【Mechanical Equipment Technology Edition】Daily Question 201801019: Common Faults in Refrigeration Systems (7.2)

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This post was last edited by YORK Industrial Refrigeration on 2018-1-22 at 07:59. Starting from now, in order to enhance communication among users, a 【Daily Question】 activity has been launched on the Mechanical Equipment Technology forum. We hope everyone will participate actively to progress and improve together! ! ! Rewards: 3 wealth points for active participation, 10-15 wealth points for correct answers. This question is valid for two days; no score will be assigned after that period. If the copper tubes of the heat exchanger are damaged and leaking, how should we deal with it? Measures to take after a leak occurs due to damage to the copper pipes: 1. Once a leak is detected in the heat exchanger’s pipe system, the heat exchanger should be shut down immediately to prevent further damage to the pipes and to reduce the extent of the damage. 2. First, identify the leaking pipe by checking for leaks and mark it accordingly. There are two methods for handling this issue in the next step, and one can be chosen depending on the specific circumstances: (1) The pipe sealing method: When the unit is shut down, in the case of leaks in the pipes, it is necessary to first determine the nature and location of the leaks, and then select an appropriate sealing technique to seal both ends of the pipes. Regardless of the tube plugging process used, to ensure the quality of plugging, the end portion of the tube to be plugged must be treated so that the tube sheet and tube holes are smooth and clean, providing a clean contact surface with the plug. In environments where cracks or erosion exist at the junction of the tube and the tube sheet, it is necessary to remove the original tube material and weld metal at the ends so that the plug can make tight contact with the tube sheet. (For port leaks, most copper pipes should be sealed using flared seals; if welding is required, the existing weld metal must be removed before rewelding, and appropriate heat treatment should be applied to eliminate thermal stress.) (2) The method of replacing the copper pipe can also be employed. First, use a tube extractor to remove the damaged copper tube, determine the location and extent of the damage, identify the cause of the damage, and take appropriate measures to prevent it from occurring again. Then, based on the leak testing results, replace the leaking pipes one by one. https://attach01.hcbbs.com/forum/201801/17/090428hvofxbfydrx2btyz.jpg.thumb.jpg ============================== High-quality promotions: Mechanical equipment——Maintenance procedures for York screw compressors https://bbs.hcbbs.com/thread-1806833-1-1.html Mechanical equipment——Upgrading of York Quinton control centers https://bbs.hcbbs.com/thread-1804837-1-1.html Mechanical equipment——Major repairs of GEA Grasox screw compressors https://bbs.hcbbs.com/thread-1800467-1-1.html Mechanical equipment——Disassembly and maintenance of British HOWDEN screw compressors https://bbs.hcbbs.com/thread-1832529-1-1.html Mechanical equipment——Disassembly and maintenance of Japanese Maekawa MYCOM screw compressors https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=