Large diameter welded pipe(such as stainless steel welded pipe) is a pipe product used to transport liquids, gases, solids and other substances, usually made of steel. These pipes are commonly used in industry, construction, petrochemicals, water supply, heating and other fields. The following is some relevant information about large diameter welded pipes:
1. Large diameter welded pipe size
The size of large diameter welded pipes usually refers to steel welded pipes with larger diameters. Generally speaking, the size of large diameter welded pipes will vary according to production standards and requirements. The size of large diameter welded pipes can include diameters ranging from 6 inches to 60 inches, wall thickness usually varies from 5mm to 30mm, and the length can be customized according to customer needs, usually 6 meters, 9 meters or 12 meters, etc. This is just an example, actual sizes will vary depending on production standards, material requirements and usage. The specific size you need can be determined based on your project and needs.
2. Material of large diameter welded pipe
Large-diameter welded pipes can usually be made of a variety of materials. Common materials include:
(1) Carbon steel: suitable for general industrial purposes, with good mechanical properties and weldability.
(2) Alloy steel: It has the characteristics of high temperature resistance and corrosion resistance, and is suitable for high temperature and high pressure environments or special chemical industry needs.
(3) Stainless steel: It has corrosion resistance and is suitable for occasions with high requirements on material purity and surface.
(4) Other special materials: such as titanium alloy, nickel-based alloy, etc., suitable for special process requirements or special medium transportation.
Choosing the appropriate material depends on factors such as the specific use of the large-diameter welded pipe, working environment, medium characteristics, and budget.
3. Manufacturing process of large diameter welded pipe
Different manufacturing processes are suitable for different pipe sizes, materials and usage requirements. Choosing the appropriate manufacturing process ensures the quality, performance and serviceability of welded pipe. Large diameter welded pipes usually use the following manufacturing processes:
(1) Straight seam welded pipe(LSAW tube): This process is made by rolling the steel plate into a tube shape, and then using a welding process to weld the edge of the tube plate with a long seam. This process is suitable for the production of large-diameter, thick-walled welded pipes, which are often used in pipeline systems for transporting liquids and gases.
(2) Spiral welded pipe(SSAW steel pipe): In this process, the steel plate is rolled into a tube shape by a plate rolling machine, and then welded through a continuous spiral welding process. Spiral welded pipes are suitable for pipes with larger diameters and thicker walls, and are mainly used to transport oil, gas or other media.
(3) Drawing method: Large-diameter thin-walled welded pipes are made by drawing steel billets. This process is suitable for occasions that require high surface quality and dimensional accuracy of pipes.
(4) Cold drawing method: After heating the steel billet to an appropriate temperature, the welded pipe is made by cold drawing process. This process is suitable for producing welded pipes with thin wall thickness and high dimensional accuracy requirements.
4. Standards for large diameter welded pipes
The production and quality of large-diameter welded pipes generally need to comply with the following international standards and industry standards:
(1) ASTM standards: The American Society for Testing and Materials has formulated a number of standards for welded pipes, such as ASTM A53/A53M, ASTM A252, ASTM A139, etc., covering the requirements for welded pipes of different materials, sizes and uses.
(2) API standards: The American Petroleum Institute has issued a series of standards for the oil and gas industry, including standards for welding and seamless pipes, such as API 5L.
(3) DIN standards: The German Standardization Organization has issued a number of standards for steel pipelines, such as DIN 2458, DIN 1626, etc.
(4) GB standards: China National Standardization Administration Committee has issued a series of national standards for welded pipes, such as GB/T 3091, GB/T 9711, etc.
These standards cover the material, size, manufacturing process, testing requirements and other aspects of welded pipes, ensuring the quality and safety of welded pipe products. In actual procurement and use, standard products that meet the requirements should be selected based on specific project needs and relevant regulations and standards of the country/region.
1. Large diameter welded pipe size
The size of large diameter welded pipes usually refers to steel welded pipes with larger diameters. Generally speaking, the size of large diameter welded pipes will vary according to production standards and requirements. The size of large diameter welded pipes can include diameters ranging from 6 inches to 60 inches, wall thickness usually varies from 5mm to 30mm, and the length can be customized according to customer needs, usually 6 meters, 9 meters or 12 meters, etc. This is just an example, actual sizes will vary depending on production standards, material requirements and usage. The specific size you need can be determined based on your project and needs.
2. Material of large diameter welded pipe
Large-diameter welded pipes can usually be made of a variety of materials. Common materials include:
(1) Carbon steel: suitable for general industrial purposes, with good mechanical properties and weldability.
(2) Alloy steel: It has the characteristics of high temperature resistance and corrosion resistance, and is suitable for high temperature and high pressure environments or special chemical industry needs.
(3) Stainless steel: It has corrosion resistance and is suitable for occasions with high requirements on material purity and surface.
(4) Other special materials: such as titanium alloy, nickel-based alloy, etc., suitable for special process requirements or special medium transportation.
Choosing the appropriate material depends on factors such as the specific use of the large-diameter welded pipe, working environment, medium characteristics, and budget.
3. Manufacturing process of large diameter welded pipe
Different manufacturing processes are suitable for different pipe sizes, materials and usage requirements. Choosing the appropriate manufacturing process ensures the quality, performance and serviceability of welded pipe. Large diameter welded pipes usually use the following manufacturing processes:
(1) Straight seam welded pipe(LSAW tube): This process is made by rolling the steel plate into a tube shape, and then using a welding process to weld the edge of the tube plate with a long seam. This process is suitable for the production of large-diameter, thick-walled welded pipes, which are often used in pipeline systems for transporting liquids and gases.
(2) Spiral welded pipe(SSAW steel pipe): In this process, the steel plate is rolled into a tube shape by a plate rolling machine, and then welded through a continuous spiral welding process. Spiral welded pipes are suitable for pipes with larger diameters and thicker walls, and are mainly used to transport oil, gas or other media.
(3) Drawing method: Large-diameter thin-walled welded pipes are made by drawing steel billets. This process is suitable for occasions that require high surface quality and dimensional accuracy of pipes.
(4) Cold drawing method: After heating the steel billet to an appropriate temperature, the welded pipe is made by cold drawing process. This process is suitable for producing welded pipes with thin wall thickness and high dimensional accuracy requirements.
4. Standards for large diameter welded pipes
The production and quality of large-diameter welded pipes generally need to comply with the following international standards and industry standards:
(1) ASTM standards: The American Society for Testing and Materials has formulated a number of standards for welded pipes, such as ASTM A53/A53M, ASTM A252, ASTM A139, etc., covering the requirements for welded pipes of different materials, sizes and uses.
(2) API standards: The American Petroleum Institute has issued a series of standards for the oil and gas industry, including standards for welding and seamless pipes, such as API 5L.
(3) DIN standards: The German Standardization Organization has issued a number of standards for steel pipelines, such as DIN 2458, DIN 1626, etc.
(4) GB standards: China National Standardization Administration Committee has issued a series of national standards for welded pipes, such as GB/T 3091, GB/T 9711, etc.
These standards cover the material, size, manufacturing process, testing requirements and other aspects of welded pipes, ensuring the quality and safety of welded pipe products. In actual procurement and use, standard products that meet the requirements should be selected based on specific project needs and relevant regulations and standards of the country/region.
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