Purchase your copy of ASTM E – 99() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. ASTM-E › Complete Document History Standard Test Method for Maximum Pore Diameter and Permeability of Rigid Porous Filters for Laboratory Use. E() Standard Test Method for Maximum Pore Diameter and Permeability of .. Active Standard ASTM E | Developed by Subcommittee: E

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Home Products Contacts Search. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. No further reproductions authorized. Both results are automatically displayed on the computer screen.

Enter your account email address to request a password reset: The maximum pore diameter is calculated from the surface tension of the test liquid and the applied pressure. If the test is to be repeated, shape. Other liquids which meet this criterion may be used. ASTM D recommends that the diffusers be tested when new and periodically thereafter, preferably after each use.

Apparatus responsibility of the user of this standard to establish appro- 5. Last previous edition E — This pore diameter is calculated from the surface tension of the test test method establishes a uniform designation for maximum liquid and the applied pressure.

However, the manometer is replaced by a high precision digital pressure controller. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service e-mail ; or through the ASTM website.

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ASTM E – pdf全文-调研报告-在线文档

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. ASTM grants you a license as follows: Content only available by subscription.

It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. You currently cannot view this content. Calculate the permeability as follows: For test sticks and candles a rubber stopper with a rubber tubing attached is suitable. A superscript epsilon indicates an editorial change asm the last revision or reapproval.

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Register for a trial account. It is the 5. They are applicable to filters made of sintered glass, ceramic, metal, or plastic.

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Foam Diffuser Certification Apparatus for ASTM D, D, E

But r radius of the capillary, under the conditions of the method it is more convenient to h height of the column of liquid, measure the diameter in micrometres and the pressure, pin surface tension of the liquid, millimetres of mercury. The uniformity of distribution of pores approaching the 1 This test method is under the jurisdiction of ASTM Committee E on maximum pore size may be observed 1e28 gradually increasing Laboratory Apparatus and is the direct responsibility of Subcommittee E In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise.

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ASTM E128 – 99(2011)

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Permeability is determined by measuring the flow of air through the filter when subjected to a pressure differential. Print 1 2 3 4 5 page sstarting from page current page. No other units of measurement are included in this standard. Clean dry compressed air shall be used. Remember me for one month. Apparatus that has been found satisfactory is illustrated in Fig.

This test method covers the determination of maximum pore diameter and permeability of rigid porous filters used in the laboratory for filtration or diffusion. Maximum pore diameter is determined by immersing the filter in a suitable test liquid and applying air pressure until the first bubble of air passes through the filter. This test method establishes a uniform designation for maximum pore diameter and also provides a means of detecting and measuring changes which occur through continued use.

Values for surface tension in Table 1 are for general guidance only and are approximate; surface tension of the liquid used should be determined. The electronic file may not be reproduced in any way. Summary of Test Method 1.