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螺旋鋼管焊接工藝及包裝方法

日期:2020-02-29

如果螺旋鋼管焊縫間隙過大,附近形成切口的影響,渦流缺熱,焊縫結晶不良,間接共生裂紋或未熔合;如果間隙過小,附近形成的影響增大,過熱焊接形成焊縫灼燒;可能通過捏合焊接,軋后組成凹坑,影響鋼管焊接表面質量的兩個焊接溫度被加熱到一個臨界值,在捏合輥捏合下,共同構成金屬顆粒相互滲透、結晶,末端螺旋鋼管焊縫構成的強力捏合力過小如果,共同構成晶體小,焊縫金屬強度降低,受力后可能發生開裂。

螺旋鋼管焊接工藝及包裝方法

如果揉捏力過大會使熔化的金屬出現擠壓焊縫的情況,不僅降低了焊縫的強度,而且會產生很多小故障,甚至會使焊縫構成不利因素。

螺旋鋼管的包裝方式為運輸或為保護外螺旋鋼管防腐一般為螺旋鋼管包裝,主要為出口螺旋鋼管,螺旋鋼管主要是因為出口是海運,為了便于裝卸一般為包裝,包裝螺旋管分為以下幾種形式:

1、捆包,即捆包公式,如螺旋管219、7捆、螺旋管2737捆。兩端各有一根吊帶,便于吊裝。

2、箱式包裝,是利用角鋼、方管,焊接成箱式通道,將其打開,并將集裝箱的大小,如裝卸貨直接裝卸。

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