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10 Pipe Flow Expert Example Systems
Figure 4 Common 04 - Tee Fittings
Tee fittings are a special case where the flow rate through the tee will be different for each flow path, therefore two fittings should be used.
One fitting is added on each flow path to model the pressure loss for the tee. The correct flow rates along the various paths will then be applied to the appropriate 'Through Tee' or 'Branch Tee' fitting coefficients when calculating the fitting pressure losses.
Pipe entrance fittings have been purposely omitted for clarity.
There are four different situations where a Tee fitting may occur in a system, which are modelled as follows:
Case A: Diverting Tee (one branch line)
'Through Tee' fitting added to the main pipe leaving the tee.
'Branch Tee' fitting added to branch line pipe leaving the tee.
Case B: Converging Tee (two branch lines)
'Branch Tee' fitting added to a pipe entering the tee.
'Branch Tee' fitting added to a pipe entering the tee.
Case C: Diverting Tee (two branch lines)
'Branch Tee' fitting added to a pipe leaving the tee.
'Branch Tee' fitting added to a pipe leaving the tee.
Case D: Converging Tee (one branch line)
'Through Tee' fitting added to the main pipe entering the tee.
'Branch Tee' fitting added to the branch line entering the tee
UN-EQUAL PIPE SIZES:
Where the pipes sizes that connect to the tee are not equal, the fitting sizes used should match to the nominal pipe sizes.