scope:

This Technical Specification provides guidance for the minimum content of welding procedure specifications for the following welding processes:

- hot gas welding: round nozzle, high speed nozzle, wedge;

- extrusion welding;

- heated tool welding: butt, socket, wedge;

- solvent welding: socket;

- electrofusion welding: socket, saddle.

This Technical Specification applies to the welding of the following products and semi-finished products made of thermoplastic materials:

- sheet;

- pipe;

- fittings;

- lining membrane.