High Precision 304 Stainless Steel Seamless Pipe Cold Rolled Corrosion Resistance
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
304 Stainless Steel Seamless Pipe
The 304 stainless steel seamless pipe is a globally recognized standard grade in the stainless steel family. With a chemical composition of 18% chromium and 8% nickel, it offers excellent corrosion resistance, high toughness, and outstanding formability. Manufactured using precision seamless cold-rolling technology, this pipe delivers a superior surface finish, tight dimensional tolerances, and consistent mechanical properties — making it the preferred choice for industries ranging from petrochemicals to food processing.
Unlike welded pipes, seamless pipes have no weld seam, ensuring higher pressure resistance and eliminating the risk of leakage along a welded joint. This makes the 304 seamless steel tube ideal for high-pressure, high-temperature, and corrosive environments.
Product Specifications
| Parameter | Details |
|---|---|
| Material Grade | 304 / 304L |
| Standard | ASTM A312, ASTM A213, ASTM A269, EN 10216-5, DIN 17458, JIS G3459, GB/T 14976 |
| Outer Diameter (OD) | 6 mm – 630 mm |
| Wall Thickness (WT) | 1 mm – 40 mm |
| Length | 3 m – 12 m, or as required (custom cutting available) |
| Surface Treatment | Annealed & pickled, bright annealing, mirror polish, hairline finish |
| End Finish | Plain ends, beveled ends, threaded ends |
| Packaging | In bundles, wooden cases, or end-capped with plastic plugs |
Custom sizes available upon request. Contact us for 304 stainless steel seamless pipe non-standard dimensions.
Chemical Composition
| Element | 304 (%) | 304L (%) |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 11.0 | 8.0 – 12.0 |
| Nitrogen (N) | ≤ 0.10 | ≤ 0.10 |
304L offers lower carbon content, providing better resistance to intergranular corrosion after welding — recommended for welded structures without post-weld annealing.
Key Advantages & Features
1. Superior Corrosion Resistance
The 18% chromium content forms a passive oxide layer on the surface, protecting the pipe from rust and oxidation in most atmospheric, chemical, and food environments.
2. Seamless Precision Rolling Process
Unlike welded pipes, seamless pipes are produced by piercing a solid billet and then cold rolling or cold drawing to the final dimensions. This process ensures:
- No weld seam defects
- Uniform wall thickness
- Smooth inner and outer surfaces
- High-dimensional accuracy
3. Excellent Mechanical Performance
High tensile and yield strength allow the pipe to withstand high pressure, vibration, and thermal cycling without failure.
4. Good Weldability and Formability
304 stainless steel can be easily welded (TIG, MIG, etc.) and formed into complex shapes without cracking.
5. Wide Temperature Range
Suitable for cryogenic applications (down to -196°C) as well as continuous service up to 870°C (intermittent up to 925°C).
Manufacturing Process
- Raw material selection – High-quality 304 stainless steel billet from certified mills.
- Heating & piercing – Billet is heated and pierced to form a hollow shell.
- Cold rolling/cold drawing – Multi-pass precision rolling to achieve exact OD, WT, and surface finish.
- Annealing – Solution annealing to eliminate internal stress and restore corrosion resistance.
- Pickling & passivation – Removes surface scale and enhances passive film.
- Straightening & cutting – To the final length and straightness tolerance.
- Inspection & testing – 100% dimensional check, hydrostatic test, eddy current / ultrasonic test available.
- Packaging – Anti-rust protection and secure export packaging.
Applications
Thanks to its balanced properties, the 304 seamless stainless steel pipe is widely used in industries that demand cleanliness, strength, and corrosion resistance.
Petrochemical Industry
- Transporting corrosive media (oil, gas, chemicals)
- Heat exchangers and condensers
- Refinery piping systems
Food & Beverage Industry
- Food processing equipment
- Dairy and brewery pipelines
- Storage tanks and sanitary piping
Medical & Pharmaceutical
- Surgical instruments
- Medical device tubing
- Cleanroom piping systems
Construction & Architecture
- Handrails, balustrades, and guardrails
- Structural supports
- Decorative stainless steel tubes
Mechanical Engineering
- Hydraulic and pneumatic cylinders
- Precision shafts and sleeves
- Machinery parts requiring high wear resistance
Marine Environment (with care)
- Suitable for fresh water and mild marine exposure
- For direct seawater contact, consider 316 stainless steel
Quality Control & Testing
We understand that pipeline failures can be costly. That's why every shipment undergoes strict quality checks:
| Test | Standard |
|---|---|
| Chemical analysis | Spectrometer |
| Tensile test | Universal testing machine |
| Flattening test | ASTM A450 |
| Flaring test | ASTM A450 |
| Hydrostatic test | Optional, up to the pressure required |
| Eddy current / Ultrasonic test | Optional, non-destructive |
| Dimensional inspection | Micrometer, caliper, laser gauge |
| Surface inspection | Visual + endoscope for the inner surface |
Mill test certificates are provided with every shipment, traceable to the heat number.
FAQ – Frequently Asked Questions
Q: What is the difference between 304 and 304L seamless pipe?
A: 304L has lower carbon content (≤0.03%), which reduces the risk of intergranular corrosion after welding. For thin-walled pipes or non-welded applications, standard 304 is sufficient.
Q: Can you provide polished 304 seamless pipes?
A: Yes. We offer various finishes, including mirror polish (8K), hairline (HL), and brushed finish.
Q: What is the maximum length you can supply?
A: Standard length is up to 12 meters. Longer lengths are available by special order.
Q: Do you offer third-party inspection?
A: Yes. We can arrange an inspection by SGS, BV, TUV, or any other third-party agency at your cost.
Q: What is your MOQ?
A: No strict MOQ for standard sizes. Small trial orders are welcome.
Contact Us
Request a 304 Stainless Steel Seamless Pipe quote today – Send us your required size (OD x WT) and quantity. We will reply within 24 hours.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal