... our product include: all kinds of dowel pins,sheel pin, double cone pin, Casing head forging, tubing head forging, casing spool ... , six-way forging, eight-way forging, valve body forging, double-flange joint forging, locking coupling forging, and so on. Materials ... production capacity above 35, 000T/year, our company have built advanced physical and chemical laboratory cable of doing heat treatment, UT ...