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AWWA B503-23 Sodium Tripolyphosphate, 2023
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Sodium tripolyphosphate (Na5P3O10) is a manufactured product obtained by combining a comparatively pure chemical—soda ash (Na2CO3) or caustic soda (NaOH)—with phosphoric acid (H3PO4). The resultant product is subjected to controlled condi [Go to Page]
- I.B. History. The first edition of ANSI/AWWA B503 was developed by the AWWA Committee on Scale and Corrosion-Control Chemicals. It was first published in 1978. Subsequent revisions were approved by the AWWA Board of Directors in 1984, 1989, 1994, 2001, 20 [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 tripolyphosphate is slightly hygroscopic and must be stored under dry conditions. Exposure to humidity produces a caked condition and accelerates reversion to orthophosphate. This results in poor flow and cak
- 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.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* [Go to Page]
- Table 1 Approximate bulk density of granular sodium tripolyphosphate
- 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
- Sec. 6.2 Packaging and Shipping
- Sec. 6.3 Affidavit of Compliance or Certified Analysis [Go to Page]
