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Seamless Carbon Steel Pipe

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  • Material Grade: Q195 / Q235 / Q345 / S235 / S355
    Shape: Square / Rectangular
    Section Type: Hollow Section (SHS / RHS)
    Outer Size: 10×10mm – 500×500mm
    Wall Thickness: 0.6mm – 20mm
    Length: 6m / 12m / Customized
    Surface: Black / Galvanized / Oiled / Painted
    Standard: ASTM A500 / EN10219 / GB/T6728
    Technique: ERW / Cold Rolled / Hot Rolled
    Application: Construction, Furniture, Frame, Machinery
    Packing: Standard Seaworthy Export Packing
  • Material: Carbon Steel (API 5L X42 / X52)
    Standard: API 5L / ASTM A106 / ASTM A53
    Process: Seamless (SMLS)
    Size Range: 1/2" – 48" (DN15 – DN1200)
    Wall Thickness: Sch20 – Sch160 / STD / XS / XXS
    Surface: Black Painted / Varnish / Oiled / PE Coated
    Length: 6m / 12m / Custom
    Ends: Plain / Beveled / Threaded
    Application: Oil, Gas, Water, High-Pressure Pipeline
    MOQ: 3 Tons
    Delivery Time: 7–15 Days
  • Material: ASTM A106 Grade B (Carbon Steel)
    Standard: ASTM A106 / ASME B36.10 / API 5L
    Process :Seamless (SMLS)
    Size Range :1/2" – 24" (DN15 – DN600)
    Wall Thickness :Sch40 / Sch80 / Sch160
    Surface :Black Painted / PE Coated / Oiled / Bare
    Length :6m / 12m / Custom
    Ends :Plain End / Beveled End / Threaded
    Application :High Pressure / Fluid / Oil / Gas / Steam
    MOQ :3–5 Tons
    Delivery Time: 7–15 Days
  • Material: Carbon Steel (ASTM A106 / St37)
    Process: Seamless / Cold Rolled / Cold Drawn
    Outer Diameter: 6mm – 508mm (Customizable)
    Wall Thickness: 0.5mm – 25mm
    Length: 6m / 12m / Custom Cut
    Surface: Polished / Oiled / Pickled / Galvanized
    Standard: ASTM / DIN / EN / JIS / GB
    MOQ: 3–5 Tons
    Delivery Time: 7–15 Days
  • Material: Carbon Steel (Q235 / ASTM A106 / A53)
    Type: Seamless / Hot Rolled / Round Pipe
    Outer Diameter: 8mm (Customized Size Available)
    Wall Thickness: 0.8mm – 25mm
    Length: 6m / 12m / Custom Cut
    Surface: Black / Galvanized / Oiled / Pickled
    Standard: ASTM / JIS / EN / GB
    MOQ: 3 Tons
    Delivery Time: 7–15 Days
  • Material: ASTM A36
    Type: Hot Rolled / Welded / Round Pipe
    Outer Diameter: 20mm – 600mm
    Wall Thickness: 1.5mm – 25mm
    Length: 6m / 12m or Custom
    Surface: Black / Oiled / Galvanized
    Standard: ASTM / JIS / EN / GB
    MOQ: 3 Tons
    Delivery Time: 7–15 Days
  • Standard: ASTM A106 / ASTM A53 / API 5L
    Grade: A106 Gr.B / A53 Gr.B / API 5L Gr.B / X42–X70
    Outer Diameter: 10mm–1020mm
    Wall Thickness: 1.5mm–60mm
    Length: 5.8m / 6m / 12m 
    Technique: Hot Rolled / Cold Drawn / Cold Rolled
    Ends: Plain End, Beveled End
    Applications: Oil & gas transport, high-temperature pipelines, boilers, machinery
    Surface: Black, Oiled, Varnish, Anti-rust Coating
    Certificate: ISO, SGS, MTC
  • Material: Carbon Steel (ASTM A106 / ASTM A53 / API 5L).
    Standards: API 5L / ASTM A106 / ASTM A53 Grade B.
    Size: 6" nominal bore (Outer Diameter per SCH40 standard).
    Schedule: SCH40 (ANSI).
    Wall Thickness: SCH40 typical thickness for 6" ≈ 0.280" (7.11 mm) — customizable.
    Length: 5.8m / 6.0m / 12.0m / Cut-to-length (custom).
    Surface Coating: Hot-dip Galvanized / Epoxy Coating / Black Oiled.
    Ends: Plain End (PE) / Beveled End (BE) / Threaded (on request).
    Manufacture: Seamless (hot rolled / cold drawn as per requirement).
    Service: Suitable for high-pressure oil, gas and water pipelines (check grade & wall thickness for exact ratings).
    Certs: MTC, PMI on request, Hydrostatic Test, Third-party inspection (SGS/BV).
    Sales Models: Factory Direct / Wholesale / OEM.
    Min Order: 1 Ton / as negotiated.

️High-Quality Steel & Metal Products for Global Markets

At Haihong Steel, we supply a wide range of premium steel product and metal materials designed for construction, manufacturing, energy, and industrial engineering applications across the United States, Russia, Dubai and whole international markets.

Our metal solutions are produced using advanced manufacturing process controls to ensure superior mechanical properties, long life cycle, and reliable performance under high temperature and harsh working environments.

️Advanced Manufacturing & Heat Treatment Technology

Each steel product goes through controlled production. This includes melting, forming, and professional heat treatment. These steps improve strength, durability, and surface quality. Our strict process control ensures:

• Stable melting point consistency

• Improved structural performance

• Excellent electrical conductivities for special alloy products

• Enhanced resistance against chemical exposure such as sulfuric acid

️Corrosion Resistance and Surface Protection

Many of our products feature hot dip galvanizing with durable zinc coating, making them highly resistant to corrosion in outdoor, marine, and industrial environments. This protective layer significantly extends product life cycle while reducing maintenance costs — making it a common type of solution for infrastructure projects worldwide.

Mechanical Performance & Material Grades

We supply multiple grades of stainless steel and carbon steel engineered for different load capacities and operating conditions. Our metals offer: High strength levels, Excellent mechanical properties, Superior thermal stability, Long-term durability in demanding applications, Available in both bulk orders and small amount custom production..

Reliable Metal Supply for Global Projects

From structural steel beams to precision tubes and galvanized sheets, our product range covers nearly every industrial need. Whether you’re sourcing for construction, energy plants, machinery manufacturing, or transportation infrastructure, Haihong Steel delivers consistent quality with international shipping support...

Popular Industrial Metal Solutions

From structural beams and rolled steel coils to high-accuracy copper tubing and aluminum sheet stock — our product hub lets you rapidly find the perfect material to match your project requirements. If you don’t see your required specification, our OEM & ODM services allow custom production. Our product lines include:

• Stainless steel sheets, pipes & profiles

• Galvanized steel coils & plates

• Carbon steel beams & tubes

• Copper and aluminum industrial materials

• High-performance alloy steels

All products comply with international quality standards and customer specifications.

Get Exclusive Quotation

If you have customized mechanical equipment needs or want to learn more about the details of industry solutions, please feel free to contact us.
We will provide you with one-on-one professional services to start a new chapter of win-win cooperation!