Boiler Tube
why choose us?
TORICH INTERNATIONAL LIMITED is a professional steel pipe material manufacturer and exporter with more than 20 years of experience. Our factory covers an area of more than 50,000 square meters. We have professional production equipment and complete testing equipment.
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Boiler Tube
Boiler steel pipes, made from 20G carbon steel, 15CrMo alloy steel, and 304/316L stainless steel, comply with ASTM A106/A213 standards. They offer high temperature (≤650°C), pressure (≤35MPa), and corrosion resistance, making them ideal for superheaters, reheaters, economizers, and industrial boilers. Precision processes ensure reliability for energy, chemical, and power industries.
Product Advantages
High Temperature
Boiler steel pipes are designed to withstand high temperatures and pressures, making them ideal for use in environments where steam and hot water are generated and transported. This resistance ensures safety and reliability in operations.
Corrosion Resistance
These pipes are often made from materials that resist corrosion, such as stainless steel or alloy steel. This characteristic is crucial for maintaining the integrity of the pipes over time, especially when exposed to water and steam, which can be corrosive.
Durability and Longevity
Boiler steel pipes are built to last, offering excellent durability. Their robust construction reduces the need for frequent replacements, thereby lowering maintenance costs and downtime in industrial settings.
Efficient Heat Transfer
The materials used in boiler steel pipes are chosen for their ability to efficiently transfer heat. This property is vital for the effective operation of boil
Products Applications
01
Power industry boiler system
Boiler tubes are used in the power industry to manufacture high-pressure boiler components in thermal power plants, such as superheater tubes, reheater tubes, main steam pipes, etc.
02
Petrochemical Equipment
In the petrochemical industry, boiler tubes are used in reactors, heat exchangers, pipelines and other equipment.
03
Production & Shipping
In ship boilers and power systems, boiler tubes are used in key components such as steam generators and heat exchangers.
04
Aerospace
In the aerospace field, boiler tubes are used in high-temperature gas furnaces, heat exchangers and other equipment, requiring the material to be lightweight and resistant to high temperature and high pressure.
Boiler Tube Production Process
Material Selection and Inspection
Material Standards: High-quality carbon steel, alloy steel, or stainless steel bars conforming to ASTM, GB, and other standards are selected, ensuring the chemical composition (such as C, Mn, Si, Cr, etc.) meets the requirements.
Inspection Items: Spectral analysis, mechanical property testing, and surface quality inspection are performed to eliminate raw materials with defects such as cracks or inclusions.
Cutting and Blanking
Method: Saw cutting or plasma cutting is used to avoid excessive heat-affected zones, ensuring smooth ends.
Size Control: Cut to the appropriate length, typically between 1-5 meters, for subsequent processing.
Heating and Piercing
Heating Furnace: The material is uniformly heated to 1100-1250°C (depending on the material) in a ring-type furnace to ensure plasticity.
Piercing Process: Skew-rolling piercing (e.g., Mannesmann piercing mill) is used to transform solid bars into hollow billets, controlling the wall thickness deviation to ≤±5%.
Hot Rolling
Rolling Mill: A continuous or automatic pipe mill is used for multi-pass rolling to reduce the wall thickness and extend the pipe, forming a near-finished size billet.
Temperature Control: The final rolling temperature must be above the material's recrystallization temperature to avoid work hardening.
Sizing and Straightening
Sizing Machine: The outer diameter is precisely controlled using a tension reducing machine, with a tolerance of ±0.5mm.
Straightening: A rotary straightening machine is used to eliminate bending, ensuring straightness error ≤1.5mm/m.
Heat Treatment
Process Selection: Normalizing (900-950°C) to improve microstructure uniformity; tempering (600-700°C) to relieve stress; quenching + tempering (for alloy steel) to increase strength.
Cooling Control: Accelerated cooling refines the grain structure and enhances creep resistance.
Surface Treatment
Descaling: Shot blasting or acid pickling (using hydrochloric acid or sulfuric acid solution) is applied to remove surface oxides.
Anti-corrosion Treatment: A coating of anti-corrosion oil or phosphating is applied for long-term storage.
Precision Testing
Dimensional Testing: Laser diameter gauges and ultrasonic thickness gauges are used to monitor the outer diameter and wall thickness in real-time.
Mechanical Properties: Tensile testing (tensile strength, yield strength) and Charpy impact testing.
Non-destructive Testing:
Ultrasonic Testing: Detects internal cracks and inclusions.
Eddy Current Testing: Identifies surface and near-surface defects.
Hydrostatic Testing: The pipe is tested at 1.5-2 times the working pressure, with a pressure hold for 10-15 seconds without leakage.
Metallographic Analysis: Uses a microscope to observe grain size and non-metallic inclusion levels.
Finishing and Marking
Cutting to Length: The pipe is cut to the customer's specified length using a flying saw or band saw, with a tolerance of ±2mm.
Marking: Laser engraving is used to mark material grade, specifications, furnace number, and standards.
Packaging and Shipping
Packaging Method: Bundling (with corner protectors), wooden crates (for precision tubes), or pallet packaging, with a waterproof membrane on the outer layer.
Documentation: A quality certificate (MTC), third-party inspection reports (e.g., SGS, BV), and a packing list are provided.
Logistics Management: Nylon slings are used during lifting to prevent scratching, and the goods are fixed and shock-proof during transportation.
Key Quality Control Points
Piercing Eccentricity: To ensure uniform rolling, the eccentricity must be controlled within 0.3mm.
Heat Treatment Curve: Precise recording of the heating rate and holding time is necessary to avoid overheating or insufficient heating.
Inspection Coverage: 100% non-destructive testing ensures defect-free delivery.
TORICH INTERNATIONAL LIMITED is a professional steel pipe material manufacturer and exporter with more than 20 years of experience. Our factory covers an area of more than 50,000 square meters. We have professional production equipment and complete testing equipment. Professional production (seamless steel pipes, welded steel pipes, DOM steel pipes, capillary tubes), etc. Proficient in (cold drawn cold rolled hot fire eddy current) etc. And our team will also provide various customized services OEM&ODM. We also have good service and after-sales capabilities. We can provide you with competitive prices and high-quality products in the market. We can deliver the goods faster than others. destination.
Founded in
years experience
Covered area
Existing employees
Certifications
CE-1
CE-2
CE-3
ISO9001-1
ISO9001-2
TS16949
FAQ
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We're well-known as one of the leading boiler tube manufacturers and suppliers in China. Please feel free to wholesale high quality boiler tube for sale here from our factory. For price consultation, contact us.
superheater tubes