ASME SA 672 Gr B60 CL 22 EFW Pipe description
ASME SA-672: American Society of Mechanical Engineers standard, equivalent to ASTM A672 (Specification for Electrically Welded Steel Pipes for Pressure Applications).
Gr.B60: Material grade, carbon manganese steel (C≤0.22%, Mn≤1.50%) with a minimum yield strength of 60 ksi (414 MPa).
CL22: Manufacturing inspection grade, requiring local non-destructive testing (≥10% weld RT/UT) + hydrostatic testing.
Electrofusion welding (EFW): Welding is achieved by melting the edge of the steel strip with an electric arc, resulting in a smoother inner wall than submerged arc welding (SAW).
ASTM A672 Gr B60 Mechanical Properties
| Grade | Mechanical Properties | Tensile strength | ||
|---|---|---|---|---|
| Yield point | Tensile Stregth | Elongation | ||
| CB60 / B60 | 220 | 415 To 550 | 25 | 415 To 550 |
ASTM A672 B60 Pipe Chemical Behaviour
| grade | Chemical Structure | |||||
|---|---|---|---|---|---|---|
| Carbon | Silicon | Manganese | Phosphorus | Sulfur | Titanium | |
| CB60 / B60 | 0.24 | 0.13 ~0.45 |
0.98 | 0.035 | 0.035 | - |
Applications
1. Petrochemical Systems
Crude Oil Transportation Pipelines
Operating Conditions: ≤6.4 MPa / ≤260℃
Scenarios: Atmospheric and vacuum distillation units, tank farm oil transfer lines
Circulating Cooling Water Main Pipelines
Advantages: Smooth inner wall of EFW process (Ra≤3.2μm), reducing scale buildup
Example: Refinery cooling tower inlet and outlet water pipes (Φ406×9.5mm)
2. Energy and Power Systems
Medium and Low Pressure Steam Network
Cool Power Plant Condensate Recovery Pipelines (Pressure ≤4.1 MPa, Temperature ≤200℃)
District Heating Secondary Network Hot Water Pipelines (90-150℃)
Gas Turbine Auxiliary Systems
Waste Heat Boiler Makeup Water Pipelines (CL22 spot checks ensure welding reliability)
3. Industrial Fluid Transportation
Cryogenic Media Piping
Liquid nitrogen/liquid oxygen transmission in air separation units (-196℃ operating conditions, Gr.B60 low-temperature toughness meets standards)
Food and Pharmaceutical Cleanroom Piping
Pure steam system (EFW inner wall electrolytically polished to SIP cleanliness standards)
4. Infrastructure
District Heating Main Pipeline
Underground direct-buried hot water pipeline network (external 3PE anti-corrosion layer + polyurethane insulation)
Typical specifications: Φ508×12.7mm, design pressure 2.5 MPa
Test and inspection
Packaging and shipping
