Product Name: Flange Lap Joint Ring Stainless Steel Coupling 5 Hole Guard Making Machine Tdf Duct Forming Uni Lap Flange Model NO.: DN15-600 Manufacturing Way: Forging Sealing Surface: RF Connection: Welding Structure: Round Material: Stainless Steel Type: Blind Standard: ANSI, DIN, GB, JIS, GOST, BSW Trademark: XQ Transport Package: Wooden Case Specification: DN15-600 Origin: China HS Code: 7307 Product Description material:carbon steel and stainless steel (ASTM A105, Q235, SS304, SS316, SS304L, SS316L)standard:ANSI B16.5, JIS, DIN, EN1092techonology:forgedsize: DN15-DN600type:slip-on, lap joint, welding neck, socket welding, threaded, blind.pressure:150LBS, 300LBS, 600LBS, 900LBS, 1500LBS...treatment:anti-rust oil, black painting, yellow painting ...wall sickness:sch40, sch80...face type:FF, RF, LJ, RTJ, TG.usage:the flanges are used for the connection of tubes that transport water, oil, gas, etc.