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彎頭與彎管的不同之處

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2020-08-26 17:35

　　彎頭與彎管最基本的不同之處就是彎頭相對彎管來(lái)說(shuō)比較短。R=1倍到2倍的是彎頭，再大的倍數就叫彎管。在制作工藝上冷彎管可以用現成的直管用彎管機彎制，一次性完工還不用二次防腐。但彎頭要廠(chǎng)家定做，要做防腐，訂貨周期長(cháng)。彎頭價(jià)格比彎管要高但是性?xún)r(jià)比卻比彎管要高出很多，沒(méi)有做防腐處理的彎管易損壞是公所周知的，但其因為價(jià)格便宜在一些要求不是很高的工程使用非常多。

　　彎頭要廠(chǎng)家定做，要防腐，訂貨周期長(cháng)。冷彎管可以用現成的直管用彎管機彎制。一次性完工還不用二次防腐。冷彎管施工工藝有個(gè)石油標準，西氣東輸有企業(yè)標準。但開(kāi)闊地段用彎頭彎管都行，僅考慮造價(jià)，彎頭需熱煨，彎管冷彎就可以，當然是彎頭造價(jià)高。有時(shí)狹窄地段處必須用彎頭，如石方段管溝，因為彎頭曲率半徑小，一般為6D，而彎管為40D。

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