• 螺旋鋼管的生產工藝
  • 本站編輯:杭州亨鑫鋼鐵有限公司發布日期:2019-07-25 14:45 瀏覽次數:
(1)原材料即帶鋼卷,焊絲,焊劑。在投入前都要經過嚴格的理化檢驗。
(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焊。
(3)成型前,帶鋼經過矯平、剪邊、刨邊,表面清理輸送和予彎邊處理。
(4)采用電接點壓力表控制輸送機兩邊壓下油缸的壓力,確保了帶鋼的平穩輸送。
(5)采用外控或內控輥式成型。
(6)采用焊縫間隙控制裝置來保證焊縫間隙滿足焊接要求,管徑,錯邊量和焊縫間隙都得到嚴格的控制。
(7)內焊和外焊均采用美國林肯電焊機進行單絲或雙絲埋弧焊接,從而獲得穩定的焊接質量。
(8)焊完的焊縫均經過在線連續超聲波自動傷儀檢查,保證了100%的螺旋焊縫的無損檢測覆蓋率。若有缺陷,自動報警并噴涂標記,生產工人依此隨時調整工藝參數,及時消除缺陷。
(9)采用空氣等離子切割機將鋼管切成單根。
(10)切成單根鋼管后,每批鋼管都要進行嚴格的首檢制度,檢查焊縫的力學性能,化學成份,溶合狀況,鋼管表面質量以及經過無損探傷檢驗,確保制管工藝合格后,才能正式投入生產。
(11)焊縫上有連續聲波探傷標記的部位,經過手動超聲波和X射線復查,如確有缺陷,經過修補后,再次經過無損檢驗,直到確認缺陷已經消除。
(12)帶鋼對焊焊縫及與螺旋焊縫相交的丁型接頭的所在管,全部經過X射線電視或拍片檢查。
(13)每根鋼管經過靜水壓試驗,壓力采用徑向密封。試驗壓力和時間都由鋼管水壓微機檢測裝置嚴格控制。試驗參數自動打印記錄。
(14)管端機械加工,使端面垂直度,坡口角和鈍邊得到準確控制。

(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.