1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 2245ISBN 0-7629-1277-4Below-Grade Vaults forFlammable Liquid StorageTanksUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED
2、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Below-Grade Vaults for Flammable Liquid Storage Tanks, UL 2245Second Edition, Dated December 28, 2006Sum
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19、e requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a fu
20、ture effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective d
21、ate, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Listing, Recognition, and F
22、ollow-Up Services afterthe effective date, and understanding of this should be signified in writing.Copyright 2006 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1-12 .December 28, 2006DECEMBER 28, 2006 UL 2245tr2UL COPYRIGHTED MATERI
23、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 28, 20061UL 2245Standard for Below-Grade Vaults for Flammable Liquid Storage TanksFirst Edition February, 1999Second EditionDecember 28, 2006An effective date included as a note immediately following certain
24、 requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmitta
25、l noticethat accompanies the latest set of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Standards Development System (CSDS) at http:/.ISBN 0-762
26、9-1277-4COPYRIGHT 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 28, 2006BELOW-GRADE VAULTS FOR FLAMMABLE LIQUID STORAGE TANKS - UL 22452No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
27、R FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 General 52.1 Components .52.2 Units of measurement .52.3 Undated references .53 Glossary .5CONSTRUCTION4 Below-Grade Vaults .65 Tank Securement .76 Monitoring and Leak Detection .77 Ventilation 78 Normal
28、and Emergency Venting 79 Lifting and Handling Means 7PERFORMANCE10 Buoyancy Test 811 Hydrostatic Load Test 812 External Pressure Test .913 Permeability Test for Secondary Containment Vaults .914 Evaluation of Nonmetallic Gasket and Seal Materials .915 Strength of Lift Fittings Test 10MANUFACTURING A
29、ND PRODUCTION TESTS16 Visual Inspection .1017 Vault Thickness 1018 Compressive Strength .1019 Records .10MARKINGS20 General 1121 Marking Method and Location 11INSTALLATION INSTRUCTIONS22 General 11DECEMBER 28, 2006 BELOW-GRADE VAULTS FOR FLAMMABLE LIQUID STORAGE TANKS - UL 2245 3UL COPYRIGHTED MATER
30、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover below-grade vaults intended for the storage of flammable or combustibleliquids in an aboveground atmospheric tank. Below-grade vaults are designed to contain oneaboveg
31、round tank which can be a compartment tank. Adjacent vaults may share a common wall. The lidof the vault may be at or below-grade.1.2 Below-grade vaults are constructed of a minimum of 6 inches (152.4 mm) of reinforced concrete orother equivalent noncombustible material and form a complete, liquid-t
32、ight enclosure that does not allowexternal ground water to permeate through the vault walls. Below-grade vaults can be evaluated assecondary containment vaults.1.3 Below-grade vaults covered by these requirements do not include an evaluation of components, suchas ventilation equipment, leak detectio
33、n and monitoring equipment, overfill protection equipment, andaccess ladders.1.4 Below-grade vaults are intended for installation and use in accordance with the manufacturersinstructions and the following fire codes: the Flammable and Combustible Liquids Code, NFPA 30, theAutomotive and Marine Servi
34、ce Station Code, NFPA 30A, and the Uniform Fire Code, Appendix II-J.1.5 Below-grade vaults covered by these requirements may be shipped in parts that require finalassembly in the field. When field assembly is required, detailed installation instructions shall be provided.1.6 These requirements do no
35、t cover seismic loading.1.7 A product that contains features, characteristics, components, materials, or systems new or differentfrom those covered by the requirements in this Standard, and that involves a risk of fire, electric shock, orinjury to persons shall be evaluated using the appropriate add
36、itional component and end-productrequirements to determine that the level of safety as originally anticipated by the intent of this Standard ismaintained. A product whose features, characteristics, components, materials, or systems conflict withspecific requirements or provisions of this Standard sh
37、all not be judged to comply with this Standard.Where appropriate, revision of requirements shall be proposed and adopted in conformance with themethods employed for development, revision, and implementation of this Standard.DECEMBER 28, 2006BELOW-GRADE VAULTS FOR FLAMMABLE LIQUID STORAGE TANKS - UL
38、22454UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this Standard shall comply withthe requirements for that component.2.1.2 A component need not c
39、omply with a specific requirement that:a) Involves a feature or characteristic not needed in the application of the component in theproduct covered by this Standard orb) Is superseded by a requirement in this Standard.2.1.3 A component shall be used in accordance with its recognized rating establish
40、ed for the intendedconditions of use.2.1.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascertain temperatures not exceeding specified limits, and sha
41、ll be used only under those specific conditionsfor which they have been recognized.2.2 Units of measurement2.2.1 When a value for measurement is followed by a value in other units in parentheses, the first statedvalue is the requirement.2.3 Undated references2.3.1 Any undated reference to a code or
42、standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.3 Glossary3.1 For the purpose of this standard the following definitions apply.3.2 ABOVEGROUND TANK FOR FLAMMABLE LIQUIDS A tank complying with the requirements int
43、he Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids, UL 142.3.3 ATMOSPHERIC TANK A storage tank that has been constructed to operate at pressures fromatmospheric through 1.0 psig (6.4 kPa) measured at the top of the tank.3.4 BELOW-GRADE VAULT A liquid-tight enclosure consis
44、ting of four walls, a floor, and a lid for thepurpose of containing a single flammable or combustible liquid aboveground atmospheric storage tank.A below-grade vault is not an occupancy and not intended to be occupied except for inspection, repair,or maintenance. The vault may be evaluated to provid
45、e secondary containment for the stored liquid.3.5 INTERSTITIAL SPACE The space between the primary tank and secondary containmentstructure that can be monitored for the presence of vapor or liquid.3.6 LIQUID-TIGHT Refers to an enclosure, in this case a vault, that does not allow external liquid,typi
46、cally water, to penetrate through to the enclosed area.DECEMBER 28, 2006 BELOW-GRADE VAULTS FOR FLAMMABLE LIQUID STORAGE TANKS - UL 2245 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.7 SECONDARY CONTAINMENT A structure that has permeabili
47、ty less than 1 107cm/sec (48grams m2/day) for the stored fluids, is external to and forms an interstitial space with the primary tank,and contains the entire contents of the primary tank in the event of a rupture.CONSTRUCTION4 Below-Grade Vaults4.1 A below-grade vault shall be constructed of a minim
48、um of 6 inches (152.4 mm) of reinforced concreteor other equivalent noncombustible material with the exception of joint seals, pipe and access-way seals,concrete linings, damp-proofing materials, and waterproofing materials. All materials that contact the tankcontents shall be compatible with the li
49、quids stored in the tanks.4.2 The vault shall be constructed to withstand anticipated loads including:a) Soil and hydrostatic loading on the floors, walls, and lid;b) Uplifting by groundwater or flooding; andc) Loads such as traffic and heavy equipment.The vault shall be constructed to withstand HS20-44 loading in accordance with the American Associationof State Highway and Transportation Officials, AASHTO, Standard for Highway Bridge Design. Vaultstructural drawings shall bear the stamp o
