5 Facts about Central Gas System

A central gas system is a setting up for internal sharing of gas from a cylinder, bundle or tank to the point of use. Gases are usually stored compressed or  liquefied in suitable cylinders. It is always important to use the right equipment for moving the gases from their containers in order to make sure safety and preserve the excellence of the gases. The purpose of Central gas supply systems (CGS) is used for  large  amount gas delivery and on-site gas storing in cylinders, multi-cylinder bundles, cryogenic vessels with extraordinary containers. Gas distribution is provided by pipe line from the central point up to the final application place.

The basic components CGS of system are:

·         Gas supply from either manifolds or tanks.

·         Safety equipment.

·         Pipelines.

·         Tapping point.

Gas manifold or tanks:  a tank for storage of natural or manufactured gas or the fuel tank supplying a gasoline engine. A cryogenic tank is used for large and stable consumption. The volume of the tank is selected according to its real gas consumption. The manifold consists of all needed apparatus to fix the cylinder  and supplying the cylinder with a given stream and pressure.

Safety equipment:

·         Flashback arrestors – A flashback arrestor  is a gas safety device used in oxy-fuel welding and cutting to stop the flame and reverse flow of gas into the equipment. It protects the user and equipment from explosions.

·         Non-return valves - Non-return valves are used with integration loops in heating and cooling systems to make certain proper process, and with household water systems to prevent backflow. Examples are  Clapper type non return valve and Spring type non return valve.

·         Safety relief valves- A pressure relief valve (PRV) is a type of safety valve used to control and limit the pressure in a system. The pressure may create a process interruption and, instrument failure then fire the system..

·         Gas filters - Mott's gas process filters are ideal choices for high temperature gas filtration. The gas filtration systems used for removing contaminants from oxygen. Rust and pipe scale removal from steam.

·         Ball valves- A ball valve is commonly used as a shut off device for water, gas, or oil in Plumbing and Heating Systems. Ball Valves are made in  Brass, Bronze, Stainless Steel, PVC and CPV materials. It may used for urgent situation shut-off as well as isolation for repairs for maintenance.

Pipe lines

·         Liquid pipelines- natural gas liquids (NGLs) like ethane, propane and butane, are separated from the natural gas, and contaminants like water, carbon dioxide and hydrogen sulfide are removed, before send through liquid pipelines to oil refineries for further processing.

·         Pipelines : Pipelines also collect crude oil from many rural areas to deliver to refineries and chemical plants to create all the products that come from petroleum and petrochemicals manufacturing. Jet fuel travels by pipeline to every major airport. Cylinder pressure regulators are also used in pipeline systems as transport- able source for maintenance purpose or ultimate source supply. A supply boardis used in a central gas supply system in order to reduce the cylinder pressure to an appointed secondary pressure. Steel and copper are the most common materials. PVC and polyethylene pipes are used for buried in the ground near  building. The  iron pipes, yellow brass pipes and aluminum pipes were used in various situations according their need.

Tapping Points: The points of gas consumption are called tapping points. From the central gas tanks the gas is transported in a distribution network to all points of utilization. The tapping points are installed according to the plan of the gas application.  Standard gas tubes must be used from the tapping points.

                           

Central gas offer systems (CGS) are supported high volume gas delivery and on-the-spot gas stocking in cylinders, multi-cylinder packages (bundles), refrigerant vessels with vaporizers or in special containers. Gas distribution is provided by pipe line from the central emphasize to the ultimate application place. Gas goes from the supply through high manifold with pressure regulator wherever the recess pressure from the majority is reduced to the extent acceptable for the pipes and alternative parts of the gas distribution system. At the top of the pipeline outlet points would be fitted to line gas parameters e.g. pressure and flow-rate in line with request. once CGS system systems are put in in industrial plants, operating potency, economic savings and conjointly safety aspects can grow in reference to enlarged gas consumption

.FACTORS CONSIDERED I CENTRAL GAS SYSTEM

·         consistent supply system with nonstop gas delivery with no gas flow blocks

·         More precise gas parameters adjustment was made

·         Higher safety level because of high pressure gas storage and installation located in specified and safe place

·         More space at the working place is needed

·         Usually lower gas costs due to high volume delivery

Application fields of CGS

·         Automotive and transportation

·         Metal & glass & plastics & paper production and fabrication

·         Flame, arc, plasma and laser welding and cutting processes

·         Chemical & petrochemical industry

·         Metallurgy

·         Oil & gas refinery

·         Off-shore & shipyards

·         Energy and power

·         Ecology & environment

·         Food & beverages production and packaging

·         Craftsmen & workshops

·         On-site constructions