HRSG (Heat Recovery Steam Generators) super long boiler tube

We are a leading manufacturer and supplier of super long boiler tubes designed for HRSG (Heat Recovery Steam Generators) in combined cycle power plants. These tubes are engineered for high pressure, high temperature, and corrosive environments, ensuring superior heat transfer efficiency and long service life.

Our HRSG boiler tubes are produced using advanced seamless manufacturing technology, meeting international standards such as ASTM, ASME, EN, and DIN, and can be supplied in extra-long lengths to reduce weld joints, installation time, and potential leakage risks.

Technical Specifications

• Product: Super Long Boiler Tubes / HRSG Tubes

• Standards: ASTM A192, ASTM A210, ASTM A213 (T11, T22, T91, T92), ASME SA213, EN 10216-2, DIN 17175

• Outer Diameter: 19 mm – 101.6 mm (3/4” – 4”)

• Wall Thickness: 2 mm – 25 mm

• Length: Up to 30 meters in single length (customizable)

• Manufacturing Process: Hot-rolled seamless, cold-drawn seamless, U-bending available

• End Finish: Plain end, beveled end, or as per client requirement

• Testing: Hydrostatic Test, Eddy Current Test, Ultrasonic Test, NDT

In combined cycle, waste heat of turbine will be recycled by HRSG and generates steam to generate electricity. HRSG super long tubes are main components of HRSG.

Main steel grades of HRSG superlong tubes

SA210A1、SA210C、SA192、SA213-T11、SA213-T12、SA213-T22、SA213-T91、SA213-T92、20G、15CrMoG、12Cr1MoVG、P235GH、13CrMo4-5 ect..

HRSG SIZE SCOPE : 26~65（OD）*2.4~7（WT）

HRSG SUPER LONG TUBES LENGTH: 16-26M (MAX L = 28M)

Materials & Grades

• Carbon Steel: SA192, SA210 A1, C

• Low Alloy Steel: SA213 T11, T12, T22

• Creep-Resistant Alloys: SA213 T91, T92, T122

• Stainless Steel & Nickel Alloys: TP304H, TP316H, Incoloy 800H, Inconel 625 (for critical HRSG sections)

Why Super Long Tubes for HRSG?

In Heat Recovery Steam Generators (HRSGs), the use of super long seamless boiler tubes offers multiple technical and operational advantages compared to conventional short-length tubing:

1. Fewer Weld Joints

   • Super long tubes (up to 30m) minimize the number of welds in HRSG modules.

   • Fewer welds mean lower risk of leakage, cracking, and weld failure under high-temperature, high-pressure conditions.

2. Improved Reliability & Safety

   • Long tubes eliminate weak points caused by multiple weld joints.

   • Enhanced reliability in critical sections like superheater, reheater, and economizer tubes.

3. Higher Efficiency

   • Continuous tubes provide better heat transfer performance.

   • Reduced thermal resistance and uniform gas-to-tube contact ensure maximum energy recovery from turbine exhaust.

4. Reduced Installation Time & Cost

   • Fewer joints mean less on-site welding and inspection work, reducing installation time and labor costs.

   • Simplifies construction in large HRSG units.

5. Extended Service Life

   • Seamless super long tubes offer better creep strength and fatigue resistance.

   • Longer life cycle reduces maintenance and shutdown costs.

6. Cleaner Tube Bundles

   • Continuous tube design improves gas flow patterns.

   • Minimizes fouling and scaling, leading to better performance and easier cleaning.