Rules of Thumb
  1. Flanges and fittings are rated for 150, 300, 600, 900, 1,500 or 2,500 psig.
  2. Line velocties and pressure drops, with line diameter, D, given in in.; Liquid pump discharge (5 + D/3) ft/s, 2.0 psi/100 ft; liquid pump suction (1/3 + D/6) ft/s, 0.4 psi/100 ft; steam or gas 20D ft/s 0.5 psi/100 ft.
  3. Control valves require at least a 10 psi drop for good control.
  4. Screwed fittings are used only on sizes 1.5 inch; smaller, flanged or welded fittings are used otherwise.

H I N T S  A N D  R U L E S
Drying and Solids Conveyors for Particular Solids Cooling Towers Compressors and Vacuum Pumps Crushing and Grinding
Extraction, Liquid-Liquid Crystallatisation from Solution Filtration Heat Exchangers Mixing and Agitation
Particle Size Enlargement Piping Pumps Reactors Refrigeration
Particle Size Enlargement Size Seperation of Particles Utilities, Common Specifications Vessels (Storage Tanks) Pumps
C O N T A C T   G L Y D E