The purpose of this standard is to provide the minimum requirements for sodium polyphosphate, glassy, including physical, chemical, sampling, packaging, shipping, and testing requirements.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003Sodium polyphosphate, glassy (Nan+2 PnOn+1, n = 12\u201316 or 18\u201321), is a manufactured product obtained by combining comparatively pure chemicals\u2014soda ash (Na2CO3) or caustic soda (NaOH)\u2014with phosphoric acid. Although the resulting product is I.B.\tHistory.\u2003The first edition of AWWA B502 was approved as tentative on January 23, 1966. It was approved as a standard on June 1, 1967, and published as AWWA B502-67. Subsequent revisions were approved by the AWWA Board of Directors as ANSI\/AWWA B502-7 I.C.\tAcceptance.\u2003In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | II.\tSpecial Issues. II.A.\tStorage and Handling Precautions.\u2003Sodium polyphosphate, glassy, is hygroscopic in nature and must be stored under dry conditions. Exposure to humidity produces a sticky film on the exposed material. This results in poor flow and caking, which interf III.\tUse of This Standard.\u2003It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A.\tPurchaser Options and Alternatives.\u2003The following information should be provided by the purchaser. III.B.\tModification to Standard.\u2003Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major changes made to the standard in this revision include the following: <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | V.\tComments.\u2003If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standards@awwa.org. <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | AWWA Standard SECTION 1:\tGENERAL Sec. 1.1\tScope Sec. 1.2\tPurpose Sec. 1.3\tApplication <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | SECTION 2:\tREFERENCES SECTION 3:\tDEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | SECTION 4:\tREQUIREMENTS Sec. 4.1\tPhysical Requirements* <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Sec. 4.2 Chemical Requirements <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Sec. 4.3\tImpurities\u2021 SECTION 5:\tVERIFICATION Sec. 5.1\tSampling <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Sec. 5.2\tTest Procedures <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Sec. 5.3\tNotice of Nonconformance SECTION 6:\tDELIVERY Sec. 6.1\tMarking <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Sec. 6.2 Packaging and Shipping <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Sec. 6.3\tAffidavit of Compliance or Certified Analysis <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA B502-23 Sodium Polyphosphate, Glassy (Sodium Hexametaphosphate)<\/b><\/p>\n |