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316L stainless steel pipe and tubing for process piping, general service and heat exchanger projects. Specify the grade, standard and dimensions for a quote.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A312 TP316L process pipe, A269 TP316L tube or A270 sanitary tubing as specified |
| Product or route | Low-carbon molybdenum-bearing austenitic stainless, UNS S31603 |
| Critical dimensions and fit | Separate process pipe, instrument tubing and sanitary bore finish into different RFQ lines |
| Supply enquiry | Confirm sizes, lengths, route, documentation and lead time for your order |
Selected ASME B36.19 dimensions. Schedule columns give nominal wall thickness. Theoretical inside diameter and mass use nominal dimensions, with a reference density of 8,000 kg/m³. Actual mass varies by grade and tolerances.
| NPS | OD (mm) | 10S wall (mm) | 40S wall (mm) | 80S wall (mm) | 40S ID (mm) | 40S kg/m |
|---|---|---|---|---|---|---|
| 1 | 33.40 | 2.77 | 3.38 | 4.55 | 26.64 | 2.55 |
| 2 | 60.33 | 2.77 | 3.91 | 5.54 | 52.51 | 5.54 |
| 3 | 88.90 | 3.05 | 5.49 | 7.62 | 77.92 | 11.51 |
| 4 | 114.30 | 3.05 | 6.02 | 8.56 | 102.26 | 16.38 |
| 6 | 168.28 | 3.40 | 7.11 | 10.97 | 154.06 | 28.80 |
Reference ASME B36.19 dimensional standard · Tonkin stainless pipe dimensional chart
For tubing, order by actual outside diameter and wall. Drawing example: NPS 2 Sch 40S pipe or 25.4 × 1.65 mm sanitary tube.
Use the approved design code and service conditions. The applicable rating depends on material, temperature, minimum effective wall, joint details and the limits of the connected assembly. A schedule or a hydrostatic test result alone cannot establish an operating pressure.
Reference ASME process piping code B31.3
Selected chemistry by mass for the A312 pipe designations below. The ordered edition, full element limits and any applicable notes govern acceptance. A dash means the value is omitted here.
| Grade | UNS | C (%) | Cr (%) | Mo (%) | Grade feature |
|---|---|---|---|---|---|
| TP316L | S31603 | ≤0.035 | 16–18 | 2–3 | Low carbon |
Reference ASTM A312/A312M scope · Centravis tubular product catalogue · Alleima high-temperature tubular grades
Selected minimum room-temperature tensile and yield strengths for A312 pipe. Elongation acceptance depends on the specimen orientation and applicable thickness basis. For tube orders, apply the nominated tube specification.
| Grade | Tensile minimum (MPa) | Yield minimum (MPa) |
|---|---|---|
| TP316L | 485 | 170 |
Reference ASTM A312/A312M scope · CTS A312 technical reference · Tioga A312 pipe grade reference
Verify the heat certificate, route and any bore-finish report separately.
| When | What to check |
|---|---|
| Before ordering | Document the required test method, edition and any witness points |
| At delivery | Match the material report and heat or lot identification to the shipment |
316L chemistry does not define a sanitary finish.
For the enquiry, separate process pipe, instrument tubing and sanitary bore finish into different RFQ lines.
A312 TP316L process pipe, A269 TP316L tube or A270 sanitary tubing as specified · NPS 2 Sch 40S pipe or 25.4 × 1.65 mm sanitary tube. Add quantity, lengths, delivery city and the required reports.
Stainless Steel Products
Enquire for 316L stainless steel pipes and tubes for projects in Mumbai and across India. Check the standard on your drawing: ASTM A312 for pipe, A269 for general-service tubing or A213 for seamless heat exchanger tubing.
316L is the low-carbon version of 316 stainless steel. Its lower carbon content helps reduce the risk of intergranular corrosion after welding. Confirm the required grade and product standard on the material certificate.
Technical Information
Match the standard on your drawing or bill of materials. Compare the three product types below, then use the pipe size and schedule reference if you are ordering pipe.
Swipe or scroll to see all table columns.
| Product | Specification | Details to quote |
|---|---|---|
| 316L stainless steel pipe | ASTM A312 TP316L Prepare a pipe brief | Nominal pipe size, schedule or wall, length, end preparation and seamless or welded route if specified. |
| 316L general-service tubing | ASTM A269 TP316L Prepare a tubing brief | Actual outside diameter, wall thickness, length, tolerance and finish if specified. |
| 316L seamless heat exchanger tube | ASTM A213 TP316L Prepare a heat exchanger brief | Outside diameter, minimum or average wall as specified, and straight length or drawing reference. |
For an ASME project, include the exact designation and edition on your purchase list. A grade match alone does not establish compliance with the required product standard.
Swipe or scroll to see all table columns.
| Product | Specification | Details to quote |
|---|---|---|
| 316L stainless steel pipe | ASTM A312 TP316L Prepare a pipe brief | Nominal pipe size, schedule or wall, length, end preparation and seamless or welded route if specified. |
A312 is the material and product specification. ASME B36.19 is a dimensional standard for stainless steel pipe. Include the exact schedule suffix from the drawing, such as 40S, and state whether seamless or welded pipe is required.
Swipe or scroll to see all table columns.
| Product | Specification | Details to quote |
|---|---|---|
| 316L general-service tubing | ASTM A269 TP316L Prepare a tubing brief | Actual outside diameter, wall thickness, length, tolerance and finish if specified. |
A269 covers seamless and welded general-service tubing. Give the actual OD and wall thickness in the same unit system. If the tube must match a compression fitting or existing assembly, include the required OD tolerance and surface finish.
Swipe or scroll to see all table columns.
| Product | Specification | Details to quote |
|---|---|---|
| 316L seamless heat exchanger tube | ASTM A213 TP316L Prepare a heat exchanger brief | Outside diameter, minimum or average wall as specified, and straight length or drawing reference. |
A213 covers seamless heat exchanger, boiler and superheater tubing. For replacement tubes, give the OD, wall basis, cut length and tube drawing reference. If the drawing calls for welded exchanger tubes, confirm the specified standard before quoting.
Dimensional Reference
Order pipe by nominal pipe size (NPS) and schedule, or by outside diameter (OD) and wall thickness if the drawing specifies them. Order tube by actual OD and wall thickness. An NPS 2 pipe and a 2-inch-OD tube are different items.
| NPS | Outside diameter | Sch 10S wall | Sch 40S wall | Sch 80S wall |
|---|---|---|---|---|
| ½ | 21.34 | 2.11 | 2.77 | 3.73 |
| 1 | 33.40 | 2.77 | 3.38 | 4.55 |
| 1½ | 48.26 | 2.77 | 3.68 | 5.08 |
| 2 | 60.32 | 2.77 | 3.91 | 5.54 |
| 3 | 88.90 | 3.05 | 5.49 | 7.62 |
| 4 | 114.30 | 3.05 | 6.02 | 8.56 |
| 6 | 168.29 | 3.40 | 7.11 | 10.97 |
Dimensional reference only, not an inventory list or pressure rating. Values follow heco’s ASME B36.19 product sheet. Confirm the edition, wall tolerance and availability against your order.
NPS 2 Sch 40S calls for an OD of about 60.3 mm and a nominal wall of 3.91 mm. At the same NPS, Sch 80S keeps the OD and changes the nominal wall to 5.54 mm. If the purchase list states only “2-inch 316L,” ask whether it means nominal pipe size or actual tube OD before ordering.
Material Selection
The low carbon content helps limit carbide precipitation during welding, reducing the risk of intergranular corrosion in the heat-affected zone. The molybdenum in the 316 family also improves resistance to localised corrosion compared with standard 304 grades. That does not make 316L suitable for every chloride exposure: temperature, concentration, crevices and cleaning conditions still matter.
Choose the grade and manufacturing route stated on your drawing. If both seamless and welded forms are allowed, ask for the route to be stated on the quotation. If you’re offered dual-marked 316/316L, check the certificate against the required grade and standard.
Applications
01 / Process piping
For A312 pipe, provide NPS, schedule or specified wall, lengths and end preparation. For a replacement spool, include the line class or drawing reference and any restrictions on the manufacturing route.
02 / General-service tubing
Where the job calls for A269, give OD × wall, length and the finish or tolerance required by the connection. If the application has a separate hygiene or surface-finish specification, include it in the enquiry.
03 / Heat exchanger tubing
For an A213 replacement, include tube OD, wall basis, cut length, quantity and the drawing reference. If the drawing calls for welded tubes, confirm the specified standard before treating them as substitutes for A213 seamless tubes.
Ordering Guide
Copy the format that fits your requirement, then add quantity and delivery city. The dimensions below illustrate how to write an enquiry; they are not a stock list.
Include the manufacturing route and end preparation when the drawing specifies them.
Example formatASTM A312 TP316L · NPS 2 · Sch 40S · 6 m lengthsState OD, wall and length in one unit system. Include a finish or tolerance if the job requires one.
Example formatASTM A269 TP316L · 12 mm OD × 1 mm wall · 3 m lengthsState the wall basis and cut length. For a replacement, include the existing tube drawing or equipment reference.
Example formatASTM A213 TP316L · 19 mm OD × 1.65 mm minimum wall · 4 m lengthsBuyer’s guide
On a typical mixed skid, TP316L process pipe, general-service instrument tube and sanitary tubing are three different procurement lines. Keep the nominated A312, A269 or A270 standard with the line it governs. When the hygienic line has a specified bore finish, ask for the maximum inside roughness and the test report to appear on that line.
For a replacement spool, match the existing pipe OD, wall and end preparation. Add the cut lengths or random-length allowance and include any fabrication allowance on the drawing. If there is a shutdown date, ask the quotation to show the available quantity, dispatch lead time and whether any inspections are required before release.
Agree how the heat or lot marking will be carried onto cut pieces and bundles. Match the supplier’s document list to each order line before dispatch. For a dual-marked offer, confirm the certificate, specification and grade callout satisfy the project’s requirements. For a sanitary line, confirm the surface finish documentation and end protection as separate items.
| Skid line | What goes on that line | Product page |
|---|---|---|
| Process manifold | NPS, schedule and end preparation | ASTM A312 / ASME SA-312 Stainless Steel Pipe |
| Instrument take-off | Actual OD, wall and fitting series | ASTM A269 / ASME SA-269 Stainless Steel Tubing |
| Product contact line | Bore finish, end protection and any required reports | ASTM A270 Sanitary Tubing |
Send a piping isometric with the TP316L pipe schedule and spool dimensions. Attach a separate tube take-off schedule with actual OD, wall and ferrule or clamp requirements. This gives the buyer comparable offers and the fabricator the dimensions needed to fit the parts.
Ask for a report or acceptance method for the specified inside surface, including weld-seam treatment where required.
Technical references ASTM steel standards directory · Outokumpu grade reference
Procurement Checks
Ask for the grade, standard and manufacturing route to be confirmed against each line item. If your project requires an MTC, state the certificate type in the enquiry. On receipt, match the heat number on the material or its traceability tag to the certificate, then verify the grade, standard, chemistry and mechanical results against the purchase order. Specify any extra inspection or witness test before pricing.
Buyer Questions
Use the grade on your drawing or purchase order. The lower carbon content is the key distinction for 316L in welded service. If offered material marked 316/316L, ask for documentation confirming it meets the specified grade and product standard.
Not by grade alone. Compare the product specification, dimensional tolerances and project requirements. A pipe schedule and an actual tubing wall describe different ordering systems.
No. Design pressure depends on factors including wall thickness, diameter, temperature and the applicable design code. Use the project engineer’s specified product and dimensions.
Send the measured outside diameter, wall thickness if known, and any markings or drawing reference. OD alone does not identify the schedule or the grade.
Dimensions, manufacturing route, quantity, finish, inspection and delivery terms all affect the quote. Send the full line item and delivery city for a like-for-like comparison.
Technical references: ASTM A312 · ASTM A269 · ASTM A213 · ASME B36.19 · 316L grade reference
Related products and standards
Project Enquiries
Send your line items, quantities and delivery city. Ask Simplex Metal to confirm availability, lead time and any required documents for your order.