Products Description
Product Specifications
| Standards | ASTM A312 / ASME SA312 |
| Steel Grades | P XM-19 TP XM-10 TP XM-11 TP XM-15 TPXM-29 304 304L 304H 304LN 309S 309H 310S 316 316L 316LN 317 321 347 347H 348 904L,etc. |
| Equivalent Standards | EN 10216-5, DIN 17456, JIS G3459, GOST 9941 |
| Outer Diameter (OD) | 6 mm – 630 mm, cuatomized |
| Wall Thickness (WT) | 0.5 mm – 55 mm, cuatomized |
| Length | 6/12m, cuatomized |
| Surface Treatment |
Pickled & Passivated |
| Production Process | Hot Rolled / Cold Rolled / Cold Drawn |
| Condition | Annealed & Pickled |
Compared to conventional carbon steel pipes and welded stainless steel pipes, ASTM A312 seamless stainless steel tube-manufactured via processes such as cold drawing or cold rolling-eliminates the risk of weld-seam leakage, thereby ensuring inherent safety when handling leak-prone media like hydrogen and light hydrocarbons.
TORICH seamless tubes are manufactured from stainless steel grades such as TP321H and TP316L, offering material solutions tailored to specific operating conditions. TP316L effectively resists corrosion from sulfur-bearing refinery wastewater, seawater cooling systems, and acidic oil and gas environments, while TP321H maintains excellent creep strength and resistance to sensitization at high temperatures ranging from 550°C to 800°C.
Customized Services
- TORICH offers non-standard outside diameters and wall thicknesses, capable of manufacturing to specifications beyond ASME B36.10/B36.19 to meet precise dimensional requirements for specialized applications such as heat exchanger tube bundles and instrumentation tubing.
- In addition to standard solution annealing, specialized heat treatment processes-including stabilization, stress-relief annealing, and cryogenic treatment-are available.
- Customized end-processing services are provided, including V-bevel, U-bevel, and double V-bevel machining; NPT/BSPT tapered pipe threading; prefabricated flange welding; and tube end flaring or swaging.
Chemical Composition
| Grade | C | Cr | Ni | Mo | Mn | N | Si | P | S | Nb + Ta | Fe |
| TP XM-19 | ≤ 0.06 | 20.5 – 23.5 | 11.5 – 13.5 | 1.5 – 3.0 | 4.0 – 6.0 | 0.20 – 0.40 | ≤ 1.0 | ≤ 0.04 | ≤ 0.03 | – | Balance |
| TP309H | 0.04 – 0.10 | 22.0 – 24.0 | 12.0 – 15.0 | – | ≤ 2.0 | – | ≤ 1.5 | ≤ 0.045 | ≤ 0.03 | – | Balance |
| TP348 | ≤ 0.08 | 17.0 – 20.0 | 9.0 – 13.0 | – | ≤ 2.0 | – | ≤ 1.0 | ≤ 0.045 | ≤ 0.03 | 10×C – 1.0 | Balance |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| TP XM-19 | ≥ 690 | ≥ 379 | ≥ 35 | ≤ 100 |
| TP309H | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 95 |
| TP348 | ≥ 515 | ≥ 205 | ≥ 35 | ≤ 95 |
Possible Alternative Grades
- TP310H contains higher levels of chromium and nickel than TP309H, making it suitable for extreme high-temperature environments-such as hydrocarbon refining furnace tubes and steam superheaters-though it comes at a higher price point.
- For high-pressure, high-chloride applications requiring superior strength and better pitting corrosion resistance, 2205 duplex stainless steel is a suitable choice.
- TP347/TP347H is more cost-effective than TP348 and is frequently used in the petrochemical industry for high-temperature, hydrogen-rich service and applications requiring resistance to polythionic acid stress corrosion cracking.
application areas
- Crude Distillation Unit (CDU/VDU): Atmospheric and vacuum tower overhead lines, side-draw piping, and furnace radiant tubes.
- Fluid Catalytic Cracking (FCC) & Hydrocracking: High-temperature catalyst transfer lines, main fractionator heat exchanger tube bundles, and reactor hydrocarbon vapor lines.
- Hydrodesulfurization/Hydrotreating (HDS/HDT): High-pressure stainless steel tube bundles for hydrogen service, reactor inlet/outlet piping, and sour water neutralization lines.
- Delayed Coking & Visbreaking: Coke drum feed lines, quench oil piping, and furnace convection tubes; requires resistance to high-temperature creep and sulfidation.
- Sulfur Recovery & Tail Gas Treatment (SRU/TGTU): Process gas reheaters and acid gas heat-traced lines; requires resistance to sulfide stress corrosion cracking.
- Liquefied Natural Gas (LNG) & Gas Fractionation: Safety valve bypasses for cryogenic liquefaction lines and boil-off gas (BOG) handling lines.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: Besides the standard 6-meter length, can you provide longer pipes to reduce field welding joints?
A: A: Yes. We can provide single, seamless pipes of 9 meters, 12 meters, and even 18 meters, especially suitable for heat exchanger tube bundles and process piping on pipe racks.
Q: Can ASTM A312 seamless stainless steel tube be used in acidic oil and gas environments containing hydrogen sulfide (H₂S)?
A: Yes. TP316L stainless steel is suitable for mild to moderate sour service. For severe H₂S environments, material selection should follow NACE MR0175 / ISO 15156 requirements, with Duplex 2205 or nickel alloys recommended for higher corrosion resistance.
Q: What is the maximum service temperature of ASTM A312 stainless steel pipe?
A: It depends on the specific material grade and failure criteria. From an oxidation resistance perspective, the continuous service limit for TP304/316 is approximately 870℃, while TP310S can reach 1050℃.
Hot Tags: astm a312 seamless stainless steel tube, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, tp304l stainless steel pipe, 316 stainless steel tubing polished, sa 249 tp316l
