MIL-STD-1622B(SH)
(c)Clean as specified in 5.2 or 5.3, depending on application.
5.9.3 Hot water flush. Perform a hot water flush for particulate or seawater removal as follows:
5.9.3.1 Hot water flush for particulate removal. Flush with grade C water for general applications or grade B water for critical applications at a velocity of 3 ft/sec determined as specified in 5.6.7(b) maintaining an exit temperature of not less than 110oF for 30 minutes minimum. Recirculating
water through a 10 micrometer nominally rated filter will minimize the volume of flushing water used. If flushing through parallel piping, flow shall be isolated to ensure that each path is flushed with full flow for at least 10 minutes. At the completion of flushing, obtain a sample of the effluent from each branch and inspect as specified in 5.9.5.
5.9.3.2 Hot water flush for sea water removal. Flush with grade C
water for general applications or grade B water for critical applications at a velocity of 1 ft/sec maintaining an exit temperature of not less than 110oF
for 30 minutes minimum. If flushing through parallel piping, flow shall be isolated to ensure that each path is flushed with full flow for at least 10 minutes. At the completion of flushing, obtain a sample of the effluent from each branch and inspect as specified in 5.9.5.
5.9.4 Cold water flush. Perform a cold water flush for particulate or seawater removal as follows:
5.9.4.1 Cold water flush for particulate removal. Flush with grade C water for general applications or grade B water for critical applications at a velocity of not less than 3 ft/sec determined as specified in 5.6.7(b) maintaining a temperature of not less than 60oF for 1 hour minimum. Recirculating water through a 10 micrometer nominally rated filter will minimize the volume of flushing water used. If flushing through parallel piping, flow shall be isolated to ensure that each path is flushed with full flow for at least 30 minutes. At the completion of flushing, obtain a sample of the effluent from each branch and inspect as specified in 5.9.5.
5.9.4.2 Cold water flush for sea water removal. Use grade C water for general applications or grade B water for critical applications for the soak and flush. Soak the system at not less than 60oF for 12 hours minimum. Drain and refill the system. Flush at a velocity of not less than 1 ft/sec maintaining a temperature of not less than 60oF for 30 minutes minimum. If flushing through parallel piping, flow shall be isolated to ensure that each path is flushed with full flow for at least 10 minutes. At the completion of flushing, obtain a sample of the effluent from each branch and inspect as specified in 5.9.5.
5.9.5 Inspection. If flushing to remove particulate contamination, verify critical application cleanliness as specified in 5.14.3.1 or general application cleanliness as specified in 5.14.3.2. If flushing to remove seawater contamination, measure chlorides and conductivity and verify the sample meets grade C water requirements as specified in 4.1.1. If any of the analyses fail, repeat the flushing for durations as needed. Continue flushing until a sample of the effluent from each branch passes the analyses.
5.9.6 Drying and reinstalling components. Drying, if required by Table
VI, and reinstallation of components shall be accomplished as follows:
(a)Remove rinse water and dry the system with air or nitrogen until the dew point specified in Table VI is reached. Air or nitrogen preheaters, strip heaters, or vacuum pumps have been successfully
32
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business