Design and manufacture: AWWA C**4,API **9
Face to face/end to end: ASME B*6.*0
Pressure temperature rating: ASME B*6.*4
End flange dimension: ASME B*6.5(for NP ≤ *4); ASME B*6.*7 series
B, API **5 or ASME B*6.*7 series A, MSS SP**4 (for NPS bigger than
*4), ISO *****1, JIS B***8, BS ****7
Inspection and test: MSS SP**1,API **8