304 Stainless Steel Pipe Supplier
Welded & Seamless, ASTM A312 TP304
MetalFromTurkey supplies 304 stainless steel pipe for general-purpose food, architectural, process and industrial piping requirements. We act as a Turkey-based stainless steel pipe supplier and exporter, giving buyers one RFQ process for welded and seamless 304 pipe from certified Turkish mills. Supply can include ASTM A312 TP304, 304/304L dual-certified material, EN 10216-5, EN 10217-7, UNS S30400, DIN/EN 1.4301 and EN 10204 3.1 MTC documentation where required.
Welded vs Seamless 304 Pipe
MetalFromTurkey can quote 304 pipe in welded and seamless forms. The right route depends on size, pressure class, wall thickness, inspection scope, surface requirement, lead time and the standard named in the MTO or drawing.
Welded 304 Pipe
Welded 304 pipe is usually the cost-effective option for general process piping, food equipment, architectural applications and utility lines where a longitudinal weld seam is acceptable. Common references include ASTM A312, ASTM A358 and EN 10217-7, depending on diameter, welding route and project specification. Specify welded 304 pipe when the project can accept a welded route and needs competitive pricing, documentation and schedule availability. Useful RFQ details include OD or NPS, wall thickness or schedule, length, surface finish, weld test requirement and MTC scope.
Seamless 304 Pipe
Seamless 304 pipe is selected when the project specification requires no weld seam, tighter integrity expectations, thermal cycling resistance or a seamless-only standard route. Common references include ASTM A312, ASTM A213 and EN 10216-5. Use seamless 304 pipe when the end-user standard or service condition requires it. Where welded pipe is technically acceptable, it may reduce cost and lead time. Our team can compare welded and seamless options when the RFQ includes service conditions and inspection expectations.
304 Grade, Chemistry & Size Reference
304 stainless steel pipe is the most widely used austenitic stainless pipe grade for general corrosion resistance, weldability and formability. It is a chromium-nickel stainless steel without intentional molybdenum addition, which makes it a practical choice for indoor food equipment, architectural pipework, utility lines and mild chemical process service. 304 is not the right answer for every environment. Where chlorides, salt air, de-icing salts or more aggressive cleaning chemicals are present, 316 or 316L may be a better specification. Many 304 pipe inquiries are quoted as 304/304L dual-certified material when the certified heat chemistry and mechanical properties meet both grade requirements. This helps buyers align older drawings, procurement lists and project specifications that may use TP304, TP304L or both. 304L is the low-carbon version of 304 and is commonly preferred when welded fabrication is expected and post-weld annealing is not planned.
304 vs 316: Quick Comparison
304 vs 316: Quick Comparison: Question, Usually Choose 304 / 304L, Usually Choose 316 / 316L.
| Question | Usually Choose 304 / 304L | Usually Choose 316 / 316L |
|---|---|---|
| Service environment | Indoor, food-grade, architectural or mild process service | Marine, coastal, chloride-bearing or chemical process service |
| Cost position | Typically lower alloy cost | Typically higher because of molybdenum |
| Welding need | 304L helps reduce sensitization risk | 316L helps when welding and chloride exposure combine |
Chemical Composition & PREN (ASTM A312 TP304 / TP304L)
Chemical Composition & PREN (ASTM A312 TP304 / TP304L): Element, TP304 Limit / Range, TP304L Limit / Range.
| Element | TP304 Limit / Range | TP304L Limit / Range |
|---|---|---|
| Carbon (C) | 0.08 max | 0.030 max |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Silicon (Si) | 0.75 max | 0.75 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.030 max | 0.030 max |
| Chromium (Cr) | 18.00-20.00 | 18.00-20.00 |
| Nickel (Ni) | 8.00-11.00 | 8.00-12.00 |
| Nitrogen (N) | 0.10 max | 0.10 max |
304 Pipe Size & Schedule Chart (NPS / DN, Sch 5S-80S)
304 Pipe Size & Schedule Chart (NPS / DN, Sch 5S-80S): NPS, DN, OD (mm), Sch 5S WT (mm), Sch 10S WT (mm), Sch 40S WT (mm), Sch 80S WT (mm).
| NPS | DN | OD (mm) | Sch 5S WT (mm) | Sch 10S WT (mm) | Sch 40S WT (mm) | Sch 80S WT (mm) |
|---|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 |
| 1" | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 2" | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 |
| 3" | 80 | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 4" | 100 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 6" | 150 | 168.3 | 2.77 | 3.40 | 7.11 | 10.97 |
| 8" | 200 | 219.1 | 2.77 | 3.76 | 8.18 | 12.70 |
| 12" | 300 | 323.8 | 3.96 | 4.57 | 9.53 | 17.48 |
| 24" | 600 | 610.0 | 4.78 | 6.35 | 17.48 | 30.96 |
Standards & Grade Equivalents
Standards & Grade Equivalents: Commercial Grade, ASTM / ASME, UNS, EN / DIN, JIS, Notes.
| Commercial Grade | ASTM / ASME | UNS | EN / DIN | JIS | Notes |
|---|---|---|---|---|---|
| 304 stainless steel pipe | ASTM A312 TP304 | UNS S30400 | 1.4301 | SUS304 | General-purpose chromium-nickel austenitic stainless |
| 304L stainless steel pipe | ASTM A312 TP304L | UNS S30403 | 1.4307 | SUS304L | Low-carbon route for welded fabrication |
| 304/304L dual-certified | Project-specific | S30400 / S30403 where certified | 1.4301 / 1.4307 where certified | Project-specific | Must be confirmed on the MTC |
| 304H stainless steel pipe | ASTM A312 TP304H | UNS S30409 | Project-specific | SUS304H where specified | Higher-temperature variant, reviewed by project need |
For engineering comparison, PREN is commonly estimated as %Cr + 3.3 x %Mo + 16 x %N. Because 304 does not contain intentional molybdenum, a typical 304 heat often falls around PREN 18-20. Use this as an orientation value, not as a substitute for corrosion design or project material selection. Availability depends on welded or seamless route, wall thickness, quantity, inspection scope and delivery term. Where chloride exposure or marine service is part of the specification, compare with 316L stainless steel pipe on the stainless steel pipe overview.
Why Source 304 Pipe from Turkey
Turkey can give 304 pipe buyers a practical balance of regional logistics, stainless processing capability and export documentation discipline.
Practical regional logistics
For European, Balkan, Caucasus and MENA destinations, Turkish supply can shorten the commercial route while keeping certificates, inspection and shipment terms clear.
One RFQ, multiple certified mills
MetalFromTurkey supports one RFQ process for welded and seamless 304 pipe. Buyers can compare suitable Turkish mill options, documentation scope and delivery terms without turning the inquiry into a long supplier-by-supplier search.
Standards, Equivalents & Certifications
304 pipe buyers often search by grade name, ASTM designation, UNS number or EN material number. Use the equivalents table above to align drawings, RFQs and mill test certificates before ordering. Documentation can include EN 10204 3.1 MTC, ISO 9001 evidence from the relevant supply route, PMI, hydrostatic test records, dimensional inspection, NDT reports and third-party inspection coordination when required. Standards must match product form: EN 10216-5 is the seamless route, while EN 10217-7 is the welded route.
Industries & Applications
304 stainless steel pipe is commonly used where general corrosion resistance, cleanability, weldability and cost control matter more than chloride resistance.
Food and beverage equipment
Process lines, utility pipework, washdown-adjacent areas and equipment assemblies where 304/304L is compatible with the cleaning chemistry.
Architectural and decorative pipework
Visible stainless pipe, handrail-related assemblies, indoor structures and mild outdoor installations where finish and formability matter.
General chemical and industrial service
Non-chloride process lines, utility systems, heat exchanger connections and equipment packages where project standards accept 304/304L.
Pricing & RFQ for 304 Pipe
304 stainless steel pipe is typically less expensive than 316/316L because it does not contain molybdenum. The exact price difference is project-dependent and changes with nickel and molybdenum markets, welded or seamless form, NPS or OD, wall thickness, surface finish, inspection scope, quantity and delivery term. For an accurate quote, send:
Grade
304, 304L or 304/304L dual-certified.
Form
Welded, seamless or precision tube.
Standard
ASTM A312, A213, A358, EN 10216-5, EN 10217-7 or project standard.
Size
NPS/DN, OD, schedule or wall thickness, length.
Quantity
Tons, meters or pieces per size.
Documentation
EN 10204 3.1 / 3.2, PMI, NDT, hydrotest or third-party inspection.
Delivery term and destination
FOB Turkish port, CFR, CIF or project-specific terms.
Common Questions
What is 304 stainless steel pipe?
304 stainless steel pipe is the most widely used austenitic stainless pipe grade, valued for good general corrosion resistance, weldability and formability. It contains no intentional molybdenum, making it suitable for food, architectural and general process service but less resistant to chlorides than 316/316L.
What are the disadvantages of 304 stainless steel?
304 has lower resistance to chlorides and pitting corrosion than 316/316L because it lacks molybdenum. It is not recommended for prolonged exposure to marine, de-icing salt or high-chloride environments unless the project corrosion review confirms suitability.
What is the difference between 304 and 316 pipe?
The key difference is molybdenum. 316 contains molybdenum, giving it better resistance to chloride pitting, while 304 does not. For marine, chemical process or de-icing salt exposure, specify 316 or 316L; for general indoor, food-grade or architectural use, 304 is usually sufficient and more cost-effective.
Which is cheaper, 304 or 316 stainless?
304 is typically less expensive than 316/316L because it does not contain molybdenum, which is a costlier alloying element. The exact price difference depends on current alloy markets, pipe form, schedule, quantity, inspection scope and delivery term.
What sizes and schedules are available?
304 stainless steel pipe can commonly be reviewed from NPS 1/2 inch to 24 inch, DN 15-600, in schedules such as 5S, 10S, 40S and 80S. Availability depends on welded or seamless form, wall thickness, quantity, inspection scope and delivery timing.
Need
304 Stainless Steel Pipe?
Send grade, form, standard, size, quantity, documentation and delivery term. We will return a mill-matched quotation with lead-time guidance.
Ready to shortlist
your 304 pipe supply?
Send the RFQ once with grade, form, standard, size, quantity, documentation and delivery term. That removes most of the commercial back-and-forth before mill comparison starts.
Üçevler Mah. İzmiryolu Cad. Westpoint İş Merkezi D Blok Kat:6 Ofis:118 No:241D Nilüfer BURSA / Türkiye