Product Description
ASTM A213 TP310S Weld Stainless Steel Pipe Specification
1. Standard Basis
The ASTM A213 is a standard that primarily pertains to seamless ferritic and austenitic alloy - steel tubes for boiler, superheater, and heat exchanger applications. For welded stainless - steel pipes, while the direct reference is ASTM A312, the material grade TP310S in the context of welded pipes often adheres to similar quality and performance standards as those set within the ASTM framework.
2. Material Grade and Designation
The material grade is TP310S, with its Unified Numbering System (UNS) designation being S31008. It is an austenitic stainless steel, known for its enhanced properties in high - temperature and corrosive environments.
3. Key Material Properties
3.1 High - Temperature Performance
TP310S exhibits excellent high - temperature strength. It can maintain its structural integrity and mechanical properties even at elevated temperatures, making it suitable for applications where exposure to high heat is frequent. This high - temperature resistance is attributed to its specific chemical composition, particularly the high chromium and nickel content.
3.2 Corrosion Resistance
Thanks to its chromium content, which forms a passive oxide layer on the surface of the steel, TP310S offers remarkable corrosion resistance. It can withstand a variety of corrosive media, including oxidation in high - temperature environments, as well as resistance to certain chemical attacks. This makes it ideal for use in industries where both heat and corrosion are concerns.
4. Chemical Composition
|
Element
|
Content Range (%)
|
|
Carbon (C)
|
≤0.08
|
|
Chromium (Cr)
|
24.0 - 26.0
|
|
Nickel (Ni)
|
19.0 - 22.0
|
|
Manganese (Mn)
|
≤2.0
|
|
Silicon (Si)
|
≤1.5
|
|
Phosphorus (P)
|
≤0.045
|
|
Sulfur (S)
|
≤0.030
|
The low carbon content in TP310S (≤0.08%) is crucial as it improves the material's weldability. High chromium and nickel levels contribute to its high - temperature and corrosion - resistant properties.
| Category |
Details |
| Standard |
ASTM A213 / ASME SA213 |
| Material Type |
Austenitic Stainless Steel (UNS S31000) |
| Chemical Composition |
C ≤0.25%, Cr 24-26%, Ni 19-22%, etc. |
| Mechanical Properties |
Tensile ≥515 MPa, Yield ≥205 MPa, Elongation ≥35% |
| Applications |
High-temperature boilers, furnace parts, chemical reactors |
5. Mechanical Properties
|
Property
|
Value
|
|
Tensile Strength
|
≥515 MPa
|
|
Yield Strength (0.2% offset)
|
≥205 MPa
|
|
Elongation at Break (in 50mm gauge length)
|
≥35%
|
|
Hardness
|
Typically ≤217 HBW
|
These mechanical properties ensure that the TP310S welded stainless - steel pipes can endure the mechanical stresses and strains during installation, operation, and various service conditions.
6. Dimensions and Tolerances
6.1 Diameter
The outer diameter of the welded pipes can vary depending on the application requirements. Common sizes range from small diameters suitable for heat exchangers to larger diameters for industrial pipelines. The diameter tolerances are strictly controlled to ensure proper fit - up and connection with other components. For example, for standard - sized pipes, the tolerance on the outer diameter may be within ±0.5% of the nominal diameter.
6.2 Wall Thickness
The wall thickness also varies according to the pressure and temperature requirements of the application. Thicker walls are used for high - pressure and high - temperature applications. The tolerance on the wall thickness is typically within ±10% of the nominal wall thickness.
6.3 Length
The pipes are usually supplied in standard lengths, such as 6 meters or 12 meters. However, custom lengths can also be provided according to customer requests.
7. Applications
- High - Temperature Boilers: In power generation plants, TP310S welded pipes are used in the construction of high - temperature boilers due to their ability to withstand extreme heat and maintain structural stability.
- Furnace Components: They are used in industrial furnaces, where they are exposed to high temperatures and corrosive gases during the heating and melting processes.
- Petrochemical Reactors: In the petrochemical industry, these pipes are employed in reactors and other equipment that handle corrosive chemicals and operate at high temperatures and pressures.
- Heat Exchangers: TP310S welded pipes are suitable for heat exchangers in various industries, as they can efficiently transfer heat while resisting corrosion and maintaining their mechanical properties.
8. Welding and Fabrication
TP310S is relatively easy to weld due to its low carbon content. However, proper welding procedures need to be followed to ensure the integrity of the welded joints. Pre - heating and post - welding heat treatment may be required depending on the thickness of the pipe and the specific application requirements. The welding process should be carried out by trained professionals using appropriate welding consumables that match the chemical composition of the base metal.
9. Quality Control and Testing
- Visual Inspection: All pipes are visually inspected for surface defects such as cracks, pits, and scratches.
- Non - Destructive Testing (NDT): Techniques like ultrasonic testing (UT), radiographic testing (RT), and magnetic particle testing (MT) are used to detect internal and surface - breaking defects.
- Mechanical Testing: Samples are taken from the pipes to conduct tensile, yield, and elongation tests to verify the mechanical properties.
- Chemical Analysis: Regular chemical analysis is performed to ensure that the chemical composition of the pipes meets the specified requirements.
Detailed Photos
Processing of Production
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