... : tee fitting 2)Size:1/2"-72" 3)Standard:ANSI B16.9,JIS,DIN ,GB etc ... bulging and hot forming two.A. Hydraulic bulgingThree way hydraulic bulging through metal material compensation axial expansion ... smaller volume and pressure, when the reach three way pipe bulging out of the required pressure, metal ... into pushing, pressing, forging, casting and other.3 in order to create a standard can be divided ...