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ASTM G175-13

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

Automaticky přeložený název:

Standardní zkušební metoda pro hodnocení zapalování citlivosti a odolnost proti poruchám kyslíku tlaku regulačních používanými pro lékařské a použití v případě nouze

NORMA vydána dne 1.10.2013

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Dostupnost	SKLADEM
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Informace o normě:

Označení normy: ASTM G175-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.10.2013
Kód zboží: NS-57532
Počet stran: 21
Přibližná hmotnost: 63 g (0.14 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Kategorie - podobné normy:

Anesteziologická, respirační a resuscitační zařízení

Anotace textu normy ASTM G175-13 :

Keywords:
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, ICS Number Code 11.040.10 (Anaesthetic, respiratory and reanimation equipment)

Doplňující informace

Significance and Use

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 ISO 10524–1, Section 6.6 for oxygen pressure regulators and ISO 10524–3, Section 6.6 for oxygen VIPRs.

4.2.2 The pass/fail criteria for a pressure regulator are specified in ISO 10524–1, Section 6.6 for oxygen pressure regulators and ISO 10524–3, Section 6.6 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 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 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.

1.1 For the purpose of this standard, a pressure regulator, also called a pressure-reducing valve, is a device intended for medical or emergency purposes that is used to convert a medical or emergency gas pressure from a high, variable pressure to a lower, more constant working pressure [21 CFR 868.2700 (a)]. Some of these oxygen pressure regulators are a combination of a pressure regulator and cylinder valve. These devices are often referred to as valve integrated pressure regulators, or VIPRs.

1.2 This standard provides an evaluation tool for determining the ignition sensitivity and fault tolerance of oxygen pressure regulators and VIPRs used for medical and emergency applications. An ignition-sensitive pressure regulator or VIPR is defined as having a high probability of ignition as evaluated by rapid pressurization testing (Phase 1). A fault-tolerant pressure regulator or VIPR is defined as having a low consequence of ignition as evaluated by forced ignition testing (Phase 2).

1.3 This standard applies only to:

1.3.1 Oxygen pressure regulators used for medical and emergency applications that are designed and fitted with CGA 540 inlet connections, CGA 870 pin-index adapters (CGA V-1), or EN ISO 407 pin-index adapters.

1.3.2 Oxygen VIPRs used for medical and emergency applications that are designed to be permanently fitted to a medical gas cylinder.

1.4 This standard is a test standard not a design standard; This test standard is not intended as a substitute for traditional design requirements for oxygen cylinder valves, pressure regulators and VIPRs. A well-designed pressure regulator or VIPR should consider the practices and materials in standards such as Guides G63, G88, G94, and G128, Practice G93, CGA E-18, CGA E-7, ISO 15001, ISO 10524-1 and ISO 10524-3.

1.5 This standard is also intended to aid those responsible for purchasing or using oxygen pressure regulators and VIPRs used for medical and emergency applications by ensuring that selected pressure regulators are tolerant of the ignition mechanisms that are normally active in oxygen systems.

1.6 This standard does not purport to address the ignition sensitivity and fault tolerance of an oxygen regulator or VIPR caused by contamination during field maintenance or use. Pressure regulator and VIPR designers and manufacturers should provide design safeguards to minimize the potential for contamination or its consequences (see Guide G88).

1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

G63-15(2023)	Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
G88-21	Standard Guide for Designing Systems for Oxygen Service
G93-03e1	Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
G94-22	Standard Guide for Evaluating Metals for Oxygen Service
D4066-13(2019)	Standard Classification System for Nylon Injection and Extrusion Materials (PA)
D618-21	Standard Practice for Conditioning Plastics for Testing
Manual 36	Safe Use of Oxygen and Oxygen Systems
	Smith, S. R., and Stoltzfus, J. M., Preliminary Results of ASTM G175 Interlaboratory Studies, Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres: Tenth Volume, ASTM STP 1454, T. A. Steinberg, H. D. Beeson, and B. E. Newton, Eds., ASTM International, West Conshohocken, PA, 2003.
	Smith, S. R., and Stoltzfus, J. M., ASTM G175 Interlaboratory Study on Forced Ignition Testing, Journal of ASTM International, Vol. 3, No. 7, Paper ID JAI13542, pp. 314-318.
G128-02	Standard Guide for Control of Hazards and Risks in Oxygen Enriched Systems
D6779-23	Standard Classification System for and Basis of Specification for Polyamide Molding and Extrusion Materials (PA)