wth_d: Derive the wall thickness depending on the outside diameter of pipe
Description
Use GOST 30732
specifications to derive the value of the pipe wall thickness if only its
diameter is known for the pipe.
Usage
wth_d(x)
Arguments
x
outside diameter of pipe, [mm]. Type: assert_double.
Details
Utility should be used only in cases where the actual value
of the pipe wall thickness cannot be determined by any
other means. In many cases internal diameter may be used instead of outside
one without significant loss in precision. The wall thickness value is
derived only for the diameters mentioned in
Minenergo Order 325.
Unfortunately, the inverse function cannot be constructed in any reliable way
due to significant ambiguity.
References
GOST 30732.
Steel pipes and shaped products with foamed polyurethane thermal
insulation in protective sheath. Specifications.