Pump Specific Speed Pump specific speed when running, calculates increases in unit of volume in a unit of time through a unit of head pressure. The characteristics of the suction side of the impeller determine the efficiency. where ππ β Pump Specific Speed π»1 β Head per Stage [ft] ππππ β Capacity at…
Centrifugal Pump – Affinity Laws A. Diameter Change Only: Impeller trimming (change) refers to the reduction of the impeller diameter, and thus a reduction of the circumferential speed at the impeller outlet of a centrifugal pump. The effect of this measure thus depends on the type of impeller. Single-vane and…
Required Pump Horsepower Brake horsepower is a function of capacity, total head, specific gravity of the fluid, efficiency and difference between suction and discharge pressures. The primary limitations include mechanical efficiency (ME), undersized suction line, less turns in the piping and velocity. Hydraulic/Water Horsepower: Brake Horsepower: π β Pump Capacity…
Pipeline Pumps (Liquid) Introduction The Pipeline Toolbox is home to many tools and calculators. The PLTB Userβs Guide presents information, guidelines, and procedures for use during design, and operations tasks for field or office applications. Liquid pipelines are used to transport liquids, such as crude and refined oil, from the…
Wave Speed in Pipeline Where: π β Wave Speed πΎπ Β β Adiabatic Bulk Modulus of fluid π β Density of fluid πΈ β Modulus of Elasticity for Steel Pipe (psi) π· β Pipe Diameter (in) π‘ β Pipe Wall Thickness (in) π β Poissonβs Ratio (0.30 for Steel) π β coefficient…
Adiabatic Bulk Modulus of Hydrocarbons The bulk modulus for a liquid is defined as the ratio of a change in pressure to the relative change in volume. Common uses for the bulk modulus include: Calculation of the speed of sound for liquids, which useful for applications where pressure waves are…
ASTM D 341 Viscosity – Temperature Relations For Hydrocarbons General Form: Loglogπ = π΄ β π΅ logπ …
API 2540 – Volume Correction Factor This procedure calculates the Volume Correction Factor (VCF) for correcting from the density at base conditions (60Β°F and 0 psig) to alternate temperature and pressure conditions. Step 1: Unless otherwise directed, check the input values to determine if they are in the range of…
API MPMS – Compressibility Factor For Hydrocarbons The purpose of this application is to correct hydrocarbon volumes metered under pressure to the corresponding volumes at the equilibrium pressure for the metered temperature based on API standard. This standard define procedure for determination of compressibility factors related to meter temperature and…
API 1117 – Movement of In-Service Pipeline Total Longitudinal StressThe total longitudinal stress in the pipe can be estimated with the following equation:ππΏ = ππΈ + ππ΅ + ππ Where:ππΏ = Total Longitudinal Stress in the Pipe [psi]ππΈ = Existing Longitudinal Stress in the Pipe [psi]ππ΅ = Longitudinal Stress in…