You will get a lot of good ideas that you might want in your standards. However it would be wise to read through a few of these standards and at least get some idea of what the structure should be (look at the table of contents). I am not saying that I would suggest taking another Company's Standards and adopt them by simply changing the company name on the cover. Rather I would want to build on the Standards that were developed by others. If I did not have much experience, I would not want to develop a set of corporate piping design Standards from scratch. You will of course have to address those exceptions in "your" standard. Your D>2", dT>100 Deg C) criteria is not bad for a start but there should be exceptions "allowed". Note that the ASME Piping Codes do not require an analysis of every piping system - so in this regard hey are vague. Most larger CPI and HPI corporations have in-house Standards that guide the design of piping systems and in many cases those standards include some guidelines for when a piping system must have a "formal" analysis. Inservices temperature and pressure cycling would also be a factor. It would also be useful to weigh the implications of the consequence of failure against the likelihood of failure in making these decisions (see B31.3, Appendices F and G). So, when should you do structural analysis (piping flexibility and stress analysis) of any particular piping system? Are you familiar with the B31.3 concept of various fluid services? The fluid service (see B31.3, Appendix M and paragraph 300.2) of the piping system would be one of the variables (the "except for"s that you would want to address in your general dimension-temperature related guideline. Even if you do not intend to do pipe stress analysis in-house, it would be VERY helpful to go to a Caesar II seminar just so that you would be competent in reviewing the formal analyses that are done by outside consultants.
CAESAR IV STEAM INSTALL CUSTOM SERNARIOS CODE
If you have been charged by your company to develop a sort of corporate piping design (and fabrication, erection, examination, testing and repair (fitness for continued service would be included) standard it would not be unreasonable to ask to be sent to a professional seminar on the B31.3 Code (Mr. There can be some variations on that some companies specify the B31.1 Code be used for the piping in the steam-water loops of boilerhouses. I assume that you have looked at the scope paragraphs in the Piping Codes and you have decided that B31.3 is the appropriate Code for your company's systems. The B31.3 Code assigns most of the responsibility for design (including analysis) to the owner. However, the Piping Codes do not give you much in the way of design direction - that is intentional as it is not the job of the Codes to guide design. I do not think the Guide Books by Glynn Woods and Chuck Becht are very vague - I think they are really rather explicit. ALSO, you have apparently done some research via looking up previous applicable threads - THANK YOU!!! You will also get some replies from folks who are members of various Piping and Pressure Vessel Code Committees. I think that you will get many replies as this board is frequented by many of us who are primarily pressure technology (including piping) engineers. RE: Piping Stress Analysis Sid7 (Mechanical) 24 Jan 08 12:10 I'm assuming for all this that ASME B31.3 is the main guideline to consider regarding Stress Analysis for Process Piping. I would like to know how those working at it proceed and if to develop our own properitary procedures/software is feasible. If it really is a bad idea, its best to find out at this early stage.įrom reading the guides, a lot of it seems pretty vague, or at least up to the designers dicretion. I would like to get some other opinions on this. I've spoken to my former mechanical engineering lecturer who thinks developing it from the ground up is a bad idea (i.e. So what I'm really looking for is somebody that works at this day to day, to give some pointers. We can characterise out piping networks quite easily, in terms of fittings, equipments dimensions, operating conditions etc. Instead they want to establish either a guideline or program that will cover the stress analysis. I know that Caesar, Autopipe and others are used, but for various reasons they don't want to go this route. I've assembled numerous guides (including the CASTI guidebook to ASME B31.3 & Process Piping the Complete Guide by Charles Becht). I've taken it upon myself to research this. It is now desired to do this analysis in-house. Before issuing drawings we send selected lines out for Stress Analysis (our somewhat simplified criteria for Stress Analysis is D>2", dT>100 Deg C). Hello, first time poster with a query regarding piping stress analysis.Īt the moment I work in plant design Process Engineer.