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1.外觀上，無縫鋼管和焊接鋼管區別在焊管內壁有焊筋，而無縫的沒有。

1. in appearance, the seamless steel pipe and welded pipe are distinguished from the welded pipe on the inner wall of the welded pipe, but the welded pipe is seamless.

2.無縫管壓力更高，焊管一般在10個左右MPa，現在焊管有做無縫化處理的。

2. seamless tube pressure is higher, welding pipe is generally in about 10 MPa, now welded pipe has seamless processing.

3.無縫鋼管是在軋制中一次成型的。焊接鋼管需要卷制后焊接而成，一般有螺旋焊和直焊。性能無縫管要好一些，當然價也高一些。

3. seamless steel pipe is formed in a rolling process. Welded steel pipes need to be rolled and welded, usually with spiral and straight welding. The performance seamless tube is better, and of course the price is higher.

鋼管是一種中空的長條鋼材，大量用作輸送流體的管道，如石油、天燃氣、水、煤氣、蒸氣等，另外，在搞彎、抗扭強度相同時，重量較輕，所以也廣泛用于制造機械零件和工程結構。也常用作生產各種常規武器、槍管、炮彈等。

Steel pipe is a hollow strip steel, which is widely used as a conduit for transporting fluids, such as petroleum, natural gas, water, gas and steam. In addition, it is lighter in bending and torsional strength, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also used to produce all kinds of conventional weapons, guns, shells and so on.

鋼管分無縫鋼管和焊接鋼管（有縫管）兩大類。按斷面形狀又可分為圓管和異形管，廣泛應用的是圓形鋼管，但也有一些方形、矩形、半圓形、六角形、等邊三角形、八角形等異形鋼管。

The steel pipe seamless steel pipe and welded steel pipe (seamed pipe) two categories. According to the shape of the section, it can be divided into circular pipes and special-shaped pipes. The circular steel tubes are widely used, but there are also some square, rectangular, semi-circular, hexagonal, equilateral triangles, octagonal and other special-shaped steel tubes.

以上就是小編為您講解的有關知識，我們擁有嚴謹的工作態度，熟練的工作技能，將確保任務準確、高效的完成。

The above is the knowledge that Xiao Bian tells you. We have strict working attitude and skilled working skills. We will ensure that tasks are done accurately and efficiently.