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 YuDate 校对 ：日期 ：Checked by Date 批准 ：日期 ：Approved by Zhanglong DaiDate Code of Practice 编号( No. ) ：COP-0405 版本 ( Version ) ：AProject Code of Me

2、sser China COP 0405 A Page 2 of 7COP 0405 A Permit to Work 12/22/211目的目的 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 sha

3、pe and the size of the 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

4、，间距和高度宜符合焊接作业指导书，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 weldin

5、g manual, The tacking 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 foll

6、ow the designed 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wall thickness内壁错边量edge error5mm0.5mm5mm0.1 且2mm不等厚对接焊件组对时，薄件端面应位于厚件端面之内，当表面错边量超 3mm 或内壁错边量大于 2mm 时，应按设计要求或焊接作业指导书规定对焊件进行加工。The side of thinness

7、 shall be within the side of thickness in the process of fitting up the various butt joints pieces, when the surface of the edge error is over 3mm or the edge error of wall thickness is more than 2mm, The procedure of welding pieces shall be based on the designed requirements or welding operative ma

8、nuals.3焊接工艺要求：焊接工艺要求：The Requirements of Welding Procedure3.1焊丝选用应符合下列规定：The selection of wire shall follow the under-mentioned rules:Project Code of Messer China COP 0405 A Page 3 of 7COP 0405 A Permit to Work 12/22/21a)純铝焊接时，应选用純度与母材相近的焊丝；The selection of wire shall be similar to the purity of the

9、 base material in the process of pure aluminium welding.b)铝镁合金焊接时，应选用含镁量等于或略高于母材的焊丝；The selection of wire shall be not less than the content of magnesium in the base materials in the process of the welding of aluminium and magnesium alloy.c)铝锰合金焊接时，应选用与母材成分相近的焊丝或铝硅合金焊丝；The selection of aluminium and

10、 silicon alloy wires shall be similar to the ingredients of the base materials in the process of the welding of aluminium and manganese.d)异种铝合金焊接时，应选用与抗拉强度高一侧的母材相近的焊丝；The selection of wire shall be similar to the higher side of the tensile strength of the base materials in the process of welding of

11、different aluminium alloy.e)铝及铝合金焊接时，也可以用母材作填充金属；The base materials can be also filled in the metals in the process of the welding of aluminium or aluminium alloy. f) 应符合（GB/T10858）的规定。否则应征得制造厂同意，并经焊接工艺评定合格。3.2手工钨极氩弧焊应采用交流电源。The manual GTAW shall adopt alternating current.3.3焊接前焊件表面应保持干燥，无特殊要求时可不预热。

12、The surface of welding pieces shall keep drying prior to the welding; the preheating is no need to do without specific demand.3.4焊接前应在试板上试焊，当确认无气孔后再进行正式焊接。The test welding shall be held on the test panel prior to the welding; the welding shall be ensuring porosity without existence prior to the weld

13、ing.3.5宜采用大电流快焊施焊法，焊丝的横向摆动不宜超过其直径的 3 倍。The express welding with powerful current shall be taken, the horizontal swing of the wires shall not excess three times of its diameter.3.6引弧宜在引弧板上进行，纵向焊缝宜在熄弧板上熄弧，引弧板和熄弧板的材料应与母材相同。The arc burning shall be held on the arc burning washer, the arc blow out of the

14、 vertical welding seam shall be held on the arc blow out board, the materials of the washers of arc burning and arc blow out shall be the sameness to the base materials.3.7手工钨极氩弧焊的焊丝端部不应离开氩气保护区，焊丝与焊缝表面的夹角宜为 15 度，焊枪与焊缝的夹角宜为 80-90 度。The end of the wires by manual GTAW shall not be departed from the ar

15、gon protective area, the angle between the wires and the surface of welding seam shall be 15 degrees, the angle between welding torch and welding seam shall be within the range of 80-90 degrees. The3.8多层焊时宜减少焊接层数，层间温度宜冷却至室温，且不应高于 65 度，层间的氧化铝等杂物应用机械方法清理干净。Project Code of Messer China COP 0405 A Page

16、4 of 7COP 0405 A Permit to Work 12/22/21The welding passes shall be reduced and the pass temperature shall be cooled to the room temperature of not more than 65 degrees in the process of interpass welding. The sundries such as alumina in the passes etc. shall be cleaned by mechanical process.3.9对厚度大

17、于 5mm 的立焊缝，宜采用两人双 面同步氩弧焊工艺。The procedure of AAW on both sides by two welders shall be taken as the thickness of vertical welding seam is more than 5mm.3.10当钨极氩弧焊前端出现触钨现象时，应进行修整或更换钨极，当焊缝出现夹钨必须处理干净后方可继续进行焊接。The electrode of tungsten shall be repaired or changed when the front side of the GTAW is appea

18、red the phenomena of tungsten-touch, the existence of tungsten in the welding seam should be cleaned prior to the welding.3.11焊件应采用下列防止变形措施：The Protective Measures of Welding Pieces against Distortion:a)焊接顺序应对称进行，当从中心向外进行焊接时，具有大收缩量的焊缝宜先施焊，整条焊道应连续焊完；The welding order shall be held symmetrically, when

19、 the welding is from the center to the outside, the welding seam with large volume of constriction shall weld in advance, the welding bead shall finish welding consistently.b)不等厚度对接焊件焊接时，应采取加强拘束措施，防止对应于焊缝中心线的应力不均匀；The constrained measures shall be taken when the butt joint of welding with asymmetric

20、al thickness so as to protect the stress of the central line of welding seam against being asymmetrical.c)焊件宜进行刚性固定或采取反变形方法，并应有收缩余量。The welding pieces shall take rigid fixation or methods against distortion and have the remaining of shrinking.3.12钢铝接头的焊接：进行钢铝接头焊接时，应必须采取有效措施，严格控制焊接线能量。4焊接环境：焊接环境：Weld

21、ing Condition:定位焊及正式焊接不得在雨（雪）天或相对湿度 80%以上的环境下进行。环境温度在 5以下时冷箱内应有措施。The tack welding& welding cannot be processed under the circumstance of rainy days, snowy days and the humidity is upper than 80%. The ice chest shall be taken measures when the environmental temperature is below 5.5焊接预热：焊接预热：Preh

22、eat Welding当上塔与主冷壁不大于 6时，应预热至。当壁厚大于等于时应预热。Project Code of Messer China COP 0405 A Page 5 of 7COP 0405 A Permit to Work 12/22/21The preheat temperature shall reach 100 in the condition that the distance between the upper tower and the main cold wall is not more than 6mm. The preheat temperature shall

23、 also be reach 100 in the condition that the wall thickness is not more than 8mm.6焊接顺序：焊接顺序：Welding Order6.1根据定位焊后，正式焊接均采用两人同时双面横焊，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 welding on both sides by two welders according to the tack weld

24、ing, when theis 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 after welding shall be rectified about the verticality and level.6

25、.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 be fastened by clean calico and plastic cloth, the surface of the vessel&

26、amp; 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 process of welding work pieces, the special instrument shall be made, an

27、d the arc burning is not allowable on the pipelines.7现场铝合金塔塔体环焊缝的焊接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 site7.1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 the exam and be certificate-carried according with the standar

28、d 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 welding on both sides. The brand and specifications of materials shall

29、 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 not less than 10mm, two welders weld on both sides at same time. Otherwise,

30、one side of groove shall adopt the horizontal welding and add capping.7.3.2预热温度：Preheat temperature: Project Code of Messer China COP 0405 A Page 6 of 7COP 0405 A Permit to Work 12/22/21壁厚10时预热100 Wall thickness10mm, Preheat is100 壁厚10时预热150 Wall thickness10mm, Preheat is 1507.4注意事项 Attention7.4.1焊接

31、环境：雨天或环境相对湿度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 mechanic procedures and ensure the fitting up with enough and symmetric

32、al 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2 量，防止因塔内含2 封气而引起人员窒息。The content of nitrogen in the vessel shall be inspected prior to

33、enter the tower.7.4.5焊接时用于氧乙炔气焊枪预热时，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 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应尽量设法缩短氩气管，为此可将氩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