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eLibrary > AWWA B512-23 Sulfur Dioxide >

AWWA B512-23 Sulfur Dioxide, 2023

Foreword [Go to Page]
I. Introduction. [Go to Page]
I.A. Background. Sulfur dioxide (SO2), or sulfurous oxide, is a colorless, nonflammable, pungent, suffocating gas. This reducing agent is widely used to remove chlorine and other oxidants from water. Sulfur dioxide is corrosive to mild steel if moisture i [Go to Page]
I.B. History. The first edition of ANSI/AWWA B512, Sulfur Dioxide, was developed by the AWWA Standards Committee on Taste and Odor Control Chemicals and approved by the AWWA Board of Directors on Jan. 27, 1991, with an effective date of June 1, 1991. Subs [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. Safety. Sulfur dioxide is a colorless, nonflammable, pungent gas or liquid with a vapor density of 2.26. Sulfur dioxide reacts with water or free moisture to form sulfurous acid, which is corrosive.
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 to the provisions, definitions, or terminology in this standard must be provided by the purchaser.
IV. Major Revisions. Major revisions made to the standard in this edition include the following:
V. Comments. If you have any comments or questions about this standard, please contact 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 Laboratory Examination
Sec. 5.3 Test Procedures for Sulfur Dioxide, Nonvolatile Residue, Moisture, and Heavy Metals
Sec. 5.4 Basis for Shipment and Acceptance
Sec. 5.5 Notice of Nonconformance
SECTION 6: DELIVERY
Sec. 6.1 Marking*
Sec. 6.2 Packaging and Shipping
Sec. 6.3 Affidavit of Compliance [Go to Page]

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