Home / Standards / GB/T 21412.4-2013 GB/T 21412.4-2013 Active Petroleum and natural gas industries―Design and operation of subsea production systems―Part 4: Subsea wellhead and tree equipment 石油天然气工业 水下生产系统的设计与操作 第4部分:水下井口装置和采油树设备 Standard Type GBT ICS 75.180.10 CCS E92 Status 现行 Issue Date 2013-12-31 Implementation 2014-10-01 Responsible Dept 国家标准委 Drafting Unit N/A