Products Description
Our Advantages
1. Corrosion Resistance
- A778 Pipe is manufactured using austenitic stainless steel such as TP304/TP304L/TP316L, offering resistance to atmospheric corrosion and mild industrial corrosion, ensuring a long service life in both indoor and outdoor decorative applications.
- The pipes are tested using a spectrometer to ensure the applicable materials comply with ASTM A778 standards.
2. High Economic Efficiency
- Our pipes are manufactured using straight seam welding without annealing, making them significantly more economical than seamless or annealed pipes. Suitable for construction, infrastructure, and other applications, reducing production costs.
- Our pipes are polished for easy cutting and welding, reducing manufacturing and installation costs.
3. Surface Quality
- A778 Pipe undergoes pickling, passivation, and polishing to enhance corrosion resistance and achieve a high surface smoothness (Ra≤0.4μm), making it ideal for construction, furniture, and interior design.
- The pipes undergo rigorous dimensional and roughness testing to ensure surface quality meets customer requirements; roughness grades can be customized to project specifications.
4. Weld Quality
- We use ERW welding technology to ensure a smooth, flat weld surface and uniform appearance, without affecting the aesthetic appeal.
- The pipes undergo mechanical property testing to ensure their tensile strength and ductility are suitable for structural and decorative applications.
application areas
- Structural supports and framing
- Building columns, handrails and balustrades
- Building facades and curtain wall systems
- Furniture framing and display systems
- Interior and exterior finishing piping
- Equipment brackets and non-pressure-bearing enclosures
Chemical Composition
| Element | C | Cr | Ni | Mo | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|
| TP304 | ≤ 0.08 | 18.0 – 20.0 | 8.0 – 10.5 | - | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.030 |
| TP317L | ≤ 0.03 | 18.0 – 20.0 | 11.0 – 15.0 | 3.0 – 4.0 | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.030 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| TP304 | ≥ 485 | ≥ 205 | ≥ 30 | ≤ 95 HRB |
| TP317L | ≥ 515 | ≥ 205 | ≥ 30 | ≤ 95 HRB |
Possible Alternative Grades
| Alternative Grades | Reasons |
| ASTM A554 | ASTM A554 tubing is suitable for structural and decorative applications that do not require pressure resistance. |
| ASTM A312 | ASTM A312 piping is suitable for applications requiring compliance with pressure piping codes. |
| ASTM A269 | ASTM A269 tubing is suitable for general purpose and instrumentation applications. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What applications are ASTM A778 pipes suitable for?
A: These pipes are suitable for structural support and non-pressure decorative applications, such as handrails, guardrails, furniture, interior decorative piping, and unpressurized industrial supports.
Q: Can A778 pipes be welded or machined in the field?
A: Yes, these pipes have excellent weldability. They can be cut, bent, polished, or flared without affecting performance.
Q: Can you provide custom sizes or packaging?
A: Yes, we offer flexible customization services, including pipe outer diameter, wall thickness, and length; pickling, passivation, or polishing surface treatments; and packaging such as wooden crates, PVC wrapping film, and rust prevention treatments.
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