ASTM D7002-2015 red 8746 Standard Practice for Electrical Leak Location on Exposed Geomembranes Using the Water Puddle Method《采用水搅拌法的暴露土工薄膜上电泄漏位置的标准实践规程》.pdf
《ASTM D7002-2015 red 8746 Standard Practice for Electrical Leak Location on Exposed Geomembranes Using the Water Puddle Method《采用水搅拌法的暴露土工薄膜上电泄漏位置的标准实践规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7002-2015 red 8746 Standard Practice for Electrical Leak Location on Exposed Geomembranes Using the Water Puddle Method《采用水搅拌法的暴露土工薄膜上电泄漏位置的标准实践规程》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7002 10D7002 15Standard Practice forElectrical Leak Location on Exposed Geomembranes Usingthe Water Puddle SystemMethod1This standard is issued under the fixed designation D7002; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice, practice is a performance-based standard for electrical methods, covers detecting
3、an electrical method forlocating leaks in exposed geomembranes. For clarity, this practice uses the term “leak” to mean holes, punctures, tears, knife cuts,seam defects, cracks, and similar breaches in an installed geomembrane (as defined in 3.2.5).1.2 This practice can be used for geomembranes inst
4、alled in basins, ponds, tanks, ore and waste pads, landfill cells, landfill caps,canals, and other containment facilities. It is applicable for geomembranes made of materials such as polyethylene, polypropylene,polyvinyl chloride, chlorosulfonated polyethylene, bituminous geomembrane, and any other
5、electrically insulating materials. Thispractice may not be is best applicable for locating geomembrane leaks where the proper preparations have not been made duringthe construction of the facility.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are inc
6、luded in this standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior t
7、o use.2. Referenced Documents2.1 ASTM Standards:2D4439 Terminology for GeosyntheticsD6747 Guide for Selection of Techniques for Electrical Leak Location of Leaks in GeomembranesD7703 Practice for Electrical Leak Location on Exposed Geomembranes Using the Water Lance Method1 This practice is under th
8、e jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes.Current edition approved July 1, 2010Jan. 1, 2015. Published September 2010January 2015. Originally approved in 2003. Last previous edition approved in 20032010as D700203.D70
9、0210. DOI: 10.1520/D7002-10.10.1520/D7002-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is
10、 not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropr
11、iate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D7953 Practice for Electrical Leak Location on Exposed Geomembra
12、nes Using the Arc Testing Method3. Terminology3.1 Definitions:3.1.1 For general definitions used in this practice, refer to Terminology D4439.3.2 Definitions of Terms Specific to This Standard:3.2.1 artificial leak, nan electrical simulation of a leak in a geomembrane.3.2.2 conductive-backed geomemb
13、rane, na specialty geomembrane manufactured using coextrusion technology featuring aninsulating layer in intimate contact with a conductive layer.3.2.3 current, nthe flow of electricity or the flow of electric charge.3.2.4 electrical leak location, na method which uses electrical current or electric
14、al potential to detect and locate leaks.3.2.4 electrodes, nthe conductive plate that is placed in earth ground or in the material under the geomembrane or aconductive structure, such as a copper manifold, that is placed in the water puddle on the geomembrane.3.2.5 leak, nfor the purposes of this doc
15、ument, a leak is any unintended opening, perforation, breach, slit, tear, puncture,crack, or seam breach. Significant amounts of liquids or solids may or may not flow through a leak. Scratches, gouges, dents, orother aberrations that do not completely penetrate the geomembrane are not considered to
16、be leaks. Leaks Types of leaks detectedduring surveys have been grouped into five categories:include, but are not limited to: burns, circular holes, linear cuts, seamdefects, tears, punctures, and material defects.3.2.5.1 burned through zonesvoids created by melting polymer during welding.3.2.5.2 ho
17、lesround shaped voids with downward or upward protruding rims.3.2.5.3 linear cutslinear voids with neat close edges.3.2.5.4 seam defectsarea of partial or total separation between sheets.3.2.5.5 tearslinear or areal voids with irregular edge borders.3.2.6 leak detection sensitivity, nthe smallest le
18、ak that the leak location equipment and survey methodology are capable ofdetecting under a given set of conditions. The leak detection sensitivity specification is usually stated as a diameter of the smallestleak that can likely be reliably detected.3.2.7 poor contact condition, nfor the purposes of
19、 this practice, a poor contact condition means that a leak is not in intimatecontact with the conductive layer above or underneath the geomembrane to be tested. This occurs on a wrinkle or wave, under theoverlap flap of a fusion weld, in an area of liner bridging and in an area where there is a subg
20、rade depression or rut.3.2.8 probe, nfor the purposes of this practice, any conductive structure that is attached to a power source.3.2.9 squeegee, nfor the purposes of this document, a squeegee is a device used to contain and push water on top of anexposed geomembrane. It may consist of a handle an
21、d a transverse piece at one end set with a strip of leather or rubber.rubber,or a roller apparatus.3.2.10 water puddle, na small pool of water placed on the geomembrane to create a conduit for current to flow through anyleaks.4. Summary of Practice4.1 Principle of Electrical Leak Location Method Usi
22、ng the Water Puddle System:4.1.1 The principle of the electrical leak location method is to place a voltage across a geomembrane and then locate areas whereelectrical current flows through discontinuities in the geomembrane and at seams.4.1.2 Fig. 1 shows a diagram of the electrical leak location me
23、thod of the water puddle system for exposed geomembranes. Oneoutput of an electrical excitation power supply is connected to an electrode placed in a water puddle created on top of thegeomembrane. The other output of the power supply is connected to an electrode placed in electrically conductive mat
24、erial underthe geomembrane.4.1.3 Measurements are made using an electrical current measurement system, the magnitude of the current being related to thesize of the leak. An electronic assembly is usually used to produce an audio tone whose frequency is proportional to the currentflow.4.2 Leak Locati
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD70022015RED8746STANDARDPRACTICEFORELECTRICALLEAKLOCATIONONEXPOSEDGEOMEMBRANESUSINGTHEWATERPUDDLEMETHOD

链接地址:http://www.mydoc123.com/p-524215.html