AS 2902-2005 Medical gas systems - Low pressure flexible hose assemblies
Standards Australia
Supersedes: AS 2902-1986 Medical gas systems - Low pressure flexible hose assemblies
Draft Designation: DR 02414Reconfirmed by: AS 2902-2005 Rec:2016 Medical gas systems - Low pressure flexible hose assemblies
The objective of this Standard is to ensure gas specificity and to prevent cross-connection between systems conveying different gases. In essence, low-pressure flexible hose assemblies are the extension of the pipeline to the device being used for patient care.
This Standard differs from ISO 5359:2000, Low pressure hose assemblies for use with medical gases, in that the most common connections specified for the hoses are those of the Australian Sleeve Index System (SIS) and not DISS or NIST. The non-interchangeable connection specified for flexible hose assemblies for less common gases is the NIST fitting as specified in ISO 5359:2000.
The Standard differentiates the pressure requirements for hoses for positive pressure for services up to 460 kPa from those for surgical tool applications for services up to 1400 kPa.
Special care needs to be taken in the repair of low-pressure flexible hose assemblies as a serious patient hazard exists if uninformed repairs are allowed.
Previous editions of the Standard have permitted connecting systems other than SIS design, e.g. quick connectors. For safety reasons, such connectors are no longer acceptable in this Standard, and facilities using these connectors should upgrade to SIS connectors by 2009. Connections for low-pressure flexible hose that do not presently comply with the requirement of this Standard should do so also by 2009.
Specifications for both parts of the SIS are given in this Standard and in AS 2896, Medical gas systems—Installation and testing of non-flammable medical gas pipeline systems.
The principal differences between this edition and the 1986 edition are as follows:
(a) Flexible hoses within fixed secondary equipment are excluded from this edition.
(b) A requirement for oxygen compatibility has been included.
(c) Flow resistance and resistance to collapse of the hose have been altered.
(d) The connection for less commonly used gases has been specified as the appropriate NIST connection in ISO 5359:2000.
(e) Nitrogen has been excluded from the specified gases in Table 1.
(f) Anti-static hose requirements have been excluded from this edition.
(g) New medical gas mixtures have been included.
(h) Permitted SIS end fittings and other end fittings have been specified.
The term ‘normative’ has been used in this Standard to define the application of the appendix to which it applies. A ‘normative’ appendix is an integral part of a Standard.
Reconfirmed: 2016-12-09 Originated as AS 2902-1986 Second edition 2005.Provision is made for the design, performance, identification and testing of low pressure flexible connecting assemblies used for conveying the medical gases at positive pressures up to 1400 kPa, and negative pressures not exceeding −95 kPa. Flexible hoses used in fixed secondary equipment are not dealt with in this Standard.
This Standard does not apply to manufacturer specific hoses provided by manufacturers of surgical tools as an integral part for use in the sterile operating area.
Nitric oxide/nitrogen mixtures are not included because special designs of the supply may be required.
Contents:
1: Scope
2: Application
3: Referenced Documents
4: Definitions
5: Hose
6: Connectors And Couplers
7: Hose Assemblies
8: Marking
Appendix A: Method For Determination Of Resistance To Occlusion
Appendix B: Sleeve Index System (SIS)
Medical Gas Systems.
Australian Chamber of Commerce and Industry; Australian Industry Group; Australian Society of Anaesthetists; Australian and New Zealand College of Anaesthetists; Department of Health Western Australia.; Engineers Australia; Master Plumbers and Mechanical Contractors Association of New South Wales; Ministry of Economic Development, New Zealand.
