储罐焊接的常规要求? 焊接常规要求 Conventional requirements for welding 焊接设备与焊接材料应相互匹配,并应满足焊接工艺的要求,焊机应配置符合计量要求的 电压表 、 电流表 。焊机应有防护设施和可靠的接地。The welding equipment shall match welding material each other, and shall meet the requirement of welding procedure. The welding machine shall be equipped with voltmeter and ammeter that are in compliance with metering requirement. Welding machine shall be provided with protective facilities and shall be reliably earthed. 碱性焊条J507、J427在使用前必须进行按规定进行烘烤。必须防止焊条混用。对焊接材料的入库、烘烤、发放、使用和回收建设管理制度。焊条库的设置应符合相应的要求。The alkalescency weld rods of J507 and J427 must be firing before using. And the mixed use is strictly forbidden. The management system on how to storage, firing, distribution, use and callback will be built up. The weld rods’ warehouse will be set up accord with the related requirements. 定位焊及工卡具的焊接,应由合格焊工担任,焊接工艺应与正式焊接相同,引弧和熄弧,应在坡口内或焊道上进行。定位焊缝的长度,不宜小于50mm ;Tack welding and the welding for tools and clamps shall be performed by qualified welders; and the welding procedure shall be the same as that of formal welding. Arc striking and arc extinguishing shall be performed inside groove or welding bead. The length of tack weld shall not be less than 50mm. 施焊前,应清除坡口表面的锈蚀,油脂及其它污物,并对焊接坡口角度,对口间隙、错边量进行检查,且应符合要求。Care shall be paid to remove the rust, grease and other pollutant on the surface of groove prior to welding; and the angle of groove, butt gap and mismatch shall be checked, and shall be in compliance with relevant requirements. 焊接中应保证焊道始端和终端的质量,始端应采用后退起弧法,终端应将弧坑填满,多层焊的层间接头应错开50mm以上。The quality of the initial end and terminal shall be ensured during welding. The backward arcing process shall be adopted at initial end; the arc crater at terminal shall be made full. For multi-layer welding, the joints of interlayer shall be staggered for above 50mm. 严禁在坡口外引弧,要防止在罐壁板上打火,如果出现要及时修补。Arc striking outside groove is strictly prohibited. Care shall be paid to prevent from striking fire on shell plate; if such a case occurs, repair shall be carried out on a timely basis. 在下列任何一种环境中施焊时,应采取有效的防护措施,否则不得进行焊接;When carrying out welding in any of the following environment, effective protective measures shall be taken; otherwise, welding shall not be carried out: 雨天或雪天;In rainy days or snowy days 手工焊时,风速大于 8m/s ;Wind velocity exceeds 8m/s when adopting hand welding; 大气相对湿度超过90%。The relative humidity of the atmosphere exceeds 90%; 环境温度小于2度. The ambient temperature is lower than 2 degrees.查看更多4个回答 . 1人已关注