Cangzhou Qiancheng Steel-Pipe Co., Ltd., seated in the Industrial Zone, Yanshan County, Hebei Province, one of the large-scaleenterprises in North China specializing in producing and marking steel pipe and pipe fittings. It is of convenient transportation as it isonly 200 km away from Xingang, Tianjin, China. 　　Our company covers an area of 80, 000 m2 with a total assets of 90 million Yuan. There are 360 staff members including 80technicians in our company. We also establish a effective complete quality control and assurance system. In 2003, our companyobtained the certificate of ISO9001 Quality System Authentification, and it started to control the quality in accordance withAPI 5L and API 5CT in 2004.