ASME A112.19.8A-2008 pdf – Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, and Hot Tubs
ASME A112.19.8A-2008 pdf – Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, and Hot Tubs.
126.96.36.199 Performance Requirement. All the specimens that were subject to the UV Test Method 1 shall comply with all performance requirements of the structural integrity tests in paras. 3.3 through 3.8.
3.2.2 Test Method 2. Samples of the fitting poiymeric materials shall be exposed to ultraviolet light in accordance with the options specified in para. 3.2.1(a), (b), or (c), Test Method 1, and then to the tests specified in paras. 188.8.131.52 and 184.108.40.206.
220.127.116.11 Tensile Strength. Samples of virgin material (A) and UV-exposed material (B) shall be evaluated for tensile strength as described in the Standard Test Method for Tensile Properties of Plastics, ANSI/ASTM D 638 (ISO 527-2) using Type I specimens of 0.125 in. ± 0.02 in. (3.2 mm ± 0.4 mm) thickness and testing speed of 0.2 in./min (5.1 mm/mm) ± 25%. The tensile strength is to be that at the yield point if the material yields, otherwise at break.
18.104.22.168 Izod Impact. Samples of virgin material (A) and UV-exposed material (B) shall be evaluated for impact strength as described in Method A of the Standard Test Methods for Impact Resistance of Plastics and Electrical Insulating Materials, ASTM D 256 or ISO 180, using 0.125-in. (3.2-mm) thick specimen.
22.214.171.124 Performance Requirement. Samples of the material shall retain at least 70% of the unconditioned (virgin) value when the tests indicated in paras. 126.96.36.199 and 188.8.131.52 are performed. An intensification factor K shall be defined as the inverse of the lowest retained proportion. The applicable structural integrity tests, i.e., paras. 3.3, 3.4, 3.5, 3.6, 3.7, and 3.8, will be conducted on the complete (as sold) non-UV exposed samples at loadings equal to the base values multiplied by the intensification factor, K. For example, if 80% of the tensile strength is retained in para. 184.108.40.206, and 85% of the Izod unit energy is retained, then K = 1/0.80 = 1.25. This will ensure that adequate strength remains after service aging.
NOTE: In the following paragraphs, the factor K is derived from para. 220.127.116.11 (Test Method 1) or para. 18.104.22.168 (Test Method 2).
3.3 Vertical Load and Deformation Test
Six fittings intended for installation in the floor or wall shall be tested.
A point load machine readable to, at a minimum, 5 lbf (22 N) increments and that is equipped with a 2 in.
(51 mm) minimum diameter steel tup with a 2 in. ± 1/2 (51 mm ± 13 mm) radius nose and a tup speed of 0.20 in./min to 0.25 in./min (5.1 mm/mm to
6.4 mm/mm) shall be used.
3.3.1 Test Method. Using the tup and a 2 in. (51 mm) (. diameter “Skin Pad” on the face of the trip, and tup speed described in para. 3.3, the six fittings shall be mounted in a horizontal plane and tested. The “Skin Pad” is a 1/4 in. (6.35 mm) thick Buna-N rubber pad of Shore A durometer 60 ± 5 hardness. The tup and pad shall be centered
(a) on the fitting face
(b) at two points midway between the center and edge
(c) at two points between stiffeners, if any
(d) at two points furthest from any support post
A load is applied at each of the above locations until 300 lbf x K ± 10 lbf (1 334 N x K ± 44 N) is reached.
3.3.2 Performance Requirement. Suction fittings shall not permanently deform, crack, or lose any material from the fitting, exclusive of plating or finish.
3.4 Horizontal Load and Deformation Test
Fittings to be tested shall be the six as previously tested in para. 3.3. This test is identical to the Vertical Test except that the load is 150 lbf x K ± 5 lbf (667 N
x K ± 22 N). This applies only to fittings intended for and marked “Wall Only” or “Wall or Floor.”
3.5 Point Load to Excess Test
Fittings to be tested shall be the six as previously tested in paras. 3.3 and 3.4, loaded in the same manner.
3.5.1 Test Method. The test equipment to be used shall be the same and positioned as described in para. 3.3, with “Skin Pad.” The units shall be subjected to additional loading, with a load speed of 0.20 in./min to 0.25 in./min (5.1 mm/mm to 6.4 mm/mm) until the tup protrudes through the cover/grate or until a value of 600 lbf x K ± 10 lbf (2 669 N x K ± 44 N) is reached.