+91 9920492715
sales@simplexmetal.com
ISO 9001:2015 Certified
Exporting Worldwide
Since 1995
Stainless steel overview
Compare stainless steel pipe and tube grades, shapes and specifications. Send Simplex Metal your sizes, quantities and delivery city for a quote.
Request a quoteTechnical reference
| Field | Order reference |
|---|---|
| Standard | A312 pipe, A269 general-service tubing, A554 mechanical tubing |
| Product or route | Round pipe and tubing, or formed square and rectangular sections |
| Critical dimensions and fit | Use NPS and schedule for pipe, actual OD × wall for round tubing, or sides × wall for profiles |
| 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 versus 12 × 1 mm tubing.
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
The grade on the purchase line controls chemistry. Specify the grade with the finished product standard or drawing.
| Check | What to match |
|---|---|
| Grade and specification | TP or UNS on the quotation and material report |
| Heat analysis | Full limits and any stabilising or alloy additions under the ordered edition |
Reference ASTM steel standards
Use the ordered grade, delivery condition and product standard to review the actual tensile, yield, elongation or hardness results required by the order.
| Check | What to verify |
|---|---|
| Condition | Heat treatment or cold-work condition stated for the offered form |
| Acceptance | Project-specified dimensions and relevant test records |
Reference ASTM steel standards
Match grade, route and heat or lot marking to the certificate.
| 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 |
Choose the product standard before comparing quotes.
For the enquiry, use NPS and schedule for pipe, actual OD × wall for round tubing, or sides × wall for profiles.
A312 pipe, A269 general-service tubing, A554 mechanical tubing · NPS 2 Sch 40S pipe versus 12 × 1 mm tubing. Add quantity, lengths, delivery city and the required reports.
Ordering guidance
A grade tells you the material, but it does not identify what to buy. A purchase line for round pipe needs the nominal size and schedule or specified wall. A purchase line for tubing needs the actual outside diameter and wall thickness. For square and rectangular sections, use the outside side dimensions and wall.
If the drawing calls for a pipe standard, start with A312 for the listed austenitic grades or the specified duplex pipe standard. If it calls for tubing, check whether the application is general service, sanitary, heat transfer or a shaped mechanical section. Confirm the grade and route against the order rather than assuming every form is offered to every standard.
Check pricing and availability →
Buyer’s guide
A pipe for a welded process spool, tubing for a compression fitting and a square section for a guard frame are three different orders, even if the alloy is 316L in each. Pipe connects through a nominal size system. Instrument tubing mates on actual OD. A formed section introduces corner radii and seam position. Start with the connection or fabrication drawing so the quotation describes the geometry you will receive.
304 and 316 families are austenitic grades. The L suffix identifies a low-carbon grade, while 2205 and 2507 are duplex grades with their own pipe and tube standards. A grade does not specify whether an item is seamless or welded. It also leaves the inside or outside finish open. List the permitted manufacturing route, test scope and finish alongside the grade so two suppliers price the same requirement.
On delivery, reconcile the grade, standard and heat or lot references on the certificate with the product or bundle marking. For cut lengths, agree how identification will be retained before dispatch. If the order includes different grades with similar dimensions, ask for separate tags or bundles so the material can be identified in stores.
| Product form | First fit check | Next step |
|---|---|---|
| Round pipe | Mating pipe OD, wall and end detail | ASTM A312 / ASME SA-312 Stainless Steel Pipe |
| Instrument tubing | Exact fitting OD and permitted tube condition | Stainless Steel Instrumentation Tubing |
| Shaped mechanical tubing | Outside sides, corner radius and wall | Stainless Steel Rectangular Tube |
| Duplex pipe or tube | Pipe or tube specification and exact UNS designation | Duplex 2205 Pipes & Tubes |
For one Mumbai delivery, list “A312 TP316L pipe, NPS and schedule per spool drawing” and “A269 TP316L tube, 12 mm OD × 1 mm wall per panel drawing” as separate quote lines. Add quantities and lengths to each.
Both. The alloy identifies the material. The specification and order define the product form, tolerances and acceptance requirements.
Technical references ASTM steel standards directory · ASME B36.19 pipe dimensions · Outokumpu grade reference
Prepare your enquiry
| Item | What to send |
|---|---|
| Product details | Grade · product form · standard · NPS and schedule or OD and wall · delivery city |
| Delivery | Quantity with units, delivery city and required date if known |
| Acceptance | Required certificates and inspection scope; attach the drawing revision where applicable |
Yes. List them separately so the quote can show the standard, dimensions and manufacturing route for each line.
Project enquiries
Send your dimensions, quantities and delivery city. Include any inspection or material certificate requirements so they can be quoted against the same line items.
Request a quote → Call +91 99204 92715