SN 219 505 8-1978 Weld preparation juncture forms on steel butt joint fusion welding of steel tubes 《管道 适用于电弧焊的带颈平焊法兰 G ND25，NW 175至500》.pdf

相关资源

HG 21530-1995 带颈平焊法兰手孔.pdf

HG 20616-1997 带颈平焊钢制管法兰（美洲体系）.pdf

HG 20594-1997 带颈平焊钢制管法兰（欧洲体系）.pdf

HG T 21530-2005 带颈平焊法兰手孔.pdf

GB T 9116-2010 带颈平焊钢制管法兰.pdf

HG 20594-1997 带颈平焊钢制管法兰(欧洲体系).pdf

GB T 15530.4-1995 铜合金带颈平焊法兰.pdf

HG 20616-1997（编制说明） 带颈平焊钢制管法兰（美洲体系）.pdf

GB T 9116.11-1988 PN 1.6MPa(16 bar) 凹凸面带颈平焊钢制管法兰.pdf

GB T 9116.2-2000 凹凸面带颈平焊钢制管法兰.pdf

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