【Daily Question】2015.08.08 Non-destructive testing of steel materials prone to delayed cracking (2 wealth points for a reply; +3–8 wealth points if the answer is correct)

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This post was last edited by FORREST_GUMP on 2015-8-8 09:36. The Mechanical Section has introduced the \"Question of the Day\" feature, which aims to foster an active atmosphere for technical discussions and guide the direction of such exchanges. It also provides users with financial rewards, helping them experience various cool features. Fill-in-the-blank: For spherical tanks manufactured from steel prone to delayed cracking, non-destructive testing of the welds shall be carried out at least ( ) hours after welding is completed. Please note: We will close this thread after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Charisma Reward: Those who post a topic in this section within two days to provide a detailed explanation or discussion of the knowledge points related to this question are asked to reply/comments in this post to inform us, and we will award them 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 and opinions. After registration, we will rank based on the content of the 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. http://bbs.hcbbs.com/thread-1381938-1-1.html Earning wealth by inviting friends http://bbs.hcbbs.com/thread-1389240-1-1.html [Mechanical Section] Collection of essential knowledge 【Seeking manufacturer sponsorship】 (long-term campaign)