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專業生產銷售大口徑厚壁國標螺旋鋼管,廠內加工防腐/保溫/涂塑

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首頁 > 鋼管百科 > 螺旋焊管尺寸偏差

螺旋焊管尺寸偏差

日期:2020-02-29

螺旋焊管的尺寸偏差主要表現在直線度、圓度、壁厚不均等方面。

螺旋焊管尺寸偏差

在大多數情況下,使用的螺旋鋼管直線度公差較大,但制造標準對螺旋管直線度的要求,如果超過預定值,將構成退貨的理由,因此,螺旋管廠仍應予以注明。

圓度公差會影響螺旋鋼管的使用,主要在組焊頭的反面。圓度公差過大導致焊接接頭的錯邊,不僅會降低焊接接頭的承壓能力,還會引起應力集中。當場地分組時,圓度有些管道可以校正。外徑偏差對螺旋鋼管使用圓度公差的影響比較大。

壁厚不均勻一般容易被忽略,許多螺旋鋼管標準也沒有明確規定。如果壁厚不均勻,不僅會造成接頭設置錯邊,還會對二次變形加工(如鋼管制造管)產生不利影響。

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