... Russian Standard flange OUR INTRODUCTION: We are a leading manufacturer and exporter in flanges and pipefittings in China and our products ... Asia,South America and WEST Europe.the flanges and the pipefittings collection in th emost standard and material. FLANGE: WELDING NECK , ... SLIP ON ,THREADED,LAP JOINT,SOCKET WELDING ,BLIND ,NO PLATE FLANGE 4) DIN :PLATE,WELDING NECK ,BLIND ,SCREWED,LAPPED 5 ...