Warning: preg_match_all(): Compilation failed: missing closing parenthesis at offset 70 in /www/wwwroot/standards.biao-zhun.cn/wp-content/themes/begin/inc/inc.php on line 927
Warning: preg_match_all(): Compilation failed: missing closing parenthesis at offset 70 in /www/wwwroot/standards.biao-zhun.cn/wp-content/themes/begin/inc/inc.php on line 928
Warning: preg_match_all(): Compilation failed: unmatched closing parenthesis at offset 21 in /www/wwwroot/standards.biao-zhun.cn/wp-content/themes/begin/inc/inc.php on line 927
Warning: preg_match_all(): Compilation failed: unmatched closing parenthesis at offset 21 in /www/wwwroot/standards.biao-zhun.cn/wp-content/themes/begin/inc/inc.php on line 928
ANSI AWWA C905-10 pdf download.Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 14 In. Through 48 In. (350 mm Through 1,200 mm)
The selection of materials is critical for water service and distribution piping in locations where there is likelihood the pipe will be exposed to signifi cant con- centrations of pollutants comprised of low-molecular-weight petroleum products or organic solvents or their vapors. Research has documented that pipe materials such as polyethylene, polybutylene, PVC, and asbestos cement; and elastomers, such as used in jointing gaskets and packing glands, are subject to permeation by lower-molecular-weight organic solvents or petroleum products. If a water pipe must pass through such a contaminated area or an area subject to contamination, consult with the manufacturer regarding permeation of pipe walls, jointing materi- als, etc., before selecting materials for use in that area.
4.2.3 Rework materials. Clean rework materials derived from a manufac- turer’s own pipe or fi tting product may be used by the same manufacturer for similar purposes provided that (1) the cell classifi cation of the rework material is identical to the material to which it will be added; (2) the rework material complies with applicable requirements of Sec. 4.2 of this standard; and (3) the fi nished prod- ucts comply with the requirements of this standard.
4.2.4 Certifi cation for potable-water service. PVC compounds and prod- ucts shall be tested for chemical extractants and certifi ed as suitable for potable water service by an accredited testing agency acceptable to the purchaser. T e basis of certifi cation shall be the requirements specifi ed in NSF/ANSI 61.
4.2.5 Gaskets and lubricants. Gaskets and lubricants intended for use with PVC pipe and fabricated fi ttings shall be made from materials that are compatible with the pipe and with each other when used together. Gaskets and lubricants shall not adversely aff ect the potable quality of the water that is to be transported (see foreword, Sec. I.C).ANSI AWWA C905-10 pdf download.