A |
| |  Standardised profile A of an edge, pavement kerb, designed to be surmountable.
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A15 |
| | Classification of municipal castings according to the level of resistance to the test load provided for by EN124. This class covers units installed in areas likely to be used exclusively by pedestrians and cyclists.
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accessories |
| | Definition according to standard EN 805: components other than pipes, fittings (or special castings) or valve units incorporated in a main, e.g. glands, joint locking bolts and circlips, tapping devices.
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Accreditation |
| | Recognition by a competent, independent entity of the ability of a certifying organisation to issue certificates. The organisation is accredited either: - on the basis of standard EN45011 for organisations certifying products and services
- or on the basis of standard EN45012 for quality system certifying organisations
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actuator |
| | Mechanism operating a valve, control valve or annular valve. The actuator can be manual (lever, handwheel), electric, hydraulic or pneumatic.
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Adjustability |
| | Manhole frame adjustment to ground level by sliding inside a joint.
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adjustment valve |
| | A valve for adjusting the flow rate in a pipeline.
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Aeration |
| | Fast flow admittance of air into a water main
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Aeration area |
| | All openings provided in a cover for sewer ventilation.
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Air valve |
| | An automatically functioning valve for venting air from water mains or for air admittance. Performs deaeration, aeration and degassing functions.
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allowable maximum operating pressure (PMA) |
| | According to standard EN 805: The maximum pressure that a component is capable of withstanding when subjected intermittently to it in service, including water hammer.
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Allowable operating pressure (PFA) |
| | According to standard EN 805: The maximum hydrostatic pressure a component is capable of withstanding permanently in service.
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Allowable test pressure on site (PEA) |
| | According to standard EN 805: The maximum hydrostatic pressure that a newly installed component is capable of withstanding for a relatively short time period to ensure the integrity and leaktightness of the pipes.
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anchor blocks |
| | Commonly made of concrete, anchor blocks contain the thrust forces exerted by a pressurised socket joint main.
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Anchoring Equivalent terms: Anchoring |
| | The action of securing a frame to the top of a chamber with cement mortar, or a special product designed for the purpose. The holes, or grooves, in the frames participate with the material used in forming a bond between the frame and concrete or brickwork. This is vital for effective, safe and durable performance of the municipal castings.
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Anchoring Equivalent terms: Anchoring |
| | Bond between the frame and embedment material. The apertures, or slots, or notching on the frame base provide effective frame anchorage.
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Antitheft Equivalent terms: Antitheft lock |
| | Device which prevents non-authorised removal of a frame or grate. This device can be: - either a turn type lock operated with a specific key
- or a sprung bar in some products (e.g. Rexel, Squadra, Autolinea, Selecta) which only releases the grating or cover following a special operation using a tool.
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Artificial Portland Cement Equivalent terms: Ordinary portland cement |
| | Artificial portland cement obtained by calcining a mixture of clay and limestone at 1450ºC.
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assembly |
| | Watertight and often rigid joining of two pipe ends in the same pipeline, one component and a valve, or two valves
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assembly Equivalent terms: joint, junction |
| | Joining of two pipe ends
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Assembly |
| | Joining of 2 pipe ends and/or fittings with joint ring providing the seal.
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