无缝钢管与焊接钢管: 你真正需要哪个?

无缝钢管与焊接钢管: 你真正需要哪个?

“How do I choose between seamless and welded pipe?” is one of the most common questions in steel purchasing. The answer is pressure, temperature, wall tolerance and budget — not a single brand preference.

焊接式 (ERW) 管道

Electric-resistance-welded pipe is made from coil rolled into a tube and welded longitudinally. It is cheaper, straighter, more dimensionally consistent in light walls, and available in long random lengths. It is the default for structural tubing, 击剑, 脚手架, greenhouses and low-pressure conveyance. 看看我们的 Q235B焊管 和 galvanized welded pipe.

Seamless Pipe

Seamless pipe is pierced from a solid billet. It has no weld seam, which makes it the right choice for high pressure, high temperature, hydraulic and oil-and-gas service. It costs more and is usually ordered in shorter random lengths. 看看我们的 20# 无缝管 和 304 seamless tube.

Rule of Thumb

If the application is structural or low-pressure conveyance, welded saves money. If the pipe carries fluid under high pressure or at elevated temperature, specify seamless and ask for mill test certificates.

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