冷箱内铝合金及管道焊接工艺要求_standard

1、 梅塞尔中国工程规范 Project Code of Messer China 铝合金及管道焊接工艺要求 THE STANDARD OF WELDING PROCEDURE OF ALUMINIUM ALLOY AND PIPELINES 编制：于文盛 日期： Made by Wensheng Yu Date 校对： 日期： Checked by Date 批准： 日期： Approved by Zhanglong Dai Date Project Code of Messer China COP P405 A Page 2 of 7 COP 0405 A Permit to Work 03/

2、30/13 Code of Practice 编号(No. ) : COP-0405 1 目的 Purpose 规范冷箱内铝合金及管道焊接(TIG )工艺操作技术要求及焊接作业指导书的规定。 To standardize the on-site manual of Aluminium Alloy and pipeline in Cool Box. 2 焊前准备 Welding Preparation: 2.1 焊件坡口形式和尺寸应符合设计和焊接作业指导书的规定 ，坡口加工表面应进行清理，并 达到平整光滑，无毛刺和飞边、垫板及焊丝进行清理。 The shape and the size of t

3、he groove of the welding pieces shall be followed the designed rules and welding operative manual. The surface of the groove process shall be cleaned, level without burrs and overlaps, the washer and wires shall also be cleaned. 2.2 焊件组对中，焊接定位焊缝时，应采用与正式焊接相同的焊丝和焊接工艺并应由合格焊 工施焊，定位焊缝的长度，间距和高度宜符合焊接作业指导书，

4、正式焊接前应对定位焊 缝进行检查，当发现缺陷时，应及时处理。 The selection of the wires and welding procedure shall be the same as the welding operated by qualified welders in the process of tack welding for fitting up the welding pieces.The length, space and height of the tack welding seam shall follow the welding manual, The t

5、acking welding seam shall be inspected and the defects shall be dealt with prior to the welding. 2.3 当焊缝背面需加垫板时，垫板材质应符合设计规定或与母材相同，开有容纳焊缝根部的 沟槽。 When the back of the welding seam needs to plus washer, the materials of the washer with slots opened in the root of the welding seam shall follow the desig

6、ned rules or the sameness to the base materials. 2.4 管道的对接焊缝内壁应齐平，内壁错边量应符合下例规定： The butt joints of the wall of the welding seam shall be leveled: 壁厚 内壁错边量 wall thickness edge error 5mm 5mm 8mm时复盖层可用单人焊 接。特别注意：定位焊后塔体可能引起的垂直度及塔板水平度变化确定，即利用焊 后变形进一步矫正垂直度及水平度。 All the welding shall be taken as horizontal

7、 welding on both sides by two welders according to the tack welding, when the 8 is not less than 8mm, the covered passes can be used by single welding. Special Attention: The column may cause the change of verticality or the level of the tower washer in the completion of tack welding. The distortion

8、 after welding shall be rectified about the verticality and level. 6.2 在冷箱内各容器管口接管前需要用干净的白布或塑料布扎口，以免油脂及污物进入，对 冷凝蒸发器内施焊时，严禁火焰或电弧击伤容器及管道表面。工件焊接时，电缆搭铁 （二次线）不允许随意乱搭在工件上，应做专用工具，不允许在管道上引弧。 In order to avoid greases and feculences being entered, each nozzle of vessel in the ice chest shall be cleaned and b

9、e fastened by clean calico and plastic cloth, the surface of the vessel& pipelines shall be forbidden hurting by flame and electric arc in the process of welding in the condensative evaporator. The cable joint with iron of earth wires is not allowed to be built on the work pieces at will in the

10、process of welding work pieces, the special instrument shall be made, and the arc burning is not allowable on the pipelines. 7 现场铝合金塔塔体环焊缝的焊接 The circular welding of the column of aluminium alloy tower on site 7.1 担任塔体环焊缝焊接的焊工应按本标准规定要求经考试合格持证上岗。 The welders of annular welding of the tower shall pass

11、 the exam and be certificate-carried according with the standard regulation. 7.2 环焊缝处横焊位置，焊工应按“双面横焊”要求进行操作技能的考试，考试用材的牌 号，规格应与实际产品一致。 The position of horizontal welding in the annular welding seam, the welder shall be passed the operative skills examine according to the requirements of horizontal wel

12、ding on both sides. The brand and specifications of materials shall be identical to the factual products. 7.3 立装塔环焊缝焊接工艺： The welding procedure for the annular welding seam of vertical installing tower: 7.3.1 焊接方法：双人双面同时横焊，当壁厚 A 10 mm时，坡口侧采用单人单面横焊 加复盖层； Welding Procedure: When the wall thickness is

13、not less than 10mm, two welders weld on both sides at same time. Otherwise, one side of groove shall adopt the horizontal welding and add capping. 7.3.2 预热温度： Preheat temperature:壁厚 10 mm时预热100 C Wall thickness 10mm, Preheat is 150C 7.4 注意事项 Project Code of Messer China COP P405 A MESSER Page 6 of 7

14、 COP 0405 A Permit to Work 03/30/13 Attention 7.4.1 焊接环境：雨天或环境相对湿度 A 90%时不得施焊。 Welding condition: The welding is forbidden under the circumstance of rainy days or the relative humidity is not less than90 % . 7.4.2 坡口加工采取机械方法，并确保组对，定位焊时有足够的，均匀的间隙。 The process of groove is suggested to adopting mechan

15、ic procedures and ensure the fitting up with enough and symmetrical clearance in the process of welding. 7.4.3 塔环焊缝正式施焊开始后，中途焊接中断时间不得超过 15分钟。 After the beginning annular welding of tower, the stoppage time in the process of welding shall not be over 15 minutes. 7.4.4 进入塔内前应检查容器内含N 2量，防止因塔内含N 2封气而引起人

16、员窒息。 The content of nitrogen in the vessel shall be inspected prior to enter the tower. 7.4.5 焊接时用于氧乙烷气焊枪预热时，应在塔外侧预热，并避开坡口区。 Preheating by oxy-acetylene welding torch in the process of welding shall preheat outside of tower and avoid the groove area. 7.4.6 双面双人同时横焊及单人单面复盖焊时应选择合理的焊接顺序，保证塔体的直 垂度。 The

17、selection of welding order shall be reasonable and ensure the verticality of tower in process of welding by two welders on both sides and cover welding on one side. 7.4.7 应尽量设法缩短氯气管，为此可将氧气瓶放在接近施焊区域的平台上。 The argon gas cylinders shall be laid on the flat roof adjacency to the flat roof so as to try ef

18、fort to be shortened the argon gas pipeline. 7.4.8 进入冷箱前应严格检查焊接电缆及接地线是否绝缘，杜绝焊钳与容器及铝合金 管道接触造成短路。 Whether the welding cables and grounding lines are insulated shall be strictly inspected prior to the entrance of cool box, the vessels and the pipelines of aluminum alloy are forbidden. 7.4.9 冷箱内钢结构及管托支架的焊缝，必须采用不锈钢焊条进行焊接。 The welding seam of the structure within the steel of cool box and pipeline bracket should adopt stainless steel welding rod to welding. 7.4.10 冷箱内管架的焊接及冷箱焊接： The welding of the bracket of pipelines