5″ Stainless Steel Welded Pipe 304

As a leading ​stainless steel welded pipe supplier, we provide premium ​304 stainless steel welded pipe solutions designed for durability, corrosion resistance, and versatility. Whether you need to ​buy stainless steel welded pipe for industrial, architectural, or commercial applications, our 304-grade pipes meet the highest global standards. This guide offers in-depth technical data, performance insights, and practical knowledge to help you select the right product.

​Technical Specifications

​Mechanical & Functional Properties

​1. Tensile Strength

The ​304 stainless steel welded pipe delivers a ​minimum tensile strength of 515 MPa (75,000 psi), making it ideal for high-stress applications like hydraulic systems, chemical processing, and structural frameworks. Its austenitic structure, enriched with 18% chromium and 8% nickel, ensures exceptional resistance to deformation under pressure.

​2. Bend Strength

With a ​bend strength of 205 MPa (30,000 psi), these pipes withstand repeated bending without cracking. This ductility allows for easy fabrication into coils, arches, or custom shapes, perfect for automotive exhausts, handrails, and HVAC ducting.

​3. Identification Standards

Pipes are marked per ​ASTM A312/A999 guidelines, including:

• ​Grade (304/304L)
• ​Heat Number
• ​Manufacturer’s Logo
• ​Size (OD × Wall Thickness)
  Laser etching ensures permanent traceability for quality audits and compliance.

​4. Weight Calculation Formula

Calculate the weight of a ​304 stainless steel welded pipe using:
Weight (kg/m) = (OD – Wall Thickness) × Wall Thickness × 0.02491
Example: For a 3″ OD pipe (76.2mm) with 0.15″ (3.81mm) wall thickness:
(76.2mm – 3.81mm) × 3.81mm × 0.02491 ≈ ​6.72 kg/m

​5. Why Does Stainless Steel Rust?

Despite its corrosion-resistant properties, 304 stainless steel may rust under specific conditions:

• ​Chloride Exposure: Prolonged contact with seawater, bleach, or de-icing salts damages the chromium oxide layer.
• ​Mechanical Abrasion: Scratches or improper cleaning expose the base metal to oxidation.
• ​High-Temperature Oxidation: Sustained temperatures above 800°F (427°C) reduce corrosion resistance.
• ​Galvanic Corrosion: Contact with carbon steel or copper in moist environments accelerates rusting.

​Applications of 304 Stainless Steel Welded Pipes

• ​Oil & Gas: Transporting corrosive fluids, offshore platforms, and refinery pipelines.
• ​Construction: Structural supports, handrails, and architectural cladding.
• ​Food & Beverage: Hygienic tubing for dairy, brewing, and pharmaceutical systems.
• ​Automotive: Exhaust systems, fuel lines, and emission control components.
• ​Energy: Solar thermal systems, heat exchangers, and nuclear power plants.

​Manufacturing Process & Quality Assurance

Our ​304 stainless steel welded pipe is produced through rigorous steps:

1. ​Material Selection: Cold-rolled 304 stainless steel coils are inspected for chemical composition.
2. ​Forming: Coils are shaped into cylindrical profiles using high-precision rollers.
3. ​Welding: TIG or laser welding ensures seamless, spatter-free joints with X-ray testing for integrity.
4. ​Heat Treatment: Solution annealing at 1900–2050°F (1038–1121°C) eliminates internal stresses.
5. ​Surface Finishing: Pickling, passivation, or polishing enhances aesthetics and corrosion resistance.
6. ​Testing: Hydrostatic pressure tests, eddy current inspections, and hardness checks guarantee compliance.

​Why Choose Us?

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As a trusted ​stainless steel welded pipe supplier, we differentiate ourselves through:

✅ ​Uncompromised Quality
All pipes comply with ASTM, ASME, and ISO standards, accompanied by mill test certificates.

✅ ​Customization Capabilities
Tailored solutions for dimensions, thickness, surface finish, and packaging.

✅ ​Competitive Pricing
Cost-effective pricing for bulk orders without sacrificing quality.

✅ ​Global Shipping
Efficient logistics via air, sea, or land with real-time tracking and DDP/DAP options.

✅ ​Technical Expertise
24/7 support for welding guidelines, load calculations, and project planning.

✅ ​Sustainability Focus
Eco-friendly manufacturing and 100% recyclable materials.

When you ​buy stainless steel welded pipe from us, you invest in reliability, innovation, and long-term performance.