Downstream of the meter, the internal system develops, which, through a set of pipes, distributes the fluid to the various user devices (boiler, hob). There is the entry of the domestic gas pipe inside the casing at any point. It is always mandatory to insert the general shut-off cock, which excludes the entire domestic network.

The pipes that make up the internal system can be installed externally or concealed. The exposed pipes can be iron, brass, copper, and coated stainless steel (for example, those used to connect the kitchen). This can never be laid on sight when using multilayer piping but only concealed.     

Then there are also pipes in plastic material, or more precisely in polyethylene, which are instead particularly versatile and can be used both for internal systems and for distribution downstream of the public pipeline. They can also be housed in underground pipes through a Regulator for Oxygen Tank.

Regarding the concealed construction, the UNI CIG 7129 standard prescribes precise safety rules to be respected, including the distances of the piping routes from the edges of walls and ceilings and the correct installation of taps manifolds, fittings, and joints.

It is essential to underline that the traces must never be used to earth electrical appliances or other improper uses in the concealed installation. Furthermore, the concealed gas system must be reported not to be accidentally drilled or tampered with during construction or in the following years due to possible decay in anomalous or particularly critical environmental situations.

Basic features of medical gas outlets

Likewise, there is a sensor in the medical airline to check for Carbon Monoxide, which could be fatal if administered during surgery. As Medical Oxygen Flowmeter is used, the medical air comes from the receiver tank through a one-micron filter and past a test port.

The preventative maintenance inspector measures electrical inputs to diagnose any internal friction in the pump and visually inspects belts, driveline parts, and the sensors in and around the pump to ensure they send the proper signals to the alarms. 

The fittings in the gas system and the testing

Another fundamental element of a gas system is the fittings. According to the UNI, the execution of the joints can be carried out with the pressing or welding technique (also called brazing), specifically:

The use of threaded fittings is allowed.

It is possible to lay Oxygen Regulators in the press joints, welded (except in any case the taps) directly concealed, always drowned in the mortar.

The hose that attaches the appliance to the wall can be reused. Hospital staff should check these lines to ensure they are not crooked or cracked. This can reduce system pressure or draw air from the room, resulting in the overloading of the vacuum pump. The most common are concerns about the tubing in the surgical area. It can be bent, pressed, or pressed by the device. They can also accumulate waste in the vacuum state, reducing the system's efficiency in helping the surgical staff.