Outer Diameter: 10–108mm | Internal Ra ≤0.6μm. Premium sanitary-grade 304 welded & seamless pipes engineered for dairy, beverage, and water treatment lines. Zero-residue interior finish ensures absolute hygiene and CIP efficiency.
| Element | Content (%) | Analysis of Functions in Food-Grade Applications |
|---|---|---|
| C | ≤0.07 | Low-carbon design reduces the risk of intergranular corrosion in welding and meets the material stability requirements in high-temperature sterilization scenarios. |
| Cr | 17.5–19.5 | Chromium promotes the formation of a protective passive oxide layer, helping improve corrosion resistance in food, beverage, and general process environments. |
| Ni | 8.0-10.0 | Nickel helps stabilize the austenitic structure and contributes to the material's toughness, formability, and corrosion resistance. |
| Physical Properties | Density 7.93g/cm³, melting point 1398-1454℃, thermal conductivity 16W/(m·K), suitable for food processing environments with alternating hot and cold conditions. |
|---|---|
| Mechanical Properties | Yield strength ≥205MPa, elongation ≥40%, capable of withstanding a hydraulic test at 1.5 times the design pressure (test pressure 15BAR, no leakage after 30 minutes of pressure holding). |
| Chemical Properties | In 3.5% sodium chloride solution, pitting potential ≥+300mV; crevice corrosion resistance is 15% better than that of ordinary 304 welded pipes. |
| Outer Diameter Range | 10-108mm (tolerance ±0.1mm for ≤50mm; ±0.2mm for >50mm). |
|---|---|
| Wall Thickness Range | 0.8-6.0mm (tolerance ±5%), with common specifications of 1.2mm, 1.5mm, and 2.0mm. |
| Length Specifications | Fixed length 6m (tolerance ±5mm), customizable to 3-12m, and coil pipes are available (outer diameter ≤38mm, coil diameter ≥1.5m). |
| Surface Treatment | Inner wall mechanical polishing (Ra≤0.6μm) + outer wall 2B/BA (Ra≤0.8μm), with customizable electrolytic polishing (inner wall Ra≤0.4μm). |
| Welding Process | Automatic TIG welding (internal weld reinforcement ≤0.1mm), with post-weld degreasing and passivation treatment (nitric acid concentration 20-25%). |
| Nominal Size | OD (mm) | Wall Thickness (mm) | Weight (kg/m) | Schedule Equivalent |
|---|---|---|---|---|
| 3/8" | 17.1 | 1.2 | 0.46 | 10S |
| 1/2" | 21.3 | 1.5 | 0.71 | 10S |
| 3/4" | 26.7 | 1.5 | 0.91 | 10S |
| 1" | 33.4 | 2.0 | 1.54 | 10S |
| 1.5" | 48.3 | 2.0 | 2.27 | 10S |
| 2" | 60.3 | 2.0 | 2.86 | 10S |
| 2.5" | 76.1 | 2.5 | 4.49 | 10S |
| 3" | 88.9 | 3.0 | 6.32 | 40S |
| 4" | 108.0 | 3.0 | 7.77 | 40S |
Custom OD, wall thickness, and fixed lengths available on request. Minimum order: 50 m for stock sizes, 100 m for custom.
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Size: 38×2.0mm × 6m (In stock for fast delivery).
Advantageous Data: Inner wall Ra ≤0.6μm, CIP cleaning efficiency increased by 30%.
Typical Cases: Widely supplied for dairy and beverage processing lines across Southeast Asia and the Middle East.
Size: 76×3.0mm×12m.
Advantageous Data: Withstands 135℃ high-temperature sterilization, zero intergranular corrosion.
Typical Cases: Trusted by commercial food and beverage tank manufacturers in Asia.
Size: 60–108mm series
Advantageous Data: High corrosion resistance for tropical/arid environments; full MTC and third-party inspection compliance.
Typical Cases: Supplied for municipal water treatment and beverage bottling plants in Nigeria, Kenya, and GCC regions.
304 is the standard choice for dairy, brewing, food processing, building water supply, and general industrial fluid systems — it meets FDA and NSF requirements and handles most CIP/SIP cleaning protocols. 316 (with 2% molybdenum) is the right upgrade when the process fluid contains chlorides above 200 ppm, salt water, or concentrated acids — such as pharmaceutical brine lines, seawater desalination systems, or aggressive chloride-based sanitizers. For the majority of food and beverage applications, 304 delivers equivalent hygiene performance at a lower cost per metre.
Need custom cutting, polished lengths, or CIF shipping rates to your local port? Chat with our engineers on WhatsApp for an instant quotation within 2 hours.
Common sizes (19–57 mm) available in stock; minimum order 50 m
Custom sizes: MOQ ≥100 m, delivery 15–20 days
Export-ready packaging and full traceability with Mill Test Reports
Walmay will help match the right stainless product form and specification for your application, confirm quantities and packing needs, and provide requested documents based on order requirements.
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