... on ,plate ,blind ,lap joint ,threaded,socket welding flange .standard:ansi16.5 ,din ,gost,en 1092,bs 4504fittings :elbows ,caps ,tees ,reducersstandards ... .9,gost ,din We are a leading manufacturer in flanges and pipefittings in China and our products have been exported ... Middle East,Southeast Asia,South America and WEST Europe.the flanges and the pipefittings collection in the most standard and ...