304 Stainless Steel Welded Pipe
304 welded stainless steel pipe and tube to ASTM A312, A249 and A554 — industrial, sanitary and polished decorative, round, square and rectangular sections.
Supply routes
- In-house production or processing
- Qualified partner-mill sourcing
- Stock coordination
Grade datasheets:304
Specifications
| Grade | 304 / 304L |
|---|---|
| Standard | ASTM A312 (industrial), A249 (heat exchanger), A554 (decorative) |
| Outer diameter | Typical reference only: 6–406 mm round; squares 10×10–150×150 mm. Confirm the ordered range and supply route in the quotation. |
| Wall thickness | Typical reference only: 0.4–6.0 mm. Confirm the ordered range and supply route in the quotation. |
| Length | Typical reference only: 6 m standard, cut to length available. Confirm the ordered range and supply route in the quotation. |
| Finish | Mill, polished 180/320/400/600 grit, hairline |
| End condition | Plain, capped for polished tube |
| Commercial basis | Quantity, MOQ, production route and delivery schedule are confirmed for each quotation. |
Dimensions and Tolerances
| Thickness | Typical reference only: 0.4–6.0 mm. Confirm the ordered range and supply route in the quotation. |
|---|---|
| Length | Typical reference only: 6 m standard, cut to length available. Confirm the ordered range and supply route in the quotation. |
| Outer Diameter | Typical reference only: 6–406 mm round; squares 10×10–150×150 mm. Confirm the ordered range and supply route in the quotation. |
| Wall Thickness | Typical reference only: 0.4–6.0 mm. Confirm the ordered range and supply route in the quotation. |
| Order basis | Governing product and dimensional standard, delivery condition and any drawing-specific limits. |
| Special tolerances | Must be stated in the RFQ and accepted in the quotation before production. |
Published ranges are technical references, not a live-stock or production-capability promise. The final range, MOQ and delivery schedule are confirmed in the quotation.
Edge or end condition
- Plain, capped for polished tube; final condition as ordered.
Testing and inspection
- Tests required by the governing purchased standard.
- PMI, NDE, corrosion, roughness or other supplementary inspection only when specified and confirmed in the quotation.
Order documents
- Inspection document type and content as ordered.
- Heat or lot traceability and supplementary reports when included in the accepted inspection plan.
Export packaging
- Export packing selected for product form, finish, dimensions, weight and transport route.
- Film, caps, interleaving, skids, cases or moisture protection only as confirmed in the order.
Match the standard to the job
The same “304 pipe” phrase covers three different products. A554 is structural/decorative tube — ornamental railings, furniture — where surface finish rules. A312 is pressure-rated process pipe, supplied per NPS schedule with hydrostatic or eddy current testing. A249 covers thin-wall heat exchanger tube. Quote requests that name the standard get faster, more accurate pricing.
Polishing
Polishing from 180 to 600 grit or hairline can be reviewed against the requested sample and supply route. A 400-grit finish is commonly specified for railing work; 600 grit approaches mirror for interior applications. Individual sleeves and other surface protection must be specified and confirmed with the finish and packing route.
Related datasheets
See the 304 grade page for chemistry and equivalents; estimate order weight with the weight calculator.
Technical content updated: 2026-07-29
Organizational author: Tsingshan (Shandong) Iron & Steel Co., Ltd..Review method, status and limitations.
Typical Applications
Related technical resources
Grades
Published standards
Applicable standards
ASTM A312/A312M
What to Include in Your RFQ
Use the published values as a starting point, then identify the exact ordered option and acceptance criteria.
- Grade and governing standard
- 304; ASTM A312/A312M. State the exact ordered combination.
- Dimensions and tolerances
- Provide thickness, length, outer diameter, wall thickness and identify which order basis, special tolerances requirements govern acceptance.
- Finish, processing and edge or end condition
- Hairline; Stainless Steel Cut-to-Length and Leveling, Stainless Steel Polishing and Surface Finishing; Plain, capped for polished tube; final condition as ordered..
- Inspection, documents and packing
- Testing: Tests required by the governing purchased standard.; PMI, NDE, corrosion, roughness or other supplementary inspection only when specified and confirmed in the quotation. Documents: Inspection document type and content as ordered.; Heat or lot traceability and supplementary reports when included in the accepted inspection plan. Packing: Export packing selected for product form, finish, dimensions, weight and transport route.; Film, caps, interleaving, skids, cases or moisture protection only as confirmed in the order.
- Quantity, destination and requested delivery window
- State quantity per size, unit, delivery city or port, requested trade term and required delivery window so the supply and freight route can be confirmed.
Frequently Asked Questions
What information is needed to quote 304 Stainless Steel Welded Pipe?
Send the grade, governing standard, dimensions, tolerance, finish, quantity, testing, document, packing and destination requirements.
Are the listed 304 Stainless Steel Welded Pipe dimensions guaranteed available?
No. Published dimensions are technical references; actual availability, production route, MOQ and delivery schedule are confirmed for each quotation.
Which inspection documents are available for 304 Stainless Steel Welded Pipe?
State the required document type and supplementary tests in the RFQ. The exact document package is confirmed before the order is accepted.
RFQ
Request a Quotation
Send the specification you have; we will identify missing inputs before quoting.