The examination of welding caliber of flashlight torch has become the most crucial in welding construction. It can discover flaws in the weld at time, figure the principal reason for these defects, timely evaluation, and timely fix the standard of the mill products and reduce the reject rate. All these are complementary to one another, and every defect is't a panacea. Surface flaws can only be seen using the naked eye, for example border, welding and surface porosity.
1.Magnetic particle inspection: use to the crack review on the surface of the narrow wall or the welding seam, and find out the thickness and dimensions of this unsoldered. But, it's tricky to discover the holes, slag and concealed deep flaws.
2.Color detection procedure and fluorescence detection process, also referred to as penetration detection approach. It's acceptable for review of cracks, cracks and layers of metal pressure vessel welding and workpiece surface. When coloring detection, then wash the area with cleansing agent , then use the penetrant, then show together with the screen agent to observe the flaw with all the naked eye. Fluorescence detection is used to assess non-magnetic materials like stainless steel, copper, aluminum and various surface flaws. In addition, it can be used to inspect the density of the weld.
3. X-ray method includes a higher sensitivity to the flaw of the workpiece using a depth of less than 30mm. Gamma-ray penetrability is bigger than X-ray, which may be employed to check steel plates of 300mm thickness using gamma ray flaw detection, and also it may be utilized to check steel plates with a depth of 50mm, which can be less sensitive. X-ray highest sensitivity was 1 percent, the sensitivity of gamma rays is just 2%, however the thickness of the flaw is less than 1.5percent of the depth of the workpiece, however much its flaw area, together with X rays or gamma ray inspection could't be found.
The trimming should begin in the border so far as you can from the border, without perforating the cutting edge. Employing the advantage as the beginning point will prolong the life span of this intake piece. The right technique is to steer the nozzle straight into the edge of the workpiece and then begin the plasma arc. Keep plasma clean and dry plasma system has to be clean and dry plasma can operate normally, smudgy generally gas compression system issues, it is going to enhance the service life of consumable components, non-normal harm. Testing gas quality evaluation technique is cutting torch is situated in the country, a mirror is set in its lower portion, absorb the gas within the cutting torch, should look about the mirror moisture and mist, then you'll want to learn the reason and fix.
Eliminating oxides in the oxygen or air nozzles is utilized to remove the oxide from the nozzles, which impact the airflow and lower the life span of these absorbed parts. Eliminate the oxide in the inside of the nozzle using a sterile flannelette.
