Regarding the issue of standards
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Where can I find the ASME16.47 standard? Can standards like this be downloaded from the internet?
If you’re willing to spend a little money or some time, you can go to the Asmi website where there’s a wider range of options. Another option is to learn from RabbitTut and the China Mechanical CAD Forum; these are websites with a large number of standards. If none of them are available, one can only search slowly on Baidu.
http://www.asimi8.com/thread-74620-1-1.html
ASME 22 series standard collection: https://bbs.hcbbs.com/thread-2022650-1-1.html (Source: Haichuan Chemical Industry Forum)