[sattar123]

Hello all,

I want to know about the procedure of hydrotest conducted for chilled water piping?

[speedball1]

hello all,

i want to know about the procedure of hydrotest conducted for chilled water piping?

If you're asking about how we test water pipes after we install them we can do it in one of two ways.
1) we pressure up a closed system and check the joints for air leaks ** or**
2) We pressure the lines with water and check the joints for leaks that way.
This works for hot, cold or chilled water. Good luck, Tom

[hvac1000]

From the book.

1. Use ambient temperature water as the testing medium, except where there is a risk of damage due to freezing or if steel piping is exposed to air for more than one week before the water treatment is implemented.
2. Subject piping system to a hydrostatic test pressure of 1.5 times the design pressure. The test pressure shall not exceed the maximum pressure for any vessel, pump, valve, or other component in the system under test. Check to verify that the stress due to pressure at the bottom of vertical runs does not exceed either 90% of specified minimum yield strength, or 1.7 times the "SE" value in Appendix A of ASME B31.9, Code For Pressure Piping, Building Services Piping.
3. After the hydrostatic test pressure has been applied for at least two hours, examine piping, joints, and connections for leakage. Eliminate leaks by tightening, repairing, or replacing components as appropriate, and repeat hydrostatic test until there are no leaks and pressure holds for a period of two hours. Contractor for signature by Owner. Coordinate with Owner for witnessing the test and to complete a test report to be signed by the owner's representative.