): Flow is unstable and changes between laminar and turbulent states. Turbulent Flow (
: Every elbow, tee, or valve adds "equivalent length" to the system, increasing the total pressure drop.
: To prevent erosion, excessive noise, or water hammer, velocities must be kept within specific ranges. For example, liquid in a centrifugal pump suction line should typically stay between 3 to 5 feet per second for smaller pipes. ): Flow is unstable and changes between laminar
Here’s a helpful, structured write-up to accompany a PDF. You can use this as a study guide, training handout, or section introduction.
: Find an "economical size" that balances the initial capital cost of the pipe against the long-term energy costs of pumping. For example, liquid in a centrifugal pump suction
): Fluid moves in parallel layers with minimal mixing. Viscous forces dominate. This is common in highly viscous fluids like heavy crude oil or polymers. Transitional Flow (
hm=K⋅(v22g)h sub m equals cap K center dot open paren the fraction with numerator v squared and denominator 2 g end-fraction close paren Alternatively, engineers use the Equivalent Length method ( Leqcap L sub e q end-sub : Find an "economical size" that balances the
ASME B31.3 is the most widely referenced piping code in the oil and gas and petrochemical sectors worldwide. It establishes mandatory requirements for the design, materials, fabrication, assembly, examination, inspection, and testing of piping systems in petroleum refineries, chemical plants, pharmaceutical facilities, and related process industries.