09-09-14** Question —— (Enter to win a prize)

Thread Content

This post was last edited by jia717 on 2009-9-14 22:14. True or False questions: 1. GB151-1999 \"Shell and Tube Heat Exchangers\" stipulates that the seal surface of the partition groove should be level with the annular seal surface, or slightly above it. 2. Strength welding is suitable for use in heat exchangers that are subject to vibration or fatigue. 3. For the unit cells of plate-fin heat exchangers, the allowable length for repair welding of the brazing seams shall not exceed 1% of the total length of the seal on that face. This question was provided by member luhongtai; the provider should keep an eye on it. The purpose of this* topic is to help everyone review some basic theoretical knowledge, gain new insights by reviewing what has been learned before, discuss and gain a deeper understanding of standards or specifications, as well as address specific issues encountered in practice. This enables us to learn together and improve together; all fellow enthusiasts are welcome to participate actively. If you have good *questions, you can also provide them to us; we will offer certain rewards to those who provide them. For more details, please refer to the top post in the heat exchange forum titled “Special Thread for Collecting Questions on Heat Exchange Zone Technology”, with the link: http://bbs.hcbbs.com/thread-526242-1-1.html. Note: 1. For fill-in-the-blank, multiple-choice, and true/false questions, please reply in hidden format (for specific methods of hiding replies, see http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8). Rewards will be given to those who answer correctly; those who do not use hidden formatting or revise their replies will not receive any rewards. Please cooperate actively. 2. For multiple accounts under the same IP, only the first response counts as valid. Answers: 1. Wrong 2. Wrong 3. Wrong