ASTM A358 TP321H EFW Stainless Steel Pipes
Technique：Cold Rolled
Material：Stainless Steel
Section Shape
Welding：ERW, Efw
Surface：Mechanically Polished
Od：6.0-200mm
Thickness：0.3-20 mm
Length：6000mm or as Customzied
ASTM A358 TP321H Stainless Steel EFW Pipes introduction
ASME SA358 321H stainless steel electric fusion welded pipe is a high-performance austenitic stainless steel pipe designed for high temperature, high pressure and corrosive environment. By adding titanium to the chromium-nickel base alloy, a titanium stabilized structure is formed, which effectively suppresses the risk of intergranular corrosion in the heat-affected zone of welding, and can pass the rigorous intergranular corrosion test (such as ASTM A262 E method) without post-weld heat treatment.
ASTM A358 TP321H EFW Pipes
Advantages of ASTM A358 TP321H EFW Round Pipe
ASTM A358 SS 321H EFW Pipes supports Class 1 inspection standards (such as 100% radiography or ultrasonic testing), ensuring that double-sided welds are defect-free (≥2% wall thickness defect accurate identification), and is suitable for nuclear grade, high pressure and other scenes with extremely high welding quality requirements. Covering key equipment such as boiler superheaters, heat exchangers, condensers, catalytic cracking units and cracking furnace tubes. With its resistance to intergranular corrosion, high temperature creep resistance and reliable welding performance, it has become the preferred material to ensure the long-term safe operation of the system.
Reasons to choose GNEE
1.SGS and ISO9001 certified.
2.Extra long time industry experience
3.Management system - in-house software
4.Finished goods inventory-over 450 tonnes.
5.Raw material inventory-over 700 tonnes.
We have stable supply, fast delivery and responsible after-sales service, so our products are widely praised.
EFW Stainless Steel 321H Pipe Specification
ASTM A358 Grade 321H Stainless Steel EFW Pipes Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
| 321 | min. max |
- 0.08 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 12.0 |
0.10 | Ti=5(C+N) 0.70 |
ASTM A358 Grade 321H EFW Pipe Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 321H | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | ||
ASTM A358 SS 321H EFW Pipe Tolerances
| NPS Designator | Permissible Variations in Outside Diameter | |
|---|---|---|
| Over In. | Under In. | |
| 1/8 to 1-1/2, incl | 1/64 (0.015) | 1/32 (0.031) |
| Over 1-1/2 to 4, incl | 1/32 (0.031) | 1/32 (0.031) |
China ASTM A358 Welded Pipe Manufacturer
Customer visit
Testing of electric fusion welded pipes
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