How to Calculate Elbow Weights

http://www.bing.com/search?q=weight+of+pipe+fittings&form=QBRE&filt=all&qs=n

If you do not feel like exploring the web, proceed as follows. Get yourself a laboratory glass beaker with volumetric gradings, preferably in cc (cubic centimeters.) They are very common. Pour water into beaker up to a certain mark of your choosing. Drop in your steel elbow. See the difference in water level. The weight of the displaced water multiplied by 7.8 is the weight of your elbow. Voila... piece'o cake. Another way is to weigh it on a scale. Now if you really want to calculate it, just for the fun of it, you better begin by studying advanced geometry.

Skip all that nonsense. Instead, buy a scale and simply weigh whatever you want. Or get a catalog, many of which are available on line, and just look it up.

You can use geometry and/or calculus to compute the weight of elbows and flanges, but tees are pretty complicated, so it is better to get manufacturers' data.