Thinking about which rulebook really decides how your hospital’s medical gas system gets built, tested, and signed off? Here is the plain answer, right at the top. In India, NABH FMS.6 is the accreditation rule that makes a medical gas pipeline system a must-have, but it does not draw a single pipe for you.
It hands that job to IS/ISO 7396-1, the Indian version of the ISO 7396-1 medical gas pipeline standard, which carries all the real engineering. HTM 02-01 sits next to both as a British design guide many Indian projects still like to follow. So one gives the technical detail, one checks it at your audit, and one shapes the design.
This matters, because the World Health Organization notes that fewer than half of all health facilities have uninterrupted access to medical oxygen. Getting the standard right keeps your hospital on the safe side of that line, and Praun Metal builds to all three.
The Short Answer on Which Standard Governs Your MGPS
None of the three works on its own. Picture building a house. NABH FMS.6 is the inspector who says you must have safe gas lines. IS/ISO 7396-1 is the code that names the pipe, the pressure, and the test. HTM 02-01 is the thick foreign handbook your engineer keeps for extra help. Here is how the three compare.
| Standard | What it is | Its job in your hospital | Who checks it |
| IS/ISO 7396-1 | Indian and international technical standard for MGPS | Design, installation, testing, and commissioning of the pipeline | BIS-aligned consultant and installer |
| NABH FMS.6 | Accreditation clause under Facility Management | Makes the system mandatory and audited | NABH assessors |
| HTM 02-01 | UK design memorandum | Optional guide for layout, sizing, and validation | Your project team, by choice |
What an MGPS Is and Why the Standard Matters
A medical gas pipeline system is a fixed copper network that carries life-supporting gases from one central source to every bed, operation theatre, and ICU point. It replaces the risky habit of rolling heavy cylinders room to room. Built to standard, a nurse plugs into a wall outlet and the right gas flows at the right pressure.
A properly built system carries several gases, each with its own job:
- Oxygen O2 keeps patients breathing and also runs ventilators and anaesthesia machines.
- Nitrous oxide N2O mixes with oxygen for anaesthesia in operation theatres.
- Medical air at 4 bar supports breathing, while surgical air at 7 bar drives powered surgical tools.
- Medical vacuum is the suction line that clears fluids and feeds the anaesthetic gas scavenging system.
ISO 7396-1, the Technical Backbone
The ISO 7396-1 medical gas pipeline standard is where all the real numbers live. It sets the rules for design, installation, function, testing, documentation, and commissioning of every medical gas and vacuum line. It also insists on non-interchangeability, which simply means an oxygen outlet must physically refuse a nitrous oxide probe. That one rule alone has saved lives.
In India this is adopted as IS/ISO 7396-1 by the Bureau of Indian Standards. So your central oxygen supply system and every branch off it must hold correct pressure at each section. When a hospital says its hospital gas pipeline systems in Kolkata are built to code, this is the exact code they mean. You can read the full scope of ISO 7396-1:2016 on the ISO site, and Praun Metal engineers every line to this base.
NABH FMS.6, the Accreditation Rulebook
NABH FMS.6 will never tell you the dew point of medical air or the diameter of a copper line. It sits inside Chapter 8, Facility Management and Safety, and asks a different question: do you run a safe, well-recorded programme for medical gases, vacuum, and compressed air? Assessors check each objective element, so the paperwork matters as much as the pipe.
Under FMS.6, your hospital must show a few clear things, and each one protects a patient:
- Written guidance that covers how you buy, handle, store, distribute, and refill medical gases.
- Backup sources for oxygen, vacuum, and air that are ready the moment the main source fails.
- Recorded testing that proves those backup sources actually switch over and work.
- A written plan for inspection, testing, and maintenance of the whole piped installation.
- Trained staff who know exactly what to do the second an alarm starts sounding.
A first-class pipeline still fails the audit if the logbook is empty. You can see the official Accreditation Programme for hospitals, and our guide to NABH standards for MGPS breaks down every clause. Praun Metal records each FMS.6 element as the system is built, so nothing is missing on assessment day.
HTM 02-01, the British Design Reference
HTM 02-01 is a very detailed UK memorandum that spells out design, installation, validation, and day-to-day management. Indian consultants reach for it because it reads like a clear, step-by-step manual. Its guidance on the HTM 02-01 medical gas pipeline system layout and testing often shapes premium hospital projects here, even though it holds no legal power in India.
The honest way to use it is as a design companion, never as a stand-in for IS/ISO 7396-1. Where they disagree, a well-planned HTM 02-01 medical gas pipeline system still has to pass Indian accreditation on IS/ISO 7396-1 terms, so the Indian standard always wins the tie.
Side by Side: How the Standards Actually Differ
The point most articles skip is how each standard handles backup and air quality. This is the real line that separates a compliant MGPS system from one that only looks finished on paper.
| Design point | ISO 7396-1 | NFPA 99 | HTM 02-01 |
| Gas source setup | Three sources, two as backup | Two or three oxygen sources | Three or four sources, two as backup |
| Maintenance treated as | Single point of failure, full backup | Reduced capacity is accepted | Single point of failure, full backup |
| Medical air moisture | Under 67 ppm(v) dew point control | Continuous dew point and CO monitoring | Under 67 ppm(v) dew point control |
| Vacuum design flow | About 25 lpm per terminal | About 85 lpm per terminal | About 40 lpm per terminal |
Read simply, ISO 7396-1 and HTM 02-01 push harder for always-on backup, while NFPA 99 allows lower capacity during service. For an NABH-accredited hospital, that backup-first reading is safer, and the one Praun Metal designs into every plant room.
Which Standards Should a Kolkata Hospital Follow?
For a hospital here, the answer is simple. Meet IS/ISO 7396-1 as your engineering base, satisfy NABH FMS.6 for accreditation, and borrow HTM 02-01 detail wherever it sharpens the design. That blend is exactly what the current medical gas pipeline system standards in Kolkata reward when the assessor arrives.
Are you searching for medical gas installers near me in Kolkata who can prove all this on paper? Every mgps in hospital in Kolkata is only as strong as the certificates, pressure logs, and purity reports behind it. As a Kolkata-based MGPS supplier in India, Praun Metal delivers each project with the full test file ready before it is asked for. This is why the right medical gas pipeline system standards in Kolkata belong in your tender from day one.
Components That Must Meet the Standard
A standard is met one fitting at a time, and each part carries its own certificate. Praun Metal manufactures every component below to the same specification:
- The oxygen manifold system switches banks automatically, so gas never drops when one cylinder set runs empty.
- A hospital gas alarm system shows live pressure and warns your staff the instant something slips out of range.
- Each zone valve box lets you shut off one ward for repair without closing gas to the entire hospital.
- Medical-grade, deoxidised, non-arsenic copper pipeline resists corrosion and keeps the gas clean all the way to the bed.
- A modern bed head panel brings the outlets, sockets, and lights together within easy reach of the nurse.
You can browse our MGPS installation services to match each item to your own drawing. Praun Metal also handles the full medical gas pipeline installation, from the manifold room to the last ward outlet.
Where Hospitals Quietly Get It Wrong
Most compliance failures are quiet, not dramatic. A cheap contractor slips in industrial copper instead of medical grade, and gas purity quietly drops. Another skips the 24-hour pressure-hold test, so a slow leak hides in the wall until an ICU alarm wakes everyone at 2 a.m.
The other silent gap is paperwork. A perfect hospital oxygen manifold system in Kolkata can still fail FMS.6 because nobody logged the monthly alarm test. Praun Metal closes both gaps by testing to IS/ISO 7396-1 and handing over the exact records that turn good pipework into a truly compliant MGPS system, which is precisely what NABH FMS.6 asks to see.
Build It Right the First Time, Not at the Next Audit
Choosing between these three standards is the wrong question, because a safe Indian hospital honours all of them together. Lean on IS/ISO 7396-1 for the engineering, use NABH FMS.6 to prove the system is safe and documented, and let HTM 02-01 refine the finer design points. Skip any one of them and you risk patient safety, a failed accreditation, or a costly rebuild.
Planning a new build, an upgrade, or even a medical gas pipeline system in Mumbai or a medical gas pipeline system in Hyderabad? Let Praun Metal handle the design, supply, installation, and the full compliance file in one place. Reach the Praun Metal team through our contact desk for a standards-ready plan before you break ground.
Frequently Asked Questions
It is adopted as IS/ISO 7396-1 by the Bureau of Indian Standards and is the accepted technical benchmark. NABH-accredited hospitals are expected to build their MGPS to it, so in practice it is treated as compulsory.
NABH FMS.6 asks whether your gas programme is safe, backed up, and properly recorded. ISO 7396-1 defines how the pipeline itself is designed, installed, and tested. One enforces the safety, the other builds the system.
HTM 02-01 is a strong design guide, but it is a UK memorandum, not an Indian requirement. Follow IS/ISO 7396-1 as your base and use HTM 02-01 only to add design detail where it helps.
The installer runs pressure, leak, and purity tests to IS/ISO 7396-1, then hands over records that NABH assessors verify at accreditation. An installer like Praun Metal who supplies the full file keeps it smooth.
Alarms, pressures, and backup sources should be checked on a fixed, recorded schedule, with a written maintenance plan as FMS.6 requires. Most hospitals run monthly alarm checks plus periodic purity and pressure tests, all logged.