ASME A112.19.8A pdf free download

ASME A112.19.8A pdf free download Addenda to ASME A112.19.8-2007 Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, and Hot Tubs
Test Method 1 is suited for products small enough tofit into the Uv test chamber,while Test Method 2 issuitable for all products.
If Test Method 1 is used,then the ultraviolet test aswell as all the structural tests,are performed on thecomplete (as sold) samples.
If Test Method 2 is used, then the ultraviolet test isperformed on”dogbone” samples molded per ASTMiD 638 from the same resin as the final production sam-ples. The tensile strength and Izod impact tests are per-formed on two sets of the “dogbone”samples, set A isnonexposed and set B is exposed to the ultraviolet test.In addition, all the applicable structural tests (paras.3.3through 3.8) are also performed on the complete (assold) virgin samples.The performance requirements forthose tests,however, will be adjusted per para.3.2.2.3of this Standard.
EXCEPTION: Manufactured sumps and other fitting componentsthat are not exposed to natural Uv radiation when fully assembledand installed, according to the manufacturer’s instruction,shall notbe required to be included in the Ultraviolet Light Exposure Test.3.2.1Test Method 1. Twelve new fitting specimensshall be exposed to ultraviolet light and water spray inaccordance with either
a) 720 hr of twin enclosed carbon-arc (ASTM G 153,Table X1.1 Cycle 1).
b)1,000 hr of xenon-arc (ASTM G 155,Table X3.1Cycle 1), or
(c)750 hr of fluorescent (ASTM G 154,Table X2.1Cycle 1).
3.2.1.1 Test Method 1. Specimens shall bemounted inside the test apparatus,with exposed sur-faces of the specimens facing the UV lamps and posi-tioned so they receive exposure approximating a fullyassembled and installed cover / grate fitting.After theexposure test, the specimens shall be removed from thetest apparatus and rejected if signs of deterioration suchas cracking or crazing appear.
Discoloration shall not be cause for rejection. Theyshall then be retained under conditions of ambient roomtemperature and atmospheric pressure for not less than16 hr and not more than 96 hr before being subjectedto the following tests:
a) Deflection Tests
byPoint Load to Protrusion Test(c)Shear Load Test
id) vacuum and Point Impact Test(d) Pull Load Test
The intensification factor K shall be 1.0 for UV TestMethod 1.
The exposed specimen shall be permitted to be trans-ported from one laboratory to another, provided timerequirements are met.
3.2.1.2 Performance Requirement.All the speci-mens that were subject to the UV Test Method 1 shallcomply with all performance requirements of the struc-tural integrity tests in paras.3.3 through 3.8.
3.2.2 Test Method 2. Samples of the fitting poly-meric materials shall be exposed to ultraviolet light inaccordance with the options specified in para. 3.2.1(a).(b), or (c),Test Method 1,and then to the tests specifiedin paras. 3.2.2.1 and 3.2.2.2.
3.2.2.1 Tensile Strength. Samples of virgin mate-rial(A) and Uv-exposed material (B) shall be evaluatedfor tensile strength as described in the Standard TestMethod for Tensile Properties of Plastics,ANSI / ASTMD638 (ISO 527-2) using Type 1 specimens of 0.125 in.±0.02 in.(3.2 mm ± 0.4 mm) thickness and testing speedof 0.2 in./ min (5.1 mm/ min)± 25%.The tensile strengthis to be that at the yield point if the material yields,otherwise at break.
3.2.2.2 lzod lmpact. Samples of virgin material(A) and UV-exposed material (B) shall be evaluated forimpact strength as described in Method A of the Stan-dard Test Methods for Impact Resistance of Plastics andElectrical Insulating Materials,ASTM D 256 or ISO 180,using 0.125-in. (3.2-mm) thick specimen.
3.2.2.3 Performance Requirement.Samples of thematerial shall retain at least 70% of the unconditioned(virgin) value when the tests indicated in paras.3.2.2.1and 3.2.2.2 are performed. An intensification factor Kshall be defined as the inverse of the lowest retainedproportion. The applicable structural integrity tests, i.e.,paras.3.3,3.4,3.5,3.6,3.7, and 3.8,will be conductedon the complete (as sold) non-Uv exposed samples atloadings equal to the base values multiplied by the inten-sification factor，K. For example, if 80%of the tensilestrength is retained in para.3.2.2.1, and 85% of the Izodunit energy is retained,then K = 6.so= 1.25.Thiswill ensure that adequate strength remains after serviceaging.
NOTE: In the following paragraphs, the factor K is derived frompara.3.2.1.1(Test Method 1) or para.3.2.2-3 (Test Method 2y.3.3 Vertical Load and Deformation Test
Six fittings intended for installation in the floor orwall 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 in.(51 mm 主 13 mm) radius nose and a tup speed of0.20 in./ min to 0.25 in./ min (5.1 mm / min to6.4 mm / min) shall be used.