ASME A112.19.7-2006 pdf download

ASME A112.19.7-2006 pdf download.Hydromassage Bathtub Appliances.
2.8 Suction Fitting Design
Apertures in suction fitting covers shall not allow the passage of a 0.31 in. (7.87 mm) circular rod with an applied force no greater then 5 lbf (22 N).
3 TESTING
3.1 Water Retention Within Whirlpool or Air-Jetted Bathtub Appliances
Hydromassage bathtub appliances shall be of such design as to prevent retention of water in excess of 1.5 fi oz (44 mL) for each jet and suction fitting. Maximum water retention for air-jetted hydromassage appliances shall not exceed 13.5 fi oz (400 mL). Tests shall be conducted in accordance with this paragraph and the sampling method cited in para. 3.4.
NOTE: For example, a whirlpool bathtub appliance with four jets and one suction fitting satisfies this requirement if the residual water is equal to or less than 75 fI oz (220 mL). An air-jetted hydromassage appliance shall not have residual water in excess of 13.5 II oz (400 mL) regardless of the number of air jets. For combination whirlpool and air-jetted appliances, these amounts are cumulative. For example, the maximum residual water allowed in a combination four-jet one-suction fitting whirlpool and air- jetted appliance is 21 0 oz (620 mL).
3.1.1 Preconditioning (Flexible Circulation Piping Only). Where flexible piping is used, water at 135°F ± 5°F (57°C ± 3°C) shall be placed in the unit at a height required to properly operate the appliance. The water shall be circulated for 2 hr ± 10 miii. The water temperature shall be maintained by covering or other means so that the water temperature, after the 2 hr test, shall not be less than 130°F (54°C). After the 2 hr test period, the fixture shall be drained and allowed to cool to ambient temperature.
NOTE: This preconditioning test shall not apply where flexible circulation piping is supported at maximum intervals of 12 in. (304 mm) in length, or where less than a total of 12 in. (304 mm) of flexible circulation piping is used in a section immediately adjacent to the pump motor.
3.1.2 Procedure. The following test procedure shall be conducted within a 1 hr ± 5 mm time interval.
NOTE: Water retention shall be evaluated using a chlorine test. Good laboratory technique is critical to prevent inadvertent contamination of samples.
(a) The whirlpool or air-jetted bathtub appliance shall be positioned in a level and connected position as it would be installed in the field. Directional jets which are not self-adjusting shall be positioned horizontally.
(b) The appliance shall be filled with water 75°F ± 5°F (24°C ± 3°C) until jets are completely covered. The chlorine level of the test water shall be recorded.
(c) The pump shall be operated from 2 mm to 3 mm.
(d) The appliance shall be allowed to drain completely.
(b) Inking Procedure
(1) Test Method. After the unit has been washed and dried as described in para. 3.2.1.2, the entire finished surface of the fitting shall be rubbed with a sponge and a 50% solution of tap water and water soluble contrasting color ink. The ink shall be rinsed from the surface and then dried before inspection.
(2) Performance Requirement. The fitting shall be free from cracks. The presence of seams, flow lines, and knit lines within fittings shall be permitted and shall not be considered as cracks.
3.2.1.3 Conditioning. All specimens shall be submerged in water at a temperature of 73.4°F ± 3°F (23°C ± 2°C) for at least 2 hr before testing.
3.2.1.4 Test Fixture. The fitting(s) shall he installed in a rigid fixture which is capable of supporting the fitting(s) in a manner similar to the actual installation.
3.2.1.4.1 Test Equipment for Load and Deflection
Tests. A point load machine calibrated in 5 lb (2.3 kg) increments and which is equipped with a 2 in. ± 1/32 in. (51 mm ± 13 mm) radius nose shall be used. Load speed shall be 0.20 in./min to 0.25 in./min (5.1 mm/mm to 6.4 mm/mm).
3.2.2 Structural Integrity Tests
3.2.2.1 Deflection Testing of a Fitting Intended for Installation In a Horizontal Plane
3.2.2.1.1 Test Method. The center of the fitting face shall be subjected to a point load of 300 lb ± 10 lb (136 kg ± 4.5 kg) using the tup and tup speed described in para. 3.2.1.4.1. Six units shall be tested.