ASME SA312 TP304 / 304L stainless steel high temperature pipe
ASME SA312 TP304 / 304L stainless steel high temperature pipe
ASME SA312 TP304/304L is the standard specification for high-temperature austenitic stainless steel pipe. TP304L offers lower carbon advantages over standard TP304, such as improved weldability and lower corrosion resistance in welded joints. Available in both seamless and welded versions, these pipes are versatile and durable, serving as a mainstay in many industrial applications due to their excellent heat and corrosion resistance in high-temperature environments such as power plants and heat exchangers.
What are the specifications for ASTM A312 TP304L?
ASTM A312 TP 304/304L stainless steel pipe is the most widely used and commonly used stainless steel on the market. These grades of stainless steel are austenitic chromium alloys, also known as "18/8" stainless steel because of their composition of 18% chromium and 8% nickel.
ASME SA312 TP304/TP304L Chemical Requirements
| Grade | UNS Designation | Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel |
| TP304 | S30400 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18.0 - 20.0 | 8.0 - 11.0 |
| TP304L | S30403 | 0.035 | 2 | 0.045 | 0.03 | 1 | 18.0 - 20.0 | 8.0 - 13.0 |
ASME SA312 TP304/TP304L Tensile Requirements
| Grade | UNS Designation | Tensile Strength | Yield, min | ||
| ksi | MPa | ksi | MPa | ||
| TP304 | S30400 | 75 | 515 | 30 | 205 |
| TP304L | S30403 | 75 | 515 | 24 | 170 |
Pipe and Filler Metal Specification
| Grade | UNS Designation | Filler Metal (AWS A5.9 Class) | UNS Designation(Filler Metal) |
| TP304 | S30400 | ER308 | S30800, W30840 |
| TP304L | S30403 | ER308L | S30883, W30843 |
ASME SA312 TP304/TP304L Annealing Requirements
| Grade | UNS Designation | Heat Treating Temperature | Cooling/Testing Requirements |
| TP304 | S30400 | 1900 °F [1040 °C] | water or other rapid cool |
| TP304L | S30403 | 1900 °F [1040 °C] | water or other rapid cool |
Why choose 304L steel for high-temperature applications?
Low Carbon Content: TP304L's low carbon content minimizes carbide precipitation during welding, preventing intergranular corrosion in the weld zone and making it ideal for large-area welding applications.
Corrosion and Heat Resistance: Both grades offer excellent resistance to general corrosion and can operate effectively in high-temperature environments.
Versatility: They are suitable for a wide range of applications, including power plants, chemical processing, and furnace components.
Advantages of ASME SA312 TP304/304L Piping
Structural Integrity: These pipes are strong and durable, available in various wall thicknesses and wall thickness grades (such as 40-gauge wall thickness) to meet varying pressure and temperature requirements.
Ease of Fabrication: Both grades offer excellent welding characteristics, but TP304L is better suited for applications requiring high-strength welds.
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 boxes/crates: Pipes are typically packaged in wooden boxes 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
