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煤礦用瓦斯管抽放管

普通螺旋焊接鋼管
普通螺旋焊接鋼管

   螺旋焊管是將低碳碳素結構鋼或低合金結構鋼鋼帶按一定的螺旋線的角度(叫成型角)卷成管坯,然后將管縫焊接起來制成。我公司現有螺旋焊管生產線820、1020機組兩條,可生產管徑Φ219-Φ1020螺旋焊管。

產品工藝:

螺旋鋼管生產工藝:是以帶鋼卷板為原材料,經常溫擠壓成型,以自動雙絲雙面埋弧焊工藝焊接而成的螺旋縫鋼管。

1、原材料即帶鋼卷,焊絲,焊劑。在投入前都要經過嚴格的理化檢驗。

2、帶鋼頭尾對接,采用單絲或雙絲埋弧焊接,在卷成鋼管后采用自動埋弧焊補焊。

3、成型前,帶鋼經過矯平、剪邊、刨邊,表面清理輸送和予彎邊處理。

4、采用電接點壓力表控制輸送機兩邊壓下油缸的壓力,確保了帶鋼的平穩輸送。

5、采用外控或內控輥式成型。

6、采用焊縫間隙控制裝置來保證焊縫間隙滿足焊接要求,管徑,錯邊量和焊縫間隙都得到嚴格的控制。

7、內焊和外焊均采用美國林肯電焊機進行單絲或雙絲埋弧焊接,從而獲得穩定的焊接規范。

8、焊完的焊縫均經過超聲波傷儀檢查,保證了螺旋焊縫的無損檢測覆蓋率。若有缺陷,噴涂標記,生產工人依此隨時調整工藝參數,及時消除缺陷。

9、采用空氣等離子切割機將鋼管切成單根。

10、切成單根鋼管后,每批鋼管頭三根要進行嚴格的首檢制度,檢查焊縫的力學性能,化學成份,鋼管表面質量以及經過無損探傷檢驗,確保制管工藝合格后,才能正式投入生產。

11、焊縫上有連續聲波探傷標記的部位,經過手動超聲波復查,如確有缺陷,經過修補后,再次經過無損檢驗,直到確認缺陷已經消除。

12、帶鋼對焊焊縫及與螺旋焊縫相交的丁型接頭的所在管,全部經過無損檢查。

13、鋼管經過靜水壓試驗,壓力采用徑向密封。試驗壓力和時間都由鋼管水壓機嚴格控制。

14、管端機械加工,使端面垂直度,坡口角和鈍邊得到準確控制。



產品特點:

焊管生產工藝簡單,生產效率高,成本低,發展較快。螺旋焊管的強度高,能用較窄的坯料生產管徑較大的焊管,還可以用同樣寬度的坯料生產管徑不同的焊管。

產品用途:

螺旋焊管在國內主要應用于自來水工程、石化工業、化學工業、電力工業、農業灌溉、城市建設。作液體輸送用:給水、排水。作氣體輸送用:煤氣、蒸氣、液化石油氣。作結構用:作打樁管、作橋梁;碼頭、道路、建筑結構用管等。

湖北快三
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