Home / Standards / GB/T 9253.2-1999 GB/T 9253.2-1999 Abolished Petroleum andnatural gas industries--Threading，gauging，and threadinspection of casing，tubing and line pipe threads 石油天然气工业 套管、油管和管线管螺纹的加工、测量和检验 Standard Type GBT ICS 75.180.10 CCS E92 Status 废止 Issue Date 1999-05-17 Implementation 1999-12-01 Responsible Dept 中国石油天然气集团公司 Drafting Unit N/A