• 螺旋钢管的生产工艺
  • 本站编辑:杭州亨鑫钢铁有限公司发布日期:2019-07-25 14:45 浏览次数:
(1)原材料即带钢卷,焊丝焊剂。在投入前都要经过严格的理化检验。
(2)带钢头尾对接,采用单丝或双丝埋弧焊接,在卷成钢管后采用自动埋弧焊补焊。
(3)成型前,带钢经过矫平、剪边、刨边,表面清理输送和予弯边处理。
(4)采用电接点压力表控制输送机两边压下油缸的压力,确保了带钢的平稳输送。
(5)采用外控或内控辊式成型。
(6)采用焊缝间隙控制装置来保证焊缝间隙满足焊接要求,管径,错边量和焊缝间隙都得到严格的控制。
(7)内焊和外焊均采用美国林肯电焊机进行单丝或双丝埋弧焊接,从而获得稳定的焊接质量。
(8)焊完的焊缝均经过在线连续超声波自动伤仪检查,保证了100%的螺旋焊缝的无损检测覆盖率。若有缺陷,自动报警并喷涂标记,生产工人依此随时调整工艺参数,及时消除缺陷。
(9)采用空气等离子切割机将钢管切成单根。
(10)切成单根钢管后,每批钢管都要进行严格的首检制度,检查焊缝的力学性能,化学成份,溶合状况,钢管表面质量以及经过无损探伤检验,确保制管工艺合格后,才能正式投入生产。
(11)焊缝上有连续声波探伤标记的部位,经过手动超声波和X射线复查,如确有缺陷,经过修补后,再次经过无损检验,直到确认缺陷已经消除。
(12)带钢对焊焊缝及与螺旋焊缝相交的丁型接头的所在管,全部经过X射线电视或拍片检查。
(13)每根钢管经过静水压试验,压力采用径向密封。试验压力和时间都由钢管水压微机检测装置严格控制。试验参数自动打印记录。
(14)管端机械加工,使端面垂直度,坡口角和钝边得到准确控制。

(1) Raw materials are strip coils, welding wire, flux. Strict physical and chemical testing is required before input.
(2) The steel head and tail are butt jointed, and the single wire or double wire submerged arc welding is used, and the automatic submerged arc welding is used after the steel pipe is rolled.
(3) Before forming, the strip is leveled, trimmed, planed, surface cleaned and pre-bent.
(4) The electric contact pressure gauge is used to control the pressure of the cylinder on both sides of the conveyor to ensure the smooth conveying of the strip.
(5) Adopt external control or internal control roll molding.
(6) The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the weld gap are strictly controlled.
(7) Both inner and outer welding are performed by single-wire or double-wire submerged arc welding using a Lincoln electric welder in the United States to obtain stable welding quality.
(8) The welded seams are all inspected by online continuous ultrasonic automatic injury inspection to ensure the non-destructive testing coverage of 100% spiral welds. If there is a defect, the alarm is automatically alarmed and sprayed, and the production worker adjusts the process parameters at any time to eliminate defects in time.
(9) The steel pipe is cut into individual pieces by an air plasma cutting machine.
(10) After cutting into a single steel pipe, each batch of steel pipe shall undergo a strict first inspection system to check the mechanical properties, chemical composition, fusion condition, surface quality of the steel pipe and non-destructive testing to ensure the pipe making process. After that, it can be officially put into production.
(11) The part of the weld with continuous acoustic flaw detection mark, after manual ultrasonic and X-ray review, if it is defective, after repair, it will pass the non-destructive test again until it is confirmed that the defect has been eliminated.
(12) The tube of the butt weld of the strip and the joint of the butt joint intersecting the spiral weld are all inspected by X-ray television or film.
(13) Each steel pipe is subjected to hydrostatic pressure test and the pressure is radially sealed. The test pressure and time are strictly controlled by the steel pipe water pressure microcomputer detection device. Test parameters are automatically printed and recorded.
(14) The pipe end is machined to make the end face verticality, groove angle and blunt edge accurately controlled.