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  • 直缝焊钢管的出产过程及直缝焊钢管的规范
  • 本站编辑:杭州双惠金属材料有限公司发布日期:2019-11-21 21:53 浏览次数:

直缝焊钢管的出产过程及直缝焊钢管的规范

  焊管分类有两种,分别为直缝钢管和螺旋钢管他们都是焊接钢管的一种类型,每种钢管在国民出产建设中运用广泛,直缝钢管和螺旋钢管因出产工艺不一样因而具有很多不一样之处,为了让可更简略理解直缝钢管和螺旋钢管的区别。下面我将两种管材进行一下介绍:

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  直缝焊钢管也即是所谓的直缝钢管,出产工艺相对简略,首要出产工艺有高频焊直缝钢管和埋弧焊直缝钢管,直缝管出产效率高,成本低,开展较快。 螺旋焊管的强度通常比直缝焊钢管高,首要出产工艺是埋弧焊。进料——外观查看——机械整理——机械整理——退火——矫直——管头加工——酸洗——中和——水洗——鳞化——皂化——拉拔——查看——切定尺——珩磨——端部加工——矫直——总装——试压——装箱。选用焊缝空隙控制装置来保证焊缝空隙满足焊接请求,管径,错边量和焊缝空隙都取得严峻的控制。直缝钢管出产厂家在确保电弧安稳焚烧的情况下,1丝应尽也许挑选较小电压,以添加1丝电弧的熔深,经焊接实验优化,通常在31~34 V范围内较佳,焊接电流较大或焊丝较粗时可挑选上限,反之挑选下限;后随4根焊丝的电压按顺次增大1~3 V进行挑选,5丝的电弧电压通常在39~43V范围内。焊缝上有连续声波探伤象征的部位,经由手动超声波和X射线复查,如确出缺点,经由修补后,再次经由无损查验,直到确认缺点从前消弭进料——外观查看——机械整理——机械整理——退火——矫直——管头加工——酸洗——中和——水洗——鳞化——皂化——拉拔——查看——切定尺——珩磨——端部加工——矫直——总装——试压——装箱。选用焊缝空隙控制装置来保证焊缝空隙满足焊接请求,管径,错边量和焊缝空隙都取得严峻的控制。直缝钢管出产厂家在确保电弧安稳焚烧的情况下,1丝应尽也许挑选较小电压,以添加1丝电弧的熔深,经焊接实验优化,通常在31~34 V范围内较佳,焊接电流较大或焊丝较粗时可挑选上限,反之挑选下限;后随4根焊丝的电压按顺次增大1~3 V进行挑选,5丝的电弧电压通常在39~43V范围内。焊缝上有连续声波探伤象征的部位,经由手动超声波和X射线复查,如确出缺点,经由修补后,再次经由无损查验,直到确认缺点从前消弭。

  螺旋钢管能用一样宽度的坯料出产管径不一样的焊管,还可以用较窄的坯料出产管径较大的焊管。但是与一样长度的直缝管相比,焊缝长度添加30~100%,并且出产速度较低。因而,较小口径的焊管大都选用直缝焊,大口径焊管则大多选用螺旋焊。

Production process and specification of straight welded steel tube

There are two kinds of classification of welded pipe, straight seam steel pipe and spiral steel pipe respectively they are a type of welded steel pipe, widely used in national produce construction of each steel pipe, straight seam steel pipe and spiral steel pipe due to the production process is different and has a number of different place, in order to let more briefly understand the difference between straight seam steel pipe and spiral steel pipe. Below, I will introduce two kinds of tubes:

Straight seam welded steel tube is also called straight seam steel tube, the production process is relatively brief, the first production process has high frequency welded straight seam steel tube and submerged arc welding straight seam steel tube, straight seam pipe production efficiency, low cost, fast development. The strength of spiral welded pipe is usually higher than that of straight welded pipe. Feed - view the appearance, mechanical finishing, mechanical finishing, annealing, straightening, tube processing, pickling - and - water - scale change, saponification - drawing - view - cut to length, honing, end processing, straightening, assembly, testing, packing. Select the weld gap control device to ensure that the weld gap to meet the requirements of welding, pipe diameter, the amount of wrong side and weld gap are strict control. The straight seam steel pipe manufacturer should select a small voltage as far as possible to add the melting depth of a wire arc under the condition of stable arc burning. After optimization of welding experiment, it is usually better in the range of 31 ~ 34v. When the welding current is larger or the wire is thicker, the upper limit can be selected; otherwise, the lower limit can be selected. After that, the voltage of 4 wires is increased by 1 ~ 3V in sequence, and the arc voltage of 5 wires is usually within the range of 39 ~ 43V. Continuous acoustic detection on the weld symbol parts, through the manual ultrasonic and X-ray check, as did the disadvantages, by way of repair, again through the nondestructive inspection, until faults was offset feed - view the appearance, mechanical finishing, mechanical finishing, annealing, straightening, tube processing, pickling, neutralizing - water - scale change - saponification - drawing - view - cut to length, honing, end processing, straightening, assembly, testing, packing. Select the weld gap control device to ensure that the weld gap to meet the requirements of welding, pipe diameter, the amount of wrong side and weld gap are strict control. The straight seam steel pipe manufacturer should select a small voltage as far as possible to add the melting depth of a wire arc under the condition of stable arc burning. After optimization of welding experiment, it is usually better in the range of 31 ~ 34v. When the welding current is larger or the wire is thicker, the upper limit can be selected; otherwise, the lower limit can be selected. After that, the voltage of 4 wires is increased by 1 ~ 3V in sequence, and the arc voltage of 5 wires is usually within the range of 39 ~ 43V. The welding seam has the continuous sound wave inspection symbol part, through the manual ultrasonic and X-ray review, if confirmed the defect, through the repair, again through the nondestructive inspection, until confirmed the defect before elimination.

The spiral steel pipe can be used to produce welded pipes with different diameters with the same width billets, and it can also be used to produce welded pipes with larger diameters with narrower billets. However, compared with straight seam tubes of the same length, the weld length is added 30~100%, and the production speed is lower. Therefore, straight seam welding is mostly used for small diameter welded pipe, while spiral welding is mostly used for large diameter welded pipe.