High pressure by the introduction of international advanced technology, the use of high-strength alloy forging, strict heat treatment to ensure that the streets have uniform uniform microstructure and pressure capabilities, the use of materials in full compliance with ASTM and AISI standards, product specifications in full compliance with the APISpec 16A standard, reliable product sealing, loading and unloading fast, universal interchangeability.The product can be connected with pipe threads, tubing threads, butt-welded or sealed ends.