【Daily Question】December 8, 2015: Welded joints of pressure vessels (Top 50 participants + 2 rewards)

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This post was last edited by gn_1984 on 2015-12-9 at 09:38. In order to increase the popularity of the heat exchange section, a \"Question of the Day\" activity has been introduced there; this helps to foster an active atmosphere for technical exchanges while also providing members with certain financial rewards. 【Daily Question】Which of the following combinations all belong to Category E welding joints? （） ； ①Takeover and cylinder welding ； ②Junction between cylinder and head ； ③Skirt casing and lower head corner joint ； ④Support pad plate and cylinder joint ； ⑤Support ring and inner wall of cylinder ； ⑥Type A flange and cylinder weld ； ⑦Tube sheet and shell side cylinder: A.①②③④⑥; B.③④⑤⑦; C.③④⑤⑥⑦; D.③④⑤. Correct answer: D. (Explanation: ① They are mostly Class D welds; of course, they are Class A welds when embedded) ； ②Most are Class B welds; the joint between the cylinder and the spherical head is a Class A weld ； ③④⑤Class E welds ； ⑥It is a Class C weld ； ⑦There are Class C welds as well as Class B welds.) Reply with your answer in the comments to participate; you will receive +2 wealth points (automatic awarding of wealth points is enabled; no additional points or comments will be given if your answer is incorrect). If you answer all questions correctly, you’ll get an additional +3 to +8 wealth points. Extra rewards will also be given if you provide a thorough analysis and explanation for the questions or answers, or if your explanations are based on standard criteria. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help provided). Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator award you charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights. After registration, we will rank participants based on the content of their posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score earning +5 charm. Other content: AC version of heat exchange equipment – “One question per day” contest (prizes for participation; valid indefinitely) http://bbs.hcbbs.com/thread-1320941-1-1.html. The competition for “Active Users” and “Weekly Stars” in the Mechanical Forum has begun http://bbs.hcbbs.com/thread-1489069-1-1.html. Recruitment for forum moderators and technicians in the [Mechanical Forum] – applications and referrals are welcome. [Valid indefinitely] – Come if you’re interested! 】http://bbs.hcbbs.com/thread-1288857-1-1.ht【Mechanical Section】In-depth guide to preventing freezing of equipment during winter http://bbs.hcbbs.com/thread-1502793-1-1.html Chemical equipment and machinery