1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 971ISBN 1-55989-910-7Nonmetallic UndergroundPiping For Flammable LiquidsUL 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 Nonmetallic Underground Piping For Flammable Liquids, UL 971First Edition, Dated October 30, 1995Revision
3、s: This Standard contains revisions through and including March 2, 2006.Summary of TopicsThese revisions are being issued to correct the requirements that were published on February22, 2006. Corrections to paragraphs 15A.12 and 15A.13 are being published to delete thereferences to reverse extrapolat
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22、 practical internal use.The 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
23、revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard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 sp
24、ecified future effective date, 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 L
25、isting and Follow-Up Services after the effectivedate, and understanding of this should be signified in writing.Copyright 2006 Underwriters Laboratories Inc.MARCH 2, 2006 UL 971tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis Standard c
26、onsists of pages dated as shown in the following checklist:Page Date1.March 2, 20062-4February 22, 20065-14 January 2, 200415August 16, 200516-18 .January 2, 200419August 16, 200520-20B February 22, 200621August 16, 200522January 2, 200423-24 .March 2, 200624A-24B.February 22, 200625August 16, 20052
27、6-30 .January 2, 2004SR1-SR10 .January 2, 2004MARCH 2, 2006 UL 971 tr3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 2, 2006 UL 971tr4No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WIT
28、HOUT PERMISSION FROM ULOCTOBER 30, 1995(Title Page Reprinted: March 2, 2006)1UL 971Standard for Nonmetallic Underground Piping For Flammable LiquidsFirst EditionOctober 30, 1995An effective date included as a note immediately following certain requirementsis one established by Underwriters Laborator
29、ies 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 transmittal noticethat accompanies the latest set of revised requir
30、ements.ISBN 1-55989-910-7COPYRIGHT 1995, 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 22, 2006NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 9712No Text on This PageUL COPYRIGHTED MATER
31、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 General 62.1 Units of measurement .62.2 Undated references .62.3 Glossary 6CONSTRUCTION2A General 8PERFORMANCE3 General 94 Cyclic Pressure Test Primary Piping 114A Short Term Pressure
32、 Tests 114A.1 General .114A.2 Leakage test 124A.3 Hydrostatic test 124A.4 Breakdown test 125 Leakage Test Primary and Secondary Containment Piping 135A Long Term Pressure Tests 135A.1 General .135A.2 Sustained pressure test .135A.3 Cyclic pressure test 146 Hydrostatic Pressure Strength Test Primary
33、Piping .146A Vacuum Tests 146A.1 General .146A.2 Static vacuum test .146A.3 Cyclic vacuum test .157 Fitting Torque Test .158 Fitting Bending Test 159 Pipe Bending Test .1610 Drop Test 1611 Drop Test After Conditioning .1712 Ball Impact Test 1713 Ball Impact Test After Conditioning .1814 Crush-Streng
34、th Test Primary and Secondary Containment Piping .1814A Pipe Burial Tests 1814A.1 General 1814A.2 Pull strength test 1914A.3 Puncture resistance test .1914A.4 Crush resistance test 2015 Immersion Tests Primary and Secondary Containment Piping 2015A Long Term Compatibility Test .2016 Air-Oven-Aging T
35、est Primary and Secondary Containment Piping .2416A Interstitial Communication Test 2416B UV Compatibility Test .24A16C Nonmetallic Fitting Stress Crack Test 25FEBRUARY 22, 2006 NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 971 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
36、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL16D Metallic Fitting Stress Crack Test 2517 Permeation Test 25MANUFACTURING AND PRODUCTION TESTS18 General 2619 Leakage Test 27MARKING20 General 27INSTRUCTIONS21 General 29FEBRUARY 22, 2006NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 9712BU
37、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 22, 2006 NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 971 3No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSI
38、ON FROM ULThis page intentionally left blank.FEBRUARY 22, 2006NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 9714UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover primary carrier, second
39、ary containment, integral primary/secondarycontainment, normal vent and vapor recovery, nonmetallic pipe, fittings, and systems (products) intendedfor use underground in the distribution of petroleum-base flammable and combustible liquids, alcohols,and alcohol-blended fuels as identified in this sta
40、ndard.Revised 1.1 effective July 1, 20051.2 The piping covered by these requirements is intended to be installed and used in accordance with theFlammable and Combustible Liquids Code, NFPA 30 and the Standard for Automotive and Marine ServiceStation Code, NFPA 30A.1.3 These requirements cover nonmet
41、allic thermoplastic (flexible) and thermoset (rigid) plastic piping withmanufacturer-supplied fittings for underground use only. The products covered by this standard havebeen evaluated for assembly in normal soil applications by qualified persons in accordance with themanufacturers instructions.Rev
42、ised 1.3 effective July 1, 20041.3.1 The products covered by this standard have not been evaluated for applications in sumps morethan 12 inches (30.5 cm) from sump wall, as connector pipe (between underground pipe and dispensingdevice), aboveground or marine use, or other applications exceeding ambi
43、ent temperatures of 75F(23C).Added 1.3.1 effective July 1, 20051.4 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 or of electric shockor injury to persons s
44、hall be evaluated using appropriate additional component and end-productrequirements to maintain the level of safety as originally anticipated by the intent of this standard. Aproduct whose features, characteristics, components, materials, or systems conflict with specificrequirements or provisions
45、of this standard does not comply with this standard. Revision of requirementsshall be proposed and adopted in conformance with the methods employed for development, revision, andimplementation of this standard.JANUARY 2, 2004 NONMETALLIC UNDERGROUND PIPING FOR FLAMMABLE LIQUIDS - UL 971 5UL COPYRIGH
46、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Units of measurement2.1.1 If a value for measurement is followed by a value in other units in parentheses, the second valueshall be only approximate. The first stated value is the requirement.2
47、.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.2.3 Glossary2.3.1 OPEN SECONDARY CONTAINMENT PIPING SYSTEM A secondary piping system with endsnormally
48、 open at the sump and a minimum rated pressure of 5.0 psig (35 kPa).Revised 2.3.1 effective July 1, 20042.3.2 CLOSED SECONDARY CONTAINMENT PIPING SYSTEM A secondary piping system withends normally closed at the tank and sump with a minimum rated pressure of 50 psig (350 kPa).Revised 2.3.2 effective
49、July 1, 20042.3.3 BARRIER LINER The thin inner or outer layer of a composite pipe that contains internal fuels,provides permeation resistance, and protects the outer structural pipe wall from exposure to fuels orexternal fluids.Added 2.3.3 effective July 1, 20042.3.4 CHASE PIPE An underground pipe that is used to route primary carrier, secondarycontainment, or integral primary/secondary pipe between storage tanks and containment sumps.Typically used to extract pipe without excavation
