Weight of Fittings

Hello
Is there an Standard where you can find the weights of the different pipe fittings (ASME B16.1, B16.5, B16.9, B16.11, etc) ? Because inside this ones there isn't. If there isn't a Standard how can I get the weights? Thank you for the help.

Actually that is not completely true. Fittings and components made from materials complying to a specific material standard and to a specific fitting/component standard will all have weights which fall within the allowable range of the standards. The reason a standard does not provide a specific weight for a fitting is two fold -
1. The fitting/component standard can rely on the material standards to provide the tolerance for the production of the pipiing material, while it concentrates on the physical characteristics and their tolerances. This means the standard can be used throughout a range of materials (i.e. low carbon steels)
2. The standard can control the range of the fitting/component weight through the tolerances on the part. Using the average dimensional size for a part to determine the volume and multipling by the average weight per volume unit of the material will get you the average weight of a fitting/component made to that material and fitting/component standard - which is where those tables you are talking about came from.

The manufacturer's production weights vary from this average within the limits of the standard. Their QA/QC program will provide a different (or possibly the same) average production weight value based on how close their production methods are maintained. The closer they hold the values to the midpoint of the standard, the closer they approximate the average weight.

Throughout the process, when they exceed the high or low tolerance values, they are out of standard and the fitting/component no longer meets the specified standards.

So although we are both pointing to using the tables of average values, our answers differ on why.