ASTM A672 Electric Fusion Welded Steel Pipe
ASTM A672 Carbon Steel Pipe Manufacturer
Huayang Steel Pipe manufactures ASTM A672 electric fusion welded steel pipes for moderate-temperature pressure service in accordance with ASTM A672/A672M.
ASTM A672 covers electric-fusion-welded steel pipes manufactured from pressure vessel quality carbon steel plates. These pipes are designed for applications requiring reliable mechanical performance under moderate-temperature and pressure conditions, making them suitable for power generation, petrochemical plants, refineries, water transmission systems, and industrial processing facilities.
With advanced JCOE, RBE forming technology and double-sided submerged arc welding production lines, Huayang supplies large-diameter ASTM A672 steel pipes with excellent weld integrity, dimensional accuracy, and comprehensive quality assurance.
ASTM A672 Steel Pipe Classification
ASTM A672 classifies products according to heat treatment condition and inspection requirements.
| Class | Heat Treatment | Radiographic Examination | Hydrostatic Test |
|---|---|---|---|
| Class 10 | As Welded | Optional | Required |
| Class 11 | As Welded | Optional | Not Required |
| Class 12 | As Welded | Required | Required |
| Class 13 | As Welded | Required | Not Required |
| Class 20 | Stress Relieved | Optional | Required |
| Class 21 | Stress Relieved | Optional | Not Required |
| Class 22 | Stress Relieved | Required | Required |
| Class 23 | Stress Relieved | Required | Not Required |
| Class 30 | Normalized | Optional | Required |
| Class 32 | Normalized | Required | Required |
ASTM A672 Available Materials
Huayang manufactures ASTM A672 steel pipes using pressure vessel quality carbon steel plates.
| Plate Material | Description |
|---|---|
| ASTM A516 Grade 60 | Pressure vessel carbon steel |
| ASTM A516 Grade 65 | Medium strength pressure steel |
| ASTM A516 Grade 70 | High-strength pressure steel |
| ASTM A285 Grade C | General pressure service |
Size and Manufacturing Process of ASTM A672 Pipe
| Product Type | Manufacturing Process | Outside Diameter | Wall Thickness | Length |
|---|---|---|---|---|
| ASTM A672 LSAW Pipe | Double-Sided Submerged Arc Welding | Φ406.4–Φ2800 mm | 7–50 mm | 6–12.5 m |
| Large Diameter Pressure Pipe | RBE Forming + SAW | Up to Φ2800 mm | Up to 50 mm | Customized |
ASTM A672 Steel Pipe Specification
| Item | Specification |
|---|---|
| Standard | ASTM A672 / ASTM A672M |
| Product Type | Electric Fusion Welded Steel Pipe |
| Manufacturing Process | SAW (Double-Sided Submerged Arc Welding) |
| Base Material | Pressure Vessel Steel Plate |
| Outside Diameter | Φ406.4–Φ2800 mm |
| Wall Thickness | 7–50 mm |
| Length | 6–12.5 m |
| Pipe End | Plain End / Beveled End |
ASTM A672 Mechanical Properties
Mechanical properties depend on the selected pressure vessel plate.
Typical properties for ASTM A516 Grade 70 are shown below.
| Property | Requirement |
|---|---|
| Tensile Strength | 485–620 MPa |
| Yield Strength | ≥260 MPa |
| Elongation | ≥17% |
ASTM A672 Welding Requirements
ASTM A672 requires strict control of welding quality throughout production.
| Requirement | Description |
|---|---|
| Welding Process | Electric Fusion Welding |
| Weld Type | Longitudinal Double-Sided SAW |
| Welding Procedure | Qualified WPS/PQR |
| Welder Qualification | Certified Operators |
| Weld Appearance | Smooth, Uniform, No Harmful Defects |
ASTM A672 Inspection Requirements
Every production stage is controlled through comprehensive inspection procedures.
| Inspection Item | Test Method |
|---|---|
| Chemical Analysis | Spectrometer |
| Tensile Test | ASTM Mechanical Test |
| Weld Examination | Visual Inspection |
| Ultrasonic Testing | UT |
| Radiographic Testing | RT When Required |
| Hydrostatic Test | According to Class Requirement |
| Dimensional Inspection | Diameter, Wall Thickness, Length |
| Surface Inspection |
Visual Examination
|
ASTM A672 Heat Treatment
Depending on the specified class, ASTM A672 pipes may undergo different heat treatment processes.
| Heat Treatment | Purpose |
|---|---|
| As Welded | Standard production |
| Stress Relieved | Reduce welding residual stress |
| Normalized | Improve toughness and uniformity |
Surface Protection and Value-Added Services
Huayang provides complete downstream processing services for ASTM A672 steel pipes.
| Service | Capability |
|---|---|
| FBE Coating | Available |
| 2PE / 3PE Coating | Available |
| 2PP / 3PP Coating | Available |
| Internal Epoxy Coating | Available |
| Pipe Expansion | Available |
| Beveling | Available |
| Cutting to Length | Available |
| Hydrostatic Testing | Available |
Anti-Corrosion Processing Capacity
| Item | Production Range |
|---|---|
| Outside Diameter | Φ159–Φ1626 mm |
| Wall Thickness | 4–40 mm |
| Length | 8–16 m |
Applications of ASTM A672 Steel Pipe
ASTM A672 steel pipes are widely used in:
- Power generation plants
- Petrochemical facilities
- Oil refineries
- Industrial pressure piping
- Water transmission systems
- District heating pipelines
- Chemical processing plants
- Energy infrastructure projects
Large-diameter ASTM A672 pipes manufactured by Huayang combine high structural strength, reliable weld quality, and strict inspection standards, making them suitable for demanding pressure service applications.
Why Choose Huayang ASTM A672 Steel Pipe
| Advantage | Description |
|---|---|
| Manufacturing Range | Φ406.4–Φ2800 mm |
| Wall Thickness | 7–50 mm |
| Maximum Length | 12.5 m |
| Forming Technology | JCOE & RBE |
| Welding Process | Double-Sided SAW |
| Inspection | UT, RT, Hydrostatic Test |
| Additional Services | Coating, Pipe Expansion, Deep Processing |
| Custom Manufacturing | Available According to Project Requirements |
