304L Stainless steel pipe

304L Stainless Steel PipeWidely used in food & beverage processing, pharmaceuticals, chemical engineering, seawater desalination, HVAC and water treatment for fluid transportation and high-hygiene pipeline systems.

Classification ：

Stainless steel pipe

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2. Chemical Composition (Compliant with ASTM A240/A276)

Element	Content Range (%)	Element	Content Range (%)
Carbon (C)	≤0.03	Manganese (Mn)	≤2.00
Chromium (Cr)	18.00 - 20.00	Silicon (Si)	≤1.00
Nickel (Ni)	8.00 - 12.00	Phosphorus (P)	≤0.045
Sulfur (S)	≤0.030	Iron (Fe)	Balance

3. Physical & Mechanical Properties

Property	Parameter	Property	Parameter
Density	7.93 g/cm³	Tensile Strength	≥515 MPa
Melting Point	1398 - 1454 ℃	Yield Strength	≥205 MPa
Elongation	≥40%	Hardness (Brinell)	≤201 HB
Thermal Conductivity	15.2 W/(m·K)	Modulus of Elasticity	193 GPa

4. Product Specifications

4.1 Types & Standards

Type	Production Process	Applicable Standards
Seamless 304L Pipe	Hot rolling, cold drawing, cold rolling	ASTM A312, ASTM A269, GB/T 14976, EN 10217-1
Welded 304L Pipe	High-frequency welding, forming, annealing	ASTM A249, JIS G3446, GB/T 13296

4.2 Standard Sizes

Outer Diameter (OD): 6 mm - 630 mm (customizable for oversized sizes)
Wall Thickness (WT): 0.5 mm - 30 mm
Length: Random length (2-6m), fixed length (customized as required)
Surface Treatment: Pickling & passivation, bright annealing, hairline, mirror polishing (8K)

5. Core Advantages

Superior Corrosion Resistance: Low carbon content eliminates intergranular corrosion; resistant to weak acid, weak alkali, salt water, organic solvents and atmospheric corrosion.
Excellent Weldability: Low carbon design ensures stable welding performance, no need for post-weld annealing in most cases.
Food & Medical Grade: Non-toxic, odorless, smooth inner wall, easy to clean, meets food safety and medical hygiene standards.
High Temperature & Low Temperature Resistance: Stable mechanical properties at -196 ℃ to 870 ℃, suitable for extreme temperature environments.
Durable & Low Maintenance: Strong toughness, anti-rust, anti-scaling, long service life with minimal maintenance.

6. Main Application Fields

Food & Beverage Industry: Food delivery pipelines, brewing equipment, dairy processing pipelines (food grade).
Medical & Healthcare: Medical instrument pipelines, pharmaceutical production lines, sterile fluid transmission.
Petroleum & Chemical Engineering: Chemical fluid transportation, pipeline systems, oil refining auxiliary equipment.
Marine & Offshore Engineering: Seawater desalination, ship pipelines, coastal engineering structures.
HVAC & Water Treatment: Cold/hot water supply pipelines, environmental protection water treatment systems.
Other Fields: Pressure vessels, automotive exhaust systems, architectural decoration, furniture manufacturing.

7. Production Process

7.1 Seamless 304L Pipe

Raw material inspection → 2. Billet heating → 3. Hot piercing → 4. Hot rolling/cold drawing → 5. Annealing → 6. Pickling & passivation → 7. Size calibration → 8. Surface inspection → 9. Finished product packaging

7.2 Welded 304L Pipe

Stainless steel coil uncoiling → 2. Slitting & forming → 3. High-frequency welding → 4. Weld bead removal → 5. Annealing → 6. Internal/external polishing → 7. Inspection → 8. Packaging

8. Packaging & Shipping

Inner Pack: Moisture-proof paper, plastic film, anti-rust oil (for precision pipes)
Outer Pack: Plywood crates, wooden pallets, steel belts (reinforced for sea transportation)
Shipping: FCL/LCL, air freight (as per customer requirements); compliant with international export packaging standards to avoid damage during transportation.

9. Quality Control & Services

Strict inspection from raw materials to finished products: Chemical composition analysis, ultrasonic/eddy current flaw detection, dimensional accuracy testing, corrosion resistance test.
Customization: Custom OD, WT, length, surface treatment and special specifications.
Professional technical support: On-site guidance, process consultation, after-sales service.

Our complete lineup of steel pipes comes in every size, grade, and finish imaginable. Whatever your project demands, we have the perfect fit ready to ship.

FAQ

Q1. Are you a factory or trading company?

We are a direct manufacturer with our own production lines. Welcome factory audit and on-site inspection.

Q2. Can you provide free samples?

Yes, we offer free samples for quality testing. Customers only need to bear the shipping cost.

Q3. What’s your MOQ?

Low MOQ for standard products, trial orders are accepted. Larger quantity will have better unit price.

Stainless steel pipe