冷拔鋼管直線度簡易計算方法

冷拔鋼管直線度或者說彎曲度的計算一般來講有兩種：冷拔鋼管、無縫鋼管或直縫鋼管局部彎曲度：即用長為一米的直尺靠量在鋼管的最大彎曲處，測其弦高（mm），即為局部彎曲度數值，其單位為mm/m，表示方法如2.5mm/印花地坪m。此種方法也適用於管端部彎曲度。
Generally speaking, there are two ways to calculate the straightness or bending degree of cold-drawn steel pipes: cold-drawn steel pipes, seamless steel pipes or straight seam steel pipes. That is, to measure the chord height (m m) at the maximum bending point of steel pipes by measuring the length of one meter, i.e. the local bending degree in M m/m, which is expressed as 2.5m m/m. This method is also applicable to the bending of the end of the pipe. 二、冷拔鋼管全長總彎曲度：用一根細繩，從管的兩端拉緊，測量冷拔鋼管彎曲處最大弦高（mm），然後換算成長度（以米計）的百分數，即為鋼管長度方向的全長彎曲度。
2. Total Bending of Cold Drawn Steel Pipe: Measure the Maximum Chord Height (mm) at the bending point of the steel pipe with a thin rope tensioned from both ends of the pipe, and then convert the percentage of the growth (in meters), that is, the full length bending of the steel pipe in the length direction环氧地坪.

例如：冷拔鋼管長度為10m，測得最大弦高30mm,則該管全長彎曲度應為：
For example, if the length of cold-drawn steel tube is 10m and the maximum chord height is 30mm, the bending degree of the whole length of the tube should be as follows:

0.03÷10m×100%=0.3%
0.03_10m x 100%=0.3%