Leak test. A TPRD that has not undergone previous testing is tested at ambient, high and low temperatures without being subjected to other design qualification tests. The unit is held for one hour at each temperature and test pressure before testing. The three temperature test conditions are:
(a) Ambient temperature: condition the unit at 20 (±5) °C; test at 5 per cent NWP (+0/-2 MPa) and 150 per cent NWP (+2/-0 MPa);
(b) High temperature: condition the unit at 85 °C or higher; test at 5 per cent NWP (+0/-2 MPa) and 150 per cent NWP (+2/-0 MPa);
(c) Low temperature: condition the unit at -40 °C or lower; test at 5 per cent NWP (+0/-2 MPa) and 100 per cent NWP (+2/-0 MPa). Additional units undergo leak testing as specified in other tests in Annex 4, paragraph 1. with uninterrupted exposure at the temperature specified in those tests. At all specified test temperatures, the unit is conditioned for one minute by immersion in a temperature controlled fluid (or equivalent method). If no bubbles are observed for the specified time period, the sample passes the test. If bubbles are detected, the leak rate is measured by an appropriate method. The total hydrogen leak rate shall be less than 10 Nml/hr.
Leak test. One unit that has not undergone previous testing is tested at ambient, high and low temperatures without being subjected to other design qualification tests. The three temperature test conditions are:
(a) Ambient temperature: condition the unit at 20 (±5) °C; test at 5 per cent NWP (+0/-2 MPa) and 150 per cent NWP (+2/-0 MPa) ;
(b) High temperature: condition the unit at 85 °C or higher ; test at 5 per cent NWP (+0/-2 MPa) and 150 per cent NWP (+2/-0 MPa) ;
(c) Low temperature: condition the unit at -40 °C or lower; test at 5 per cent NWP (+0/-2 MPa) and 100 per cent NWP (+2/-0 MPa). Additional units undergo leak testing as specified in other tests in Annex 4, paragraph 2. with uninterrupted exposure at the temperatures specified in those tests. The outlet opening is plugged with the appropriate mating connection and pressurized hydrogen is applied to the inlet. At all specified test temperatures, the unit is conditioned for one minute by immersion in a temperature controlled fluid (or equivalent method). If no bubbles are observed for the specified time period, the sample passes the test. If bubbles are detected, the leak rate is measured by an appropriate method. The leak rate shall not exceed 10 Nml/hr of hydrogen gas.
Leak test. Type CNG-4 designs shall be leak tested using the following procedure (or an acceptable alternative);
(a) cylinders shall be thoroughly dried and pressurized to working pressure with dry air or nitrogen, and containing a detectable gas such as helium;
(b) any leakage measured at any point that exceeds 0.004 standard cm3/h shall be cause for rejection.
Leak test. Type CNG-4 designs shall be leak tested using the following procedure (or an acceptable alternative);
Leak test. For toilets not qualifying for replacement, a toilet dye tab will be placed in the tank for 15 minutes. If the water in the bowl shows the presence of dye coloring, the flapper is leaking and qualifies for replacement. INSTALLATION RHA will dispatch a qualified and licensed plumber to conduct the installation of toilets and flappers. Toilets and flappers will be installed in accordance with the Installation Standards for Water Conservation Measures. At all times the contractors will adhere to rigorous program guidelines for installation and site clean‐up while in the customer home. PROGRAM MANAGEMENT RHA will manage all aspects of the Water Coordination Program, including contractor recruitment and training, badging and payment. RHA will promptly resolve customer service issues. RHA will verify the quality of services through: • Customer Satisfaction calls: Quality assurance phone calls a minimum of 5 percent of all homes served. Customers will be asked about measure installation, site cleanup and satisfaction. The results will be compiled and included in quarterly reports.
Leak test. This test applies to one TPRD that has not undergone previous design qualification tests and additional units as specified in other tests in Annex 4, paragraph 1. The leak test is performed at ambient, high and low temperatures. The unit shall be thermally conditioned at each of the required test temperatures and held pressurized to ≥2 MPa for at least one hour to ensure thermal stability before testing. The TRPD is pressurized with leak test gas at the inlet. The test conditions are:
(a) Ambient temperature: condition the unit at ambient temperature; test at 2 ± 0.5 MPa and ≥ 125 per cent NWP;
(b) High temperature: condition the unit at ≥ 85 °C; test at 2 ± 0.5 MPa and ≥ 125 per cent NWP;
(c) Low temperature: condition the unit at ≤ -40 °C; test at 2 ± 0.5 MPa and ≥ 100 per cent NWP. Following conditioning at each of the specified test temperatures, the unit is observed for leakage while immersed in a temperature-controlled fluid (or equivalent method) for at least one minute at each of the test pressures listed above. If no bubbles are observed for the specified time period, the sample passes the test. If bubbles are detected, the leak rate is measured. The total hydrogen leak rate shall be less than 10 Nml/h.
Leak test. This test applies to one unit that has not undergone previous design qualification tests and additional units as specified in other tests in Annex4, paragraph 2. The leak test is performed at ambient, high and low temperatures. The unit shall be thermally conditioned at each of the required test temperatures and held pressurized to ≥ 2 MPa for at least one hour to ensure thermal stability before testing. The outlet opening is plugged with the appropriate mating connection and pressurized leak test gas is applied to the inlet. The required test conditions are:
(a) Ambient temperature: condition the unit at 20 ± 5 °C; test at 2 ± 0.5 MPa and ≥ 125 per cent NWP;
(b) High temperature: condition the unit at ≥ 85 °C; test at 2 ± 0.5 MPa and ≥ 125 per cent NWP;
(c) Low temperature: condition the unit at ≤ -40 °C; test at 2 ± 0.5 MPa and ≥ 100 per cent NWP. Following conditioning at each of the specified test temperatures, the unit is observed for leakage while immersed in a temperature-controlled fluid (or equivalent method) for at least one minute at each of the test pressures listed above. If no bubbles are observed for the specified time period, the sample passes the test. If bubbles are detected, the leak rate is measured by an appropriate method. The leak rate shall not exceed 10 Nml/h of hydrogen gas.
Leak test. (Also refer to cycle chart in Section 2 of this manual)
1. With the display showing the Main Menu, press the LEAK TEST button.
2. Connect absolute gauge to chamber. Keep ball valve closed at this time. Close door(s) if neces- sary.
Leak test. A TPRD that has not undergone previous testing is tested at ambient, high and low temperatures without being subjected to other design qualification tests. The unit is held for 1 hour at each temperature and test pressure before testing. The three temperature test conditions are:
a) Ambient temperature: condition the unit at 20 (±5) °C; test at 5% of NWP (+0/-2 MPa) and 150% of NWP (+2/-0 MPa);
b) High temperature: condition the unit at 85 °C or higher; test at 5% of NWP (+0/-2 MPa) and 150% of NWP (+2/-0 MPa);
c) Low temperature: condition the unit at -40°C or lower; test at 5% of NWP (+0/-2 MPa) and 100% of NWP (+2/-0 MPa). Additional units undergo leak testing as specified in other tests with uninterrupted exposure at the temperature specified in those tests. At all specified test temperatures, the unit is conditioned for 1 minute by immersion in a temperature controlled fluid (or equivalent method). If no bubbles are observed for the specified time period, the sample passes the test. If bubbles are detected, the leak rate is measured by an appropriate method. The total hydrogen leak rate shall be less than 10 Nml/hr.
Leak test. After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.
