文章摘要:This European Standard applies to valves of DN15 and greater, made of metallic materials for chemical and petrochemical plants. It contains additional requirements to those contained in the relevant European product standards.Two levels of quality are included. All valves shall meet the requirements of level I. Valves shall meet the requirements of level II only when required by the order.NOTE: It is assumed that the essential safety requirements of the PED （satisfied by European product standards） and safety requirements from other standards are satisfied.

文章关键词: