Besides API gauges, we also provide calibration service to OCTG manufacturers, oilfield service companies and machine shops. We keep long-term strategic cooperation relationship with Baoji Baoshi Petroleum Thread Gauges Inspection Center which is a national-level laboratory and is accredited to ISO/IEC 17025:2005 by CNAS. The calibration certificate is traceable to NIM (China National Institute of Metrology) and valid for API audit. The Center has been conducting periodic calibration of API working gauges for over 20 years, and serving customers domestic and abroad.
The Center is endowed with powerful technological resources. The experts team of the Center consists of Xufeng Duan, Dexiang Tong, Zhonghai Ma, Yurang Li and Guifen Ran. Some of them are in charge of drafting national standards for oilfield drilling tools connection threads and measurement and calibration norms for gages, and take part in drafting measurement and inspection regulations of China National Petroleum Corporation. They have rich experiences of designing, manufacturing, inspecting and supervising OCTG thread gages for over 40 years.