Welcome to visit Boai Steel Group Website!
Welcome to visit Boai Steel Group Website!
Welcome to visit Boai Steel Group Website!
Location: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 : 40

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