Welded Seamless Pipes/Tubes
Welded Pipes/Tubes
Welded pipes/tubes are fabricated by rolling a steel plate or strip into a tubular shape and then joining the edges through welding. This manufacturing method allows for relatively easy production and customization, making it cost - effective for a wide range of applications.
Manufacturing Process
The production of welded pipes typically begins with the selection of appropriate steel materials. The steel plate or strip is first cut to the desired width and length. It is then formed into a circular or other required cross - sectional shape using bending or rolling machinery. After shaping, the edges are welded together using various welding techniques. Common welding methods include Electric Resistance Welding (ERW), Submerged Arc Welding (SAW), and Tungsten Inert Gas (TIG) welding. Each method has its own advantages; for example, ERW is highly efficient for high - volume production, SAW can produce strong welds for large - diameter pipes, and TIG welding offers precise and high - quality welds, especially for thinner - walled pipes.
Characteristics
Welded pipes have a visible weld seam, which can sometimes be a point of weakness under certain conditions. However, modern welding techniques and quality control measures ensure that the welds are strong and reliable in most applications. They are available in a wide range of diameters and wall thicknesses, providing flexibility in design. Welded pipes generally have a lower cost compared to seamless pipes, making them an attractive option for projects with budget constraints.
|
product name |
Spiral steel pipe |
|
Usage |
Used for low-pressure liquid transportation, such as water, gas, and oil; Buildings and pipelines |
|
Standard |
API 5L,ASTM A252,EN10217-1,2,5,EN10219-1,BS,JIS,IS |
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Outside diameter |
219.1 mm -3048 mm (8 "-120") |
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Surface |
5~30mm |
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Steel grade |
API 5L: GR A, GR B, X42, X46, X56, X60, X65, X70 ASTM A252 GR 1, GR 2, GR 3 BS 4360: Level 43, Level 50 EN: S275JR, S275J0H, |
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Rolling mill test certificate |
EN 10204/3.1B |
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Surface |
According to customer requirements for melt bonded epoxy coatings, coal tar epoxy coatings, 3PE, Vanish coatings, asphalt |
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Test |
Chemical composition analysis, mechanical properties (tensile strength, yield strength, elongation), metallographic testing, |
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