Relevant certificates of Zhangjiagang Free Trade Zone Henglong Steel Pipe Co., Ltd

绿色供应链管理体系证书

Green packaging implementation unit

美国石油学会API标志使用授权证书

Certificate of Authority to use the Official APi Monogram

ISO14001

ISO14001

绿色包装实施单位证

Green packaging implementation unit

实验室认可证书ISO17025

Laboratory Accreditation Certificate ISO17025

ISO9001

ISO9001

压力设备材料制造商的质量管理体系证书

Quality Management System Certificate of Pressure Equipment Material Manufacturer

特种设备生产许可证

Special Equipment Production License