Term
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Definition
Emergency Control Valve
A valve installed at the end of a service pipe,intended for use by the consumer to isolate the gas supply in an emergency |
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Term
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Definition
Meter Inlet Valve.
Located upstream and adjacent to the primary meter.
This valve is used to isolate the supply of gas to the meter.
Normally fitted down stream of the primary regulator |
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Term
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Definition
Design Minimum Pressure.
The minimum pressure at the end of the gas service, when the system is operating at its design flow. |
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Term
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Definition
| The pressure used in the calculation methods to design a gas system |
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Term
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Definition
Maximum Operating Pressure.
This is the maximum pressure a gas system can operate at continuously without causing damage under normal operating conditions. |
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Term
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Definition
Design Maximum Incidental Pressure.
The maximum pressure an installation is allowed to experience under fault conditions (limited by safety devices) |
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Term
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Definition
Lowest Operating Pressure
The lowest pressure a gas system can be operated at normal operating conditions.
LOP of the gas supply is provided by the gas transporter. |
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Term
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Definition
Metering Installation Excess Flow Valve
Device normally incorporated as part of the primary regulator assembly.
Main purpose to automatically shut off or restrict the gas supply, when the flow of gas exceeds a predetermined level. |
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Term
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Definition
Alternative Emergency Control Valve.
A valve which is NOT the ECV but is intended to be used by the customer to shut off gas in an emergency |
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Term
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Definition
Low Pressure.
A gas supply with a MOP not exceeding
75mbar |
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Term
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Definition
Medium Pressure.
A gas supply where the pressure is greater than 75mbar,but does not exceed 2bar. |
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Term
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Definition
Carbon Monoxide
is a colourless, odourless and poisonous gas. |
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Term
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Definition
Carbon Dioxide
is a colourless, tasteless and odourless gas. |
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Term
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Definition
Purpose made compartment
Designed and prefabricated
To accommodate a meter installation. |
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Term
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Definition
Area or room
Designed and constructed to contain one or more meters with associated gas fittings. |
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Term
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Definition
Meter Box or meter compound
external to the building. |
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Term
Pliable Connector
(semi rigid connector) |
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Definition
Stainless steel tube
formed with annular corrugations
and having factory fitted ends connections |
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Term
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Definition
Interconnecting Pipework
Pipework assembled within the meter installation. |
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