This European Standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for inch series, pipe couplings, swivel flanges, for temperature ranges from type II to type V according to ISO 6771:2007 and nominal pressure up to 21 000 kPa (class D according to ISO 6771:2007). In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in accordance with equipment or component specification requirements.