Design and Manufacture:API 6D,API 608,MSS SP-72,BA
                                    5351,BS 6364,NACE MR0175
Inspection and Test:API 598,API 6D,API 6FA,BS 6755,BS
                             12569,MSS SP-82,MSS SP-61
End flange dimension:ASME B16.5(for NPS¡Ü24);ASME
                                B16.47 series B,API 605 or AMSE
                                B16.47 series A,MSS SP-44 (for
                                NPS>24),ISO 7005-1,JIS B2238,BS
                                12627
BW end dimension:ASME B16.25
Socket-weld dimension:ASME B16.11
Face to face and end to end:ASME B16.10,ISO 5752,BS
                                          558,BS 12982
Pressure-temperature ratings:ASME B16.34