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Recently, some users suggested that I create a WeChat official account to stay informed about the latest developments in chemical calculation apps. So I spent some time creating this official account. The Chemical Calculation APP WeChat official account is an official account based on cloud servers. It not only has the functions of a regular official account but also features rack auxiliary design, which is completely free. Next, I will provide a detailed introduction to the pipe rack auxiliary design function. I. Development Background The \"Standard Drawing for Pipe Trays\" HG/T21629-1999 is a drawing set commonly used in chemical engineering design, and it is widely adopted in the metallurgy, petroleum, chemical industry, and light industry. However, when using this atlas in the pipe rack selection process, it is necessary to verify the torque and pipe weight, and manual calculations are rather cumbersome. However, many designers do not perform any calculations when selecting supports and hangers; they rely solely on experience, which results in the use of support and hanger profiles that are too large and therefore uneconomical. Based on this, the program was developed. II. Technical Features: This program is based on the WeChat Official Account platform; users can start using it after adding that official account. Since it is based on WeChat, users at the project site can still use their smartphones to select supports and hangers as well as check pipe spacing, even if they don’t have the catalog with them. The program is simple and easy to use, and it includes the common types of supports and hangers used in design, such as cantilever beam supports, L-shaped, U-shaped, T-shaped, and gate-shaped ones. In addition to the function of selecting supports and hangers, the program can also calculate the weight of pipes and determine pipe spacing (DN25~DN1000). III. Instructions for Use Before use, search for the WeChat official account “Chemical Engineering Calculations” and follow it. It is recommended to download the Windows version of the WeChat client, as it makes typing more convenient. 3.1 Querying pipe spacing: For example, to find the spacing between three pipes running side by side with diameters of DN100, DN50, and DN250, you can enter “100,+50,+250”. If the pipes are insulated (or insulated from heat), a “+” sign should be added in front; the values of the pipes should be separated by commas (periods or dots can also be used as separators). The feedback provided through the official account includes: the spacing between various pipes, and the load per meter of pipe (with water filled and without water filled). The spacing between various pipelines is determined in accordance with the Chemical Process Design Manual. In the load calculation for insulated pipes, the density of the insulation material is 150 kg/m3, and the density of the pipe is 7900 kg/m3; no safety factor is applied to the load values. The insulation thickness of pipes is based on empirical values; the program predefines the insulation thickness for pipes of various nominal diameters, and users cannot change it. This program is designed for quick calculations, and many of its parameters cannot be changed. If the pipe weight differs from that listed in the manual, there’s no need to worry; the loads specified in the manual are generally on the conservative side. To query the distance between a DN100 pipe and the wall, you can enter “100,” (a comma or period should be added after 100). As shown in the figure below: 3.2 Support frame verification. For example, to check whether it is feasible to place the 3 pipes shown in the figure below on the beveled bracket D24, one can enter “80, +50, 100/d24”. A “+” in front of 50 indicates that the pipe is an insulated pipe. The verification results are as follows; it can be seen from these results that using L50 angle steel is sufficient to meet the requirements. If the verification is successful, it will show as passed. If it is not approved, the calculation will continue using steel with a higher strength. As shown in the figure below: The verification of the pipe rack is carried out based on the weight of the water-filled pipes. The default distance between pipe racks is 4.5 meters; if you want to customize this distance (for example, to 6 meters), you can enter it in the following format: “+250，+150/b14，6”. If you forget how to use it, you can reply with “Help”, “Usage”, or “Instructions”. Well, that’s all the functions of the program. -Don’t you find it boring? -Actually, I think it’s boring too. How about some entertainment? Reply with “1” in the official account, and you will receive a randomly selected Weibo post – it could be a joke, a story, or an online essay. I don’t know what you’ll receive either; anyway, it’s always full of surprises. Don’t overuse this feature; cloud servers have limited memory, and the number of requests is not high either. Please avoid frequently using the official account, as it could cause the server to crash. Finally, if you think what I’ve done is somewhat interesting, feel free to register for the Android version of the chemical calculation app – it offers more powerful functions. I will post all the latest developments regarding chemical engineering calculation apps on this official account from now on. For an introduction to the chemical engineering calculation APP, please see here: https://bbs.hcbbs.com/thread-2693876-1-1.html