Approximate weight of a butt welding reducer can be calculated based on its two outside diameters, length and wall thickness. Please note that actual weight of a reducer from a particular manufacturer may vary depending on manufacturing process. Dimensional standards like ASME B16.9 do not provide weights of butt welding fittings.

Weight of a Butt Weld Reducer as per ASME B16.9 is calculated as per following formula  :

Where :

Where :

1. W = Weight in Kg
2. OD1 = Large Size Outside Diameter (mm)
3. OD2 = Smaller Size Outside Diameter (mm)
4. t = Wall Thickness (mm)
5. H = End to End Dimension (mm)

Larger Size	1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 5 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Smaller Size	1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 5 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Wall Thickness	mm Inch