SH/T 3403-2013
石油化工钢制管法兰用金属环垫
Metallic ring joint gaskets for steel pipe flanges in petrochemical industry
2013-10-17
HG/T 20633-2009
钢制管法兰用金属环形垫(Class系列)
Metallic ring joint gaskets for use with steel pipe flanges (Class designated)
2009-02-05
HG/T 20612-2009
钢制管法兰用金属环形垫(PN系列)
Metallic ring joint gaskets for use with steel pipe glanges (PN designated)
2009-02-05
GB/T 9128.2-2023
钢制管法兰用金属环垫 第2部分：Class系列
Metallic ring joint gaskets for steel pipe flanges—Part 2：Class designated
2023-09-07
GB/T 9128.1-2023
钢制管法兰用金属环垫 第1部分：PN系列
Metallic ring joint gaskets for steel pipe flanges—Part 1：PN designated
2023-09-07
JB/T 89-2015
管路法兰用金属环垫
Metallic ring-joint gaskets for steel pipe flanges
2015-10-10