Application specification
1.Design standard: API 6D, GB/T 12237, GB/T 19672
2.Structure length: API 6D, ASME B 16.10, GB/T 12221
3.Connection dimension: ASME B 16.5, ASME B16.47, GB/T 9113, HG20592
4.Test and inspection: API 598, API 6D, JB/T 9092, GB/T 19672, GB/T 26480