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Fluidized bed reactor coil of welding

No. 3 within the 30mm oil, paint, rust and dirt clean and polished, so as not to produce porosity in the welding process, affecting the quality of welding. Welder welding process to be familiar with the requirements of the card, and well known process parameters, welding process parameters in Table 1. Welding parameters decline a kind of memorial essays pick-4t current welding layer Rights welding (mu / catch degrees m) oxygen flow ● () (1. / I blood) deposited lGTW flow parameters are:. aI. 4 ∞ a 1 ∞ 10 ∞ 3-4 throw a 4-1210-15 (2) Welding: Using high frequency voltage electric shock and welding pieces of tungsten arc ignition between the air DC arc welding machine, (if using DC welding machine gun directly contact with the groove and tungsten arc ignition, easy to affect the weld quality of welding of tungsten folder). In the first layer welding, arc ignition,[link widoczny dla zalogowanych], it will melt then add wire groove to form a pool to move forward after the gun a little then add a drop wire. To ensure that the roots of fusion, adding a drop of hot metal welding,[link widoczny dla zalogowanych], and observed with a bean-sized pool in front of the Rong Dong, adding the next drop of molten iron, welding torch up and down and make a slight swing to ensure that the mouth of the fusion on the downhill. Should be noted that in Canada the process of welding wire, welding wire not out of the scope of protection of argon gas; because the end of the wire will melt in the high temperature state, once out of the scope of the protection of argon gas, the wire ends will be oxidized, it will add pool affect the welding quality. Fill and cover surface of the welding process, to make the axis with the welding torch into the surface of about 75. Angle, arc ignition in place after a short swing, until the weld pool and then add the trail required for the formation wire. Plus wire, the wire should be made relative to the tube surface tilt l5. Angle, and slowly, back and forth to the bath to give, wire must be uniform. Remember in the process of wire, wire must not come into contact with tungsten, or tungsten may be contaminated, increasing the burning of tungsten. Welding process should also be noted from the arc and the local extinction can not overlap, be staggered, the tubes arranged closely, stagger the distance to l0-15mm is appropriate. Welding the end of the wire should be a little more certain, then gradually speed up, then slowly put out the arc, to avoid too deep crater and weld pool cooling too fast and defects. The rotation of the operation is carried out by two welders because the coil spacing is only 100mm, not from the side of the other side simply had to be half of the two welders weld the welding, and the multi-layer multi-pass welding, hands open Bow before the actual welding operation,】 Figure l: o: o. A o =. L welding operations that circle the first right-handed welder welding along the direction of 0180 to 135 ~. , Handed the torch left, then left along the 180 direction of welding to 135o hit head. Then the second right-handed welder 180 to the 0o direction along the weld to 315 ~, and then left along the 270 direction to the welding 0o to 315o, so back and forth until the solder until the end of a level crossing. 4,[link widoczny dla zalogowanych], the welding quality inspection work is completed, the Japanese side of the weld quality inspection satisfied with the appearance of intrinsic quality, but more concern. He said that this welding method can achieve 80% pass rate on the good, as in other parts of the construction,[link widoczny dla zalogowanych], even in Japan, with a pass rate of almost 9o% never had before. In the testing results come out, Japanese experts stunned and immediately asked through an interpreter, which welders welding, welders were three of us were present, the translation to tell him, he patted the shoulder welder, his mouth said OK, OK , while praising our thumbs. During the construction of the reactor coil, a total of 96 weld, 384 film, a perspective all qualified, a pass rate of 100%, which is the construction of acrylonitrile wrote a glorious page.