Seamless Straight pipe/tube

​TOKO TECH offers a full range of Seamless Straight pipe/tube

Grade: TP304L/H,TP316L/H/Ti, 321/H, 317L, 347H, 310S, N8904(904L), S31803,S32205,S32750,etc.

Standard: ASTM A312, ASTM A213, ASTM A269, ASTM A790, ASTM A789, GOST9941, EN10216-5,etc.

​Out diameter range: 4mm -711mm

Wall thickness range: 0.6-80mm

Surface finish: Annealed &Pickled; bright annealed &Polished

Annealed&Polished; Annealed & Pickled &Sandblasting.

Core Advantages

​Quality Assurance: Full compliance with ASTM/EN standards; material certificates and third-party testing provided.

​Flexible Production: Customizable OD (4-711mm) and wall thickness (0.6-80mm); 30-45-day lead time.

​Global Expertise: Exported to 50+ countries; familiarity with BS, DIN, ANSI standards.

For product catalogs, samples, or tailored solutions, contact our team for further assistance

1.Material Options

​304/304L Stainless Steel

Austenitic stainless steel with 18% Cr and 8% Ni, offering excellent corrosion resistance for food processing, architectural decor, and general piping systems.

304L (low carbon, ≤0.03% C) enhances weldability and prevents intergranular corrosion.

​316/316L Stainless Steel

Contains 2-3% Mo for superior chloride resistance, ideal for marine environments, chemical equipment, and medical applications.

316L’s low carbon content suits high-temperature welding (e.g., desalination pipelines, pharmaceutical systems).

​Duplex Steel (2205/2507)

Combines austenitic and ferritic structures with high Cr (22-25%), Ni (4-7%), and Mo (3-4%). Twice the strength of 304, with exceptional stress corrosion resistance for oil/gas pipelines and subsea engineering.

​Special Alloys (904L, 6Mo)

Ultra-high resistance to acids (e.g., sulfuric, phosphoric), designed for chemical processing and industrial corrosion-prone environments.

​2. Size Options 

Small Diameter (6-50mm)

• Wall Thickness: 0.5-5mm
• Applications: Precision instruments, medical devices. Requires high dimensional accuracy (±0.1mm).

Medium/Large Diameter (114-630mm)

• Wall Thickness: 5-40mm
• Applications: Oil/gas transmission, thermal power pipelines. Pressure rating ≥10MPa.

Custom Specifications

• Supports non-standard OD/wall thickness for unique equipment or ultra-high-pressure systems.

​3. International Standards

​ASTM A312/A269: U.S. standard for seamless/welded pipes, covering dimensions and mechanical properties.

​EN 10216-5: EU standard for high-temperature/pressure seamless pipes.

​JIS G3459: Japanese standard for dimensional and surface quality.

​Certifications

ISO 9001, PED (Pressure Equipment Directive), GOST9941, and third-party test reports available.

​4. Surface Treatments

​Mill-Grade Finishes

​Bright Annealed (BA): Smooth surface (Ra ≤0.8μm), oxide-free, for precision instruments.

​Acid Pickling & Passivation (AP): Removes oxides and forms a corrosion-resistant layer for industrial use.

​Polishing

​Mechanical Polishing (MP): Achieves Ra ≤0.4μm for food/pharmaceutical-grade pipes.

​Electropolishing (EP): Ultra-smooth finish (Ra ≤0.1μm), reducing bacterial adhesion in sanitary applications.

​Sand Blasting

Uniform matte surface (Ra 1.6-3.2μm) for enhanced coating adhesion in chemical pipelines.

​5. Industry-Specific Solutions

​Oil & Gas Industry

​Recommended: 316L/Duplex 2205

​Applications: Oil/gas transport, downhole tools. Resists H₂S/CO₂ corrosion; pressure rating up to 50MPa.

​Food & Pharma Industry

​Recommended: 316L (Electropolished)

​Applications: Dairy/brewery transfer lines, pharma equipment. Complies with 3-A Sanitary Standards for easy sterilization.

​Architectural Design

​Recommended: 304/316 (Mirror Polished)

​Applications: Handrails, curtain wall supports. Custom shapes and 8K surface finishes available.

​Chemical & Environmental

​Recommended: 904L/6Mo Alloy

​Applications: Acid storage tanks, exhaust scrubbers. Resists 98% sulfuric acid and mixed acids.

​Marine Engineering

​Recommended: Duplex 2507

​Applications: Seawater cooling systems, offshore platforms. Over 20-year lifespan in chloride-rich environments.

​Automotive Manufacturing

​Recommended: 304 (Precision Welded)

​Applications: Exhausts, fuel lines. Tight tolerances (±0.1mm); laser-cut customization supported.