ASME A112.18.2:2005 pdf free download

ASME A112.18.2:2005 pdf free download.Plumbing waste fittings.
4.3.3 Compression and union nuts
Threads for compcesson 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 600 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 816.23 or B1 6.29.
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
)oints 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 any significant surface on which the fitting is installed.
4.6 Dimensions
4.6.1 Outlet size
4.6.1.1 Lavatory and bidet waste fittings
Lavatory and bidet waste fittings shall be provided with a minimum 1.1/4 in nominal OD outlet.
4.6.1.2 SInk, shower, bathtub, laundry tub, and bar sink waste fittings
Sink, shower bathtub, laundry tub, and bar sink waste fittings shall be provided with a minimum 1-1/2 in nominal OD outlet.
4.6.2 Slip joints
The inside diameter of slip joints shall fit with tubing of the same nominal size. Slip joints located on the inlet side of a trap shall be at least 13 mm (0.5 in) above the trap weir. See Figure 1.
4.6.3 Wall thickness
4.6.3.1 Metal tube and tubular fittings
When measured on a straight pQction of the part, the wall thickness of metal tube arid tubular fittings shall
be at least the following:
(a) brass or copper:
(i) 0.73 mm (0.029 in) unthreaded;
(ii) 0.83 mm (0.032 In) threaded by cutting; and
(iii) 0.40 mm (0.016 in) for corrugated tubing; and (b) stainless steel:
(i) 0.30mm (0.012 in) unthreaded; and
(ii) 083 mm (0032 In) threaded by cutting.
4.6.4.2
The gap between the strainer basket and the body shall be not greater than 5 mm (0.2 in). The depth of the strainer basket shall be such that, in the open position, the lip does not project above the body flange.
Holes in the sti-ainer basket shall be not greater than 5 mm (0.2 in) in the minor dimension.
4.6.4.3
The strainer body thread shall be made to accommodate a nut with a 1.1/2—11.1/2 NPSM thread that complies with ASME 61.20.1. See Figure 2.
4.6.4.4
Tailpieces incorporating an adapter for a dishwasher hose connection shall comply with Figure 3.
4.6.5 Traps
4.6.5.1
Fixture traps shall have a minimum trap seal of 50 mm (2.0 in). See Figure 1.