ASME A112.19.8a-2008 pdf download

ASME A112.19.8a-2008 pdf download

ASME A112.19.8a-2008 pdf download.Addenda to ASME A112.19.8-2007 Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, and Hot Tubs.
ANSI/NSPI-5, Standard for Residential Inground Swimming Pools ANSI/NSPI-6, Standard for Residential Portable Spas ANSI/NSPI-8, Model Barrier Code for Residential Swimming Pools, Spas, and Hot Tubs Publisher: Association of Pool and Spa Professionals (APSP) [formerly National Spa and Pool Institute (NSPI)], 2111 Eisenhower Avenue, Alexandria, VA 22314 ASME A112.19.17, Manufactured Safety Vacuum Release Systems (SVRS) for Residential and Commer- cial Swimming Pool, Spa, Hot Tub, and Wading Pool Suction Systems Publisher: The American Society of Mechanical Engineers (ASME), Three ParkAvenue, New York, NY 10016-5990;OrderDepartment: 22 LawDrive,P.O. Box 2300, Fairfield, NJ 07007-2300 ANSI/ASTM D 638, Standard Test Method for Tensile Properties of Plastics ASTM D 256, Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics ASTM D 2444, Standard Practice for Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight) ASTM D 2466-02, Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM F 1498-2000, Standard Specification for Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings ASTM F 2387-04, Standard Provisional Specification for ManufacturedSafetyVacuumReleaseSystems(SVRS) for Swimming Pools, Spas and Hot Tubs ASTM G 154, Standard Practices for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials Publisher: ASTM International (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959
bodymembrane: arectangularinextensible isotropicsheet, for example, a 20 mil (0.5 mm) Vinyl sheet, in an 18 in. ? 49 in. (457 mm ? 1 245 mm) pattern with 4 in. (102 mm) corner radii. complete system: comprising a pump, suction outlet (and possibly inlet), and connecting piping as specified by manufacturer. No other operating components or valves may be included. Safety devices, vents, suction vacuum release systems, etc., shall be used only as specified by the manufacturer. Nonoperating components such as drains are permitted. cover: a fitting or device generally placed between the suctionpipingand the bather. Notused inthis document to avoid confusion. See also cover/grate. cover/grate: covering fitting or assembly that separates the bather from the suction sump or piping, sometimes referred to as a “grate” or a “cover.” dual blockage: a condition existing when a body mem- brane is placed to cover one suction outlet completely and any portion of the second suction outlet connected to the same individual suction system. dual outlets: two suction outlets connected to an individ- ual suction system but separated by a body membrane as a minimum. edge: the line of intersection between any two surfaces with an intersecting angle greater than 180 deg, mea- sured face to face (see Fig. 1), and having a transitional radius between the two faces of less than 0.75 in. (19 mm). Performance Requirement. All the speci- mens that were subject to the UV Test Method 1 shall comply 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 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. and Tensile Strength. Samples of virgin mate- rial (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 1 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/min) ± 25%. The tensile strength is to be that at the yield point if the material yields, otherwise at break. 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 Stan- dard 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. Performance Requirement. Samples of the material shall retain at least 70% of the unconditioned (virgin) value when the tests indicated in paras. and 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 tothe basevalues multipliedbythe inten- sification factor, K. For example, if 80% of the tensile strength is retained in para., and 85% of the Izod unit energy is retained, then K p 1 ⁄ 0.80 p 1.25. This will ensure that adequate strength remains after service aging.

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