ASME A112.18.2 pdf download

ASME A112.18.2 pdf download.Plumbing waste fittings.
a) plumbing supply fittings, which are covered by ASME A112.18.1/CSA B125.1;
b) other devices (e.g., temperature-actuated in-line mixing valves), which are covered by SA 8125.3 or other plumbing product standards; and
c) flexible water connectors under continuous pressure, which are covered by ASME A112.18.6/ CSA 8125.6.
This Standard does not cover pipes and tubes or pipe and tube fittings that are downstream of the trap.
In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “shouId’ is used to express a recommendation or that which is advised but not required; and “maya is used to express an option or that which is permissible within the limits of the standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.
SI units are the units of record in Canada. In this Standard, the Inch/pound units are shown In parentheses.
The values stated In each measurement system are equivalent In application; however, each system Is to be used Independently. Combining values from the two measurement systems can result In nonconformance with this Standard.
All references to gallons are to U.S. gallons.
For information on the conversion criteria used in this Standard, see Annex A.
4.2.2 Protection of finish
Provision shall be made to enable waste fittings to be connected and mounted without marring the finish or otherwise damaging the fitting or the surface on which it is to be mounted.
4.2.3 Fixture seal
Provision shall be made for a method of establishing a seal between a waste fitting and the fixture to which It is fastened.
4.3 Threads
4.3.1 DWV plastic pipe and fittings
Taper threads used on plastic tubular waste fittings complying with Clause 4.1.3 and used on ABS or PVC DWV plastic pipe and pipe fittings complying with Clause 4.1.4 shall
a) bemoulded;
b) comply with ASTM F1498; and
c) be a minimum of 2.5 threads lofig, with a minimum of one thread engagement.
4.3.2 Metallic pipes and fittings
Threads used on pipe and fittings manufactured from metallic base materials shall comply with ASME
B1.20.1.
4.3.3 Compression and union nuts
Threads for compression and union nuts shall be a minimum of 2.5 threads long, with a minimum of one thread engagement The threads shall be NPSM threads. The thread form shall comply with Table 6 of ASME B1.20.1.
4.3.4 Tapped bosses
Tapped bosses for threaded tubing shall have 1-1/4 or 1-1/2 x 27 or 28 threads per inch ASA 60 thread and shall be at least 2.5 threads long
4.4 Solder connections
The dimensions of solder joint ends for connection to copper tube or copper tube fittings (except factory-assembled parts) shall comply with ASME B16.23 or ASME B16.29.
4.5 Replacement parts
4.5.1 Use of standard tools
Repair and maintenance of waste fittings shall be accomplished with the use of standard tools.
4.5.2 Replacement part design
Joints that have to be taken apart to replace worn parts after the fitting is installed shall be designed so that disassembly and replacement are possible without damaging or marring the fitting or significant surface on which the fitting is installed.