Products Description
Product Specifications
| Standards | ASTM A269 / ASME SA269 |
| Steel Grades | TP201 TP201LN TP304 TP304L TP304LN TP316 TP316L TP316LN TP317 TP321 TP347 TP348 TPXM10 TPXM11 TPXM15 TPXM19 TPXM29, etc. |
| Equivalent Standards | EN 10216-5, DIN 17458, JIS G3459, etc. |
| Outer Diameter (OD) |
6mm - 630mm |
| Wall Thickness (WT) |
0.5mm - 55mm |
| Length | 6/12 m |
| Surface Treatment | Polished, bright annealed |
| Production Process | Cold drawing / Cold rolling |
| Condition | Solution annealed |
Through cold drawing and polishing of both inner and outer surfaces, TORICH Seamless 316 Stainless Polished Steel Tubing achieves a surface roughness (Ra) of less than 0.8 μm, making it suitable for high-purity chemical applications and the clean transport of oil and gas.
Grade 316 stainless steel contains 2.0%–3.0% molybdenum and has a Pitting Resistance Equivalent (PRE) of ≥25; it resists corrosion from chemical media such as sulfuric acid, acetic acid, and phosphates, effectively preventing pipeline perforation and degradation caused by petrochemical brines, oil and gas, and acidic or alkaline substances.
Customized Services
- TORICH offers customized surface finishing services, including standard precision polishing (Ra ≤ 1.6μm), mirror-finish super-polishing (Ra ≤ 0.4μm), and electropolishing (EP).
- We support customization of non-standard outer diameters and wall thicknesses, with tolerances tightenable to ±0.05mm upon request; options include fixed lengths (3m–12m), extra-long straight tubes, and coiled tubing.
- We provide end-processing services such as beveling (weld preparation), threading (NPT/BSP), plain ends, flange-welded ends, and custom threading; plastic end caps are available as an option.
Chemical Composition
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) |
| 316 | ≤ 0.08 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 10.0 – 14.0 | 16.0 – 18.0 | 2.0 – 3.0 |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness |
| Value (316) | ≥ 515 MPa | ≥ 205 MPa | ≥ 40% | ≤ 217 HB |
Possible Alternative Grades
- For petrochemical piping systems characterized by numerous welded joints, exposure to humid and corrosive media, and low-temperature, high-pressure conditions, TP316L is a suitable choice; while slightly more expensive than 316, it effectively prevents post-welding intergranular corrosion.
- For high-temperature applications exceeding 800°C, TP316H is recommended; it is specifically designed for high-temperature, high-pressure heat exchangers, high-temperature process piping, and boiler-related piping systems.
- For deep-sea oil and gas extraction, as well as refining desulfurization and denitrification systems involving high chloride ion concentrations, high salinity, and severe corrosivity, 2205 duplex stainless steel is an appropriate option; it offers twice the strength of 316 and superior resistance to pitting and crevice corrosion.
Application areas
- Oil Refining Units: Instrument impulse lines, process sampling lines, and medium/low-pressure process material transfer piping
- Chemical Processing: Acidic/alkaline medium transfer lines, reactor feed lines, and catalyst injection lines
- Oil & Gas Industry: Offshore platform hydraulic lines, chemical injection lines, and wellhead control lines
- Heat Exchange Systems: Auxiliary heat exchanger tube bundles and condenser tubes
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: What are the benefits of polishing for chemical pipelines?
A: Mirror polishing reduces internal surface roughness to Ra ≤ 0.8 μm, significantly lowering fluid resistance, preventing the buildup of chemical impurities and scale, and avoiding contamination from residual media. It also enhances corrosion and oxidation resistance, extends service life, and makes the piping suitable for transporting high-purity chemical media.
Q: What are the maximum pressure and temperature ratings for the piping?
A: Standard products have a maximum pressure rating of 16 MPa at room temperature, making them suitable for the vast majority of petrochemical applications. The operating temperature range is -196°C to 870°C, with no significant degradation in mechanical properties or corrosion resistance under high or low-temperature conditions.
Q: What polishing options are available?
A: Depending on the application, available processes include mechanical polishing, internal polishing, external polishing, bright annealing, passivation, and electropolishing.
Hot Tags: seamless 316 stainless polished steel tubing, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, 316 stainless steel tubing polished, tp304l stainless steel pipe, sa 249 tp316l
