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Product Info
Seamless Steel Tubes For Low-pressure And Medium Pressure Boilers
The seamless steel tubes for low-pressure and medium pressure boilers are made of high-quality carbon structural steel perforated and cold drawn. In addition to ensuring chemical composition and mechanical properties, water pressure tests, edge rolling, expansion, flattening and other tests must be conducted. It can be used to manufacture various low and medium pressure boiler tubes, superheated steam tubes, boiling water tubes, water-cooled wall tubes, as well as superheated steam tubes, large smoke tubes, small smoke tubes, and arch brick tubes for locomotive boilers.The following is a detailed introduction to this type of product:
Applicable Environment
Working temperature: Medium low temperature environment (usually below 450°C or above).
Work pressure: Low to medium pressure (usually 0-10Mpa).
Applicable media: Steam, hot water, air, etc.
Product Size
Tolerances of the tubes for low-pressure and medium pressure boilers:
OD tolerance ±0.05mm, ID tolerance ±0.05mm
Tube lengths for low-pressure and medium pressure boilers:
Usually the tubes are supplied in the production length (5 to 6 meters). A precise length may be supplied upon request.
Wall thickness: 0.5mm-5mm | Outer diameter: 4mm-50mm |
Material Steel Type
EN 10216-1 | P195TR1, P235TR1, P265TR1, P195TR2, P235TR2, P265TR2 |
ASTM A 53 | Grade A, Grade B. |
Execution Standards
CHINESE STANDARDS | GB3087 |
EUROPEAN STANDARDS | EN 10216-2, DIN 2448, DIN17175, BS 3059-1, BS 3059-2, BS 3602-1, BS 3604-1, NF A 49-211, NF A 49-213, UNI 4991 |
RUSSIAN STANDARDS | GOST 8732 |
AMERICAN STANDARDS | ASME SA210, ASME SA213 |
Technological Advantages & Quality Control
Technological Advantages
With nearly two decades of expertise, Huagang is recognised as a top precision seamless steel tube manufacturer. We integrate R&D, production, quality management, logistics, and global customer service, enabling customers to secure stable supply and consistent product performance.
Our long-term partnerships with global brands demonstrate our capability to meet rigorous quality expectations.
Adopting cold drawn precision seamless technology to ensure high dimensional accuracy, smooth surface, and uniform wall thickness of steel tubes.
After heat treatment and surface treatment, the mechanical properties and corrosion resistance of the steel tube are further improved.
Adopting cold drawn precision seamless technology to ensure high dimensional accuracy, smooth surface, and uniform wall thickness of steel tubes. | After heat treatment and surface treatment, the mechanical properties and corrosion resistance of the steel tube are further improved. |
Delivery Status:
Designation | Symbol | Description |
Cold drawn / hard | +C (BK) | After the last cold forming no heat treatment. |
Cold drawn / soft | +LC (BKW) | After the last heat treatment, follows the cold drawing there is a light finishing pass. |
Cold drawn and stress relieved annealed | +SR (BKS) | After the final cold drawing process, the tubes are stress-relieved and annealed in a controlled atmosphere. |
Annealed | +A (GBK) | After the last cold drawing process, the tubes are annealed in a controlled atmosphere. |
Normalized | +N (NBK) | After the last cold drawing process, the tubes are normalized in a controlled atmosphere. |
Quality Control
Strict Testing Chemical composition analysis: Ensure that the material composition meets the standard requirements. Mechanical performance testing: Including tensile testing, impact testing, etc., to ensure that the steel tube has sufficient strength and toughness. Non destructive testing: Using ultrasonic, eddy current, or radiographic testing techniques to detect internal defects in steel tubes. Hydraulic test: Each steel tube undergoes a hydraulic test to ensure good sealing and pressure bearing capacity in high-pressure environments. | Testing Standards Compliant with international standards such as GB3087, DIN17175, ASTM A53, ASTM A519, ASTM A106, ASTM A179, ASTM A192, etc. Each batch of products comes with detailed quality inspection reports and certificates of conformity. | Certification Guarantee Obtained ISO/TS16949:2009 quality system certification and obtained the national special equipment pressure pipeline component manufacturing license. |
