SLIDE 1 THE AUTHORITY IN PLUMBING SYSTEM DESIGN AND ENGINEERING
Medical Gas
What Should Engineers Know?
SLIDE 2 THE AUTHORITY IN PLUMBING SYSTEM DESIGN AND ENGINEERING
Course Description
- In this course we will discuss a variety of items that every
engineer should be aware of which will lead to the medical gas system being installed in such a manner that promotes patient well-being and safety. Utilizing industry “lessons learned” and code sections hopefully we can help eliminate some of the most common (and costly) mistakes. Additionally we will go over some of the differences between the upcoming 2018 edition of NFPA 99 compared to previous editions.
SLIDE 3 Learning Objectives
1. Why are medical gases important? 2. Pre-design (codes, standards, and AHJ’s) 3. Design coordination (common items) 4. Construction administration - and beyond 5. NFPA 99 2018 Update
SLIDE 4 Why Is This Important?
When not properly installed, medical gases can be dangerous.
SLIDE 5 Pre-Design: Codes, Standards, and…
NFPA 99 2012:
- Category 1 -“major injury or death” - ICU
- Category 2 -“minor injury” - Outpatient
- Category 3 -“discomfort” – Dental (?)
- Category 4 – N/A
SLIDE 6
Pre-Design: Codes, Standards, and…
SLIDE 7 Pre-Design: Codes, Standards, and…
Anesthesia
SLIDE 8
Pre-Design: Codes, Standards, and…
SLIDE 9
Pre-Design: Codes, Standards, and…
SLIDE 10
Pre-Design: Codes, Standards, and…
SLIDE 11 Pre-Design: Codes, Standards, and…
5.1.3.5.2 Permitted Location for Medical Gases 1) Direct respiration by patients 2) Clinical application of the gas to a patient, such as the use of an insufflator 3) Medical device applications directly related to respiration [by patient] 4) Power for medical devices used directly on patients 5) Calibration of medical devices intended for (1) through (4)
SLIDE 12
Pre-Design: Who is the AHJ for Medical Gas Systems?
SLIDE 13 Pre-Design: Who is the AHJ for Medical Gas Systems?
- Medical gas inspector and verifier
- Third party hired by owner
- Certified (i.e. Inspector ASSE 6020, Verifier
ASSE 6030)
- Same person?
- Worth identifying and getting involved
early!
SLIDE 14 Design Coordination: Source Equipment
Vs. Vs.
SLIDE 15
Design Coordination: Source Equipment
SLIDE 16 Design Coordination: EOSC Coordination
Emergency Oxygen Supply connection
- 11.7.3.5.1.1 – Protect oxygen from coming in contact with
asphalt due to spark/static concerns.
- 20' w x 20' long Concrete pad for EOSC
- For EOSC - 18' long trailer, 500 gal
- Standard Oxygen tanker is 65' long
SLIDE 17
Design Coordination: Why are all these locations important?
SLIDE 18 Design Coordination: ZVB
SLIDE 19 Design Coordination: ZVB
SLIDE 20 Design Coordination: ZVB
5.1.4.8 Zone Valves. All station outlets/inlets shall be supplied through a zone valve as follows: 1) The zone valve shall be placed such that a wall intervenes between the valve and outlets/inlets that it controls 2) The zone valve shall serve only outlets/inlets located in the same story 3) The zone valve shall not be located in a room with station
- utlets/inlets that it controls.
SLIDE 21
Design Coordination: ZVB
SLIDE 22 Design Coordination: ZVB
5.1.4.8.4 zone valve boxes shall be installed where they are visible and accessible at all times.
SLIDE 23 Construction - and Beyond
System checks (and back checks)
- Required when a system is breached: pipeline intrusion or
component replacement.
- System meets NFPA 99 Standards
- Proper equipment and material were used
- Work was performed % pretested by credentialed installers
- Systems are functioning properly
- Gas purity/particulates are safe for patient use.
- Documentation for facility record.
SLIDE 24 Construction - and Beyond: Installer
Preconstruction Meeting
- Certification Review
- Material Review
ASSE 6010
- System Clearing
- Pressure Test
- Cross Connection Test
- Initial Piping Purge Test
- Repair Leaks and Defects
- Repair Medical Gas Systems
- Provide Report to Engineer
SLIDE 25 Construction - and Beyond: Inspector
ASSE 6020
- Inspector’s Log
- Test and Inspection Report
- Document List
- Confirm compliance with NFPA 99
- Visual inspections
- Final System Verification Report
- Report Data
SLIDE 26 Construction - and Beyond: Verifier
ASSE 6030
- Prepare Test Equipment
- Standing Pressure and
Vacuum Tests
- Cross-Connection Test
- Shut-Off Valve Test
- Master, Area, and Local
Alarm Test
- Piping Purge Test
- Piping particulate Test
- Piping Purity Test
- Final Tie-In Test
- Operational Pressure Test
- Medical Gas Concentration Test
- Medical Air Purity Test for
Compressor Systems
- Labeling of System Components
- Medical Gas Supply Source Tests
- Medical Air Compressor System
Tests
- Medical/Surgical Vacuum System
Tests
- Bulk Medical Gas Supply System
Tests
SLIDE 27 NFPA 99 2018 Updates: Items of Note
- A new Chapter 15, on dental gas and vacuum piping systems within
a healthcare facility, has been added to the code.
- All information pertaining to dental facilities has been removed from
the text of Category 3.
- Permitted Locations: added simulation areas.
- Auxiliary Source Connection now required.
- Corrugated Medical Gas Tubing (CMT) is now allowed.
- HEPA filter now required on vacuum inlet of the vacuum system inlet.
SLIDE 28 Summary
- Pre-design (codes, standards, and AHJ’s)
- Design coordination (common items)
- Construction - and beyond
- NFPA 99 2018 Update
- Why is this important?
SLIDE 29 Questions?
CHRISTOPH LOHR PE, CPD, LEED AP BD+C, ASSE 6020 Technical Leader | Plumbing Engineer HENDERSON ENGINEERS 5343 N. 16th Street, Suite 460 | Phoenix, AZ 85016 TEL (602) 336-5240 CELL (248) 736-4940 christoph.lohr@hendersonengineers.com HENDERSONENGINEERS.COM LICENSED IN AZ, NV “CREATING ENVIRONMENTS WHERE PEOPLE CAN REACH THEIR FULL POTENTIAL.”
