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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”
- Acceptance Criteria
- Length of Dead-Leg shall not be greater than 1.5 times branch pipe diameter in length.
