Steam Piping Drip Legs

Properly draining steam pipes for condensate

steam pipes drip legs condensate

The 3D model above is made with sketchup.engineeringtoolbox.com

Condensate is generated in the steam pipes due to heat loss and due to energy required during system heat up. For the steam system to work properly it is important that the condensate is removed. 

Steam traps for draining should be located

  • on horizontal pipes - every 30 - 50 m (100 - 150 ft)
  • in front of pressure reducing valves to avoid damaging the equipment
  • in front of control valves to avoid damaging the equipment
  • in front of normally closed valves to avoid building up condensate that may damage the system when accelerated
  • at the bottom of vertical lines
  • at the end of the steam line

Recommended Drip Leg Dimensions

Main DiameterPocket DiameterPocket Depth
(mm)(in)(mm)(in)(mm)(in)
50 2 50 2 700 28
80 3 80 3 700 28
100 4 100 4 700 28
250 10 150 6 700 28
500 20 250 10 700 28

Example - Drip Leg Dimensions

The recommended drip leg dimension for a 80 mm (3 in) steam pipe is 80 mm (3 in). The pocket depth should be 700 mm (28 in).

Related Topics

  • Steam and Condensate - Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more

Related Documents

Tag Search

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close