Tubes For High And Ultra-high Pressure Boilers
The tubes of high-pressure and ultra high pressure boilers are designed specifically for high-temperature and high-pressure environments, and are widely used in the power, energy, and chemical industries. Its manufacturing method is the same as seamless steel tubes, but there are strict requirements for the steel grades used in the manufacturing of steel tubes. High pressure seamless steel tubes are often subjected to high temperature and high pressure conditions during use. High pressure seamless steel tubes are mainly used to manufacture superheater pipes, reheater pipes, guide pipes, main steam pipes, etc. that pass through high and ultra-high pressure pipelines. The following is a detailed introduction to this type of product:
Applicable Environment
- Working temperature: High temperature environment (up to 600°C or above).
- Work pressure: High pressure to ultra-high pressure (usually above 10Mpa, up to 30Mpa or higher).
- Applicable media: Steam, high-temperature gases, etc.
Product Size
Tolerances of the tubes for high and ultra-high pressure boilers:
OD tolerance ±0.05mm, ID tolerance ±0.05mm
Tube lengths for high and ultra-high pressure boilers:
Usually the tubes are supplied in the production length (5 to 6 meters). A precise length may be supplied upon request.
Material Steel Type
|
EN 10216-2 |
P195GH, P235GH, P265GH, 16Mo3, 14MoV6-3, 7CrWVMoNb9-6, 7CrMoVTiB10-10, 10CrMo5-5, 13CrMo4-5, 10CrMo9-10, 25CrMo4, X11CrMo5+I, X11CrMo5+NT1 etc. |
|
ASTM A 106 |
Grade A, Grade B, Grade C |
|
ASTM A 209 |
Grade T1, Grade T1a, Grade T1b |
|
ASTM A 210 |
Grade A-1, Grade C |
|
ASTM A 556 |
Grade A2, Grade B2, Grade C2 |
|
ASTM A 335 |
Grade T/P11, Grade T/P12, Grade T/P22, Grade T/P24 |
|
ASTM A 213 |
Grade T/P11, Grade T/P12, Grade T/P22, Grade T/P24 |
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
Adopting cold drawn precision seamless technology to ensure high dimensional accuracy, smooth surface, and uniform wall thickness of steel pipes.
After heat treatment and surface treatment, the mechanical properties and corrosion resistance of the steel pipe are further improved.
|
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 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 pipe has sufficient strength and toughness.
Non destructive testing: Using ultrasonic, eddy current, or radiographic testing techniques to detect internal defects in steel pipes.
Hydraulic test: Each steel pipe 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, EN10216-2, ASTM A53, ASTM A106, ASTM A179, ASTM A192, BS3059, BS3602, 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.
Our Certificates
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