... oilfield equipment 3.WP:High pressure Well head assembly(hammer union) High-pressure union, importing international advanced technology, is forged with high ... #, 1003#, 1502# and 2002#. It is an important part for transporting oil. Water, fracturing fluid and mixed fluid . These products ... valve, mud gate valve, chock valve, etc)3) Fitting(union, manifold,elbows), bop. Well head assembly(hammer union)