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Tube digestion device manufacturing process heater casing Discussion

Projects in line with the welding project. Electrode grade in strict accordance with JB/T4709-2000 \Select the correct welding consumables, the need for drying the welding consumables, must be dried under the temperature and record. Because the pipeline of the body led to the diversification of the base metal welding of many varieties: Depending on the base metal were selected welding consumables such as: inner tube 12CrtVbV114 × 9; with HOBC, (} 2.5 wire, the whole arc welding. Outside tube (} 426 +37716 Mn wire with H10MnSi.5 backing, J5O63.2 ~ 4 electrode filling and capping. outer tube 20 # +530, +426 with H () 8 Ⅳ h12Si.5 wire grounding, J4273.2 ~ 4 electrode filling and capping. Inner tube: 12Crt ~ with R2O73.2 electrode, Q235 +12 CnVL) electrode with the J427, Q235 +16 Mn with J422 electrodes. 3.2.2 welding equipment welding equipment to ensure the need to adapt to long working hours, paper the introduction of a number of specialized units with excellent performance of new welding machine: YD A 400SS3HGE; YD a 300TSPVI'A, to protect the welding equipment, erection of a neat scene of a welding machine shed, with a special low-voltage distribution cabinet 3.2.3. group of welding heater in accordance with the GB150 - 1998 \steel pressure vessel welding procedures \groove-site processing, external works lathe groove, set when the inner tube group dedicated counterparts fixtures, and select the correct space group and the group order. outer tube group set when the corresponding positioning of the line, to prevent the inner tube production distorted. 3.2.4 Welding Inspection of all welds in accordance with the JB4730 - 94 {non-destructive inspection pressure vessel cells, blocking the foot plate and the weld inside the tube magnetic particle testing, engineering-level qualified. appearance of all welds inspected weld surface shall not have holes, craters, slag,[link widoczny dla zalogowanych], cracks and other defects. on the failed welds should be repaired,[link widoczny dla zalogowanych], repairing the same place no more than two. 3.2.5 weld heat treatment in order to eliminate the internal stress generated by welding , all within the tubes 114 × 912C ~ Vlov weld Tracked heater electric heating to heat treatment, heat treatment temperature is 650 ~ 700 ℃,[link widoczny dla zalogowanych], and strictly control the heating and cooling rates. 3.2.6 hoisting technology will make a good 36m pipe Lifting from the temporary pipe rack to the official pipe rack, mainly by setting the pipe rack in the middle of timing F0/2313 type crane to complete, for some heavier tonnage of pipe sections, using both sides of the pipe rack 35T or 50T crane with the lifting. 3.2.7 heater manufacturing quality manufacturing quality of the casing as shown in Figure 5. anxious \ quality and poor awareness of \ unstable condition \ develop scientific strength physically incompetent \ overload damage to the \ performance difference \ implementation does not Figure 5 tube heater strict manufacturing quality analysis of Figure 4, the pipeline of hydraulic test equipment for the manufacture of the heater casing to make a full and comprehensive quality inspection in manufacturing has been completed, should the inner tube and shell side hydraulic pressure test . 4.1 pressure test range of 4 to L shoulder blade diaphragm exit section of the entrance, L shoulder blade segment, BWT8 ~ BWT1 Section: SWI'I ~ SWI'4 Section 4 114 × 912Cr Ⅳ bV tube, w section of pipe and 4 remain cans. stay tank valve pipe exports to the terminal. I segments, BWI8 ~ Section: SWYl ~ SWI'4 section of the shell and shell BWI8 ~ BWT1 steam, condensate water pipeline. test \4.2% for ultrasonic flaw detection test pressure test results, Ⅱ grade qualified. ()()% ray tube through a testing, II-class heater casing pressure test results together in Table 2. Table 2 casing pressure test results Table 5 Conclusion After inspection and testing, both inside and outside the casing pipe manufacturing quality heaters have reached the national standard requirements. through 72 hours of operation and performance evaluation with the material, the heater casing overall performance reached the design requirements, the whole system parameter stability, the optimization of production and the growing technical indicators, and some indicators even more than the effect of the introduction of devices. Practice has proved that the casing pipe of the heater manufactured by the above process is feasible and successful,[link widoczny dla zalogowanych], is available for reference on similar projects with a value of application. (Editor Liu where) the reasons for making quality

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