Medical gas pipeline systems: registering with MDA.

What MDA requires.

Under section 5(1) of Act 737 a medical device must be registered before it is imported, exported or placed on the market, and MDA treats a medical gas system as a medical device. MDA/GD/0057, Medical Gas System – Requirements for Registration (Second Edition, 9 February 2023), sets out how. A system can be registered as a complete system, by sub-system, or as individual devices. Almost every active element is Class C; the pipeline itself is Class B. That means a registered conformity assessment body (CAB) assesses it before the application reaches MDA, and the reference standard is MS 2675-1:2017.

MDA’s reason is stated plainly in the guidance: a medical gas system is an essential part of any healthcare facility, and its failure can contribute to patient morbidity or death. Design, manufacture and installation all have to meet the standards in the guidance.

What counts as a medical gas system

GD/0057 takes both definitions from MS 2675-1:2017:

• Medical gas: any gas or mixture of gases intended for administration to patients for anaesthetic, therapeutic, diagnostic or prophylactic purposes.
• Medical gas system: a complete system comprising a supply system, a monitoring and alarm system and a distribution system, with terminal units where medical gases and vacuum are needed.

The gas is not MDA’s. A cylinder containing medicinal gas is regulated by the Drug Control Authority, and ASEAN’s borderline list (MDA/GD/0063) treats medical gases with their primary containers as drugs. MDA regulates the equipment that stores, distributes, monitors and delivers them.

Three ways to register (clause 5.1)

A system assembled from several manufacturers’ equipment cannot be filed as one Category 1 system. Register it by sub-system or device by device.

The class of each element (Annex B)

Annex B is normative, so these are MDA’s classifications. GD/0057 gives two worked reasons: a device that channels compressed medical gases from source to patient, or vacuum from patient to source, falls under Rule 2; a pneumatic pressure source or vacuum is an active device that administers or removes energy and substances in a potentially hazardous way, so Rules 9 and 11 apply.

Where two or more rules apply, the highest class wins, and devices used together are classified separately (clause 5.2.2). MDA makes the final ruling on interpretation. The general method is on our classification page.

Technical documentation

• Essential principles. The establishment submits evidence of conformity with the essential principles of safety and performance, such as a documented risk analysis, test results, literature searches, labels and instructions for use, the design dossier and the list of standards. Annex D is an EPSP checklist; see our essential principles checklist page.
• Approvals from other authorities. For a device another authority regulates, its approval is submitted with the registration application. MDA’s example: DOSH approval for air receivers.
• CSDT. The manufacturer prepares the Common Submission Dossier Template under Appendix 2 of the Third Schedule of the Medical Device Regulations 2012, with a justification for any element that does not apply. All verification and validation testing of the individual devices in the system or sub-system is compiled and submitted with it.
• Declaration of Conformity and post-market surveillance. The manufacturer also needs a Declaration of Conformity and a post-market surveillance system covering complaints, distribution records, field corrective action, mandatory problem reporting and recall.

Standards (clause 5.5 and Annex C)

MS 2675-1:2017 is the standard GD/0057 names for demonstrating compliance; equivalent standards may be used. Annex C is informative and not exhaustive:

Conformity assessment and application

Class A devices, such as an empty cylinder, are exempt from conformity assessment and go straight to MDA. Class B, C and D devices are assessed by a registered CAB before the registration is submitted:

• Verification for devices already approved by a regulator or notified body MDA recognises (see the verification route).
• Full conformity assessment for locally made devices and devices from countries outside the recognised list (see full conformity assessment).

The application is then filed in MeDC@St with the configuration list. MDA issues a registration certificate with a unique registration number, which goes on the device labels as MDA/GD/0026 requires (see labelling). Changes after registration go through change notification. Whoever imports or supplies the system also needs an MDA establishment licence.

Installation, testing and maintenance

Registration covers the device; putting it into service is a separate duty. Section 43 of Act 737 requires devices used on third parties to be properly installed, tested, commissioned and maintained, and paragraph 28 of GDPMD requires documented procedures for it. GD/0057 lists MS 2675-2, the code of practice for operation and maintenance, among its horizontal standards. Our testing and commissioning page covers those obligations.

Points the guidance is specific about

• GD/0057 still cites the Medical Device (Exemption) Order 2016 and MDA Circular No. 2/2014 on recognised countries. Both have been replaced: the Class A exemption is now in paragraph 5 of the Exemption Order 2024 (P.U. (A) 78), and recognised regulators are set by MDA Circular Letter No. 2 of 2025.
• Pipe supports are excluded from the pipeline sub-system’s Class B listing.
• The cylinder’s class rises with what is fitted to it: empty A, with valve B, with an integrated pressure regulator C.
• Annex D’s checklist refers to a clinical evaluation guidance document that MDA says is still in development.