pipe

// Pipe
// A tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances that can flow.

// Define constants
pipeTotalLength = 20
pipeLargeDiaLength = 1
pipeLargeDia = 1
pipeSmallDia = .75
thickness = 0.125
pipeTransitionAngle = 60
pipeTransitionLength = 0.5
pipeSmallDiaLength = pipeTotalLength-pipeTransitionLength- pipeLargeDiaLength

// Create the sketch to be revolved around the y-axis. Use the small diameter, large diameter, length, and thickness to define the sketch.
pipeSketch = startSketchOn('XY')
  |> startProfileAt([pipeSmallDia - (thickness / 2), 38], %)
  |> line([thickness, 0], %)
  |> line([0, -(pipeSmallDiaLength)], %)
  |> angledLineOfYLength({
    angle: -60,
    length: pipeTransitionLength,
  }, %)
  |> line([0, -pipeLargeDiaLength], %)
  |> xLine(-thickness, %)
  |> line([0, pipeLargeDiaLength], %)
  |> angledLineToX({
    angle: -pipeTransitionAngle+180,
    to: pipeSmallDia - thickness/2,
  }, %)
  |> close(%)

// Revolve the sketch to create the pipe
pipe = revolve({ axis: 'y' }, pipeSketch)