HDPE Bend Radius Calculator

Inputs

View results
Actual pipe outside diameter, not nominal pipe size.
in
Minimum bend radius expressed as a multiple of outside diameter. Enter the project-specified or manufacturer value.
x OD
Direction change across the curved section.
°
Arc length available for the pipe to make the bend.
ft

Results

Default result
Edit inputs
Minimum bend radius(R_min)
9.375ft
Pass

pipe OD x radius multiplier

Also computed

Required curve length(L_req)Pass3.272ft

arc length needed for the desired deflection

Available deflection(A_avail)Pass24.45°

from available curve length / minimum radius

Deflection margin(A_margin)Pass4.446°

available curve length meets the entered deflection

Chord length(c)3.256ft

straight distance between arc endpoints

Forward advance(x)3.206ft

advance along the starting tangent for the desired bend

Lateral offset(y)0.5654ft

offset from the starting tangent at the arc end

HDPE bend radius previewHDPE bend-radius previewArc length = radius x deflection angledesired bend20 degradius multiplier25 x ODPreview is geometric only; final HDD or utility work needs manufacturer limits, pullback load, SDR, temperature, joints and owner specifications.
Method notes 4 notes
  • Minimum bend radius = pipe outside diameter x entered radius multiplier.
  • Required curve length = minimum bend radius x desired deflection angle in radians.
  • Available deflection angle = available curve length / minimum bend radius, converted to degrees.
  • This is a geometry screen only. Final HDD, utility and plumbing work still needs pipe manufacturer limits, SDR, temperature, pull load, joints, soil/friction conditions, fittings, code and owner specifications.

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