316L stainless Steel Tubing sizes chart
Mar 26, 2026
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Are you currently searching for the right 316L stainless steel pipe specifications for your application? For procurement managers and engineers, this is a common challenge,especially in industries such as chemical processing, medical equipment, food processing, and heat exchangers. Choosing the wrong pipe specifications can lead not only to pressure failure or installation difficulties, but also to unnecessary cost increases.
In this guide, we will provide you with a clear and comprehensive 316L stainless steel pipe specification chart, explain the key factors in material selection, and help you avoid common purchasing mistakes.
What are the dimensional standards for SS 316L tubing?
For 316L tubing, the most commonly used standards include:
ASTM A269: Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service.
ASTM A213: Applicable to tubes for high-temperature boilers, superheaters, and heat exchangers.
ASTM A312:ASTM A312 is the standard specification for seamless, straight-seam welded, and heavily cold-worked (HCW) austenitic stainless steel pipe designed for high-temperature and general corrosive service.
Schedule Chart of 316L Stainless Steel round Pipe
This schedule chart applies to 316L stainless steel round pipes (seamless/welded), complying with ASTM A312, ASME B36.10M standards.
|
Nominal Size (NPS) |
Outside Diameter (OD) (mm) |
Schedule |
Wall Thickness (WT) (mm) |
Inside Diameter (ID) (mm) |
Approx. Weight per Meter (kg/m) |
|---|---|---|---|---|---|
|
1/2" |
21.34 |
SCH 40 |
2.77 |
15.80 |
1.31 |
|
1/2" |
21.34 |
SCH 80 |
3.73 |
13.88 |
1.70 |
|
3/4" |
26.67 |
SCH 40 |
2.87 |
20.93 |
1.74 |
|
3/4" |
26.67 |
SCH 80 |
3.91 |
18.85 |
2.28 |
|
1" |
33.40 |
SCH 40 |
3.38 |
26.64 |
2.63 |
|
1" |
33.40 |
SCH 80 |
4.55 |
24.30 |
3.44 |
|
2" |
60.33 |
SCH 40 |
3.91 |
52.51 |
5.56 |
|
2" |
60.33 |
SCH 80 |
5.54 |
49.25 |
7.60 |
|
3" |
88.90 |
SCH 40 |
5.49 |
77.92 |
11.70 |
|
3" |
88.90 |
SCH 80 |
7.62 |
73.66 |
15.90 |
|
4" |
114.30 |
SCH 40 |
6.02 |
102.26 |
16.20 |
|
4" |
114.30 |
SCH 80 |
8.56 |
97.18 |
22.50 |
Note: 1. All data are based on the specifications for 316L stainless steel (UNS S31603) outlined in the ASTM A312 standard, featuring a minimum yield strength of 275 MPa and a tensile strength of 485 MPa.
2. The weight per meter is an approximate value, calculated using the following formula: Weight (kg/m) = 0.02491 × (Outer Diameter - Wall Thickness) × Wall Thickness.
3. This piping is suitable for use in chemical processing, marine engineering, food processing, and other corrosive environments.
4. For SCH 160 or other special pipe schedules, please contact us to obtain customized specifications.
Click to Get the 316L SCH 160 Pipe Specification
What is the difference between 316 and 316L stainless steel pipes?
The primary difference between 316 and 316L stainless steel pipes is carbon content: 316L (Low carbon) has a maximum of 0.03% carbon, while 316 has up to 0.08%. This lower carbon in 316L reduces carbide precipitation during welding, providing superior corrosion resistance in welded structures, while 316 offers slightly higher tensile strength.
Key Factors Buyers Must Consider
1. Outer Diameter and Wall Thickness
Many buyers tend to focus solely on the Outer Diameter (OD); however, a tube's pressure-bearing capacity actually depends on its wall thickness. For instance, increasing the wall thickness by just 1 mm can boost pressure resistance by 20% to 40%. While thin-walled tubes may reduce costs, they also increase the risk of failure.
2. Application Requirements
Heat Exchangers: Require precise Inner Diameter (ID) dimensions to ensure efficient and smooth fluid flow.
Food and Pharmaceutical Industries: Require tubes with smooth inner surfaces (Roughness Ra ≤ 0.8 μm).
Chemical Industry: Requires tubes that possess excellent corrosion resistance and appropriate wall thickness.
3. Standards and Compliance
It is imperative to ensure that the selected tubing complies with the following standards:
ASTM A269 / A213 (Standards for general-purpose and heat exchanger tubing)
EN 10216-5 (European Standard)
Products that fail to meet these standards may result in dimensional mismatches or even a shortened service life for the tubing.
4. Length and Customization Services
The standard length for tubing is typically 6 meters; however, many projects often present specific requirements:
Precision cut-to-length services (with a tolerance range of ± 1 mm)
Coiled tubing for specialized applications
By utilizing customization services, material waste generated during installation and construction can be reduced by 10% to 15%.
As a professional supplier of 316L stainless steel, GNEE ensures that all our 316L tubing complies with ASTM and EN standards. We provide comprehensive Material Test Certificates (MTCs) and offer third-party inspection services upon request. We accommodate non-standard dimensions, small-batch orders, and precision cutting services; furthermore, we guarantee an on-time delivery rate exceeding 95% to minimize the risk of project delays.
316L SS pipe Material Test Certificates
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