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What is ASTM A928 Pipe?
ASTM A928 covers electric-fusion-welded (EFW) steel pipes made from duplex and super duplex stainless steels.
Key features:
- Manufactured using electric fusion welding (EFW)
- Suitable for high-pressure and corrosive environments
- Commonly used for large diameter piping systems
EFW pipes are known for:
- High strength
- Excellent corrosion resistance
- Cost-effectiveness for large sizes
ASTM A928 Specification Overview
Manufacturing Process
- Electric Fusion Welding (EFW)
- Heat treatment after welding
- Non-destructive testing required
Classes
ASTM A928 pipes are classified into different classes (Class 1–5), depending on inspection and testing requirements.
Size Range
- Large diameter pipes
- Custom thickness available
- Suitable for industrial pipelines
ASTM A928 Material Grades
| Grade | Type | Features |
|---|---|---|
| S31803 | Duplex | Good corrosion resistance |
| S32205 | Duplex (2205) | Most widely used |
| S32750 | Super Duplex | High strength & corrosion resistance |
Five Classes of ASTM A928 SS Welded Pipe
Class 1-Stainless steel EFW pipe shall be double welded by processes using filler metal in all passes and shall be radiographed completely.
Class 2-Pipe shall be double welded by processes using filler metal in all passes. No radiograph is required.
Class 3-Pipe shall be single welded by processes using filler metal in all passes and shall be radiographed completely.
Class 4-Same as Class 3, except that the weld pass exposed to the inside pipe surface is permitted to be made without the addition of filler metal.
Class 5-Pipe shall be double welded by processes using filler metal in all passes and shall be spot radiographed.
ASTM A928 vs ASTM A790
Many buyers confuse ASTM A928 with ASTM A790. Here is the key difference:
| Standard | Type | Process | Application |
|---|---|---|---|
| ASTM A928 | Welded | EFW | Large diameter pipelines |
| ASTM A790 | Seamless/Welded | Seamless or welded | General piping |
ASTM A928 is preferred for large-diameter welded pipes, while ASTM A790 is more flexible for smaller sizes.
ASTM A928 Duplex Stainless Steel EFW Pipe Heat Treatment
FAQ
Q: What is ASTM A928 pipe used for?
ASTM A928 pipes are used in high-pressure and corrosive environments such as oil & gas and offshore industries.
Q: What is the difference between ASTM A928 and ASTM A790?
ASTM A928 is mainly for EFW welded pipes, while ASTM A790 includes seamless and welded pipes.
Q: What does EFW pipe mean?
EFW stands for Electric Fusion Welded, a process used for manufacturing large diameter steel pipes.
Q: What grades are included in ASTM A928?
Common grades include S31803, S32205 (2205), and S32750 (super duplex). Learn more about ASTM A928 duplex 2205 tubing
ASTM A928 Pipe Supplier & Manufacturer
We supply ASTM A928 duplex stainless steel pipes for global industrial projects.
Our Advantages:
- Strict quality control and inspection
- Export experience to multiple countries
- Custom sizes and fast delivery
- Third-party testing available
Contact us today to get a quotation for ASTM A928 pipes.
