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EN 10216-2 Seamless Steel Tubes

EN 10216-2 Seamless Steel Tubes

High-temperature Service

En 10216-2 seamless steel tubes deliver superior strength, heat resistance, and pressure durability for demanding boiler and heat exchanger systems.

EN 10216-2 Seamless Steel Tubes

High-temperature Service

En 10216-2 seamless steel tubes deliver superior strength, heat resistance, and pressure durability for demanding boiler and heat exchanger systems.

EN 10216-2 Seamless Steel Tubes are high-quality non-alloy and alloy steel tubes designed for pressure purposes under elevated temperature conditions, offering excellent corrosion resistance and high strength. Conforming to the EN 10216-2 standard, these seamless steel tubes are engineered for applications such as boiler tubes, heat exchangers, and pressure vessels in industries like power generation, petrochemicals, and oil and gas. Available in grades like P195GH, P235GH, P265GH, 16Mo3, 13CrMo4-5, and 10CrMo9-10, they provide robust mechanical properties for high-temperature environments up to 450°C.

Manufactured through seamless processes, EN 10216-2 Seamless Steel Tubes can be hot or cold finished, followed by heat treatments like normalizing or normalizing plus tempering to optimize their microstructure for strength and toughness. Available in outer diameters from 10.2mm to 711mm and wall thicknesses from 1.6mm to 100mm, with lengths fixed (6m, 9m, 12m, 24m) or random (5-12m), they meet diverse project specifications. Surface treatments like varnishing, 3LPE, or FBE coatings enhance corrosion resistance, while plain, beveled, or threaded ends ensure easy integration into industrial piping systems.

The Seamless Steel Tube undergoes rigorous testing, including chemical analysis, tensile tests at elevated temperatures, impact tests, and leak-tightness tests (hydrostatic or electromagnetic), to ensure compliance with EN 10216-2 standards for test categories TC1 and TC2. With tensile strengths ranging from 360-700 MPa (e.g., P235GH: 360-500 MPa) and minimum yield strengths from 195-265 MPa, these tubes offer reliable performance in high-pressure and high-temperature conditions. Their corrosion resistance and ability to withstand thermal stress make them ideal for transporting hot liquids and gases in boiler tubes and heat exchangers.

Compatible with fittings and flanges conforming to standards like EN 10253-2 or ASTM A234, EN 10216-2 Seamless Steel Tubes integrate seamlessly into complex industrial piping networks. Their versatility extends to applications in power plants, chemical processing, and mechanical engineering, where high-temperature strength and durability are critical. Compared to EN 10216-1 tubes, these tubes are optimized for elevated temperatures, offering superior performance in demanding environments like petrochemical plants and boiler systems.

Engineered to address challenges like thermal expansion and corrosion in high-temperature systems, EN 10216-2 Seamless Steel Tubes provide a reliable, durable solution for engineers seeking high-performance boiler tubes and industrial piping. Their seamless construction ensures enhanced pressure-bearing capacity, making them indispensable for safety-critical applications in power generation and industrial processes.

Chemical Composition of EN 10216-2 Seamless Steel Tubes (P235GH Example)
Element Composition (%)
Carbon (C) ≤0.16
Silicon (Si) ≤0.35
Manganese (Mn) 0.60-1.20
Phosphorus (P) ≤0.025
Sulfur (S) ≤0.020
Chromium (Cr) ≤0.30
Molybdenum (Mo) ≤0.08
Nickel (Ni) ≤0.30
Copper (Cu) ≤0.30
Aluminium (Al) ≥0.020
Mechanical Properties of EN 10216-2 Seamless Steel Tubes (P235GH Example)
Property Value
Tensile Strength, min-max (MPa) 360-500
Yield Strength, min (MPa) 235
Elongation, min (%) 25 (Longitudinal)
Impact Test, min (J at 0°C) 27 (Longitudinal, TC2)
Comparison of EN 10216-2 Seamless Steel Tubes with Other Pipe Grades
Feature EN 10216-2 P235GH EN 10216-1 P235TR2 EN 10216-5 X2CrNiMo17-12-2
Material Type Non-Alloy Steel Non-Alloy Steel Stainless Steel
Temperature Range Elevated (up to 450°C) Room Temperature Low to High (-196°C to 600°C)
Notch Toughness Moderate Moderate (27 J at 0°C) Superior (60 J at -196°C)
Corrosion Resistance Good (With coatings) Good (With coatings) Excellent (Inherent)
Applications Boilers, Heat Exchangers, Petrochemical Water Supply, Gas Lines Chemical, Cryogenic, Food Processing
Tensile Strength (MPa) 360-500 360-500 500-700
Yield Strength (MPa) 235 (min) 235 (min) 200 (min)
Key Advantage High-temp performance Cost-effective for room temp Superior corrosion resistance

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What are Non-alloy Steel Tubes

Non-alloy steel tubes are manufactured from steel primarily composed of iron and carbon, with little or no significant alloying elements. These tubes are widely used for general-purpose structural and mechanical applications.

Cost-Effective Performance

The absence of expensive alloying elements makes these steel tubes highly economical, ideal for basic mechanical strength and forming applications.

Superior Weldability

Low carbon content ensures excellent weldability with minimal preheating, suitable for standard fabrication and construction needs.

Key Characteristics

  • Primarily composed of iron and carbon
  • Minimal or no alloying elements
  • Excellent ductility and machinability
  • Lower production and material costs
  • Applicable in a wide range of industries

Manufacturing Processes

  • Hot rolling and forming
  • Cold drawing for precision tubes
  • Electric resistance welding (ERW)
  • Seamless tube extrusion
  • Dimensional and material quality testing
 Non-alloy Steel Tubes
FAQ

Non‑alloy (carbon) steel tubes are made from steel containing primarily iron and carbon, with minimal alloying elements. They offer basic mechanical properties, cost-effectiveness, and ease of formability :contentReference[oaicite:1]{index=1}.

They are produced by hot rolling or cold drawing, and may be seamless or welded. Standards like EN 10216‑1 specify heat-treated seamless tubes for pressure usage :contentReference[oaicite:2]{index=2}.

Common standards include:
  • EN 10255 – welded/threaded tubes :contentReference[oaicite:3]{index=3}
  • EN 10216‑1 – seamless, room-temperature pressure tubes (TR1/TR2) :contentReference[oaicite:4]{index=4}
  • DIN 1629 – seamless circular tubes for general mechanical purposes :contentReference[oaicite:5]{index=5}

Typical OD ranges from ~10 mm to 165 mm per EN 10255 :contentReference[oaicite:6]{index=6}. Available in light, medium, heavy schedules, with finish options like plain, threaded, socketed, bare, varnished, or galvanized :contentReference[oaicite:7]{index=7}.

They are used widely in:
  • Plumbing, HVAC, fire-sprinkler systems
  • Mechanical engineering
  • Boiler water tubes and heat exchangers (via EN 10216‑1) :contentReference[oaicite:8]{index=8}
  • Oil/gas pipelines and structural components :contentReference[oaicite:9]{index=9}

Standards require testing like tensile strength and threading compliance. Optional surface treatments include varnish, galvanizing, or oil to prevent rust :contentReference[oaicite:10]{index=10}.

Industrial Applications

EN 10216-2 Seamless Steel Tubes is widely used in industries requiring excellent high-temperature, high-pressure, and corrosion-resistant performance.

Construction

Structural framework, scaffolding systems, HVAC ducting, and infrastructure applications.

Automotive

Chassis components, exhaust systems, fuel lines, and suspension components.

General Engineering

Machinery manufacturing, conveyor systems, hydraulic cylinders, and material handling.

Pressure Applications

Boiler applications, heat exchangers, process industries, and power generation systems.

Key Application Benefits

15–30% Cost Reduction
Excellent Weldability
Superior Formability

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