Design & Manufacturing : API602/ISO 15761 for Class 150 & 1500, ASME B 16.34 for Class 2500 Inspection and Testing: API 598, BSEN 12266 Part - 1 & 2 End Dimension : ASME B 16.11 for Socket Weld & ASME B 1.20.1 for Screwed End BW End Dimension : ASME...