The integral connections made of high strength alloy steel are allheat-treated to enhance load -bearing capacity and lengthen service life. They may have union ends for easy connection with varous cementing or fracturing equipment, or have a welded end connector which is designed as per API SPEC 16C.

Crossover are used for connection between different size or thread pipes. They are forged of high strength alloy steel, and machined by NC mashine tools. We can provide various types of crossovers as per customers' requirements.