Product Description                                     Characteristics  Pressure unions are made of high strength alloy steel with advanced technology. The strict heat treatment ensures consistent microstucture and bearing capacity of the joint,The material are in full compliance with US ASTM and AISI standards. The product technical specifications and completely in accordance with AP Spec 6A. The products featured reliable sealing, fast assembling,and good interchageablity.The union use pioeline thread tubing thread butt or pressure seal end connections