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AWWA C221-24 Fabricated Steel Mechanical Slip-Type Expansion Joints, 2024
- Foreword [Go to Page]
- I. Introduction [Go to Page]
- I.A. Background. Fabricated steel mechanical slip-type expansion joints have been used since the early 1900s to accommodate thermal movement in nonburied, aboveground pipelines, penstocks, and other conduits where expansion and contraction of more than 1/ [Go to Page]
- I.B. History. The first edition of ANSI/AWWA C221 was approved by the AWWA Board of Directors on Feb. 2, 1997. Subsequent revisions to ANSI/AWWA C221 were approved on Jan. 21, 2001; June 24, 2007; June 10, 2012; and Jan. 20, 2018. This edition was approve [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.1. Chlorine and Chloramine Degradation of Elastomers. The selection of materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Document [Go to Page]
- II.A.2. Gasket Degradation Study. A pipe gasket, having the hardness of a compressed elastomer with a large mass relative to the small exposed surface area, thus experiences minimal degradation. This was validated in a research paper reported in the Journ
- 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 items should be included 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. The major changes made to the standard in this edition 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 e-mail at standards@awwa.org.
- 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. 4.2 Design
- Sec. 4.3 Fabrication
- Sec. 4.4 Coatings
- Sec. 4.5 Installation Instructions
- SECTION 5: VERIFICATION
- Sec. 5.1 Inspection
- Sec. 5.2 Quality Assurance
- Sec. 5.3 Test Procedures
- Sec. 5.4 Nonconformance
- SECTION 6: DELIVERY
- Sec. 6.1 Marking
- Sec. 6.2 Packaging and Shipping
- Sec. 6.3 Affidavit of Compliance [Go to Page]
