ≤ e ≤ 4 All Lap
n n
b
7 PE 7.1 M 2 ≤ e ≤ 2,5 Hot gas manual V/ Pt 6 1 ≤ e ≤ 5 All Lap
n n
b
7.2 M 2 ≤ e ≤ 2,5 Hot gas by machine V/ Pt 7 1 ≤ e ≤ 5 All Lap
n n
b
7.3 M 2 ≤ e ≤ 2,5 Heated wedge by V/ Pt 7 1 ≤ e ≤ 5 All Lap
n n
hot gas
7.4 M 2 ≤ e ≤ 2,5 Heated wedge V/ Pt 7 1 ≤ e ≤ 5 All Lap
n n
7.5 M 2 ≤ e ≤ 2,5 Extrusion manual V/ Pt 8 1 ≤ e ≤ 5 All Lap
n n
7.6 M 0,75 ≤ e ≤ 1 Hot gas manual V/ Pt 6 0,3 ≤ e ≤ 1 All Lap
n n
7.7 M 0,75 ≤ e ≤ 1 Heated wedge V/ Pt 7 0,3 ≤ e ≤ 1 All Lap
n n
7.8 M 0,75 ≤ e ≤ 1 Extrusion manual V/ Pt 8 0,3 ≤ e ≤ 1 All Lap
n n
Group of Sub- Type of product Welding process Weld Examination and Test piece Range of qualification
material groups form testing according
M = membrane
Dimensions Type of joint
to Figure
a
Type of test
e = nominal wall
n
thickness
8 ECB 8.1 M e = 2 Hot gas V/ Pt 6 1 ≤ e ≤ 4 All Lap
n n
manual
b
8.2 M e = 2 Hot gas by machine V/ Pt 7 1 ≤ e ≤ 4 All Lap
n n
b
8.3 M e = 2 Heated wedge by V/ Pt 7 1 ≤ e ≤ 4 All Lap
n n
hot gas
8.4 M e = 2 Heated wedge V / Pt 7 1 ≤ e ≤ 4 All La
...