... Cangzhou City Sined Steel Pipe Group Co., ltd Profile Cangzhou City Sined Steel Pipe Group Co., ltd was established in 2003, located ... Generation. Meantime, we have attained ISO9001:2000 International Quality Management System certification, API 5L Certification, GB/T9711.1- ... Yours sincerely Mr.Jim Cangzhou City Sined Steel Pipe Group Co., Ltd No.32, Shigang Road, Technical Economic Development Area, ...