1. OD:32-720mm 2.WT: 3-100mm 3.Metarial: API 5L/ASTM A106GR.B,Q345B 4.Certification: API,SO9001,ISO9002 As a trading company, our business, Liaocheng Huililai Import and Export Co., Ltd, has developed into seamless steel pipe, stainless steel pipe/plate, alloy steel pipe.. We are one of the biggest agent of Chengdu Steel Group Co., Ltd., Baotou Steel Group Co., Ltd., Anshan Iron and Steel Company ...