螺旋冷拔鋼管和冷拔鋼管有什么不同呢？

冷拔鋼管是指用鋼帶或鋼板彎曲變形為圓形、方形等形狀后再焊接成的、表面有接縫的鋼管。 冷拔鋼管采用的坯料是鋼板或帶鋼。20世紀(jì)30年代以來(lái)，隨著優(yōu)質(zhì)帶鋼連軋生產(chǎn)的迅速發(fā)展以及焊接和檢驗(yàn)技術(shù)的進(jìn)步，焊縫質(zhì)量不斷提高，冷拔鋼管的品種規(guī)格日益增多，并在越來(lái)越多的領(lǐng)域代替了無(wú)縫鋼管。冷拔鋼管比無(wú)縫鋼管成本低、生產(chǎn)效率高。

Cold drawn pipe refers to the bending deformation of circular and square shape after welded, surface jointed steel pipe or steel plate. The blank of cold drawn steel tube is used in steel plate or strip. 20 30 century since the 1990s, with the rapid development of high-quality strip rolling production and progress of welding and testing technology, and constantly improve the weld quality, varieties and specifications of cold drawn steel tube increasing, and instead of the seamless steel pipe in more and more fields. Than the cold drawn steel pipe seamless steel pipe with low cost and high production efficiency. 鋼管分無(wú)縫、焊管。焊管分直縫冷拔鋼管、螺旋鋼管。冷拔無(wú)縫鋼管分ERW（高頻電阻焊）、LSAW（直縫埋弧焊）。螺旋管焊接工藝也是埋弧焊（簡(jiǎn)稱SSAW）與LSAW 的區(qū)別就是焊縫形式，與ERW的區(qū)別是焊接工藝的區(qū)別，埋弧焊（SAW）是要添加介質(zhì)的（焊絲、焊劑），ERW不需要，ERW是通過(guò)中頻加熱熔融的。鋼管按生產(chǎn)方法可分為兩大類(lèi)：無(wú)縫鋼管和冷拔鋼管。冷拔無(wú)縫鋼管按生產(chǎn)方法可分為：熱軋冷拔無(wú)縫鋼管、冷拔管、精密鋼管、熱擴(kuò)管、冷旋壓管和擠壓管等。無(wú)縫鋼管用優(yōu)質(zhì)碳素鋼或合金鋼制成，有熱軋、冷軋（拔）之分。

The steel pipe, seamless pipe. Branch pipe straight seam steel pipe, spiral steel pipe. Cold drawn seamless steel tube ERW (HFRW), LSAW (SAWL). Spiral pipe welding technology of submerged arc welding (SSAW) is the difference between LSAW and ERW is the form of welding, the distinction is the welding process, submerged arc welding (SAW) is added to the medium (wire, flux), ERW does not require ERW, is through the intermediate frequency melting. Steel pipe according to the production method can be divided into two categories: seamless steel tubes and steel pipes. Seamless steel pipe according to the production method can be divided into: hot-rolled seamless pipe, cold drawing tube, precision steel tube, thermal expansion pipe, tube and pipe extrusion cold spinning. Seamless steel pipe made of high quality carbon steel or alloy steel, hot-rolled, cold-rolled (drawn) branch.

冷拔無(wú)縫鋼管生產(chǎn)工藝簡(jiǎn)單，生產(chǎn)效率高，成本低，發(fā)展較快。螺旋焊管的強(qiáng)度一般比冷拔無(wú)縫鋼管高，能用較窄的坯料生產(chǎn)管徑較大的焊管，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(zhǎng)度的直縫管相比，焊縫長(zhǎng)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，大口徑焊管則大多采用螺旋焊。

The production process of cold drawn seamless steel tube is simple, high production efficiency, low cost, rapid development. The strength of the spiral welded pipe than cold drawn seamless steel tube is high, with a narrow billet production of large diameter pipe, can also use the same width of the billet production of different pipe diameters. But with the same length of straight pipe, weld length of 30~100%, and the production rate is low. Therefore, most of the small caliber pipe welded, large diameter welded pipe mostly using spiral welding.

目前螺旋鋼管產(chǎn)品又有了新的產(chǎn)品鋼塑復(fù)合管以熱浸鍍鋅鋼管作基體，經(jīng)粉末熔融噴涂技術(shù)在內(nèi)壁（需要時(shí)外壁亦可）涂敷塑料而成， 鋼管性能優(yōu)異。與鍍鋅管相比，具有抗腐蝕、不生銹、不積垢、光滑流暢、清潔無(wú)毒，使用壽命長(zhǎng)等優(yōu)點(diǎn)。據(jù)測(cè)試，鋼塑復(fù)合管的使用壽命為鍍鋅管的三倍以上。與塑料管相比，具有機(jī)械強(qiáng)度高，耐壓、耐熱性好等優(yōu)點(diǎn)。

The spiral steel pipe products and new products of steel plastic composite pipe to hot dip galvanized steel as matrix, the powder melting spraying technology in the wall (wall also need) coated with a plastic, steel pipe with excellent performance. Compared with galvanized pipe, anti corrosion, no rust, no fouling, smooth, clean, non-toxic, long life etc.. According to the test, the service life of steel plastic composite pipe for galvanized pipe is more than three times. Compared with the plastic pipe, has the advantages of high mechanical strength, good heat resistance, pressure etc..

螺旋冷拔鋼管和冷拔鋼管有什么不同呢？還有就是這兩種鋼管那種好。其實(shí)大可不必糾結(jié)于這個(gè)問(wèn)題。螺旋冷拔鋼管本身就是冷拔鋼管的一種，只是在生產(chǎn)工藝上有些不同罷了。具體說(shuō)來(lái)，焊管按焊縫的形式分為冷拔無(wú)縫鋼管和螺旋焊管。兩者一般使用范圍不一樣。

Spiral steel pipes and steel pipes is what is different? There is the two kind of good steel. You don't need to be entangled in this issue. A spiral cold drawn pipe itself is cold drawn steel tube, only in the production process are different. Specifically, according to the weld pipe into the form of cold drawn seamless steel tube and spiral welded pipe. Both the general scope of use is not the same.

一般DN350以上，會(huì)用螺旋鋼管，螺旋鋼管因?yàn)楹缚p是螺旋的，故所承受液體的壓力會(huì)分布在管子各側(cè)，增強(qiáng)管子的強(qiáng)度。同時(shí)一般大管子如果直接用鋼板直焊卷起，需較大鋼板，大大增加了制作難度，故管徑較大的會(huì)使用螺旋管。至于哪個(gè)好，因?yàn)檫m用范圍不一致，不必去深究。

Generally more than DN350 with spiral steel pipe, spiral steel pipe weld is because of the spiral, so under the pressure of liquid can be distributed on each side of the tube, to enhance the strength of pipe. At the same time, if the general large pipe directly with steel plate welding for large steel plate, rolled up, greatly increased the difficulty of making, it will use large diameter spiral pipe. As to what is good, because the scope is not consistent, do not have to go.

螺旋鋼管(雙面埋弧螺旋焊管)是以帶鋼卷板為原材料,經(jīng)常溫?cái)D壓成型,以自動(dòng)雙絲雙面埋弧焊工藝焊接而成的螺旋縫鋼管。另外還有一種就是卷焊鋼管，它是將鋼板卷筒后焊接，焊縫為豎直焊縫。螺旋焊管是將鋼板螺旋卷筒進(jìn)行焊接，焊縫為螺旋形。

Spiral pipe (double spiral submerged arc welded pipe) is a strip coil as raw material, often warm extrusion molding, spiral with automatic double wire submerged arc welding process double-sided welded pipe joints. In addition there is a welding steel pipe, it is rolling steel plate after welding, the weld seam. Spiral welded pipe is a steel spiral roll welding, weld spiral.

兩者的區(qū)別主要有： 1、前者焊縫是一條直線，而后者是一條螺旋角不同的螺旋線。 2、前者每生產(chǎn)一種規(guī)格的鋼管，就要有一種特定寬度的原料帶鋼或鋼板；后者同一種寬度規(guī)格的帶鋼可以生產(chǎn)出不同直徑的鋼管。 3、由于焊縫形狀的不同，在承受內(nèi)壓時(shí)，螺旋焊縫處合成應(yīng)力是冷拔無(wú)縫鋼管主應(yīng)力的60-85%。因此，在相同工作壓力下，同一管徑的螺旋焊管比冷拔無(wú)縫鋼管壁厚可減小。 4、在中小直徑焊管的生產(chǎn)中，前者具有較大的優(yōu)勢(shì)，在大直徑焊管的生產(chǎn)中，后者具有絕對(duì)優(yōu)勢(shì)。

The main difference between the two: 1, the weld is a straight line, while the latter is a helix helix angle different. 2, the production of each steel pipe specifications, there should be a certain width of the strip steel or steel plate; the same width strip specifications can produce steel tubes with different diameter. 3, the weld shape is different, under internal pressure, welding stress is the synthesis of cold drawn seamless steel tube stress 60-85%. Therefore, in the same working pressure, the spiral welded pipe of same diameter ratio of cold drawn seamless steel pipe wall thickness can be reduced. 4, the small diameter of welded pipe production, the former has more advantages in large diameter welded pipe production, the latter has the absolute advantage.

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