Use the formula above to determine the width of each of the 4 required heel miters on an short-radius elbow on 4" pipe with an insulation OD of 8".

a. 1.57

b. 3.14

c. 3.52

d. 6.28






b. 3.14

{[(2 x 4) + 8] x 3.14} ÷ (4 x 4) =
[(8 + 8) x 3.14] ÷ 16 =
(16 x 3.14) ÷ 16 = 3.14

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