The major difference between 316L pipe and 316 is that 316L has a lower carbon content, which makes it highly resistant to sensitisation and intergranular corrosion.
ASTM A312 Stainless Steel 316L Seamless Pipe Manufacturer
We, Xintongda Special Steel (XTD), are a trusted manufacturer of stainless steel 316L seamless pipe. Also known as marine grade, this stainless steel 316L pipe is very similar to 316, with the major difference being a low amount of carbon (0.035%). 316L is a high-grade, austenitic stainless steel seamless pipe. We manufacture our SS 316L pipes in accordance with ASTM A312, EN, JIS, and GB standards.
The UNS S31603 pipe can withstand marine and chloride environments. Due to its low carbon content, this alloy resists sensitisation during welding. The higher amount of molybdenum (2-3%) present in this alloy makes it more corrosion-resistant than SS 304. These characteristics make stainless steel 316L suitable for pharmaceutical, chemical processing, marine, and other industrial applications that consistently face harsh chemicals and elevated temperatures.
At XTD, we carry over four decades of experience and hold multiple international certifications. Our production and supply capacity is 25,000 tons. We remain a reliable supplier in China and other countries, as we deliver in-stock products within a week and production orders in 15-60 days.
316L stainless steel pipe specifications:
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Standard
ASTM A312
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OD Range
6-1016 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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Technical Data
Technical Data
SS 316L Seamless Pipe Manufacturing Process
To make ASTM A312 TP316L pipe, we first take a strong stainless steel billet and heat and pierce it to form a hollow shell. This shell then undergoes hot working, followed by cold-drawing/ cold-rolling to get precise dimensions. The next step is to perform solution annealing to increase the pipe’s corrosion resistance and ductility. The last step is to perform acid pickling and straightening, after which we send it for testing. To learn more about our manufacturing process, kindly visit this page.
What are the Key Features of 316L Stainless Steel Pipe?
There are 5 main properties of the SS 316L seamless pipe: corrosion resistance, low carbon content, excellent weldability, good formability & ductility, and biocompatibility.
- Corrosion Resistance: The chromium (16-18%) present in this alloy forms a stable passive Cr₂O₃ oxide layer that shields the metal from oxidation and most acids, and the molybdenum (2-3%) stabilises this layer to prevent pitting and crevice corrosion.
- Low Carbon Content: The low carbon content (0.035%) in the SS 316L pipe prevents chromium carbides from forming at grain boundaries (intergranular corrosion). It also minimises carbide precipitation.
- Excellent Weldability: The low carbon content prevents sensitisation, which ensures the alloy retains excellent weldability even after welding.
- Good Formability & Ductility: The austenitic microstructure and the balanced chemical composition make stainless 316L pipe more formable and ductile.
- Biocompatibility: SS 316L pipe is biocompatible because of its non-toxic composition and low-ion leaching in physiological environments.
ASTM A312 TP316L Stainless Steel Seamless Pipe Equivalent Material
The 316L seamless stainless steel pipe is globally recognised by its UNS designation as S31603. It is also known as DIN/EN 1.4449 (European), AISI 316L (American), and JIS SUS 316L (Japanese).
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 316L | S31603 | S31603 | 022Cr17Ni12Mo2 | SUS316L | X2CrNiMo17-12-2 | 1.4404 | 03X17H14M2 |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
316L Seamless Stainless Steel Pipe Industrial Applications
The industrial applications of ASTM A312 TP316L Stainless Steel Pipe include pharmaceutical, kitchenware & food processing, marine, chemical processing, and textile & paper processing.
Pharmaceutical
As the 316L pipe is biocompatible, it is used in surgical implants (bone screws, pins, plates), medical devices, prosthetic components, and pharmaceutical processing equipment.
Kitchenware and Food Processing
Used in brine & seafood processing, cleaning-in-place (CIP) systems, storage & transportation tanks, and various production equipment.
Marine Applications
SS 316L pipe finds its use in shipbuilding, desalination plants, boat fittings, coastal and marine construction, etc.
Chemical Processing
Used extensively in heat exchangers, water treatment, pumps & valves, extraction of petrochemicals, etc.
Textile and Paper Processing
Generally found in dyeing & bleaching equipment, washing machinery, waste management systems, etc.
Frequently Asked Questions
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How is 316L pipe different from 316?
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What are the standard sizes of 316L seamless pipes?The outer diameter of our 316L pipe ranges from 6-1016 mm, the thickness ranges from 1-65 mm, and the length goes up to 18 m.
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Does SS 316L seamless pipe rust?No, SS 316L pipe doesn’t rust easily, even when exposed to highly corrosive conditions and elevated temperatures.