... supply to you various steel pipes according to international standard. Black steel pipes are used in the following fields, steel structure, build structure ... since our good quality and service. 2. Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39, JIS3 ... ectMOQ20 TONDELIVERY TIME20-30 DAYSPACKING1,Big OD:in bulk2,Samll OD:packed by steel strips3,woven cloth with 7 ...