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        Location:产品首页 >> Product Center >> Spiral Steel Pipe >> Spiral Steel Pipe for Heat
        • 产品名称: Spiral Steel Pipe for Heat
        • 产品编号: A008
        • Views : 33

        Production Name:Spiral Steel Pipe for Heat
        Standard:GB/T9711-2011 PSL1
        Grade:Q235B
        Specification:Φ820×12×12000mm
        Technical Requirement:
        O.D.Tolerance of Pipe: Body≤±±0.5%D; whichever is the greater :±4.0mm;End≤±1.6mm
        Tolerance of Wall Thickness:≤±0.1t
        Out of Roundness:Body≤0.015D; whichever is the greater :±15mm;End≤0.01D whichever is the greater :±13mm
        Tolerance of Length: ±50mm
        Straightness: Full length ≤0.2%L; the end of each steel pipe length 1m within the scope ≤4.0mm
        Out of squareness ≤1.6mm
        Bevelled:30°-35°
        Blunted Edge:1.6±0.8mm
        Height of outer welded seam:≤3.5mm
        Height of inner welded seam:≤3.5mm
        Hydrostatic test pressure ≥4.1 MPa delay time≥10s
        Non-destructive Inspection::The full length (100%)of welded seam