To calculate the mass of round pipes , the formula is used: m = Pi * ro * S * (D - S) * L
The mass of rectangular and square pipes is calculated according to an interpolation formula, while the nodal points are the masses of pipes according to GOST 8645-68 \"Rectangular steel pipes\" and GOST 8639-82 \"Square steel pipes\". Thus, the masses of pipes with standard dimensions exactly correspond to GOST. For intermediate sizes (not according to GOST), the calculation is made according to the formula from the book: Rozov N.V. \"Handbook. The mass of one meter of pipes\". M.: Metallurgy, 1966.:\n The latest version of the app Pipe Calculator download for android.