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Resistance and Fittings Equivalent Length in Hot Water Systems

Equivalent length of fittings like bends, returns, tees and valves in hot water heating systems - equivalent length in feet and meter

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The minor loss in a system component can be converted to the "equivalent length" of a pipe or tube that would give the same major head loss.

Equivalent lengths of fittings like

  • elbows - regular 90o, long radius 90o, regular 45o
  • tees - line flow and branch flow
  • return bends - regular and long radius
  • valves - globe, gate, angle and swing check
  • strainers

in hot water piping systems are indicated in the tables below.

Screw Fittings - equivalent length in feet

Equivalent length (in feet) of straight pipe for fittings like bends, returns, tees and valves. (Pipe size in inches)

Piping - Equivalent length of screwed fittings - feet

Screw Fittings - equivalent length in metre

Equivalent length (in metre) of straight pipe for fittings like bends, returns, tees and valves.

Piping - equivalent length of screwed fittings - meter

Flanged Fittings - equivalent length in feet

Equivalent length (in feet) of straight pipe for fittings like bends, returns, tees and valves.

Piping - equivalent length of flanged fittings - feet

Flanged Fittings - equivalent length in metre

Equivalent length (in metre) of straight pipe for fittings like bends, returns, tees and valves.

Piping - equivalent length of flanged fittings - meter

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  • en: piping pipes head loss resistanse fittings
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