High-Pressure & High-Temperature Steel Pipes

Tianjin Brisk Steel is one of the manufacturers of High-Pressure & High-Temperature Steel Pipes in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.

 PRODUCT

Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe

HPHT applications demand specialized steel grades that maintain their mechanical properties at elevated temperatures (often exceeding 500℃ to 600℃) and under extreme pressures. Our product line is built around world-class standards:

• ASTM A335 (Chrome-Moly Alloy Steel): The industry standard for high-temperature service. Grades like P11, P22, P91, and P92 contain chromium for oxidation and corrosion resistance, and molybdenum for exceptional creep strength.
• ASTM A106 Grade B/C: Premium seamless carbon steel pipes optimized for high-pressure and high-temperature services in refineries and power plants.
• EN10216-2 : non-alloyed seamless steel tube of the circular hollow section for high-temperature and high-pressure applications. Grades like P195GH, P235GH, P265GH, 16Mo3.

1. Exceptional Creep Rupture Strength

Under prolonged high temperatures, lower-grade steels suffer from "creep"-a gradual, permanent deformation that leads to rupture. Our Chrome-Moly and stabilized stainless steel pipes are chemically balanced to resist creep deformation, ensuring decades of safe continuous service.

2. High Oxidation and Scaling Resistance

Elevated temperatures accelerate surface oxidation. The precisely controlled Chromium ($1.0\%$ to $9.0\%$) and Silicon content in our pipes forms a tight, protective oxide scale layer that prevents deeper atmospheric degradation.

3. Superior Dimensional Precision & Heavy Wall Thicknesses

High pressure requires robust wall thicknesses. We utilize advanced seamless piercing and heavy-wall extrusion processes to supply pipes up to SCH XXS and custom heavy wall profiles with minimal dimensional deviation.

4. Flawless Structural Uniformity

Because a single micro-fissure can cause catastrophic decompression, our HPHT pipes are strictly seamless. Eliminating the longitudinal weld seam entirely eliminates a major vulnerability point under high-pressure dynamics.

 

Technical Specifications & Product Range

 

Property / Parameter	Specification Range
Common Standards	ASTM A335, ASTM A106, ASTM A213, EN 10216-2
Popular Grades	P11, P22, P5, P9, P91, P92, A106B, A106C, 316H, 347H
Outer Diameter (OD)	1/4" to 36" (13.7mm – 914.4mm)
Wall Thickness (WT)	SCH 40, SCH 80, SCH 160, SCH XXS up to 100mm
End Configuration	Beveled Ends (for welding), Plain Ends, Treaded Ends
Surface Finish	Black Painting or Uncoated. With protective caps

 

Primary Applications

 

Our HPHT seamless steel pipes are highly trusted across critical global industrial sectors:

 

• Power Generation: Main steam piping systems, superheater tubes, and boiler headers in thermal and nuclear power plants.
• Petrochemical & Refining: Hydrocracking units, catalytic crackers, and distillation columns operating under immense heat and pressure.
• Chemical Processing: Transfer lines for high-temperature, highly volatile gases and corrosive chemicals.
• Oil & Gas Downstream: High-pressure gas processing facilities and deepwell exploration injection lines.

 

Quality Assurance & Destructive/Non-Destructive Testing

 

• 100% Non-Destructive Testing (NDT): Ultrasonic Testing (UT), Eddy Current Testing, and Hydrostatic testing calibrated to elevated pressure thresholds.
• Microstructure & Grain Size Analysis: Verified via metallurgical evaluation to ensure correct heat treatment (Normalizing, Quenching, and Tempering).
• Hardness & Tensile Testing: Confirmed at both ambient and simulated elevated service temperatures.

 

Frequently Asked Questions (FAQ)

 

FAQ

Q: What makes ASTM A335 P91 steel ideal for ultra-high temperature steam applications?

A: Grade P91 is a 9% Cr - 1% Mo alloy modified with vanadium and nitrogen. This specific combination drastically increases the material's creep strength and allows for much thinner wall designs compared to older grades like P22. Thinner walls translate to lighter structures, less welding filler metal, and a lower thermal fatigue rate during plant startup and shutdown cycles.

Q: What is the maximum temperature limits for ASTM A106 seamless carbon steel pipes?

A: While ASTM A106 can technically operate at temperatures up to 425℃ (800℉), prolonged exposure beyond 400℃ can lead to graphitization (carbide breakdown), which weakens the steel. For continuous services exceeding 400℃, alloy steels like ASTM A335 are highly recommended.

Q: How do you protect the interior and exterior of these heavy-wall pipes during ocean freight?

A: To prevent moisture-induced surface corrosion during maritime shipping, the pipes are coated with an environmentally stable anti-rust varnish or light protective oil. Ends are sealed with heavy-duty plastic or rubber caps to protect the machined welding bevels and keep the internal bore completely free of debris and sea salt.

Q: Can your mill handle custom heavy-wall thickness requests for custom high-pressure applications?

A: Yes. Aside from standard ASME/ANSI schedules, we feature specialized extrusion and deep-hole boring equipment to produce custom heavy-wall structural dimensions. Please share your design pressure (P) and temperature (T) data, and our engineering team can provide options that meet ASME Section I or Section VIII code rules.

 

If you are interested in our High-Pressure & High-Temperature Steel Pipes, please contact us with your specific requirements (specifications, quantity, material, surface treatment, etc.), and we will provide you with a detailed quotation and product sample as soon as possible. We look forward to establishing long-term cooperative relationships with you!!