ASTM A672 Grade C65 is a specification that outlines the requirements for electric-fusion-welded (EFW) carbon steel pipes, particularly designed to serve in high-pressure applications at moderate to lower temperatures. These pipes are manufactured using the Longitudinal Submerged Arc Welding (LSAW) technique, resulting in a robust and reliable product. With an emphasis on achieving a balance between mechanical strength and corrosion resistance, A672 C65 pipes are widely used across industries such as oil and gas, petrochemicals, and power generation, where performance under demanding conditions is crucial.
The ASTM A672 C65 carbon steel EFW pipes, crafted through the LSAW process, exhibit commendable tensile and yield strengths, making them well-suited for the transport of fluids and gases under substantial pressure. The longitudinal edges of the steel plates are fused together using submerged arc welding, creating a seamless and strong joint. The Grade C65 designation signifies a minimum yield strength of 65,000 psi, indicating the pipes' capability to endure high internal pressures without compromising structural integrity.
Moreover, the LSAW manufacturing technique ensures uniform dimensions and wall thickness throughout the length of the A672 C65 pipes, making them suitable for applications demanding precise tolerances. These pipes are selected for projects that require durable and cost-effective piping solutions, capable of withstanding varying operational conditions. In summary, ASTM A672 Grade C65 carbon steel EFW pipes, produced using the LSAW process, provide a sturdy and dependable choice for industries seeking resilient and high-pressure piping solutions that can perform consistently across different environments.
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Specification:
Sizes (Seamless): Not applicable (EFW pipes, not seamless).
Sizes (ERW) : Not applicable (EFW pipes, not ERW).
Sizes (SAW/EFW) : 16" to 100" nominal diameter (NPS 16 to NPS 100).
Wall Thickness : Up to 2" (50.8 mm).
Length : Available in single random length (SRL) and double random length (DRL), with options for specific cut lengths.
Chemical Properties of astm a672 c65 carbon steel efw pipes lsaw
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Copper (Cu) | Nitrogen (N) | Aluminum (Al) | Titanium (Ti) |
| Composition (%) | 0.24 max | 0.79-1.30 | 0.025 max | 0.025 max | 0.13-0.45 | 0.25 max | 0.25 max | 0.08 max | 0.02 max | 0.35 max | 0.012 max | 0.02 max | 0.02 max |
Mechanical Properties of astm a672 c65 carbon steel efw pipes lsaw
| Property | Tensile Strength | Yield Strength | Elongation in 2" | Charpy V-Notch Impact Test | Hardness (Brinell) |
| Value | 65,000 psi (450 MPa) min | 37,000 psi (250 MPa) min | 22% min | -50°F (-46°C) avg. energy 20 ft-lbs (27 J) min | 170 max (for plate) |
Advantages of astm a672 c65 carbon steel efw pipes lsaw:
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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