As a leading global supplier of stainless steel pipes, GNEE's ASTM-A554 certified pipes strictly follow the ASTM A554 standard and use automatic welding technology (TIG or laser welding) to ensure that the weld quality is consistent with the parent material. They are suitable for scenarios with strict requirements on corrosion resistance, mechanical strength and appearance.
Full grade coverage:
Austenitic stainless steel (304, 316L, 321H): strong corrosion resistance, suitable for coastal buildings and food processing equipment.
Ferritic stainless steel (430, 439): low cost, oxidation resistance, suitable for solar brackets and low-temperature pipelines.
Duplex stainless steel (2205, 2507): high strength and stress corrosion resistance, used in chemical equipment.
Customization capabilities:
Flexible size: outer diameter 5.0-1219.2mm, wall thickness 0.5-20mm, support round, square, rectangular and non-standard shapes.
Surface treatment: polishing (No.4/8K), pickling passivation, coating (polyurethane/fluorocarbon), to meet the needs of architectural decoration and industrial corrosion protection.
Compliance and certification:
International certification: passed the ASTM A262 E method intergranular corrosion test to ensure intergranular corrosion resistance after welding.
| Application Areas | Recommended Grades | Key Properties | GNEE Technical Support |
|---|---|---|---|
| Coastal Construction | 316L / 2205 | Chloride ion resistance (Cl⁻ ≤ 1000ppm), salt spray resistance | Provide salt spray corrosion test report (ASTM B117) |
| Automotive Exhaust Systems | 321H / 409L | High-temperature resistance (long-term ≤850℃), thermal shock resistance | Custom bend processing (e.g., U-shaped, S-shaped) |
| Solar Energy Facilities | 430 / 304L | Oxidation resistance, cost-effective, suitable for PV and collector pipes | Laser cutting and stamping forming services |
| Food Processing Equipment | 316L / 317L | Acid/alkali resistance, compliant with FDA hygiene standards | Inner wall polishing (Ra ≤ 0.8μm) |
| Chemical Reactors | 2507 / 904L | Super duplex steel, strong corrosion and stress corrosion cracking resistance | Provide ASME-certified pipes |
Logistics and delivery: Achieve 7-15 days of urgent delivery and support small batch trial orders.
Inventory support: 50,000 tons of spot reserves, covering common specifications, to avoid project delay risks.
Welding guidance: Match welding wire (such as ER347) with process parameters (current ≤150A, interlayer temperature ≤150℃) to ensure weld quality.
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