ASME SA213 TP304H A213 304H Stainless Steel Tubes

Guanyu Tube is specialized manufacturer of ASME SA213 TP304H Stainless steel tubes.

Material Composition: Austenitic stainless steel with high chromium (18–20%) and nickel (8–11%) content, enhanced by a controlled carbon content (0.04–0.10%) for improved high-temperature strength.

Composition ranges for ASME SA 213 304H

ASME SA213 TP304H Stainless Steel Tubes Mechanical properties

1. High-Temperature Performance: Designed for elevated-temperature service (up to ~815°C/1500°F), offering excellent creep resistance and oxidation resistance.
2. Corrosion Resistance: Resists oxidation, scaling, and general corrosion in oxidizing and mildly reducing environments.
3. Manufacturing Standards: Seamless pipe produced via cold/hot working, complying with ASME Boiler and Pressure Vessel Code for precise mechanical properties.
4. Heat Treatment: Solution-annealed to dissolve carbides and ensure optimal microstructure stability.

Typical Applications

• Power Generation: Superheaters, reheaters, and heat exchangers in boilers for coal-fired, nuclear, or thermal power plants.
• Petrochemical Industry: High-temperature piping systems in refineries, chemical reactors, and catalytic cracking units.
• Heat Processing Equipment: Furnace tubes, radiant coils, and components exposed to cyclic thermal stress.
• Oil & Gas: Components in steam methane reformers and other high-pressure, high-temperature (HPHT) systems.

Usage Considerations

1. Temperature Limits:
   • Avoid prolonged exposure to 425–860°C (800–1580°F) to prevent carbide precipitation (sensitization), which reduces corrosion resistance. Post-weld annealing may be required.
2. Welding Practices:
   • Use low-carbon filler materials (e.g., ER308L) to minimize sensitization.
   • Follow ASME Section IX procedures; ensure inert gas shielding (TIG/MIG) to prevent contamination.
3. Mechanical Stress:
   • Avoid excessive mechanical deformation during installation; support pipes properly to mitigate thermal expansion stress.
4. Corrosion Risks:
   • Not suitable for chloride-rich environments (risk of pitting/crevice corrosion).
   • Regular inspections for oxidation scaling, especially in cyclic thermal conditions.
5. Cleaning & Maintenance:
   • Use chloride-free cleaning agents; avoid abrasive tools that may damage the passive oxide layer.

Standards Compliance

• Meets ASME SA213 specifications for seamless ferritic and austenitic alloy-steel boiler tubes.
• Certifications include mill test reports (MTRs) for chemical composition, mechanical testing, and hydrostatic pressure validation.