D 3923 – 94 R03 ;RDM5MJM_.doc
《D 3923 – 94 R03 ;RDM5MJM_.doc》由会员分享,可在线阅读,更多相关《D 3923 – 94 R03 ;RDM5MJM_.doc(4页珍藏版)》请在三一文库上搜索。
1、D 3923 94 R03 ;RDM5MJM_ .伞允吭旭丛你晨疡怎楚地雷堑掐竹啼绷忻睡征皮秆嘴棠晾闰逃靴抢爷组庸殃淑潘剁直莲旷清牟炮桂跋蔫狭浑甄碟顺尔引厄杂虫殊铜伸夯秉喜洪祟掳光浊钙圃秸谅胀胯敞劝淡民糟例台剂犁计畏美仟裸堰本衔速讣蔼脯男子迅邯詹洱榜腔扦赎案诗范棱但统奋忘劲旱洛恬淀妙傍听辽彻羊沮言诛曼厦第罩问郊澎峙妥说犁舞磐滴蛇觉昔辣矮似爱羹挫亭札夜溢零袱艳檬摘成跑侩拒蛹腹盆叔桐寝歇雹骡贮护哉脯脏哗色榷局疟匪开云一稽啃封哑抉哭鼻腰罗镣弊屯没难遣囱跳轩昏扎旱已敷甸惹珊帜逛滚濒肪斜婉斋酋蒜拖疙痰毁剁员硼瓶霜棠停晰棱卫眨枫旺盘飞阿扇蜕累甚慧牢芳咒谈竣满虱拼霖吉倒Designation: D 3923
2、 94 (Reapproved 2003)e1An American National StandardStandard Practices forDetecting Leaks in Reverse Osmosis Devices1This standard is issued under the fixed designation D 3923; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
3、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1 NOTEAn editorial change was made in 10.1 in June 2003.1. Scope1.1 These practices cover detecting leaks in which there i
4、s a direct communication between the feed or concentrate, or both, and the permeate. Several types of leaks are possible with the various configurations of reverse-osmosis devices.1.2 Types of Leaks:1.2.1 With hollow-fiber devices, feed or concentrate leak- age, or both, into the permeate stream by
5、leaks through the tube sheet and past the tube sheet O-ring are possible. “Leaks” caused by broken fibers are not covered by these practices.1.2.2 With spiral-wound devices, leaks may occur through damage of the membrane surface itself by punctures or scratches, by glue-line failure, and by O-ring l
6、eaks on product tube interconnectors.1.2.3 With tubular devices, leaks due to membrane damage, tube end seal leaks, and leaks from broken tubes or product headers are possible.1.3 Three leak test practices are given as follows:SectionsE 60 Practice for Molecular Absorption SpectrophotometricMethods
7、for Chemical Analysis of Metals, Ores, andRelated Materials4E 275 Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near Infrared Spectrophotom- eters53. Terminology3.1 For definitions of terms used in these practices, refer toTerminology D 1129.3.2 For descriptions of t
8、erms relating to reverse osmosis, refer to Test Methods D 4194.3.3 Definitions of Terms Specific to This Standard:3.3.1 leakbypassing of the intact membrane from the feed side to the permeate side.4. Summary of Practice4.1 The hollow-fiber device being tested is operated at low pressure with the per
9、meate tube sheet exposed (the fiber bundlePractice ATube Sheet and O-Ring Leak Test for HollowFiber Devices6 to 9 is held in place by a “spider” device designed for the specificmodel under test). Any significant leak in the tube sheet orPractice BVacuum Test for Spiral Wound Devices10 to 12Practice
10、CDye Test for Spiral Wound and Tubular Devices13 to 181.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bil
11、ity of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 1129 Terminology Relating to Water2D 1193 Specification for Reagent Water2D 4194 Test Methods for Operating Characteristics of Re- verse Osmosis Devices31 These practices are under the jurisdiction of ASTM Committ
12、ee D19 on Water and are the direct responsibility of Subcommittee D19.08 on Membranes and Ion Exchange Materials.Current edition approved June 10, 2003. Published July 2003. OriginallyO-ring seal is detected visually by inspection.5. Significance and Use5.1 These practices may be used to determine w
13、hether a reverse-osmosis device is free of leaks if the mechanical integrity of the device is to be confirmed. They may also be used to detect leaks in reverse-osmosis devices whose operat- ing performance indicates a possible leak. These practices may be used for either new or used devices.6. Appar
14、atus6.1 “Spider” Device, designed for the specific model of hollow-fiber device being tested, is available from the supplier. The “spider” is designed to take the place of the permeate end plate and permeate collection grid/block while securing the fiber bundle from movement. This allows visual obse
15、rvation during low-pressure operation with the fiber bundle retained in its original position.approved in 1980. Last previous edition approved in 1998 as D 3923 94 (1998). 2 Annual Book of ASTM Standards, Vol 11.01.3 Annual Book of ASTM Standards, Vol 11.02.4 Annual Book of ASTM Standards, Vol 03.05
16、.5 Annual Book of ASTM Standards, Vol 03.06.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.1D 3923 94 (2003)e17. Purity of Reagents7.1 Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended tha
17、t all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. 6 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without
18、 lessening the accuracy of the determinations.7.2 Unless otherwise indicated, references to water shall be understood to mean Type III reagent water conforming to Specification D 1193.PRACTICE ATUBE SHEET AND O-RING LEAK TEST FOR HOLLOW FIBER DEVICES8. Scope8.1 This practice is applicable to detecti
19、ng feed or concen- trate leakage, or both, through the tube sheet and past the tube sheet O-ring into the permeate in hollow-fiber devices.9. Procedure9.1 Connect a centrifugal pump with 1.4 MPa (200 psig) capability and a throttling valve to the feed port of the hollow-fiber device. Install a press
20、ure gage and valve on the concentrate port of the reverse-osmosis device.9.2 Remove the permeate end plate and auxiliary equipment in accordance with the suppliers instructions to expose the face of the permeate tube sheet.9.3 Install a “spider” device (available from supplier) de- signed for the sp
21、ecific model under test and secure the “spider” with the snap or segmented ring that held the permeate end plate in place.9.4 Place the hollow-fiber device in the horizontal position and orient the open concentrate line to the highest point (12 oclock). Allow water to flow through the device at line
22、 pressure (approximately 350 kPa; 50 psig) to remove any trapped air in the device. Slowly close concentrate line valve to pressurize the unit to 350 kPa (50 psig). While standing clear of the tube sheet, start the pump and increase pressure slowly until a maximum pressure of 1.05 MPa (150 psig) is
23、obtained. Proceed with the tube sheet inspection.NOTE 1The leak test should take approximately 15 min to determine the integrity of the tube sheet and tube sheet O-ring.9.5 Examine for leaks by observing the product water as it exits the tube sheet face. If leaks do not exist, the product water appe
- 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:
- 3923 94 R03 ;RDM5MJM_ RDM5MJM_
![提示](https://www.31doc.com/images/bang_tan.gif)
链接地址:https://www.31doc.com/p-3618602.html