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合肥鋼管租賃解讀彎曲度和尺寸超差
彎曲度
Bending degree
鋼管在長度方向上呈曲線狀,用數字表示出其曲線度即叫彎曲度。標準中規定的彎曲度一般分為如下兩種:
Steel pipe length direction in a curved line, a digital expressed its curve degree that is called bending degree. The degree of curvature of standards are generally classified into the following two:
A、局部彎曲度:用一米長直尺靠量在鋼管的大彎曲處,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/m。合肥鋼管出租(租賃)此種方法也適用于管端部彎曲度。
A and local flexibility: with one metre long straight ruler in the amount of steel pipe on the maximum bending place, measuring the string high (mm), namely for local curve for numerical, its unit for mm/m, says methods such as 2.5 mm/m. This method is also applicable to the pipe bending degree.
B、全長總彎曲度:用一根細繩,從管的兩端拉緊,測量鋼管彎曲處大弦高(mm),然后換算成長度(以米計)的百分數,合肥鋼管出租(租賃)即為鋼管長度方向的全長彎曲度。
例如:鋼管長度為8m,測得大弦高30mm,則該管全長彎曲度應為:
For example: steel tube length is 8 m, the biggest string 30 mm high, the length of pipe bending degree should be:
0.03÷8m×=0.375%
0.03 ÷ 8 m x = 0.375%
尺寸超差
Size of tolerance
尺寸超差或叫尺寸超出標準的允許偏差。此處的"尺寸"主要指鋼管的外徑和壁厚。通常有人把尺寸超差習慣叫"公差出格",這種把偏差和公差等同起來的叫法是不嚴密的,應叫"偏差出格"。此處的偏差可能是"正"的,也可能是"負"的,很少在同一批鋼管中出現"正、負"偏差均出格的現象。