Readiness check

Is your medical gas piping crew ready to install, braze, and certify?

Medical gas piping carries oxygen, nitrous oxide, nitrogen, medical air, and vacuum straight to a patient, so a contaminated line, a crossed connection, or a joint scaled inside is not a callback, it can kill someone. NFPA 99 controls the materials, the brazing, the installer tests, and the independent verification, and the system stays locked out until an ASSE 6030 verifier confirms every outlet delivers the right gas. Skip a readiness item and the failure hides until the gas is flowing, which is the worst time to find it. Use this to check whether the crew has done the specific things that let the work be certified and used.

1. Do you have the installer certification and the brazer qualification in hand before the first joint?Installer holds a current ASSE 6010 cert and the brazer is qualified to ASME Section IX, with the records on file by nameSomeone holds ASSE 6010 but the brazer qualification is unconfirmed or the cert renewal date is uncheckedNo ASSE 6010 installer or no named ASME Section IX brazer; general plumbers are running the pipe

2. Is the tube the correct medical copper, cleaned for oxygen service and kept capped until each joint is brazed?Type L or K medical tube (commonly ASTM B819), cleaned and factory-capped, uncapped only at the joint being brazedCorrect medical tube on site, but lengths have been left open on the deck or caps pulled earlyStandard ACR or plumbing copper substituted because it looks the same

3. Are you brazing under a continuous oil-free dry nitrogen purge with the right filler and no flux?Steady oil-free dry nitrogen purge held until the joint is cool, BCuP filler on copper-to-copper joints, no fluxNitrogen purge used but flow is inconsistent or stopped before the joint coolsBrazing with no nitrogen purge, or using flux on a copper-to-copper joint

4. Have you cut a test coupon early to prove the purge is keeping the bore clean?Coupon cut open at the start of the job shows bright copper inside, confirming the purge before production brazingPlan to check a coupon but have not cut one yet, joints are going in on assumptionNo coupon cut; the inside of the joints has never been checked for scale

5. Is every line labeled with the gas name and flow direction as you build it, at the required intervals?Each line labeled per NFPA 99 and CGA C-9 at intervals, near valves and penetrations, with WAGD shown apart from vacuumSome lines labeled but spacing is inconsistent or labeling is being left for the end of the jobRuns are unlabeled during construction; gas is identified from memory or the drawing

6. Are you running the installer tests with oil-free dry nitrogen only, before anything is concealed?Initial pressure test, blow-down, and standing pressure test all done with oil-free dry nitrogen, joints exposed until they holdTests being run but one step is skipped, or joints are being buried before the standing test holdsTested with water or shop air, or no installer tests run before verification

7. Have you engaged an independent verifier who does not work for the installer?An ASSE 6030 verifier is engaged who is not the installer and does not work for them, confirmed in writingA verifier is lined up but the independence from the installing company is unconfirmedThe installer plans to certify their own work, or no third-party verifier is engaged

8. Will the cross-connection test cover every outlet before any clinical use?Cross-connection test scoped to confirm every outlet delivers only its labeled gas, and the system stays locked out until it passesCross-connection test planned but scoped to a sample of outlets, not all of themNo cross-connection test planned, or the system may be put into service before verification is done