I. The core value and multi-dimensional analysis of boiler seamless pipe
Boiler seamless pipe is an indispensable key material in modern industry, which is widely used in electric power, chemical industry, oil and gas and other fields.
In this paper, we will comprehensively analyse the definition, classification, material properties, manufacturing process, specifications, testing methods, application areas and market development trend of boiler seamless pipe.
By comparing and analysing the international and domestic standards, the importance of seamless steel tubes in modern industry and the opportunities and challenges for future development will be discussed in depth.
II. Definition and Basic Characteristics
Seamless steel pipe for boiler is a high quality seamless steel pipe designed for boilers and related pressure vessels. The manufacturing process of this tube ensures that there are no welded seams inside, thus improving the overall strength and reliability.
Its smooth surface reduces the resistance to media flow, and its good heat and corrosion resistance enables it to maintain stable performance under severe operating conditions.
III.Classification
(1) Classified according to material:
It can be divided into carbon steel seamless steel pipe, alloy steel seamless steel pipe and stainless steel seamless steel pipe. Carbon steel seamless steel pipe is suitable for low and medium pressure boilers, while alloy steel and stainless steel seamless steel pipe is used in high pressure or high temperature environment with higher strength and corrosion resistance.
(2) Classification by use:
It can be divided into tubes for power station boilers, tubes for chemical boilers, tubes for heat exchangers and so on. Steel tubes for different applications differ in specifications and performance to meet the needs of specific working conditions.
(3) Classification according to pressure level:
It can be divided into low pressure boiler tube, medium pressure boiler tube and high pressure boiler tube. The higher the pressure rating, the higher the requirements for the strength and high temperature resistance of the steel pipe.
IV. Common types of introduction
(1) Carbon steel seamless steel pipe:
This type of steel pipe is based on carbon steel and is characterised by low cost and good processing performance. It is mainly used in low and medium pressure boilers and is suitable for environments where the working temperature does not exceed 450℃.
(2) Alloy steel seamless steel pipe:
Alloy steel seamless steel pipe is made by adding alloy elements (such as chromium, molybdenum, vanadium, etc.) to improve its strength and high temperature resistance. It is widely used in high-pressure boilers and high-temperature equipment, capable of withstanding higher working pressures and temperatures.
(3) Stainless steel seamless steel pipe:
Seamless stainless steel pipe has excellent corrosion resistance and high temperature resistance, which is suitable for chemical industry, food processing and marine engineering and other fields. It can resist the erosion of a variety of chemical media, while maintaining good mechanical properties.
(4) High pressure boiler tube:
High-pressure boiler tube is a seamless steel tube designed for high-pressure boilers with high strength, high toughness and good fatigue resistance. It is usually made of alloy steel and is capable of withstanding extremely high working pressures and temperatures.
V. Seamless steel pipe for boiler specification parameters in detail
| Item | Content | Explanation |
|---|---|---|
| Common Specifications | Outer Diameter Range: 6 mm - 1240 mm | Includes low and medium pressure boiler pipes (10 mm - 426 mm) and high-pressure boiler pipes (6 mm - 1240 mm) |
| Wall Thickness Range: 1 mm - 200 mm | Low and medium pressure boiler pipes: 1.5 mm - 26 mm; High-pressure boiler pipes can reach up to 200 mm | |
| Length Range: Typically 6 meters, 12 meters, or customized | Length can be customized according to user requirements to meet different installation needs | |
| Parameter Selection Criteria | Pressure Level | Low and medium pressure boiler pipes for working pressures ≤3.8 MPa; High-pressure boiler pipes for ≥5.9 MPa |
| Working Temperature | 20G material for wall temperatures ≤450°C; 12Cr1MoVG material for wall temperatures ≤555°C | |
| Purpose | Low and medium pressure boiler pipes for superheated steam pipes, boiling water pipes, etc.; High-pressure boiler pipes for high-pressure steam pipes, heat-exposed pipes | |
| International Standard Specifications | GB/T 3087-2022 | Low and medium pressure boiler pipes: Outer diameter 10 mm - 426 mm, wall thickness 1.5 mm - 26 mm |
| GB/T 5310-2023 | High-pressure boiler pipes: Outer diameter 6 mm - 1240 mm, wall thickness 1 mm - 200 mm | |
| ASTM A192/A192M | Outer diameter range: 1/2 inch - 7 inches (12.7 mm - 177.8 mm), wall thickness 0.085 inch - 1.000 inch (2.2 mm - 25.4 mm) | |
| EN 10216-2 | Covers a wide range of alloy and carbon steel materials, suitable for high-pressure and high-temperature environments |
VI. Seamless steel pipe for boiler international parameters and related standards:
(1) American Standard (ASTM A192/A192M)
Scope of application: Suitable for high pressure boilers, ultra-high pressure boilers, heaters and heat exchangers and other pressure vessels.
Outside diameter range: 1/2 inch to 7 inches (12.7 mm to 177.8 mm).
Wall thickness range: 0.085 inches to 1.000 inches (2.2 mm to 25.4 mm).
Chemical composition: Carbon, manganese, phosphorus, sulphur and silicon are required to meet standard requirements.
Mechanical properties: flattening test, flaring test, hardness test and hydraulic test are required.
Main advantages: high strength, high temperature resistance, corrosion resistance, suitable for high pressure and high temperature environment.
(2) European standard (EN 10216-2)
Scope of application: Suitable for pressure vessels such as high-pressure and ultra-high-pressure boilers, chemical and petrochemical equipment.
Material grade: including P235GH, P265GH, 16Mo3, 13CrMo4-5, 10CrMo9-10, etc.
Chemical composition: need to comply with international standards, the specific composition depends on the material grade.
Mechanical properties: High strength, durability at high temperature and pressure are required.
Main advantages: suitable for high temperature and high pressure environment, with good mechanical properties.
(3) International Standards (ISO)
ISO 9000/9001: deals with quality management systems to ensure product quality and consistency.
ISO 1127: specifies the dimensions, tolerances and quality per unit length of stainless steel tubes.
(4) Other international standards
EN 10204: Types of inspection documents for metal products.
NACE MR0103/MR0175: Sulfide stress cracking resistant materials for the oil, petrochemical and gas industries.
(5) Common materials and properties
Carbon steel: e.g. ASTM A192, suitable for high pressure boilers, with high strength and high temperature resistance.
Alloy steel: such as ASTM A213 (T5, T9, T11, etc.), suitable for high temperature and high pressure environment.
Stainless steel: such as TP304, TP316, suitable for corrosive environments and high temperature applications.
