... Director of Cangzhou City Sined Steel Pipe Group Co.,Ltd China. Thanks your attention for reading brief introduction of ... and Thermal Power Generation. Meantime, we have attained ISO9001:2000 International Quality Management System certification, API 5L Certification, GB/T9711 ... sincerely Mr.Jim Cangzhou City Sined Steel Pipe Group Co., Ltd No.32, Shigang Road, Technical Economic Development Area, ...