Threaded Union

Pipe Union Pipe union is a kind of high pressure forged fittings, include class3000 and class 6000. It has two different types, one is socket welding union, the other is threaded union.Materials for union are carbon steel, alloy steel, stainless steel and nickel alloy.The size range is from 1/8`` to 3``. About threaded union, you will find screw on the inside of it. It is also called screw pipe union. Internal pipe threads shall be NPT comply with ASME ASME B1.20.1 Standard. CLASS 3000 pipe unions, the end is socket welding. No matter which type of forged pipe union, the standard shall meet the requirements of MSS SP-83.