CheCalc

Chemical engineering calculations to assist process, plant operation and maintenance engineers.

Pipe Fitting Losses

Pressure loss in a pipe due to fittings such as elbows, tees, valves, expanders and reducers based on 3K and 2K method.
Pipe
inch
inch
m
m
Fluid
lb/h
lb/ft³
cP

Result
90° Elbow
Qty90° ElbowK
Threaded, r/D=1 0.27
Threaded, Long Radius, r/D=1.5 0.27
Flanged, Welded, Bend, r/D=1 0.27
Flanged, Welded, Bend, r/D=2 0.27
Flanged, Welded, Bend, r/D=4 0.27
Flanged, Welded, Bend, r/D=6 0.27
Mitered, 1 Weld, 90° 0.27
Mitered, 2 Weld, 45° 0.27
Mitered, 3 Weld, 30° 0.27
Mitered, 4 Weld, 22.5° 0.27
Mitered, 5 Weld, 18° 0.27
45° Elbow
Qty45° ElbowK
Standard, r/D=1 0.27
Long Radius, r/D=1.5 0.27
Mitered, 1 Weld, 45° 0.27
Mitered, 2 Weld, 22.5° 0.27
180° Bend
Qty180° BendK
Threaded, r/D=1 0.27
Flanged/ Welded, r/D=1 0.27
Long Radius, r/D=1.5 0.27
Tees
QtyTeesK
Standard, Threaded, r/D=1 0.27
Long Radius, Threaded, r/D=1.5 0.27
Standard, Flanged/Welded, r/D=1 0.27
Stub-in Branch 0.27
Run Through Threaded, r/D=1 0.27
Run Through, Flanged/Welded, r/D=1 0.27
Run Through Stub in Branch 0.27
Valves
QtyValvesK
Angle Valve =45°, β=1 0.27
Angle Valve =90°, β=1 0.27
Globe Valve, β=1 0.27
Plug Valve, Branch Flow 0.27
Plug Valve, Straight Through 0.27
Plug Valve, 3-way, Flow Through 0.27
Gate Valve, β=1 0.27
Ball Valve, β=1 0.27
Butterfly Valve 0.27
Diaphragm Valve, Dam Type 0.27
Swing Check Valve 0.27
Lift Check Valve 0.27
Tilting Disk Check Valve 0.27
Reducer
inch
°
QtyReducerK
Square Reduction Square Reduction 0.27
Tapered Reduction Tapered Reduction 0.27
Rounded Pipe Reduction Rounded Pipe Reduction 0.27
Expander
inch
°
QtyExpanderK
Square Expansion Square Expansion 0.27
Tapered Expansion Tapered Expansion 0.27
Rounded Pipe Expansion Rounded Pipe Expansion 0.27
Orifice
inch
inch
QtyOrificeK
Thin Sharp Orifice Thin Sharp Orifice 0.27
Thick Orifice Thick Orifice 0.27
Pipe Entrances
QtyPipe EntrancesK
Flush/ Square Edged Flush Square Edged Pipe Entrances 0.27
Rounded Rounded Pipe Entrances
0.27
Inward Projecting Inward Projecting (Borda) 0.27
Chamfered Chamfered 0.27
Pipe Exits
QtyPipe ExitK
Pipe Exit 0.27