The Slip on Flange is welded both inside and outside of the pipe or fittings to provide strength and prevent leakage. The bore of Slip on Flange is slightly large than the diameter of the pipe or fittings, which should be set short of the flange face by thickness of the pipe wall plus 1/8" of an inch to avoid damage to the flange face.
Duwa Piping manufactures slip on flange in all steel material and sizes, and can be delivered in 3days.
China pipeline manufacturer DUWA PIPING specialize in PE/Epoxy/PEX coated flanges and fittings(elbow,reducer,tee,cap,coupling,nipple,plug),size 1inch to 24inch