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ASTM A36 Pipe/Gas/Oil Pipeline Large Diameter Hot Rolled Spiral Welded Round Carbon Steel Pipe High Quality Steel Tube Seamless Carbon Steel Pipe ASTM A106/API 5L carbon steel pipe sch120 seamless steel tube High Quality Astm A500 MS Galvanized Square Tube Hollow Section Rectangular Pipe Price List api 5l grade b carbon steel pipe q235 seamless steel pipe hot rolled carbon steel tube Hot Rolled Iron Pipe Carbon Steel Tube MS Seamless Steel Pipe Manufacturers ASTM A516Gr70 API Oil Pipe 12m Length GB Standard Wholesale hot dip gi seamless galvanized round steel pipe ASTM A106 Sch 40 ERW GI Iron Tube 
