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Help CenterSteel Pipe & Tube & High Pressure Boiler Tube，20G、15CrMoG、12Cr1MoVG、10Cr9Mo1VNbN
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1. Product Overview
High Pressure Boiler Tube is a premium seamless steel tube specially designed for high-pressure, high-temperature and high heat-load working conditions, serving as a professional pressure-bearing pipeline material for power station boilers. Manufactured from high-quality carbon steel and chromium-molybdenum-vanadium heat-resistant alloy steel, it adopts sophisticated processes including external furnace refining, vacuum degassing, hot rolling piercing, precision sizing, integral heat treatment and 100% non-destructive testing. The tube features high strength, excellent long-term creep performance, superior high-temperature oxidation resistance, stable metallographic structure and reliable pressure and explosion resistance. It can operate stably for a long time under extreme conditions of 450℃–650℃ and steam pressure above 9.8MPa without deformation, tube bursting or corrosion failure. Our factory supplies a full range of products including 20G high-pressure boiler tubes, 12Cr1MoVG alloy high-pressure boiler tubes, 15CrMoG and 10Cr9Mo1VNbN heat-resistant boiler tubes. Widely applied in power station boilers, superheaters, reheaters, economizers, water walls, headers and high-temperature & high-pressure steam transmission pipelines, it is a core pressure-bearing material for thermal power, cogeneration and chemical thermal engineering projects.
2. Product Classification
Classified by material system, heat resistance grade and working pressure,High Pressure Boiler Tubes are divided into three core categories, fully covering conventional high-pressure, supercritical and ultra-supercritical high-end boiler working conditions:
1. Carbon Steel High Pressure Boiler Tube: Dominated by 20G grade, it is a premium carbon heat-resistant seamless steel tube with uniform metallographic structure, high purity, excellent welding and bending performance and stable pressure resistance. Suitable for medium and high-temperature & pressure parts of conventional high-pressure boilers such as water walls, economizers and low-temperature superheaters, it features high cost performance and wide applicability, acting as the basic and mainstream pressure-bearing tube for power plants.
2. Alloy High Pressure Boiler Tube: Mainly made of Cr-Mo and Cr-Mo-V series heat-resistant alloy steel, including grades 15CrMoG, 12Cr1MoVG and 10Cr9Mo1VNbN. Reinforced by chromium, molybdenum, vanadium and niobium alloy elements, it greatly improves high-temperature creep strength, thermal fatigue resistance and high-temperature oxidation resistance. Capable of withstanding ultra-high temperature, ultra-high pressure and alternating thermal load impact for long-term service, it is applicable to rigorous core parts such as high-temperature superheaters, high-temperature reheaters and main steam pipelines.
3. High-end Heat-resistant High Pressure Boiler Tube: Adopting high-chromium martensitic heat-resistant steel, it possesses outstanding high-temperature resistance, creep resistance and oxidation resistance. It matches supercritical and ultra-supercritical large generator units, large chemical heating furnaces and high-end thermal equipment, meeting the demands of long-cycle and high-load continuous operation.
3. Implementation Standards & Material Grades
All High Pressure Boiler Tubes are produced in strict accordance with national mandatory standards for special boiler tubes and international power station pipeline standards. Chemical composition, mechanical properties, high-temperature durability, metallographic structure, non-destructive testing and hydraulic tests are fully controlled throughout production to ensure stable batch performance. Complete original MTC material certificates are provided to meet the acceptance standards of key power plant, thermal and chemical projects as well as export orders:
Implementation Standards: GB/T 5310-2017 Seamless Steel Tubes for High Pressure Boilers; Supporting Standard: GB/T 3087; International Standards: ASME SA106, SA210, SA213, EN10216, DIN17175
Main Carbon Steel Grades: 20G, suitable for conventional high-pressure boilers, thermal pipelines and general high-pressure heat exchange systems
Main Low-alloy Heat-resistant Steel Grades: 15CrMoG, 12Cr1MoVG, core materials for high-temperature sections of power plant boilers with excellent creep resistance and thermal stability
Main High-alloy Heat-resistant Steel Grades: 10Cr9Mo1VNbN, adapted to supercritical units and ultra-high temperature & pressure working conditions
All our high-pressure boiler tubes adopt LF external furnace refining + VD vacuum degassing technology with extremely low impurity and gas content. Free of internal porosity, interlayers, cracks and pinholes, the tubes feature uniform structure after heat treatment, effectively eliminating hidden dangers such as tube bursting, leakage and deformation during boiler operation and ensuring safe and stable operation of generator units.
4. Specification Parameters
4.1 Outer Diameter & Wall Thickness Range
Conventional outer diameter: 16mm–630mm; Conventional wall thickness: 3mm–120mm; Covering a full specification system of thin-wall heat exchange tubes, medium-thick wall pressure-bearing tubes and thick-wall high-pressure main pipelines. Thin-wall tubes are mostly used for economizers and water walls; medium-thick wall tubes for superheaters and reheaters; large-diameter thick-wall tubes for headers and main high-pressure steam pipelines. Non-standard caliber and wall thickness customization is supported.
4.2 Standard Length
Standard fixed lengths: 6000mm, 9000mm, 12000mm. Custom multiple lengths and cut-to-size processing are available to reduce on-site welding joints and material loss, adapting to modular boiler installation and pipeline prefabrication construction.
4.3 Delivery Status & Testing Standards
Uniform heat treatment delivery: normalizing, normalizing + tempering, quenching + tempering to eliminate rolling stress and stabilize metallographic structure. Every tube undergoes hydraulic testing and 100% ultrasonic non-destructive testing. Thin-wall tubes comply with U2-level flaw detection standards, while thick-wall tubes adopt high-grade flaw detection standards. The tube surface is smooth without oxide peeling, cracks or folds, featuring high dimensional accuracy, excellent roundness and straightness, and can be directly processed with beveling, welding and installation.
5. Core Product Advantages
1. Excellent High-temperature, High-pressure and Creep Resistance: Scientifically proportioned special heat-resistant materials deliver high long-term high-temperature strength, avoiding plastic deformation and creep failure under long-term high-temperature and high-pressure conditions, and adapting to continuous full-load operation of generator units.
2. High Purity and Ultra-high Safety: Vacuum degassing and refining process ensures few internal impurities and dense & uniform structure, providing stable pressure resistance, outstanding thermal shock and fatigue resistance, and eliminating safety accidents such as boiler tube bursting and leakage.
3. Superior High-temperature Oxidation and Corrosion Resistance: Alloy series boiler tubes possess excellent resistance to oxidation and corrosion caused by high-temperature flue gas and steam, avoiding inner wall rusting, scaling and perforation during long-term operation, and greatly extending equipment maintenance cycles and service life.
4. Good Weldability and Machinability: The tubes feature moderate toughness and good plasticity with strong adaptability to beveling, bending and welding processes. No cracking or deformation occurs after welding, suitable for prefabrication and on-site installation of power plant pipelines.
5. Full-inspection Quality and Stable Stock Supply: Each batch passes full tests on mechanical properties, metallography, non-destructive performance and hydraulic pressure. Conventional specifications are in sufficient stock, and special heat-resistant materials can be scheduled for production to meet the construction schedule requirements of key projects.
6. Main Application Scenarios
1. Thermal Power Plants and Cogeneration Plants: As core materials for power station boilers, high-pressure boiler tubes are widely used in key pressure-bearing parts including water walls, economizers, superheaters, reheaters, headers and main steam pipelines, matching various small, medium and large generator units.
2. Supercritical / Ultra-supercritical Unit Projects: High-alloy heat-resistant high-pressure tubes such as 12Cr1MoVG and 10Cr9Mo1VNbN are applied to high-temperature and high-pressure systems of ultra-high parameter units to meet rigorous continuous operation requirements.
3. Chemical and Petrochemical Thermal Equipment: Used for chemical heating furnaces, high-pressure heat exchange equipment and high-temperature steam transmission pipe networks, resisting high-temperature corrosion and high-pressure impact of chemical media.
4. Metallurgical and Building Material Thermal Systems: Applied to high-pressure steam pipelines supporting industrial high-temperature boilers, waste heat recovery boilers and kilns to realize waste heat utilization and stable heat supply.
5. New Energy and Thermal Pipe Network Projects: Suitable for high-temperature and high-pressure main pipelines of large-scale centralized heating and pressure-bearing pipe fittings of energy storage heat exchange systems with high safety and stability.
6. Overseas High-end Industrial Projects: Can be produced in accordance with American and European standards with complete material reports and third-party test certificates, adapting to supporting orders of overseas power stations, thermal engineering and high-pressure equipment.
7. Processing Methods
1. Fixed-size Cutting and Blanking: Precise fixed-size sawing and custom cutting are available to remove defective pipe ends, ensure flat pipe openings and support pipeline prefabrication and assembly.
2. Bevel Processing: Professional equipment is adopted to machine V-type and U-type welding bevels with flat and uniform chamfers, meeting the welding standards for high-pressure pipeline butt joints and ensuring weld tightness and pressure-bearing safety.
3. Pipe Bending Forming: Support cold bending and hot bending for customized elbow fittings to adapt to complex boiler pipeline layouts and reduce on-site welding procedures.
4. Non-destructive Re-inspection and Precision Straightening: Finished products can undergo secondary flaw detection and straightening correction to ensure qualified straightness and roundness and eliminate installation deviations.
8. Packaging, Quality Inspection & Delivery
1. Packaging Standards: Pipe openings of finished high-pressure boiler tubes are sealed with plastic protectors. The tube surface is derusted and anti-rust treated with multi-layer waterproof packaging and reinforced steel strip binding with classified marking. Export orders adopt fumigated wooden pallet reinforcement suitable for container ocean transportation to prevent collision, corrosion and pipe end deformation.
2. Quality Inspection Guarantee: Each batch undergoes chemical composition analysis, tensile & impact mechanical tests, high-temperature performance detection, metallographic structure analysis, tube-by-tube hydraulic test and 100% ultrasonic flaw detection. Original factory MTC certificates are provided to support SGS, BV third-party re-inspection and acceptance, fully complying with power station project access standards.
3. Delivery Cycle: Conventional specifications of 20G, 15CrMoG and 12Cr1MoVG are in sufficient stock and delivered within 3–7 working days; large-diameter thick-wall and high-alloy special materials are delivered within 7–15 working days.
4. Logistics Distribution: Support full-truck and LCL domestic transportation directly to construction sites, and port container loading, complying with FOB, CIF and other international trade terms for stable and efficient delivery.
9. Storage & Usage Precautions
1. High-pressure boiler tubes shall be stored in dry, ventilated, moisture-proof and dust-proof indoor warehouses with elevated stacking. Open-air exposure to rain and water immersion is strictly prohibited to avoid pipe end corrosion and inner wall oxidation peeling that affect welding and pressure-bearing performance.
2. Tubes of different materials and heat resistance grades shall be stacked and marked separately. Mixing of 20G carbon steel tubes with 12Cr1MoVG and 15CrMoG alloy tubes is forbidden to eliminate potential safety hazards caused by incorrect material selection for high-temperature working conditions.
3. Soft slings shall be used for hoisting and handling. Direct friction and collision of steel wire ropes with pipe openings and tube bodies are prohibited to prevent pipe end deformation and tube wall scratches, ensuring sealing accuracy and overall quality of high-pressure pipelines.
4. Pipeline processing, welding and installation shall strictly follow high-pressure boiler pipeline construction specifications. Forced assembly and misalignment installation are prohibited. Non-destructive re-inspection shall be conducted after welding to ensure the safety of pressure-bearing systems.
5. Regular anti-rust maintenance and quality sampling inspection shall be carried out for long-term inventory tubes. Tubes with corrosion, deformation or unqualified flaw detection are forbidden to be used in core high-pressure boiler working conditions.
10. Supporting Derivative Products
- 20G High Pressure Boiler Tube: Carbon steel high-pressure boiler tube with high cost performance and excellent machinability, suitable for heat exchange and general high-pressure pipeline systems of conventional high-pressure boilers
- 15CrMoG Alloy Boiler Tube: Medium-temperature heat-resistant alloy tube with stable structure and corrosion resistance, widely used for medium and high-temperature pipelines of power plant high-pressure boilers
- 12Cr1MoVG High Pressure Alloy Tube: Core high-end heat-resistant material with outstanding creep resistance and high-temperature resistance, adapted to high-temperature superheating and reheating core systems of large-scale power stations
- Super High Temperature Resistant Boiler Tube: High-chromium-vanadium-niobium alloy material, suitable for supercritical units and ultra-high parameter high-temperature & high-pressure rigorous working conditions
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