... union High-pressure union, importing international advanced technology, is forged with high-strength alloy steel, strict heat treatment ... 600#, 602#, 1002#, 1003#, 1502# and 2002#. It is an important part for transporting oil. Water, fracturing fluid and mixed ... of pipeline thread, tubing thread, butt-weld. Connections Type:Component Parts:Application: pipeline thread, tubing thread, butt-weld;Nut ...