Our excellent seamless carbon steel pipe, astm a213 t9, erw tube and technical services can be compared with any well-known brands, and are not inferior. We actively promote the simultaneous upgrading of industrial development and automation and information technology to form an endogenous driving force for the development of high-end chemical and high-tech industries. Welcome to call us or visit us for guidance. Our company will serve customers with good reputation, strong strength, high-quality products and low prices.
Products Description
Product Specifications
| Standards | ASTM A358 / ASME SA358 |
| Steel Grades | 304 304L 304N 304LN 304H 309Cb 309S 310Cb 310S 316 316L 316N 316LN 316H 317 317L 321 347 347HC 348 XM-19 XM-29 |
| Equivalent Standards | DIN, JIS, GB, AISI, ISO |
| Outer Diameter (OD) | NPS 8" – 110" |
| Wall Thickness (WT) | Sch 10 – Sch 160 (≈3 mm – 100 mm) |
| Length | Up to 12 m or customized |
| Surface Treatment | Bright Annealed |
| Production Process | Electric Fusion Welded |
| Condition | Solution Annealed |
TP304 exhibits excellent resistance to general corrosion, as well as good formability and weldability. It is suitable for service temperatures ranging from -196°C to 800°C and is capable of withstanding exposure to atmospheric conditions, fresh water, mild acidic and alkaline media, and general chemical environments.
TP316 features a PREN (Pitting Resistance Equivalent Number) of ≥ 24, making it well-suited for environments involving seawater, brine, and chlorine-containing chemicals.
Astm A358 Tp304 316 Seamless Stainless Steel Tube utilizes a dual-pass Electric Fusion Welding (EFW) process; it is capable of withstanding high pressures (up to 16 MPa), thereby eliminating the risk of leakage of petrochemical media, and is ideally suited for high-hazard applications such as hydrocracking and high-pressure steam systems.
Customized Services
- TORICH offers customized sizing services and can perform full-penetration welding in accordance with the requirements of ASTM A358 Classes 1–5.
- We offer a range of surface treatments, including pickling and passivation, bright annealing, and mechanical polishing.
- We offer customized packaging services, including custom marking, stamping, and traceability labeling.
- We can provide customized connection options-such as flanged, grooved, or threaded connections-to reduce installation time.
Chemical Composition
| Element | C (%) | Mn (%) | Si (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| TP304 | ≤ 0.08 | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.030 | 18.0 – 20.0 | 8.0 – 11.0 | - |
| TP316 | ≤ 0.08 | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.030 | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HBW) |
| TP304 | ≥ 515 | ≥ 205 | ≥ 35 | ≤ 201 |
| TP316 | ≥ 515 | ≥ 205 | ≥ 35 | ≤ 217 |
Possible Alternative Grades
- Compared to TP304 and TP316, TP347 is better suited for long-term high-temperature service and is utilized in refinery heaters, converters, and high-temperature petrochemical pipelines.
- 904L is a high-alloy austenitic stainless steel that offers superior resistance to pitting and crevice corrosion compared to TP316; it is employed in acid plants, fertilizer production units, and seawater cooling systems.
- Alloy 600 retains its strength and corrosion resistance during short-term exposure to temperatures exceeding 1000°C; it is used in chemical reactors, furnace components, and high-temperature petrochemical equipment.
application areas
- In oil refineries: used for crude oil transport, refined product transport, hydrocracking systems, catalytic cracking systems, boiler superheaters/reheaters, and high-temperature steam pipelines;
- In petrochemical plants: used for chemical feedstock pipelines, pipelines for conveying acidic and alkaline media, connecting pipelines for chemical reactors, solvent transport pipelines, and condensate recovery pipelines;
- In offshore oil engineering: used for seawater cooling pipelines on offshore platforms, ship ballast water systems, and offshore oil and gas transmission pipelines.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What are the main differences between ASTM A358 and ASTM A312?
A: The primary difference lies in the manufacturing process. ASTM A358 covers electric-fusion-welded (EFW) pipe, whereas ASTM A312 covers both seamless pipe and electric-resistance-welded (ERW) pipe (produced without the addition of filler metal). ASTM A358 allows for the production of larger diameters and features stricter wall thickness tolerances.
Q: How do you ensure that the product welds are fully fused and free from any risk of leakage?
A: We employ a dual-pass Electric Fusion Welding (EFW) process to ensure that the weld penetration depth is equal to or greater than 100% of the pipe's wall thickness. Furthermore, every single pipe undergoes 100% radiographic testing (RT) for flaw detection, followed by a post-weld solution annealing treatment.
Q: What surface finish options are available?
A: Products are typically supplied in a bright annealed condition; however, we also offer a range of additional surface treatments, including pickling and passivation, mechanical polishing (ranging from 180-grit to a 600-grit mirror finish), electropolishing, and sandblasting.
Since its establishment, the company has adhered to the principle of sustainable and recyclable green development, focused on innovative breakthroughs in environmental protection production, and actively provided global customers with "full life cycle" environmental protection ASME 36.19 M A321 A312gr A358 316L S31803 Sch10s TP304 8mm 19mm 50mm Stainless Pipe services. We continue to create a harmonious business environment, eager to win-win cooperation concept. We welcome people of insight to work together to create a better life. Many years of production management experience, we strictly control the quality, according to the design before production, tracking after production, get the praise of customers.
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