Home / Standards / GB/T 20657-2022 GB/T 20657-2022 Active Petroleum and natural gas industries—Formulae and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing 石油天然气工业 套管、油管、钻杆和用作套管或油管的管线管性能公式及计算 Standard Type GBT ICS 75.180.10 CCS E 92 Status 现行 Issue Date 2022-12-30 Implementation 2023-04-01 Responsible Dept 国家标准委 Drafting Unit N/A