钢管标准尺寸对照（钢管的尺寸术语你了解多少）

今天小编来跟大家一起探讨一下钢管的专业术语。看完这篇文章，相信需要钢管的朋友就应该知道该如何采购了。

Today, I want to discuss the technical terms of steel pipes with you. After reading this article, I believe that those who need steel pipes should know how to purchase them.

首先是钢管规格，钢管的规格是外径乘壁厚。比如325乘10，它表达的是钢管的外径是325毫米，壁厚是10毫米。每米的理论重量计算公式：（外径-壁厚）x壁厚x0.02466。

The first is the steel pipe specification, which is the outer diameter multiplied by the wall thickness. For example, 325 times 10 represents that the outer diameter of the steel pipe is 325 mm and the wall thickness is 10 mm. Calculation formula of theoretical weight per meter: (outer diameter wall thickness) x wall thickness x 0.02466.

其次是壁厚公差。生产过程中由于实际尺寸难以达到理想要求，因此国家标准中规定了实际厚度允许有一定的偏差。厚的叫正偏差，薄的是负偏差，国家标准公差范围是正负10%。当然凭借我们现在的设备和技术，所生产的钢管儿也没有国标范围那么大。

The second is the wall thickness tolerance. In the production process, the actual size is difficult to meet the ideal requirements, so the national standard stipulates that the actual thickness is allowed to have a certain deviation. The thick one is called positive deviation, the thin one is negative deviation, and the national standard tolerance range is plus or minus 10%. Of course, with our current equipment and technology, the steel pipes produced are not as large as the scope of the national standard.

最后是交货长度。以直缝钢管为例，如果没有特殊要求，我们的产品严格按照国标要求，一般为6米定尺，长度误差在±3cm。

Finally, the delivery length. Take the straight seam steel pipe as an example. If there are no special requirements, our products are strictly in accordance with the requirements of the national standard, which is generally 6 meters long, with a length error of ± 3 cm.

那么定尺和倍尺是什么意思呢？比如说。说定尺3米就按3米交货。倍尺三米的意思，就是6米，9米或者12米交货。

So what do you mean by fixed ruler and multiple ruler? for instance. It was agreed that the delivery would be 3 meters at a fixed length of 3 meters. Three times the length of a foot means delivery of six meters, nine meters or twelve meters.

通过本期的讲解，你是否对钢管的选择和使用有了更加深入的了解呢？欢迎大家评论区补充，记得点赞关注哦。

Do you have a deeper understanding of the selection and use of steel pipes through this explanation? Welcome to the comment area to add, remember to like and follow.