ASTM A358 Class 1 TP316L Stainless Steel EFW Pipe For High Temperature Service
Brand Name:YUHONG
Certification:ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:ASTM A358 Class 1 TP316L Stainless Steel Welded Pipe
Minimum Order Quantity:1000kgs
Payment Terms:L/C,T/T
Place of Origin:CHINA
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ASTM A312 CL.1 TP316L Stainless Steel Welded Pipe EFW Pipe
ASTM A358 is a standard specification for electric-fusion-welded austenitic stainless steel pipe intended for high-temperature service. ASTM A358 this specification covers five class: class 1, class 2, class 3, class 4, class 5. Each class intended for specific applications and conditions, particularly concerning temperature capabilities and welding methods. For example, class 1 refers specifically to the pipe made from austenitic stainless steel, such as TP316L, which has excellent corrosion resistance and is often used in challenging environments. And pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
Manufacturing Process
Material Preparation:
- Stainless steel is sourced and cut to the required dimensions.
Electric Fusion Welding (EFW):
- This process involves the use of electric current to create a weld joint between the pipe sections. The edges of the pipe are melted and fused together, providing a strong and durable seam.
Heat Treatment:
- Post-weld heat treatment is often performed to relieve residual stresses and improve corrosion resistance.
Testing:
- Non-Destructive Testing (NDT): Includes methods like radiographic testing (RT), ultrasonic testing (UT), and magnetic particle testing (MT) to ensure the integrity of the welds and material.
- Hydrostatic Testing: Usually performed to verify the pressure capabilities of the pipe, ensuring no leaks occur under specified pressure conditions.
ASTM A358 Stainless Steel Pipe chemical composition
| Material | |||||||||||
| C | Mn | P | S | Si | Cr | Ni | Mo | N B | Nb | Ti | |
| A358 TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | … | … | … | … |
| A358 TP304L | 0.035 D | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-13.0 | … | … | … | … |
| A358 TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 11.0-14.0 | 2.00-3.00 | … | … | … |
| A358 TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | … | … | … |
| A358 TP316Ti | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | 0.10 | … | 5x(C+N)-0.70 |
ASTM A358 Welded Pipe thickness tolerance
| Specification | Allowable OD in mm | Allowable Wall Thickness Variation | Exact Length Tolerance in mm | Testing Requirement | ||||
|---|---|---|---|---|---|---|---|---|
| Nominal Dia | Over | Under | % Over | %Under | Over | Under | ||
| ASTM-A312 Seemless & Welded pipe | 3.175-38.1 incl | .4 | .79 | Minimum Wall 12.5% under nominal wall Specified | 6.4 0 | 0 | Tension Test | |
| 38.1-1016 incl | .79 | .79 | 6.4 0 | 0 | Flattening Test | |||
| 101.6-203.2 imcl | 1.59 | .79 | 6.4 0 | 0 | 100% Hydrostatic Test | |||
| (Normally Random Lengths ordered | Refer to ASTM A-530 | |||||||
| ASTM A358 EFW/ Welded pipe | 219.08-750mm or 0.01 inch | +0.5% | -0.3 | 6.0 | Refer to ASTM A-530 | |||
Advantages
- High Strength: EFW pipes have good mechanical strength, making them suitable for high-pressure applications.
- Corrosion Resistance: TP316L provides excellent resistance to various aggressive environments, extending the lifespan of the piping system.
- Cost-Effective: EFW pipes tend to have lower production costs compared to other welding techniques (like seamless fabrication), while still offering high performance.
- Weldability: The alloy's properties make it easy to weld, which is beneficial for complex piping systems.
Applications
- Chemical Processing: Used in the construction of transfer piping, vessels, and reactors due to its corrosion resistance.
- Oil and Gas: Employed in pipelines and fittings, especially in offshore environments.
- Pharmaceutical Industry: Used in processes requiring high cleanliness levels and resistance to corrosion.
- Power Plants: Suitable for high-temperature applications in power generation.
ASTM A358 Class 1 TP316L Stainless Steel EFW Pipe For High Temperature Service
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