ImageVerifierCode 换一换
格式:PDF , 页数:2 ,大小:51.07KB ,
资源ID:518478      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-518478.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM D4948-1989(2016) Standard Test Method for Determination of the Upper Layer Separated from a Viscous Liquid《测定粘性液体分离的上层的标准试验方法》.pdf)为本站会员(medalangle361)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM D4948-1989(2016) Standard Test Method for Determination of the Upper Layer Separated from a Viscous Liquid《测定粘性液体分离的上层的标准试验方法》.pdf

1、Designation: D4948 89 (Reapproved 2012)D4948 89 (Reapproved 2016)Standard Test Method forDetermination of the Upper Layer Separated from a ViscousLiquid1This standard is issued under the fixed designation D4948; the number immediately following the designation indicates the year oforiginal adoption

2、or, in the case of 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 test method covers the determination of the amount of liquid separated a

3、s an upper layer in a 24-h period from viscoussolutions or dispersions that contain dispersed solids such as paints, enamels, pigmented lacquers, adhesives, polishes, and othersimilar materials.NOTE 1The amount of clear liquid that separates during this test is one of the criteria in the United Nati

4、ons Recommendations on the Transportationof Dangerous Goods2 for the placement of flammable viscous liquids into packing groups related to flash points (See 4.1).1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.3 This st

5、andard 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 to use.2. Referenced Documents2.1 A

6、STM Standards:3D3925 Practice for Sampling Liquid Paints and Related Pigmented Coatings3. Summary of Test Method3.1 A measured amount of the material to be tested is placed in a graduated cylinder and allowed to stand undisturbed for 24h. The volume percent of the separated top layer is then determi

7、ned.4. Significance and Use4.1 The United Nations Committee of Experts on the Transport of Dangerous Goods in their recommended regulations placematerials having a flash point below 23C (73.5F) in Packing Group II. However, if viscous substances such as paint and relatedcoatings, adhesives, polishes

8、, etc., meet certain requirements, they can be placed in Group III along with materials having a flashpoint between 23 and 60.5C (73.5 and 140F). One of the requirements is that less than 3 % of clear liquid separates from thebulk of the material when subjected to this test method.4.2 At the present

9、 time most international regulatory bodies such as the International Civil Aviation Organization (ICAO) andthe International Maritime Organization (IMO) use the U.N. Recommendations. It is anticipated that most national transportationregulatory bodies will adopt the U.N. Recommendations as their reg

10、ulations for control of transportation of hazardous materials.At present the United States permits the transshipment of hazardous materials through the United States to other countries underregulations of the IMO and ICAO.5. Apparatus5.1 Graduated Cylinder, 100-mL, TC, glass-stoppered, 295-mm total

11、height and 29-mm inside diameter.5.2 Constant Temperature Cabinet or Room, at 23 6 2C (73.5 6 3.5F).1 This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysi

12、s of Paints and Paint Materials.Current edition approved June 1, 2012Dec. 1, 2016. Published July 2012December 2016. Originally approved in 1989. Last previous edition approved in 20062012 asD4948 - 89 (2006)D4948 89 (2012). DOI: 10.1520/D4948-89R12.10.1520/D4948-89R16.2 Transport of Dangerous Goods

13、: Recommendations of the Committee of Experts on the Transport of Dangerous Goods, United Nations; 33rdrd ed., New York, 1984.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information,

14、refer to the standardsstandards Document Summary page on the ASTM website.This document is 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 d

15、epict all changes accurately, ASTM recommends that users consult prior editions as appropriate. 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

16、19428-2959. United States16. Sampling6.1 Obtain a uniform quart sample of the material using standard methods for sampling in accordance with Practice D3925.7. Conditioning7.1 Store the sample or a representative portion at a constant temperature of 23 6 2C (73.5 6 3.5F) until the sample reachesa un

17、iform temperature of 23C (73.5F).8. Procedure8.1 Thoroughly stir the sample to obtain uniform consistency and, in the case of materials containing particles, uniformdispersion of these particles.8.2 Immediately pour 100 mL of the sample into the graduated cylinder. Insert a stopper, then leave the c

18、ylinder undisturbedat 23C (73.5 6 3.5F) for 24 h.8.3 After 24 h, measure the volume of any upper separated layer and determine the percent of the separated layer compared tothe total volume of the specimen.9. Calculation9.1 Calculate the volume percent of the clear upper liquid layer Pc as follows:P

19、c5Vc/Vm!3100 (1)where:Vc = volume of the clear upper liquid layer, mL, andVm = total volume of the 100-mL specimen, mL.where:Vc = volume of the clear upper liquid layer, mL, andVm = total volume of the 100-mL specimen, mL.10. Report10.1 Report the volume percent of the separated clear liquid to with

20、in 0.5 %.11. Precision and Bias11.1 The precision of this test method will be determined.11.2 Bias cannot be determined since no standards are available.12. Keywords12.1 upper layer; viscous liquidASTM International takes no position respecting the validity of any patent rights asserted in connectio

21、n with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible

22、technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful conside

23、ration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr

24、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 89 (2016)2

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1