直縫焊管是用謄寫鋼版（bǎn）或鋼帶經曆躬身行禮有關成型，接下來經銲接釀成。按焊縫方式進行劃成直縫焊管和螺旋形（xíng）焊管。按用處又進行劃成通常焊管、鍍鋅焊管、吹氧焊管、電纜套管、米千克秒（miǎo）焊管、托輥管、深（shēn）井泵管、機動車輛用管、進行（háng）悠蕩器管、電弧焊薄壁管（guǎn）、電弧焊異型管和（hé）螺旋形焊管。花木一直縫焊管（guǎn）重點（diǎn）生產操作流程作出說明：
Longitudinal welded pipe is made of steel plate or strip after bending and welding. According to the weld form, it can be divided into straight welded pipe and spiral welded pipe. According to its use, it can be divided into general welded pipe, galvanized welded pipe, oxygen-blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobiles pipe, transformer pipe, welded thin-walled pipe, welded special-shaped pipe and spiral welded pipe. Description of main production process of large diameter straight seam welded pipe:
1.板探：用於製造花木徑埋弧焊（hàn）直縫無縫鋼管的謄寫鋼版參加生產線後，首次開展全板超聲波波進行檢查;
1. Plate prospecting: After the steel plate used to manufacture large diameter submerged arc welded straight seam steel pipe enters the production line, the whole plate ultrasonic inspection is carried out first.
2.銑邊：借助銑邊機對謄寫鋼版雙方緣開展雙（shuāng）麵銑削，使之實現（xiàn）具體要求的板寬、板邊平行線（xiàn）度和坡桑蔭未（wèi）移（yí）狀;
2. Milling: Double-sided milling of steel plate edges by milling machine to achieve the required width, parallelism and groove shape;
3.預彎邊：使用預彎機開展板邊預彎，使板邊具備參加具體要求的曲率（lǜ）;
3. Pre-bending edge: Pre-bending edge with pre-bending machine, so that the edge of the plate has the required curvature;
4.有關成型：在JCO有關（guān）成型有關機上首次將預彎後的謄（téng）寫鋼版的半數（shù）經曆一再步進等（děng）級衝突，壓成"J"形，再將謄寫鋼版的（de）另半（bàn）數同樣地（dì）躬身行禮，壓成"C"形，最終逐漸形成講話的"O"形
4. Forming: On JCO forming machine, first half of the pre-bended steel plate is stamped into "J" shape by several steps, then the other half of the steel plate is also bent into "C" shape, and finally the "O" shape of the opening is formed.
5.預焊：使有關成型後的直縫焊無縫鋼管合縫並（bìng）使用固體維護焊(MAG)開（kāi）展接連（lián）不斷（duàn）銲接;
5. Pre-welding: to make the formed straight seam welded steel pipe seam and use gas shielded welding (MAG) for continuous welding;
6.內焊：使用縱列多絲（sī）埋弧焊(頂多可為四絲)在直縫無縫鋼管螺絲帽開展銲接;
6. Internal welding: Longitudinal multi-wire submerged arc welding (up to four wires) is used to weld the inside of the straight seam steel pipe.
7.外焊：使用縱列多絲埋弧焊在直縫埋弧焊（hàn）無縫鋼管外邊開展銲接（jiē）;
7. External welding: Longitudinal multi-wire submerged arc welding is used to weld the outer side of longitudinal submerged arc welded steel pipe.
8.超聲波波進行檢查Ⅰ：對直縫（féng）焊無縫鋼管裏裏外外焊縫及焊縫側方母材開展100%的進行檢查;
8. Ultrasound Inspection I: 100% Inspection of the inside and outside welds and the base metal on both sides of the weld of the longitudinal welded steel pipe;
9.X陰極射線進行檢查Ⅰ：對裏裏（lǐ）外外焊縫開展100%的X陰極射線工業領域（yù）電視廣播進行檢查（chá），使用圖（tú）象（xiàng）采用相應辦法解決係統以確保探病的靈敏（mǐn）度;
9. X-ray inspection I: 100% X-ray industrial television inspection of internal and external welds, image processing system to ensure the sensitivity of flaw detection;
10.擴（kuò）徑：對埋弧焊直縫無縫（féng）鋼管周長開展擴徑以使原有水平上升無縫鋼管的度量衡精確程度，並改進（jìn）無縫鋼管內剪應（yīng）力的進行散步情況;
10. Diameter enlargement: The whole length of submerged arc welded straight seam steel pipe is enlarged to improve the dimensional accuracy of steel pipe and the distribution of internal stress of steel pipe.
11.水壓進行試驗：在水壓進行試驗有關機上對擴徑後的無縫鋼管開展逐根進行檢查以確保無縫鋼管實現規範（fàn）標（biāo）準具體要求的進行試驗（yàn）壓強，各機具備自動化進行記錄和存儲具體功能;
11. Hydraulic test: The expanded steel pipe is inspected one by one on the hydraulic test machine to ensure that the test pressure meets the standard requirements. The machine has the function of automatic recording and storage.
12.倒棱：將檢查符合標（biāo）準（zhǔn）後的無縫鋼管開展管端進行加工，實現具體要求的管（guǎn）端（duān）坡口度量衡;
12. Chamfering: The qualified steel pipe will be processed to meet the required pipe end groove size;
13.超聲波波（bō）進行檢查Ⅱ：再一次（cì）逐根開展超聲（shēng）波波進行檢查以進行檢查直縫焊無縫鋼管（guǎn）在擴徑（jìng）、水壓後或許形成的進行裂縫;
13. Ultrasound Inspection II: Ultrasound Inspection is carried out one by one again to inspect the possible defects of longitudinal welded steel pipe after diameter enlargement and hydraulic pressure.
14.X陰極射線進行檢查Ⅱ：對擴徑和水（shuǐ）壓進行試驗後的（de）無縫鋼管開展X陰極射線工業領域（yù）電視廣播進行檢查和管端焊縫拍片;
14. X-ray inspection II: X-ray industrial television inspection and photography of weld seam of pipe end after diameter enlargement and hydraulic test;
15.管端磁粉進行檢查：開展關於此項進行檢查以察（chá）覺到管端進行裂縫;
15. Tube end magnetic particle inspection: this inspection is carried out to find the defect of the tube end;
16.冬防（fáng）和塗層：符合標準後的無縫鋼管依據使用者具體要求開展冬防和塗層。
16. Anti-corrosion and coating: qualified steel pipes are anticorrosive and coated according to user's requirements.
