European Standard relevant to HPLs. Contains the definition of the different HPL typologies, the essential requirements and the test method descriptions to be used for determining the product performances in the different application fields. At present EN 438 consists of 9 parts: part 1 is a guideline; part 2 includes the test methods; part 3 to 6, part 8 and 9 specify the different typologies; part 7 is mandatory only for laminates applied in the Construction field. See also “standard”.