This European Standard specifies the method of testing the knowledge and skill of a welder who is required tocarry 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 standard guarantees that the examination is carried out according to a uniform test procedure.This European Standard applies when the contractor or the authorities responsible for the application require Gas and water utility network industries with alternative qualification programmes are excluded fromThis standard.