從螺旋鋼管的表面上看螺旋管的制造工藝是不是精致，一般來說好的螺旋鋼管公司在生產方面會認真仔細，不會有一些摩擦瑕疵等出現。
From the surface of spiral steel pipe, whether the manufacturing process of spiral steel pipe is exquisite. Generally speaking, good spiral steel pipe companies will be careful in production, and there will be no friction defects.
另一方面要敲打金屬鋼管，如果聲音很脆而且回音不是很污濁的話說名螺旋鋼管才是是選用的新的，而不是廢舊螺旋管回收利用的。下面螺旋管廠家簡單為您介紹一下螺旋鋼管的檢測方法。螺旋鋼管的橫截面呈橢圓形，原因是廠家為了節約材料，成品輥前二道的壓下量偏大，這種螺紋鋼的強度大大地下降，而且也不符合螺紋鋼外形尺寸的標準。
On the other hand, it is necessary to knock the metal steel pipe. If the sound is very crisp and the echo is not very dirty, the spiral steel pipe is the new one, not the waste spiral pipe. The following spiral pipe manufacturer briefly introduces the detection method of spiral steel pipe. The cross section of the spiral steel pipe is oval. The reason is that in order to save materials, the reduction of the first two passes of the finished roll is too large, the strength of this kind of rebar is greatly reduced, and it does not meet the standard of the overall dimension of rebar.

優質鋼材的成分均勻，冷剪機的噸位高，切頭端面平滑而整齊，而材由于材質差，切頭端面常常會有掉肉的現象，即凹凸不平，并且無金屬光澤。而且由于材廠家產品切頭少，頭尾會出現大耳子。
The composition of high-quality steel is uniform, the tonnage of the cold shear is high, and the end face of the cutting head is smooth and neat. Due to the poor material, the end face of the cutting head often falls off, that is, it is uneven and has no metallic luster. Moreover, due to less head cutting of products from wood manufacturers, big ears will appear at the head and tail.
現在會判段優質螺旋鋼管的質量了吧。從表面上判斷，也就是在外觀檢驗。焊接接頭的外觀檢驗是一種手續簡便而又應用廣泛的檢驗方法，是成品檢驗的一個重要內容，主要是發現焊縫表面的缺陷和尺寸上的偏差。一般通過肉眼觀察，借助標準樣板、量規和放大鏡等工具進行檢驗。若焊縫表面出現缺陷，焊縫內部便有存在缺陷的可能。
Now I will judge the quality of high-quality spiral steel pipe. Judging from the surface, that is, in the appearance inspection. The appearance inspection of welded joints is a simple and widely used inspection method. It is an important content of finished product inspection. It is mainly to find the defects on the weld surface and dimensional deviation. Generally, inspection is carried out through visual observation with the help of standard template, gauge, magnifying glass and other tools. If there are defects on the weld surface, there may be defects inside the weld.