ASME A112.18.1 pdf free download

ASME A112.18.1-2012 pdf free download.Plumbing supply fittings.
3 Definitions and abbreviations
3.1 Definitions
The following definitions shall apply in this Standard:
Accessible — readily serviceable or readily replaceable.
Accessible design a design approach for making devices accessible to persons with physical, sensory, or cognitive disabilities.
Note: Accessible designs were formerly coiled baffler-free des.gns.
Accessory — a component that can, at the discretion of the user, be readily added, removed, or replaced and that, when removed, will not prevent the fitting from fulfilling its primary function.
Note: Examples include aerators, hand-held shower assemblies, shower heads, and in-fine flow controls.
Air gap – the unobstructed vertical distance, through air, between the lowest point of a water supply outlet and the mounting deck of the fitting.
Automatic compensating valve -— a water-mixing valve that is supplied with hot and cold water and that provides a means of automatically maintaining the water temperature selected for an outlet.
Note: Automatic compensating valves ore used to reduce the risk of scalding and thermal shock.
Backflow — a flowing back or reversal of the normal direction of flow.
Note: Sack siphonage and hock pressure are types of bock flow.
Backflow prevention device — a mechanical device, whether used singly or in combination with other devices, that automatically prevents reversal of water flow in a water system due to back pressure or back siphonage.
Back pressure — pressure higher at the downstream or outlet end of a water system than at a point upstream.
Back siphonage — backflow caused by below-atmospheric pressure in the water system.
Body spray — a shower device for spraying water onto a bather other than from the overhead position. Note: An example is a device mounted on a wall below the bother’s head that sprays water in an approximately horizontal direction and con be fixed or allowed to swivel on a ball joint.
Critical level (CL) — the lowest water level in a fitting at which back siphonage will not occur.
Cross-flow — the exchange of water from one supply to the other without water flowing through the mixing valve outlet(s).
Defect
Blister — a dome-shaped defect resulting from loss of adhesion between layers or between one or more layers and the substrate.
Crack (as applied In coatings evaluation) —
(a) a separation in a coating layer that extends down to the next layer or to the substrate in a coating that has lost its adhesion; or
4 December2012
(b) any indication of a crack (e.g., white deposits or corrosion) that results from performance tests, allows penetration through a plating layer, and did not appear on the surface or part before performance testing.
Note: Coating surface deformations that appear after performance testing (e.g., stretch marks, flow lines under the coating, or deformations caused by stress relieving of the substrate) and do not separate, peel, or come loose are not considered cracks.
Pit a small depression or cavity.
Surface defect — a pit, blister, crack, peeling, wrinkling, corrosion, or exposure of the substrate visible to the unaided eye at normal reading distance.
Note: “Unaided eye” includes vision assisted by corrective lenses normally worn by the person inspecting a device for surface defects.
Diverter a device that is integral to a fitting or that functions as an accessory and is used to direct the flow of water from a primary outlet to one or more secondary outlets.
Faucet — a terminal fitting.
Lawn faucet — a faucet designed to be installed horizontally on the outside wall of a building with
male or female IPS threads or copper solder connections on the inlet and hose threads on the outlet.
Notes:
(1) Lawn faucets can be frostproof.
(2) The outlet is usually angled 450 from the horizontal. Lawn faucets indude a flange that mounts flush with the wall.
Sediment faucet — a horizontal faucet with male or female IPS threads on the inlet side and male
hose threads at the outlet spout.
Notes:
(1) The outlet can be angled approximately perpendicularly to the inlet or angled outward.
(2) Sediment faucets were formerly called boiler drains because they were originally designed to drain water from boilers and release any accumulated sediment. Today they are also used in laundry rooms as hook-ups for washing machines.
Self-closing faucet — a faucet that closes itself after the actuation or control mechanism is deactivated.
Note: The actuation or control mechanism con be mechanical or electronic.
Fitting — a device that controls and guides the flow of water.
Note: Fittings include faucets and valves.
Combination fitting — a fitting with more than one supply inlet delivering water through a single spout.
Concealed fitting — a fitting with its body mounted beneath or behind a fixture, wall, or surface.
Deck-mounted fitting — a fitting that is mounted on top of a horizontal surface.
Exposed fitting — a fitting whose body is mounted above or in front of a fixture’s deck or shelf.
Line fitting — a fitting that does not discharge to atmosphere.
Public lavatory fitting — a fitting intended to be installed in non-residential bathrooms that are exposed to walk-in traffic.
Supply fitting — a fitting that controls and guides the flow of water in a supply system. Terminal fitting — a fitting with an open or atmospheric discharge.ASME A112.18.1 pdf download.