Medical Gas Pipeline Design

Design begins with the department list, bed counts and the nature of each area (intensive care, theatres, emergency, wards, clinics), because each has a different gas requirement and a different number of terminal units per bed.

Not all terminal units operate simultaneously, so a realistic diversity factor reflecting the department's actual usage pattern is applied. Over-estimating raises cost without benefit; under-estimating causes pressure drop at peak — both are design failures.

The network is divided into zones, each isolatable through an AVSU. The working rule is that isolating one zone for maintenance or an emergency must never disable another critical department, and the valve must be in a known, reachable location for the department's staff.

• Sizes chosen to deliver required pressure and flow at the most remote point, not only at the source.
• Abrupt direction changes and unnecessary fittings minimised to reduce losses.
• Routes kept away from heat sources, electrical cabling and impact-prone areas.
• Clear dedicated risers per service with unambiguous identification and colour coding.
• Spare capacity left in risers and main branches for future expansion.

Alarm panel locations are fixed during design, not on site: a local panel in critical areas and a master panel in a location staffed around the clock, with sensing points positioned so they reflect the real pressure condition of the area served.

• As-built drawings reflecting what was actually installed.
• A valve schedule listing each valve's location and the zone it serves.
• A test and handover plan agreed with the owner in advance.
• Staff training on isolation and emergency procedures at handover.

Technical requirements are applied according to the specifications and regulations in force for the project and its approved design.