Standard Test Method for Evaluating the Ignition Sensitivity and Fault Tolerance of Oxygen Pressure Regulators Used for Medical and Emergency Applications

Importancia y uso:

4.1 This test method comprises two phases and is used to evaluate the ignition sensitivity and fault tolerance of oxygen pressure regulators used for medical and emergency applications.

4.2 Phase 1: Oxygen Pressure Shock Test—The objective of this test phase is to determine whether the heat or temperature from oxygen pressure shocks will result in burnout or visible heat damage to the internal parts of the pressure regulator.

4.2.1 The criteria for a valid test are specified in the resistance to ignition tests in ISO 10524–1 for oxygen pressure regulators and ISO 10524–3 for oxygen VIPRs.

4.2.2 The pass/fail criteria for a pressure regulator are specified in the resistance to ignition tests in ISO 10524–1 for oxygen pressure regulators and ISO 10524–3 for oxygen VIPRs.

4.3 Phase 2: Promoted Ignition Test—

4.3.1 Oxygen Pressure Regulator—The objective of this test phase is to determine if an ignition event upstream of the pressure regulator inlet filter will result in sustained combustion and burnout of the pressure regulator.

4.3.1.1 The criterion for a valid test is either, (1) failure of the pressure regulator, as defined in 4.3.1.2, or (2) if the pressure regulator does not fail, consumption of at least 90 % of the ignition pill as determined by visual inspection or mass determination.

4.3.1.2 Failure of the pressure regulator is defined as the breach of the pressurized regulator component (burnout), which may include the CGA 870 seal ring, and ejection of molten or burning metal or any parts, including the gauge, from the pressure regulator. See Appendix X6 Testing Pressure Regulators and VIPRs with Gauges. However, momentary (less than 1 s) ejection of flame through normal vent paths, with sparks that look similar to those from metal applied to a grinding wheel, is acceptable and does not constitute a failure.

4.3.2 Oxygen VIPR—The objective of this test is to determine if an ignition event upstream of the shut-off valve or within the shut-off valve will result in sustained combustion and burnout of the VIPR, while the VIPR is flowing oxygen in the patient-use direction.

4.3.2.1 The criterion for a valid test is either, (1) failure of the VIPR as defined in 4.3.2.2, or (2) if the VIPR does not fail, consumption of at least 90 % of the ignition pill as determined by visual inspection or mass determination. Although the intent and desired result is to provide sufficient energy to ignite the shut-off valve seat, ignition of the shut-off valve seat is not required for a valid test. See Rationale in Appendix X7.

4.3.2.2 Failure of the VIPR is defined as the breach of the pressurized VIPR component (burnout) and ejection of molten or burning metal or any parts, including the gauge, from the VIPR. See Appendix X6 Testing Pressure Regulators and VIPRs with Gauges. However, momentary (less than 1 s) ejection of flame through normal vent paths, with sparks that look similar to those from metal applied to a grinding wheel, is acceptable and does not constitute a failure.

4.3.3 There is no requirement that the oxygen pressure regulator or oxygen VIPR be functional after being subjected to the promoted ignition test.

Note 4: The criterion for both the pressure regulator and VIPR Phase 2 tests does not include evaluation of external hardware (such as plastic guards and bags) that could be subjected to a momentary ejection of flame through normal vent paths.

Subcomité:

G04.01

Referida por:

G0128_G0128M-15R23, G0088-21, G0074-13R21

Volúmen:

14.04

Número ICS:

11.040.10 (Anaesthetic, respiratory and reanimation equipment)

Palabras clave:

fault tolerance; forced ignition; ignition; ignition sensitivity; impact test; medical oxygen pressure regulator; oxygen pressure shock test; oxygen regulator; promoted ignition; valve integrated pressure regulator; VIPR;