Based on the premise of technological innovation and improvement of our din 2391 st52, Steel Pipe, sa312 tp321, we continue to surpass and improve ourselves, and have been supported and trusted by our customers. We firmly believe that excellent service quality and good customer relationship are the fundamentals of our company's survival and development. We think that we should find talents in innovation practice, cultivate talents in enterprise activities, and gather talents in business planning and entrepreneurship. We take safety, high efficiency, economy and practicality as the core, and keep on developing and innovating. In view of the current situation, only through continuous reform and innovation, and continuous value creation, can our company make steady progress in the fierce market competition.
Products Description
Product Specifications
| Standards | ASTM A312 / ASME SA312 |
| Steel Grades | TP316L (UNS S31603) |
| Equivalent Standards | EN 10216-5 1.4404 / 1.4401, JIS G3459 SUS316LTP, GOST 03Ch17N14M3 |
| Outer Diameter (OD) | 5 mm - 630 mm, customized |
| Wall Thickness (WT) | 0.5 mm - 55 mm, customized |
| Length | 6/12 m, or customized |
| Surface Treatment | Pickling and passivation |
| Production Process | Hot Rolled, Cold Rolled, Cold Drawn |
| Condition | Annealed |
ASTM A312 TP316L is an extra-low carbon austenitic stainless steel; solution annealing effectively prevents chromium carbide precipitation and eliminates the risk of intergranular corrosion following welding or hot working, allowing for direct use without post-weld heat treatment.
Manufactured using a seamless process with a thick-wall design, the Sa 312 316l Thick Wall Seamless Stainless Steel Tube withstands operating pressures exceeding 42 MPa, making it particularly suitable for high-pressure wellhead control lines, chemical injection, and instrumentation tubing.
Compared to 304/304L grades, 316L offers a service life more than three times longer in environments exposed to salt spray, seawater splash, and acidic crude oil, with an operating temperature range of -196°C to 450°C.
Customized Services
- TORICH offers customization for non-standard outer diameters and increased wall thicknesses, capable of producing ultra-thick-walled piping up to 80mm.
- To withstand the high-salinity, corrosive environments of offshore oil and gas platforms, we provide surface treatments such as enhanced pickling and passivation, mirror polishing, and matte sandblasting for corrosion resistance.
- We offer advanced processing services, including pipe end beveling, threading, flange welding, swaging, and flaring.
- Customized packaging options are available, including anti-rust oil, waterproof wrapping, wooden pallets, and anti-rust cartons.
Chemical Composition
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum | Nitrogen |
| Content (%) | ≤ 0.035 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 | ≤ 0.10 |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness |
| Value | ≥ 485 MPa | ≥ 170 MPa | ≥ 40 % | ≤ 217 HB |
Possible Alternative Grades
- For heat exchanger tubes and high-temperature refinery process lines, TP316Ti is an option; while slightly more expensive than 316L, it offers greater stability in welded, high-temperature systems, though it has lower resistance to seawater corrosion.
- Duplex stainless steel 2205 offers superior pitting resistance and higher yield strength compared to 316L; however, it costs over 40% more and exhibits poor low-temperature toughness and resistance to low-temperature corrosion.
- Alloy 625 provides superior resistance to chloride-ion corrosion and excellent high-temperature stability compared to 316L, making it suitable for high-temperature, corrosive process piping, although its cost is more than 8–10 times that of 316L.
applications
SA 312 TP316L heavy-wall seamless stainless steel pipes are widely used in upstream and downstream systems within the oil and gas industry.
- Offshore oil and gas production platforms: Seawater cooling systems, firewater piping systems, and produced water treatment piping systems.
- Subsea and offshore auxiliary systems: Protective conduits for subsea control lines and auxiliary piping systems for chemical injection.
- Oil refining process units: Distillation unit piping and cooling water circulation systems.
- Gas processing and compression stations: CO2 and wet gas processing systems and fuel gas distribution systems.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: Does 316L pipe require heat treatment after welding?
A: No. 316L has a carbon content of ≤0.03%, eliminating the risk of intergranular corrosion. Post-weld solution annealing is unnecessary, significantly simplifying on-site oil and gas construction processes and reducing costs.
Q: Can 316L stainless steel be used in acidic environments containing hydrogen sulfide?
A: Yes, in mild sour service when compliant with NACE MR0175 requirements.
Q: What surface treatment options are available?
A: Pipes are supplied with a pickled and passivated surface (uniform silver-white). Bright annealing (BA grade), mechanical polishing to 400# or 600# finish, or temporary anti-rust coating as needed are available. For welded areas, pre-grooved beveling protection can also be specified.
We have won unanimous praise from customers for great quality, product performance and excellent after-sales service. We sincerely hope to establish a healthy and long-term cooperative relationship with every customer from all over the world. If you have any inquiries about our Large Size Inox Tube Sch10s Stainless Steel ASTM A312 TP304/304L/316/316L Welded Pipe, please contact us in time. Our company takes "details achieve quality, service creates brand" as the operating principle. Although we face many challenges, we believe that we can gain a firm foothold in the world market with our professional technology and excellent products.
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