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OEM Wholesale Sch20, Sch40, SCH80 round stainless steel pipes, 316L, 410, 420, 430, 409, 304, 316 seamless stainless steel pipes Manufacturer, Suppliers

Stainless steel pipes come in three primary types: round, square, and rectangular, with mainstream grades of 201, 304, and corrosion-resistant 316L (the top choice for harsh environments). Available surface finishes include 2B, brushed, and mirror; wall thickness spans 0.3–12mm, while square/rectangular pipes range 10–200mm in width. Standard length is 6m, with custom sizes on offer. Ideal for decoration, fluid transport, and framing, they blend lasting durability with sleek aesthetics.

Product Description

Stainless Steel Pipes

Stainless steel pipes, including round, square, and rectangular types, are essential in diverse industries, with mainstream grades 201, 304, and 316L. Grade 316L excels in corrosion resistance for harsh environments. Their core advantages lie in strong corrosion resistance, high tensile strength, and good ductility—able to withstand pressure, moisture, and temperature fluctuations. They are also easy to cut, weld, or bend for customization, with sleek finishes (2B, brushed, mirror) blending functionality and aesthetics, boasting a longer service life than carbon steel pipes.

🏗️ Construction

Used for curtain wall supports, handrails, and architectural structures.

💧 Fluid Transport

Relied upon for water, oil, or chemical pipelines, especially corrosive fluids.

⚙️ Machinery

Employed as equipment frames and high-strength mechanical components.

Installation requires pre-treatment, including degreasing and derusting the surface. Connection methods depend on scenarios: welding for high-pressure pipelines, threaded joints for easy disassembly, and flanges for chemical systems to prevent leaks. In use, avoid direct contact with carbon steel to prevent galvanic corrosion; outdoor pipes need expansion joints for thermal expansion and contraction.

Round Stainless Steel Pipes
Seamless Stainless Steel Pipes

Product Parameters

Item Category Specifications & Details
Material TypeStainless steel square tube pipe
ShapesSquare tubes, rectangular tubes, round tubes
Thickness0.08mm - 100mm
Size RangeRound: 2mm-20320mm; Square: 5mm-2000mm; Rectangular: 10x20mm to 120x180mm
Surface FinishPolishing, annealing, pickling, bright
TechnologyHot rolling / Cold rolling
Steel Grade304, 304L, 309S, 310S, 316, 316Ti, 317, 317L, 321, 347, 201, 202, etc.
StandardASTM A213, A312, A269, DIN 17456, JIS G3459, EN10216, GB13296
ToleranceOD: +/- 0.5mm; Thickness: +/- 0.05mm; Length: +/- 5mm
TestingSquash test, extended test, water pressure test, crystal rot test
MOQ1 Ton
ApplicationsDecoration, Construction, Upholstery, Water supply, Furniture

Packing And Shipping

Maintenance is straightforward: clean with neutral detergent daily; remove minor rust with specialized removers then re-passivate; check connections quarterly for tightness. Store in dry, ventilated areas to avoid moisture-induced rust, ensuring long-term reliable performance.

Stainless Steel Pipe Packing
Shipping Preparation

Frequently Asked Questions

Which stainless steel grade is best for corrosion resistance?
Grade 316L is highly recommended for harsh and corrosive environments as it excels in corrosion resistance compared to 201 or 304 grades.
What are the common application areas for these pipes?
Common applications include construction (handrails, curtain walls), fluid transport (water, oil, chemicals), machinery frames, and municipal projects like street light poles.
What connection methods can be used for installation?
Depending on the requirement, you can use welding for high-pressure systems, threaded joints for easy disassembly, or flanges for chemical systems to prevent leaks.
How should I maintain stainless steel pipes to ensure longevity?
Clean regularly with neutral detergent, inspect connections quarterly, and store in dry, ventilated areas. If minor rust appears, use specialized removers and re-passivate.
What precautions should be taken to prevent galvanic corrosion?
Avoid direct contact between stainless steel pipes and carbon steel components during installation and storage.
What finishes are available for the pipes?
Standard finishes include 2B, brushed, and mirror finishes, allowing for both functional and aesthetic applications.

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