ASTM A249 TP304 stainless steel welded pipe for oil refining industry
ASTM A249 TP304 welded steel pipe is suitable for the oil refining industry due to its excellent corrosion resistance, high-temperature strength, and pressure system performance. Its key advantages include: composition (18% chromium, 8% nickel), ability to transport various fluid/gas types and heat transfer media, and the availability of specific surface treatments such as bright annealing for a clean, high-performance finish.
What does TP304 mean?
TP304 is an austenitic stainless steel alloy designed with a high-quality nickel-chromium alloy ratio. Conforming to the ASTM A312 standard, TP304 alloy exhibits excellent corrosion resistance and oxidation resistance under various stress environments. This versatile alloy also possesses excellent mechanical properties.
ASTM A249 TP304 Stainless Steel Welded Pipe for Refining Projects
ASTM A249 is a standard for stainless steel welded pipe. Wall thickness can be either average or minimum; customers typically choose the minimum. These pipes are suitable for applications such as boilers, superheaters, heat exchangers, or condensers.
TP304 stainless steel welded pipe Chemical Composition % Max
| C | Mn | P | S | Si | Cr |
| 0.08 | 2.00 | 0.045 | 0.03 | 1.00 | 18.0-20.0 |
ASTM A249 TP304 stainless steel welded pipe for oil refining industry Mechanical Property
| Gr. | Tensile Strength min | Yield Strength min | Elongation (%) | Rockwell Hardness Number,max |
| TP304 | 75ksi ( 515MPa ) | 30ksi ( 205MPa ) | 35 min | B90 |
Manufacturing and Surface Treatment
Welding Methods: TIG welding and plasma welding are available for manufacturing from flat rolled strip.
Surface Treatment: Optional surface treatments include bright annealing (BA), which provides a smooth, polished, and easy-to-clean surface, facilitating machining and handling. Other surface treatments include 2B, No.4, and mirror polishing.
Cold Drawing Process: Improves dimensional accuracy and surface quality.
Testing and Certification
Rigorous Testing: Tubes undergo mechanical and non-destructive testing (e.g., hydrostatic and ultrasonic testing) to ensure quality.
Certification: Material testing certificates conforming to international standards (e.g., EN 10204/3.1B or 3.1) are available.
Quality Control: Strict quality control is implemented to ensure product reliability and long-term performance.
Gnee Steel specializes in the production of a wide range of stainless steel products. Gnee Steel's product packaging includes: Steel Strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during ocean shipping, and then secured with steel strapping. Wooden Cases/Crates: Pipes are typically packaged in wooden cases or crates to protect the pipes during transportation, especially those that are longer or have larger diameters. Seaworthy Export Packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin Packaging: This prevents rain, seawater, and other external factors from penetrating the export crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in the aerospace, chemical, power, automotive, and nuclear energy sectors, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing or customized alloy material solutions, please contact us for a quote: ru@gneesteelgroup.com
