Our company is a professional manufacturer of OCTG casing and tubing pipes under API Spec. 5CT. In order to assure product quality, our company has established inside quality Control Lab with advanced chemical and physical inspection equipment, such as metallographic microscopes, and NDT testing equipment and so on. We also have following inspections to ensure product quality. Size and surface inspection Non-destruction test Thread Inspection Hydrostatic test Drifting test Physical and chemical analysis Hardness and pressure test The third party certification
