Home / Standards / GB/T 31185-2014 GB/T 31185-2014 Active Technical requirements of tubular goods manufacturing consulting service for oil and gas pipeline project 石油天然气管道工程用管材制造监理技术要求 Standard Type GBT ICS 03.080.99 CCS A20 Status 现行 Issue Date 2014-09-03 Implementation 2014-10-01 Responsible Dept 国家标准委 Drafting Unit N/A