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Thank you very much for your reply.

I have 2 very fundamental questions about the calculation of bolt length based on ASME B16.5 1. For the specified bolt lenth, it is said that"which is calculated bolt lenth rounded off to the nearest 5-mm increment". Is this means that if the calculated length is 46.1, it will be rounded to 45...

Thank you very much for you reply. Actually, the reason for this one is that we are trying to establish a standard database for piping components. I wanted that for vendors, what is the common practice for this kind of situation. Thanks anyway.

Thanks for your reply. Can you be more specific about mfr's data bonny forge? I looked up the homepage of Bonny forge and did not find relevant information.

In our project, a coulping with NPT/SW connection is used. In B16.11, dimension for threaded or SW connection on both ends is defined. However, for the dimension of NPT/SW type coupling, how to define the face to face dimension? Thanks.

Thanks to both of you. I am sorry but I am still a little confusing. Actually, we are making Catalogs for Valves and other components.From the sentence"Solid Wedge, Double Disc, and Conduit, Long pattern A and B", is it literally meaning that all Solid Wedge, Double Disc, and Conduit type of...

I am getting confused with the short and long pattern of Gate valves listed in B16.10 Table 4. Hope some one can help. In Table 4,it is written"Solid Wedge, Double Disc, and Conduit, Long pattern A and B" is this meaning that long pattern gate valves contains Solid Wedge, Double Disc, and...