Home / Standards / GB/T 12622-90 GB/T 12622-90 Pipe flange gaskets—Test method for compressibility and recovery 管法兰垫片 压缩率及回弹率试验方法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A