The main difference between seamless steel pipe and LSAW steel pipe is the production process and the use of the scene:

Production process:

Seamless steel pipe: made through the piercing and rolling process, there is no welded seams, the entire body seamless, with good uniformity and strength. Commonly used in high-pressure or need high strength occasions, such as oil, natural gas, boiler piping and so on.

Straight Seam Steel Pipe (ERW Pipe): Steel pipe is made by welding a steel plate or strip along a straight line after it is rolled and shaped. Due to the welded seam, the strength of LSA steel pipe may be slightly weakened in the welded area, but the production efficiency is high and the cost is relatively low. It is commonly used for low-pressure fluid transport, such as water, gas and oil.

Strength and pressure resistance:

Seamless steel pipe is suitable for high-pressure and high-temperature environments due to the absence of welded seams, which makes the overall structure more homogeneous and more resistant to pressure.

The strength of the welded portion of LSAW steel pipe is somewhat lower than that of seamless steel pipe, making it more suitable for lower pressure applications.

Seamless steel pipe has a complex manufacturing process and is relatively expensive to produce.

Application Scenario:

Seamless steel pipe is commonly used for oil and gas transmission, high pressure boilers and pressure vessels.

LSAW steel pipe is mostly used in water and oil pipelines, building structures and other areas that do not require high pressure.

Overall, the choice of seamless steel pipe and straight seam steel pipe should be decided according to the specific needs of use, pressure requirements and cost factors.

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