Svetsmetoder

This document specifies requirements for the:

— approval of training facilities, testing and maintaining the skills of aluminothermic welders and welding trainers. It applies to those aluminothermic welding processes compliant with the requirements of EN 14730-1. It requires that the system for training and testing of welders be approved by the railway authority;

— approval of aluminothermic welding contractors. It applies to those contractors using aluminothermic welding processes compliant with the requirements of EN 14730-1 and who employ welders in the possession of a valid permit to weld as defined in Clause 4 of this standard;

— acceptance of the final aluminothermic weld inspections and aluminothermic weld inspectors approved by the railway authority. It does not cover any previous weld inspections by the welder or others.

This document also applies to aluminothermic welds produced on Vignole railway rail 46 kg/m and above, as contained in EN 13674-1.

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, high speed nozzle, 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;

— fittings;

— 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