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eLibrary > AWWA B502-23 Sodium Polyphosphate, Glassy (Sodium Hexametaphosphate) >

AWWA B502-23 Sodium Polyphosphate, Glassy (Sodium Hexametaphosphate), 2023

Foreword [Go to Page]
I. Introduction. [Go to Page]
I.A. Background. Sodium polyphosphate, glassy (Nan+2 PnOn+1, n = 12–16 or 18–21), is a manufactured product obtained by combining comparatively pure chemicals—soda ash (Na2CO3) or caustic soda (NaOH)—with phosphoric acid. Although the resulting product is [Go to Page]
I.B. History. The 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 [Go to Page]
I.C. Acceptance. In 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
II. Special Issues. [Go to Page]
II.A. Storage and Handling Precautions. Sodium 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. Use of This Standard. It 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. [Go to Page]
III.A. Purchaser Options and Alternatives. The following information should be provided by the purchaser. [Go to Page]
III.B. Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser.
IV. Major Revisions. Major changes made to the standard in this revision include the following:
V. Comments. If 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.
AWWA Standard
SECTION 1: GENERAL
Sec. 1.1 Scope
Sec. 1.2 Purpose
Sec. 1.3 Application
SECTION 2: REFERENCES
SECTION 3: DEFINITIONS
SECTION 4: REQUIREMENTS
Sec. 4.1 Physical Requirements*
Sec. 4.2 Chemical Requirements
Sec. 4.3 Impurities‡
SECTION 5: VERIFICATION
Sec. 5.1 Sampling
Sec. 5.2 Test Procedures
Sec. 5.3 Notice of Nonconformance
SECTION 6: DELIVERY
Sec. 6.1 Marking
Sec. 6.2 Packaging and Shipping
Sec. 6.3 Affidavit of Compliance or Certified Analysis [Go to Page]

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