Boiler Steel Pipes — Seamless Tubes for Medium & High-Pressure Service
Boiler steel pipes are engineered to carry high-temperature, high-pressure steam and water in power generation, petrochemical and industrial boilers. Depending on service severity, materials range from cost-effective carbon steel for medium-pressure systems to Cr-Mo alloy steels with excellent creep strength and oxidation resistance for high-pressure, high-temperature duty. Seamless hot-rolled or cold-drawn manufacturing with grade-appropriate heat treatment ensures dimensional accuracy, pressure integrity and long service life.
Manufactured for power, petrochemical, and industrial boiler systems handling steam and hot water under pressure.
Meets ASTM/ASME, DIN, JIS, and EN standards covering medium to high-pressure service classes.
Available in carbon and Cr-Mo alloy steels with normalized, tempered, or annealed heat treatments.
Inspected by hydrostatic, NDT (UT/ET), tensile, hardness, and dimensional tests to ensure long-term reliability.
Boiler Steel Pipes — High-Temperature Strength & Pressure Integrity
- High-Temp Capability: Cr-Mo alloy grades designed for ≥ 450 °C high-pressure service with creep strength.
- Oxidation & Corrosion Resistance: Grade-dependent resistance for boiler atmospheres and process media.
- Pressure Integrity: Seamless construction + hydrostatic & NDT qualification for leak-tight performance.
- Dimensional Accuracy: Cold-drawn tubes offer tight tolerances and smooth finish for efficient heat transfer.
- Flexible Supply: Cut-to-length, beveling, UT/ET, mechanical tests, EN 10204 3.1 material certificates available.
Description
Medium-pressure boiler systems typically use carbon steel (e.g., ASTM A179/A192/A210) for reliable strength at temperatures up to ~450 °C. For high-pressure and higher-temperature duty, Cr-Mo alloy steels (e.g., ASTM A209/A213/A335) provide improved creep strength, thermal stability and oxidation resistance, enabling long-term operation in superheaters, reheaters and high-stress boiler circuits. Grade selection balances pressure/temperature windows, fabrication needs and corrosion environment.
Pipes are produced as seamless hot-rolled or cold-drawn tubes, followed by grade-appropriate heat treatment (normalized / tempered / annealed) to achieve specified mechanical properties. Quality controls include chemical analysis, tensile / yield / elongation, hardness limits, flattening / flaring, hydrostatic testing, and NDT such as ultrasonic or eddy-current. Dimensional inspection and surface checks ensure tolerance compliance; full traceability and EN 10204 3.1 certificates are available.
- Broad material portfolio from carbon to Cr-Mo alloys to match medium- and high-pressure boiler duty.
- Grade-dependent creep strength and oxidation resistance for sustained high-temperature service.
- Seamless construction, tight dimensional control and verified pressure integrity.
- Comprehensive NDT + mechanical testing program; documented traceability and certificates.
- Flexible supply with cut-to-length, beveling and export-grade protective packing.
| Manufacturing | Seamless hot-rolled / cold-drawn |
|---|---|
| Size Range (OD) | 10 – 762 mm (extended OD possible for certain A213 / A335 piping) |
| Wall Thickness (WT) | 1 – 50 mm (DIN up to ≈ 80 mm) |
| Length | 5 – 12 m (typ. 5.8 / 6 / 11.8 / 12 m); custom available |
| Heat Treatment | Normalized / tempered / annealed (per grade) |
| Ends | Plain / beveled; caps & beveling on request |
| Testing | Hydrostatic; UT / ET; tensile / yield / elongation; hardness; flattening / flaring; dimensional |
| Certificates | EN 10204 3.1; PMI & additional testing on request |
| Standard | Description / Typical Grades |
|---|---|
| ASTM A179 | Seamless low-carbon steel tubes for heat exchangers / condensers; low-to-medium pressure / temperature. |
| ASTM A192 | Seamless carbon steel boiler / superheater tubes for high-pressure service. |
| ASTM A209 | Seamless carbon-molybdenum alloy steel (T1 / T1a); boilers / superheaters, moderate-to-high temperature. |
| ASTM A210 | Seamless medium-carbon steel boiler / superheater tubes (A1 / C); medium pressure. |
| ASTM A213 | Seamless ferritic / austenitic alloy steel boiler, superheater & heat-exchanger tubes (e.g., T11 / T22 / T91); high-temperature. |
| ASTM A335 | Seamless ferritic alloy steel piping (e.g., P11 / P22 / P91) for high-temperature service. |
| DIN 17175 | Seamless tubes for elevated temperatures in boiler installations & pressure vessels (e.g., St35.8 / 15Mo3). |
| JIS G3461 | Carbon steel tubes for boilers & heat exchangers (e.g., STB340); low-to-medium pressure. |
| JIS G3462 | Alloy steel tubes for boilers & heat exchangers (e.g., STBA22); high-temperature / high-pressure. |
Note: Size / thickness limits vary by standard and grade; final selection per design code and inquiry.
Specifications Sheet
The following table lists standard nominal pipe sizes (NPS) and wall thickness (Schedule) in accordance with ASME B36.10 / B36.19. Alland Steel manufactures seamless boiler and alloy steel pipes conforming to ASTM A179, A192, A210, A213, and A335 standards, covering both tube and piping dimensions for medium- and high-pressure service.
Main Applications
Boiler steel pipes are used to convey high-temperature and high-pressure steam and water in power generation, petrochemical and industrial boiler systems. Depending on the service conditions, carbon steel grades are used for medium-pressure operation, while Cr-Mo alloy steels are selected for high-pressure and high-temperature duty, ensuring strength, creep resistance and long-term reliability.
Power Station Boilers
Used in waterwall, superheater, reheater and economizer sections for steam generation and circulation.
Petrochemical Process Heaters
Cr-Mo alloy grades applied in refinery and petrochemical heater coils operating under severe thermal conditions.
Heat Exchangers & Condensers
Low- and medium-pressure carbon steel tubes (A179/A192) used for efficient heat transfer and compact design.
Power & Utility Piping
Steam and feedwater piping in power plants requiring precise tolerance and high integrity under cyclic pressure.
Industrial Boilers & HRSG Units
Applied in high-efficiency and waste-heat recovery systems for continuous operation and temperature cycling.
Advantages
- High-Temperature Strength: Cr-Mo alloy grades designed for sustained service at ≥ 450 °C with excellent creep resistance.
- Corrosion & Oxidation Resistance: Suitable for steam atmospheres, flue gas and process media depending on grade.
- Seamless Reliability: Hot-rolled or cold-drawn manufacturing ensures uniform wall thickness and structural integrity.
- Dimensional Precision: Cold-drawn finish provides tight tolerance and smooth inner surface for efficient heat exchange.
- Comprehensive QC: Hydrostatic, UT/ET, mechanical tests, full traceability and EN 10204 3.1 certificates available.
Packing & Transportation
Boiler steel pipes are packed to prevent corrosion, deformation and end damage during handling and shipment, ensuring safe delivery to site.
- Bundle or Frame Packing: Pipes bundled with steel straps or wooden frames; ends capped and coated with anti-rust oil, wrapped in plastic or woven fabric.
- Container Shipment: For lengths up to 6 m (20′) or 12 m (40′ HC); smaller tubes can be crated or palletized for protection.
- Bulk / Breakbulk Transport: For large OD or heavy bundles; placed on wooden saddles, covered with multilayer wrapping and labeled with markings and certificates.