Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p33
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 94271–98593

average                                        greater than 600 oC
Maximum temperature  1-minute rolling average                                             less than 900 oC     3-10 Minutes              Not specified
Action                                                                                                                                   Main Burner Ignited at 10 minutes
                     Increase temperature
Minimum Temperature                                                                                                                      Not specified
                     1-minute rolling average                                          greater than 600 oC
Maximum temperature  1-minute rolling average                                              less than 1,100 oC  10-11 Minutes             Less than 1,100 oC
Action               Increase temperature and stabilize fire for start of engulfing fire exposure
                                                                                                                                         Increase temperature and stabilize fire for start of engulfing fire exposure
                     1-minute rolling average
Minimum temperature  greater than 600 oC                                                                                                 Greater than 300 oC
                     1 minute rolling average
Maximum temperature  less than 1,100 oC                                                                        11-12 Minutes             Less than 1,100 oC
Action               Engulfing fire exposure continues                                                                                   Engulfing fire exposure continues

Minimum temperature  1-minute rolling average                                                                                            1-minute rolling average
                     greater than 800 oC                                                                                                 Greater than 800 oC
Maximum temperature  1 minute rolling average                                                                                            1-minute rolling average
                     less than 1,100 oC                                                                        12 Minutes - end of test  less than 1,100 oC

              (d) Documenting results of the fire test
              The arrangement of the fire is recorded in sufficient detail to ensure the rate of heat input to the test article is reproducible. The results include the elapsed time from ignition of the fire to the start of venting through the TPRD(s), and the maximum pressure and time of evacuation until a pressure of less than 1 MPa is reached. Thermocouple temperatures and container pressure are recorded at intervals of every 10 sec or less during the test. Any failure to maintain specified minimum temperature requirements based on the 1-minute rolling averages invalidates the test result. Any failure to maintain specified maximum temperature requirements based on the 1-minute rolling averages invalidates the test result only if the test article failed during the test.
         5.2. Engulfing fire test:
         The test unit is the compressed hydrogen storage system. The storage system is filled with compressed hydrogen gas at 100 per cent NWP (+2/-0 MPa). The container is positioned horizontally with the container bottom approximately 100 mm above the fire source. Metallic shielding is used to prevent direct flame impingement on container valves, fittings, and/or pressure relief devices. The metallic shielding is not in direct contact with the specified fire protection system (pressure relief devices or container valve).
         A uniform fire source of 1.65 m length provides direct flame impingement on the container surface across its entire diameter. The test shall continue until the container fully vents (until the container pressure falls below 0.7 MPa). Any failure or inconsistency of the fire source during a test shall invalidate the result.
         Flame temperatures shall be monitored by at least three thermocouples suspended in the flame approximately 25 mm below the bottom of the container. Thermocouples may be attached to steel cubes up to 25