Страница 3: ДСТУ EN 13067:2016. Plastics welding personnel — Qualification testing of welders — Thermoplastics welded assemblies (61683)

Table 4 — Short term tensile welding factor fs to be obtained

In case of Subgroups 1.4 and 1.5 the test pieces shall be cut longitudinally into quarters and each of the four test specimens shall be visually examined and any imperfections observed shall be recorded, in particular any non uniformity of the gap between the pipe and socket and excessive weld material. After not less than 24 hours after sectioning the test specimens shall be heated in an oven using the conditions given in Table 5. After heating the pipe and socket shall be separated manually minimising the shearing between the two parts and the inside of the socket shall be visually examined.

At least 70 % of the socket surface shall have a whitened rough texture, which indicates that the area was welded. In addition, any unbonded area shall have a longitudinal length not greater than 50 % of the socket length.

Table 5 — Heating conditions for longitudinal sections (Subgroup 1.4 and 1.5 test pieces)

10. Test result and qualification test certificate

    1. Overall assessment

For the overall assessment the results of the practical and theoretical parts of the test are collected together. Both parts shall conform and the qualification test is passed.

The candidate is considered to conform to the practical test if the requirements of each of the evaluation sections (see Clause 8 and Clause 10 as appropriate) are fulfilled.

The welder's qualification test certificate shall be issued by the CIA in compliance with EN ISO/IEC 17024 in the language (or languages) agreed upon by the parties involved and contain at least the following information:

• welder's full name;

• date, place and country of birth;

• clear photograph of good likeness;

• reference to this standard and the group of materials and sub-group number(s) of qualification test passed according to Table 1 or Table 2;

• date of overall assessment pass;

• date of issue;

• period of validity;

• signature of PWE;

• Certificate Issuing Authority (full name and address);

• individual certificate identification number.

Copyright to the qualification test certificate remains with the CIA.

Annex В gives a recommended format to be used as the welder's qualification test certificate.

11.4 Theoretical test

A minimum percentage of 80 % of correct answers given are required to award an acceptable result in the theoretical test defined in 5.3.

12. Failed test

The welder shall undergo further education and training at a training centre prior to taking a new qualification test.

12. Period of validity

    1. Initial qualification

The validity of the welder’s qualification begins from the date of the last qualification test (practical or theoretical) that was passed. This date may be different to the date of issue marked on the certificate.

A welder's qualification shall remain valid for a period of two years providing the following conditions are fulfilled:

1. the welder shall be engaged with reasonable continuity on welding work within the range of qualification corresponding to the qualification test certificate. An interruption period longer than six months is not permitted;

2. there shall be no specific reason to question the welder's skill and knowledge;

3. annually the manufacturer shall establish that the welder's quality is in accordance with the technical conditions under which the qualification test certificate is awarded.

Ary ‘actor not in accordance with the conditions stated in a), b) and c), the qualification test certificate shall be carcelled.

Prolongation is only allowed when the CIA is advised before expiry of the period of initial qualification.

Prolongation is only allowed when proof of welding quality is available to the CIA who accept this is the case. The validity within the range of qualification is extended under the original qualification for a further two years provided the conditions according to 13.1 are fulfilled. When this prolongation expires a new qualification test is required.

12. Qualification test certificate renewal

A qualification test taken within three months before the expiry date of the test certificate shall commence from that date of expiry.

Annex A

(informative)

Welding recording sheet

Manufacturer's WPS : Reference No :

Material: Grade Reference trade designation :

Annex В
(informative)

Welders qualification tests certificate format

Welder's full name:

Date place and country of birth:

Testing standard: EN 13067

Group of material and sub-group(s) (according to Table 1 or Table 2):

Date of overall assessment pass:

Date of issue:

(Photograph)

Validity of qualification until:

Signature of PWE:

CIA:

• full name:

• full address:

• individual certificate identification number:

Annex C
(informative)

PWE evaluation sheet for practical test

C.1 Welding process: Hot gas round nozzle - Hot gas high speed nozzle

Type of product: Sheet Pipe

Dimensions: e_n = mm d_n= mm e_n= mm

SDR

Welder's name: Control No./Code