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螺旋焊接鋼管的堆碼原則及要

螺旋焊接鋼管焊接區(qū)的常見缺

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螺旋鋼管的特點(diǎn):螺旋鋼管生產(chǎn)工藝簡單,生產(chǎn),成本低,發(fā)展較快.螺旋焊管的強(qiáng)度一般比直縫焊接鋼管高,能用較窄的坯料生產(chǎn)管徑較大的焊接鋼管,還可以用同樣寬度的坯料生產(chǎn)管徑不同的焊管.但是與相同長度的直縫管相比,焊縫長度增加30~100%,而且生產(chǎn)速度較低.因此,較小口徑的焊管大都采用直縫焊,大口徑焊接鋼管則大多采用螺旋焊螺旋鋼管及其標(biāo)準(zhǔn)分類:承壓流體輸送用螺旋縫埋弧焊鋼管(SY5036-83)主要用于輸送石油,氣的管線;承壓流體輸送用螺旋縫高頻焊鋼管(SY5038-83),用高頻搭接焊法焊接的,用于承壓流體輸送的螺旋縫高頻焊鋼管.鋼管承壓能6力強(qiáng),塑性好,便于焊接和加工成型;一般低壓流體輸送用螺旋縫埋弧焊鋼管(SY5037-83),采用雙面自動埋弧焊或單面焊法制成的用于水,煤氣,空氣和蒸汽等一般低壓流體輸送用埋弧焊鋼管現(xiàn)在螺旋鋼管的常用標(biāo)準(zhǔn)一般分為:SY/T5037-2000(部標(biāo),也叫普通流體輸送管道用螺旋縫埋弧焊鋼管),GB/T9711.1-1997(國標(biāo),也叫石油氣工業(yè)輸送鋼管交貨技術(shù)條件部分:鋼管(到目前要求嚴(yán)格的有GB/T9711.2 B級鋼管),API-5L(美國石油協(xié)會,也叫管線鋼管;其中分為PSL1和PSL2兩個級別),SY/T5040-92(樁用螺旋縫埋弧焊接鋼管)


雙面埋弧焊螺旋鋼管	埋弧焊螺旋鋼管	大口徑螺旋鋼管

石油管道用螺旋鋼管	一般螺旋鋼管	氣工程用螺旋鋼管

螺旋鋼管生產(chǎn)工藝:是以帶鋼卷板為原材料,經(jīng)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(jīng)過嚴(yán)格的理化檢驗(yàn).
(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(bǔ)焊.
(3)成型前,帶鋼經(jīng)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(diǎn)壓力表控制輸送機(jī)兩邊壓下油缸的壓力,了帶鋼的平穩(wěn)輸送.
(5)采用外控或內(nèi)控輥式成型.
(6)采用焊縫間隙控制裝置來焊縫間隙滿足焊接要求,管徑,錯邊量和焊縫間隙都嚴(yán)格的控制.
(7)內(nèi)焊和外焊均采用美國林肯電焊機(jī)進(jìn)行單絲或雙絲埋弧焊接,從而獲得穩(wěn)定的焊接規(guī)范.
(8)焊完的焊縫均經(jīng)過在線連續(xù)超聲波自動傷儀檢查,了100％的螺旋焊縫的無損檢測覆蓋率.若有缺陷,自動報警并噴涂標(biāo)記,生產(chǎn)工人依此隨時調(diào)整工藝參數(shù),及時缺陷.
(9)采用空氣等離子切割機(jī)將鋼管切成單根.
(10)切成單根鋼管后,每批鋼管頭三根要進(jìn)行嚴(yán)格的首檢制度,檢查焊縫的力學(xué)性能,化學(xué)成份,溶合狀況,鋼管表面質(zhì)量以及經(jīng)過無損探傷檢驗(yàn),制管工藝合格后,才能正式投入生產(chǎn).
(11)焊縫上有連續(xù)聲波探傷標(biāo)記的部位,經(jīng)過手動超聲波和X射線復(fù)查,如確有缺陷,經(jīng)過修補(bǔ)后,再次經(jīng)過無損檢驗(yàn),直到確認(rèn)缺陷已經(jīng).
(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(jīng)過X射線電視或拍片檢查.
(13)每根鋼管經(jīng)過靜水壓試驗(yàn),壓力采用徑向密封.試驗(yàn)壓力和時間都由鋼管水壓微機(jī)檢測裝置嚴(yán)格控制.試驗(yàn)參數(shù)自動打印記錄.
(14)管端機(jī)械加工,使端面垂直度,坡口角和鈍邊準(zhǔn)確控制.

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螺旋焊接鋼管的堆碼原則及要求

螺旋焊接鋼管焊接區(qū)的常見缺陷

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