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Stainless Steel Pipes | 304L/316L Food-Grade Sanitary Tubes

$1,200.00 SGD

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Quantity 1 - 29 tons 30 - 99 tons >= 100 tons

Thickness 1-50mm

Stainless Steel Pipes | 304L/316L Food-Grade Sanitary Tubes

Product Overview

Stainless steel pipes and fittings are engineered for superior performance in demanding environments. Our seamless 304L/316L stainless steel pipes are specifically designed for food-grade and sanitary applications, offering exceptional corrosion resistance, high-temperature stability, and compliance with global hygiene standards. Manufactured under strict quality controls, these pipes are ideal for industries such as food processing, pharmaceuticals, dairy, and beverage production.

Technical Specifications

Property	304L	316L
Material Grade	UNS S30403 / EN 1.4306	UNS S31603 / EN 1.4404
Outer Diameter (OD)	6–219 mm (seamless/welded)	6–219 mm (seamless/welded)
Wall Thickness	0.25–8.0 mm	0.25–8.0 mm
Length	6 m (standard) or customized	6 m (standard) or customized
Hardness (HV)	≤200	≤220
Tensile Strength	≥485 MPa	≥485 MPa
Yield Strength	≥170 MPa	≥170 MPa
Elongation	≥30%	≥30%
Temperature Resistance	Up to 400°C (752°F)	Up to 450°C (842°F)
Surface Finish	Bright Annealed, Mirror, Pickled	Bright Annealed, Mirror, Pickled

Key Attributes

Corrosion Resistance
- 316L: Enhanced with 2–3% molybdenum, it resists pitting and crevice corrosion in chloride-rich environments (e.g., dairy cleaning solutions, seawater).
- 304L: Low carbon content prevents carbide precipitation during welding, ideal for high-temperature sterilization processes.
Hygienic Design
- Smooth internal surfaces minimize bacterial adhesion, meeting FDA and 3-A Sanitary Standards for food-grade applications.
Versatility
- Compatible with stainless steel flex pipe systems for complex installations and corrugated stainless steel pipe for thermal expansion management.

Manufacturing Process

Stage	Description
Material Selection	High-purity chromium (16–18%), nickel (10–14%), and molybdenum alloys (for 316L).
Cold Drawing	Precision cold drawing ensures seamless construction and uniform wall thickness.
Heat Treatment	Solution annealing at 1050–1100°C to optimize grain structure and corrosion resistance.
Surface Polishing	Electrolytic polishing (Ra ≤0.8 μm) for ultra-smooth surfaces.
Quality Assurance	Hydrostatic testing, ultrasonic inspection, and third-party certifications (ISO 9001, SGS).

Detailed Performance Analysis

1. Tensile & Bend Strength

Tensile Strength: Both grades exceed 485 MPa, ensuring structural integrity under high-pressure conditions. The low carbon content in 304L minimizes intergranular corrosion risks in welded joints.
Bend Strength: Seamless construction allows for tight-radius bending (up to 1.5x OD) without cracking, critical for stainless steel flex pipe systems in confined spaces.

2. Weight Calculation

Use the formula:
$Weight (kg/m) = \frac{( O D - W T ) \times W T \times 0.0248}{1000}$
Example: For a 50 mm OD pipe with 2 mm wall thickness:
$Weight = \frac{( 50 - 2 ) \times 2 \times 0.0248}{1000} = 2.38 kg/m$

3. Identification Marking

Laser Etching: ASTM/EN standards, material grade (e.g., "316L"), heat number, and size.
Color Coding: PVC sleeves for quick identification in industrial settings.

4. Causes of Stainless Steel Rust

Chloride Exposure: Prolonged contact with saltwater or acidic cleaners can cause localized pitting.
Improper Maintenance: Residual organic contaminants (e.g., milk proteins) accelerate oxidation. Use pH-neutral detergents for cleaning.
Mechanical Damage: Scratches from stainless steel pipe cutter tools may expose raw metal to corrosive agents. Always use deburring tools post-cutting.

Applications

Food & Beverage: Transporting dairy, juices, and brewing ingredients.
Pharmaceuticals: Hygienic transfer of APIs (Active Pharmaceutical Ingredients).
Marine Systems: Corrugated stainless steel pipe for fuel lines and exhaust systems.

Why Choose Our Stainless Steel Pipes?

As leading stainless steel pipe suppliers, we guarantee:

Certified Compliance: Meets ASTM A270 (sanitary), EN 10357, and ISO 2037 standards.
Custom Solutions: Tailored bending, thickening, and threading services for unique layouts.
Eco-Friendly: 100% recyclable material with ISO 14001 environmental management.
Global Logistics: Fast delivery via sea/air from Wuxi, China, with PVC-protected packaging.
Lifetime Support: Technical guidance on welding, maintenance, and stainless steel pipe cutter best practices.

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Stainless Steel Pipes | 304L/316L Food-Grade Sanitary Tubes