... .Standard:ASTM A53,BS1387,API 5L,GB/T3091 4.Own two factory 5.MOQ:10MT COMMODITYASTM A53 ... BS 1139 Qualified 3/4'' ERW Carbon Steel Round PipeOD 26.7mm THICKNESS1 ... 40-80 g/m2Cold/electro-galvanized:<40 g/m2LENGTH 4-12 m or customized MATERIAL Q195-Q345,A36, A53,ST35, ... fluid pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleum and natural gas industry 5. Chemistry industry 6 ...