... Material :Q195/Q215/Q235/A53(A,B)Product Nameerw black welded steel pipesSpecificationOut diameter245-457mmWall thickness4.75-25mmLength3--12m or ... (A,B)TechniqueERW/hot rolled/cold rolledSurface treatmentOiled or black painted or as clients' requirementApplicationOil,gas,water and other ... CFR/CIFSupply ability15,000 Metric ton/monthWe are Shijiazhuang Beihai Pipe Co.,Ltd in China . has a history of ...