Design standards: API 623, BS 1873, ASME B16.34, GB/T12235, MESC SPE 77/200
Structural length: ASME B16.10, GB/T 12221
Connection standards: ASME B16.5, GB/T 9124, JB/T 79, HG/T 20592, ASME B16.25
Pressure test: API 598, GB/T 13927, GB/T 26480, JB/T 9092, BS 6364
Pressure and temperature rating: ASME B16.34, GB/T12224
