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AWWA D121-24 Bolted Aboveground Thermosetting Fiberglass-Reinforced Plastic Panel-Type Tanks for Water Storage, 2024
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. This standard covers bolted aboveground thermosetting fiberglass-reinforced plastic panel-type (BATFRPP) tanks for water storage and is based on more than two decades of accumulated knowledge and experience from installations worldwide, a [Go to Page]
- I.B. History. In June 2007, the Standards Council authorized development of a new standard and assigned it to Standards Committee 370, Thermosetting Fiberglass-Reinforced Plastic Tanks. A subcommittee was formed to prepare this standard. Applicable public [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. Purchase. When tanks are purchased using this standard, the purchaser must specify certain basic requirements. The purchaser may desire to modify, delete, or amplify sections of this standard to suit special conditions. It is strongly recommended th [Go to Page]
- II.B. Design and Construction. The details of design and construction covered by this standard are minimum requirements. A tank cannot be represented as adhering to the provisions of ANSI/AWWA D121 if it does not meet the minimum requirements of this stan [Go to Page]
- II.C. Manufacturing Method. Tanks covered by this standard are typically manufactured by compression molding with sheet molding compound (SMC) using the hot press method. Tanks requiring no internal or external coating and bolted construction have a long
- II.D. Foundation. The tank foundation is one of the more important aspects of tank design. Detailed requirements for tank foundations are covered in Sec. 5.8 of this standard. This standard does not require the manufacturer or constructor to be responsibl
- II.E. Tank Overflow Discharge. A drainage inlet structure or suitable erosion protection should be provided to receive the discharge from the tank overflow. The overflow should not be connected directly to a sewer or a storm drain without an air break.
- II.F. Annual Inspection and Maintenance. Inspection and maintenance are important if maximum tank life is to be attained. Inspections should be performed annually.
- II.G. Disinfection Procedures. This standard does not cover tank disinfection procedures. ANSI/AWWA C562, Standard for Disinfection of Water-Storage Facilities, should be consulted for recommended procedures for disinfection of water-storage facilities. I
- II.H. Recommended Items to Be Furnished by the Purchaser and Manufacturer. The following recommendations on items to be furnished by both the purchaser and the manufacturer are considered good practice but are not requirements of ANSI/AWWA D121.
- II.I. 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. Documented [Go to Page]
- 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.
- III.A. Purchaser Options and Alternatives. The following information should be furnished by the purchaser when taking bids for a tank:
- III.B. Information to Be Furnished by the Manufacturer or Constructor. The following information shall be furnished by the manufacturer or constructor for a tank:
- III.C. Items for Consideration by the Purchaser. The design, construction, and final placement of a storage tank into service require cooperation between the purchaser, manufacturer, and constructor of the tank. Various practices are used to ensure succes
- III.D. Modification to Standard. Any modification to the provisions, definitions, or terminology in this standard must be provided in the purchaser’s documents. [Go to Page]
- 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 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.
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- Sec. 1.4 Drawings to Be Furnished
- SECTION 2: REFERENCES
- SECTION 3: DEFINITIONS
- SECTION 4: MATERIALS
- Sec. 4.1 General
- Sec. 4.2 Bolts for Panel Connections
- Sec. 4.3 Foundation-Reinforcing Steel
- Sec. 4.4 FRP Panels
- Sec. 4.5 Structural Shapes
- Sec. 4.6 Castings
- Sec. 4.7 Forgings
- Sec. 4.8 Galvanized Coatings
- Sec. 4.9 Structural Bolts
- Sec. 4.10 Weld Electrodes
- Sec. 4.11 Gaskets and Patches
- SECTION 5: TANK DESIGN
- Sec. 5.1 Design Methodology
- Sec. 5.2 Design Loads
- Sec. 5.3 Seismic Design
- Sec. 5.4 Strength and Resistance of FRP Panels and Connections
- Sec. 5.5 Strength of Welds for Steel Components
- Sec. 5.6 Foundation Anchor Bolts Between Concrete Beams and Steel Footings
- Sec. 5.7 Roof Panels
- Sec. 5.8 Foundation Design
- SECTION 6: SIZING OF TANKS
- SECTION 7: ACCESSORIES FOR TANKS
- Sec. 7.1 Manways
- Sec. 7.2 Pipe Connections
- Sec. 7.3 Overflow
- Sec. 7.4 Ladders
- Sec. 7.5 Safety Devices
- Sec. 7.6 Vents
- Sec. 7.7 Additional Accessories and Exceptions
- SECTION 8: FABRICATION
- Sec. 8.1 Compression Molding
- Sec. 8.2 Steel Footings—Welded Work
- Sec. 8.3 Assembly and Subassemblies
- Sec. 8.4 Welds
- Sec. 8.5 Tolerances
- Sec. 8.6 Shipping
- Sec. 8.7 Quality Standards and Control
- SECTION 9: CONSTRUCTION
- Sec. 9.1 General
- Sec. 9.2 Foundation Construction
- Sec. 9.3 Anchor Bolts
- Sec. 9.4 Anchor Bolt Placement and Tolerance
- Sec. 9.5 Steel Footing
- Sec. 9.6 Types of Joint
- Sec. 9.7 Bolting
- Sec. 9.8 Bolt Tightening Requirements
- Sec. 9.9 Gaskets and Patches
- Sec. 9.10 Cleanup
- Sec. 9.11 Marking
- Sec. 9.12 Protection
- SECTION 10: INSPECTION AND TESTING
- Sec. 10.1 FRP Panel Damage
- Sec. 10.2 Testing
- Sec. 10.3 Disposal of Test Water
- Sec. 10.4 Repair of Leaks
- Sec. 10.5 Disinfecting
- Sec. 10.6 Inspection and Maintenance
- SECTION 11: VERIFICATION
- Sec. 11.1 Basis for Rejection
- SECTION 12: DELIVERY
- Sec. 12.1 Affidavit of Compliance [Go to Page]
- APPENDIX B [Go to Page]
- Seismic Analysis Example
- Metric (SI) Equivalents [Go to Page]
