BW Reducer Weight Calculator


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.

BW Reducer Length Calculation

BW Reducer Length Calculation

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

    \[W = 1.3232 t (OD_1+OD_2-2t)L*10^{-5}\]

    \[L = \sqrt{H^2+\frac{(OD_1-OD_2)}{4}^2}\]

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
Smaller Size
Wall Thickness

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