inner_diameter(number, format: Meters, required): Inner diameter of pipe. Minimum: 0.
outer_diameter(number, format: Meters, required): Outer diameter of pipe. Minimum: 0.
shank_spacing(number, format: Meters, required): Spacing between up/down legs of u-tube pipe, as measured from nearest outer surfaces of each pipe (o<-- s -->o). Minimum: 0.
roughness(number, format: Meters, required): Surface roughness of pipe. Minimum: 0.