Dead Leg Verification Procedure for Purified water storage & Distribution System
Objective : To Check that the dead-leg in Sampling lines/ Instrument Connection are not greater than 1.5 times pipe diameters in length. Scope :Dead Leg Verification for Purified water storage & Distribution System Procedure :
Collect the As Built Isometric Drawing of the PW Distribution System.
Identify the dead legs in the sampling line and allocate the ID numbering.
Now note the diameter of each dead leg branch pipeline.
Measure the length of dead leg pipe from inner surface of main line to end of branch line.
Now calculate the length of dead leg by multiplying by 1.5 with diameter of branch line.
Repeat above point for each segment of the pipeline and note the data in “Test Data Sheet”
Length of Dead-Leg shall not be greater than 1.5 times branch pipe diameter in length.
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