ASTM A671 CC65 Pipe Carbon Steel — Factory Direct Supplier
ASTM A671 CC65 is an electric-fusion-welded (EFW) carbon steel pipe made from plate, designed for atmospheric and lower-temperature pressure service. The “CC65” designation indicates Class CC (electric-fusion-welded, radiographed) with a 65 ksi (450 MPa) tensile strength grade plate. A671 pipe is widely used in power plant, refinery, and industrial piping systems where large-diameter welded pipe with full weld seam inspection is required.
Huaxia-Steel supplies ASTM A671 CC65 EFW pipe in sizes from 16 inch to 100 inch diameter, with wall thicknesses from 6 mm to 50 mm, in Classes 10 through 70 (weld seam examination levels).
Product Overview
| Parameter | Specification |
|---|---|
| Standard | ASTM A671/A671M |
| Grade | CC65 (Class CC, Grade 65) |
| Manufacturing method | Electric fusion welded (EFW), made from plate |
| Plate source material | ASTM A516 Grade 65 or equivalent |
| Tensile strength, min | 450 MPa (65 ksi) |
| Yield strength, min | 260 MPa (38 ksi) |
| Size range | 16 inch to 100 inch (DN400 to DN2500) |
| Wall thickness | 6.0 mm to 50.0 mm |
| Length | Up to 12,000 mm (random or fixed length) |
| End type | Beveled (for butt-welding), plain, or flanged |
| Pressure rating | Per ASME B31.1/B31.3 calculation |
Dimensional Specifications
| NPS (inch) | OD (mm) | Wall thickness range (mm) | Weight range (kg/m) |
|---|---|---|---|
| 16 | 406.4 | 6.35-25.4 | 62.7-244.5 |
| 20 | 508.0 | 7.92-30.0 | 97.5-362.3 |
| 24 | 610.0 | 9.53-30.0 | 141.4-437.3 |
| 30 | 762.0 | 9.53-38.0 | 177.0-685.0 |
| 36 | 914.0 | 12.7-40.0 | 282.0-875.4 |
| 42 | 1067.0 | 12.7-45.0 | 330.0-1145.0 |
| 48 | 1219.0 | 12.7-50.0 | 378.0-1456.0 |
| 60 | 1524.0 | 16.0-50.0 | 595.0-1825.0 |
Class Designations (Weld Seam Examination)
ASTM A671 defines weld seam examination classes. Higher class numbers require more stringent NDE:
| Class | NDE requirement | Typical application |
|---|---|---|
| Class 10 | Visual only | Non-critical, low pressure |
| Class 11 | Spot RT | General service |
| Class 12 | 10% RT | General service |
| Class 13 | 100% RT | Critical service |
| Class 20 | Spot UT | General service |
| Class 22 | 100% UT | Critical service |
| Class 30 | Spot RT + UT | Critical, higher pressure |
| Class 33 | 100% RT + UT | Most critical, highest pressure |
CC65 is most commonly supplied in Class 12 or Class 22, depending on the service requirements. For ASME B31.1 power piping, Class 12 or higher is typically required.
Chemical Composition (Plate Material)
| Element | Max % | Notes |
|---|---|---|
| C | 0.26 | Carbon, moderate for weldability |
| Mn | 0.85-1.20 | Manganese for strength |
| P | 0.035 | Phosphorus, limited |
| S | 0.035 | Sulfur, limited |
| Si | 0.15-0.40 | Silicon, killed steel |
Manufacturing Standards
- ASTM A671/A671M: Specification for electric-fusion-welded steel pipe for atmospheric and lower temperatures
- ASTM A516/A516M: Pressure vessel plate source material (Grade 65)
- ASME B31.1: Power piping code
- ASME B31.3: Process piping code
- Welding: SAW (submerged arc welding) for longitudinal seam; weld procedure per ASME Section IX
- Post-weld heat treatment (PWHT): Required for wall thickness over 19 mm (Class 70) or as specified by code
Applications
- Power plant piping: Main steam, feedwater, and blowdown lines
- Refinery piping: Process lines, utility piping
- Water treatment plants: Large-diameter water transmission mains
- Industrial piping: Compressed air, cooling water, fire protection
- Structural applications: Pipe piling, casing for bored tunnels
- District heating: Large-diameter insulated piping systems
Quality Assurance
- 100% hydrostatic testing at minimum 1.25 times design pressure (or per code)
- RT examination of weld seam (Class 12: 10 percent, Class 13: 100 percent)
- UT examination available (Classes 20, 22, 30, 33)
- Magnetic particle inspection of weld ends
- Charpy V-notch impact testing at design temperature (supplementary requirement S4)
- EN 10204 3.1 MTC with chemistry, tensile, and impact results
- Traceability: heat number on pipe body and MTC
Packaging and Shipping
- End protection: plastic or steel end caps
- External coating: black varnish or primer (standard), FBE or 3LPE (optional)
- Bundling: individual pipes on timber bearers for large diameters
- Marking: size, grade, class, heat number, manufacturer per ASTM A671
- Transport: truck, rail, or barge for large-diameter pipe
- Container loading: 20ft/40ft for pipe up to 12m length; break-bulk for OD over 40 inch
Why Choose Huaxia-Steel?
- EFW pipe production capacity up to 100 inch (2540 mm) diameter
- SAW welding with automated seam tracking
- Full NDE capability: RT, UT, MT, PT
- EN 10204 3.1 MTC included; 3.2 with third-party witnessing available
- PWHT capability for thick-wall pipe
- Coating options: FBE, 3LPE, coal tar enamel
- Experienced in power plant and refinery piping projects
FAQ
What is the difference between ASTM A671 and A672?
ASTM A671 is for atmospheric and lower-temperature service, made from pressure vessel quality plate (A516). ASTM A672 is for moderate-temperature service, also made from pressure vessel plate but with different grade options. Both are EFW pipe, but the temperature service and plate grade differ.
What does CC65 mean?
“CC” indicates electric-fusion-welded with the weld seam examined (Class CC). “65” indicates the plate has a minimum tensile strength of 65 ksi (450 MPa). The full designation is ASTM A671 Grade CC65.
Can A671 CC65 pipe be used for high-temperature service?
No. A671 is designed for atmospheric and lower-temperature service. For high-temperature service (above 400 degrees C), use ASTM A672, A691, or seamless pipe per ASTM A335 (alloy steel) or A106 (carbon steel).
Get a Quote
Contact Huaxia-Steel for ASTM A671 CC65 EFW pipe with factory-direct pricing, full NDE testing, and worldwide shipping. Send your diameter, wall thickness, class, and quantity for a detailed quotation within 24 hours.
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