卷管接长技术要求.docx

1、卷管接长技术要求拉筋卷制接长（直径在700以下）1. 一次划线:一次划线目的是为接管用，接管的纵缝位置不是随意的，需按单件图指定位置组对接管。2. 切割:接管前的管段切割应留出适当余量，以备接管焊接收缩用。3. 组对:接管组对时需考虑纵缝位置、组对接口处焊口间隙、错皮、以及接长后的弯曲度。4. 二次划线是为了切割马鞍口所做的划线，应参照单件图和划线方案进行。5. 几何尺寸测量:A) 椭圆度:用板尺在被接管的管口处测量。B) 弯曲度:用水平仪和钢丝测量轴线方向，其测量结果应满足技术要求，否则要进行技术调整（可用千斤顶和火焰调整）。接管技术要求:6. 椭圆度最大不超过理论内径的0.75。7. 直线

2、度:在接管过程中及最终完成后，管子的直线度最大为在任意3M管段内管子的直线度不超过3mm，但任意12M内不超过10mm。8. 管子组对允许错皮为0.1倍的壁厚或6.0mm，取其小值。单面焊接时不超过3mm。9. 不等壁厚的管段对接，将大壁厚的管段壁厚超出部分按1:2.5加工成过渡坡口。10. 管子的外周长误差不大于:对管径D650，5; 对管径D650,0.25%理论直径对应的周长。11. 制管及接管时用的临时吊点，临时支撑，定位块等用后必须切掉并打磨干净，不能伤及母材。导管/立柱卷制接长（直径大于1000）1 技术要求1.1 管的椭圆度： Dmax-Dmin6mmDmax: 最大管径Dmin

3、: 最小管径1.2 管周长(外皮)公差：为0.25%的理论周长。1.3 管端部垂直度5mm。1.4 纵缝、环缝对接错皮要求：0.1倍壁厚或6 mm 取小值。单面焊接时不超过3mm。1.5 接长后，导管总长允许公差：020 mm。1.6 接长后的弯曲度不超过下列给定值：3m以内（包括3m） 3mm；12m 以内（包括12m） 10mm;12m以上 12mm1.7 导管的环纵缝组对间隙及坡口按焊接程序进行。过度坡口1：3。1.8 制管及接管时用的临时吊点、临时支撑、定位块等用后必须切掉并打磨干净，不能伤及母材。需要及时防腐。1.9 如果焊接需要预热，按照焊接程序进行。1. description概

4、述1.1 This structural pipes rolling procedure consists of the process of rolling plates to pipes and the process of pipe splicing.本结构钢管卷制程序包括板材卷管及管材接长程序。1.2 This procedure describes in detail the overall fabrication process, which starts from preparation of steel plates to rolling, welding, inspectio

5、n etc.本程序详细描述了整个建造过程，包括板材准备到卷制、焊接、检验等。1.3 This procedure was established in accordance with such standards as API 2B, AWS D1.1 and API RP2A.本程序按照API 2B, AWS D1.1 和 API RP2A等标准编制。2. DETAILS OF PROCESSESPROCESSDESCRIPTION1. Pipe Manufacture卷管 Prior to cutting, all materials shall be inspected and acce

6、pted according to inspection procedure所有材料在切割之前，需根据检验程序验收。1.1 Plate cutting 板材切割1. Decide plates type, grade and brand.确认板材的型号、等级和炉批号。2. Note if there are special property requirements for the plates, e.g. “Z” direction property. 材质有特殊要求的板材要特别注明，如“Z”向性能板。3. Decide cutting lines and rolling direction

7、 of plates according to prescribed pipe size 按照管的尺寸确定切割线和板的卷制方向。4. Cutting with flame cutting machineDouble bevel cutting before rolling(diameter more than 610mm ), single bevel cutting after rolling (to see 1.3 ) 用火焰切割机具切割双坡口在卷制前切割（直径大于610mm），单坡口在卷制完成后切割（参看1.3项）。5. Dimensional inspection before and

8、 after cutting.切割前后都必须检查尺寸。1.2 Edge crimping 卷边Plate edges are crimped by pressing to the prescribed radius before forming.卷制前按照规定的半径对板材压边。 Cutting again 再次切割Cut off edge bevel and perform beveling. 把板材边缘切成斜角形成坡口。1.4 Plate rolling 板材卷制Plates shall be rolled from the edge side first and then symmetri

9、cally rolled to the prescribed pipe radius.从板材的边缘开始按照规定的半径对称均匀卷制。Notes 说明:1. The edge is crimped by pressing.压边。2. If edge crimping is difficult due to the large thickness or high yield strength of the plates, use roll forming only.如果板材因过厚或者屈服强度过高压边困难，可直接卷制。3. Pressing of upper roll shall be gradual

10、ly increased so that the required radius can be gradually achieved.逐渐增大上滚轮的压力，逐步达到要求的半径。4. During forming, limits of the rolling machine shall be used for avoiding pipe plate from longitudinal deviation.在卷制的过程中，利用卷管机的限位避免板材出现纵向的偏离。5. 60 degree inside arc template panels shall be made according to re

11、quired diameters for the inspection of pipes according to the requirements described.根据直径制作60度内弧检测样板，按要求检测卷制钢管。6. When loaded on and off the rolling machine, plates and pipes shall be kept from damage caused by lifting slings and clamps.卷管机在加载和卸载时，要避免板材和管材被吊索或卡具损伤。1.5 Tack welding of longitudinal se

12、am fit-up纵缝装配定位焊Root gap and high-low of longitudinal seam shall be adjusted with suitable clamping apparatus and then fastened by tack welding, the total length of which shall be long enough to achieve the fastening strength required. Each section of tack weld shall be no less than 50mm, and in lin

13、e with the requirements of welding procedure.纵缝的焊跟间隙和错皮要使用合适的夹具工具进行调整并用定位焊固定，定位焊焊缝总长要足以保证强度要求，每段定位焊长度应不小于50mm，并要满足焊接程序的要求。1.6 Fit-up inspection 装配检验Fit-up inspection shall be performed with inside arc template panel and rulers according to API 2B and related welding procedure.根据API 2B和相关的焊接程序，利用内弧检测

14、样板和直尺进行装配检验。1.7 Tab welding引弧焊Run-on and run-off tabs shall be welded at the both ends of longitudinal weld seam of pipes rolled from plates. The tabs, which are 100mm long, shall be consistent with the pipe in groove, thickness and curvature.在卷制管的纵缝两端要使用引弧和熄弧板，弧板长100mm，坡口、板厚和曲度与钢管一致。1.8 Longitudina

15、l root welding纵向封底焊See welding procedure for details.详见焊接程序。1.9 Internal welding of longitudinal seam纵缝内侧焊接See welding procedure for details.详见焊接程序。1.10 External gouging of longitudinal seam 纵缝外侧打磨Before external welding, root gouging on external side, including all the tack welds and root welds, shall be performed. Finally the groove shall be ground to remove carbon layer and other defects.焊前必须清根，包括定位焊和封底焊，彻底清除掉碳化层和其它有害物质。1.11 External welding of longitudinal seam纵缝外侧焊接See welding procedure for details.详见焊接程序。1.12 Tabs removal弧板