Design and Manufacture: API 600 （ISO 10434）or API 6D
Inspection and Test: API 598, API 600 or API 6D.
End Flange Dimension: ASME B16.5(for NPS≤24); ASME B16.47 series B, API 605 or ASME B16.47 series A, MSS SP-44（for NPS＞24).
BW End Dimension: ASME B16.25.
Socket-weld Dimension: ASME B16.11.
Face to Face and End to End: ASME B16.10.
Pressure Temperature Ratings: ASME B16.34