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GB/T 38949-2020 English PDF

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US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 38949-2020: Determination of pore size for porous membranes - Standard particle method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38949-2020	259	Add to Cart	3 days	Determination of pore size for porous membranes - Standard particle method	Valid

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Basic data

Standard ID: GB/T 38949-2020 (GB/T38949-2020)
Description (Translated English): Determination of pore size for porous membranes - Standard particle method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J77
Classification of International Standard: 71.040.01
Word Count Estimation: 14,190
Date of Issue: 2020-06-02
Date of Implementation: 2021-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38949-2020: Determination of pore size for porous membranes - Standard particle method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of pore size for porous membranes - Standard particle method ICS 71.040.01 J77 National Standards of People's Republic of China Standard particle method for determination of pore size of porous membrane 2020-06-02 release 2021-04-01 Implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Test principle 2 5 Reagents and instruments 2 6 Test Step 2 7 Test report 3 Appendix A (informative appendix) National Grade 1 particle size reference material 4 Appendix B (informative appendix) National Grade II particle size reference material 5 Appendix C (Normative Appendix) Porous Membrane Test Device 6 Appendix D (informative appendix) Standard particle mass concentration test method 7 Appendix E (informative appendix) Test example of average pore size of porous membrane 8 Reference 9

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Separation Membrane Standardization Technical Committee (SAC/TC382). This standard was drafted by. Tianjin Institute of Seawater Desalination and Comprehensive Utilization, Ministry of Natural Resources, Hangzhou Annuo Filtration Equipment Co., Ltd., Sanda Membrane Technology (Xiamen) Co., Ltd., Tianjin University of Technology, Shandong Zhaojin Motian Co., Ltd., Yantai Jinzheng Environmental Protection Technology Co., Ltd., Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Suzhou Lisheng Water Purification Technology Co., Ltd., Tianjin Membrane Membrane Technology Co., Ltd., Ningbo Shuiyi Membrane Technology Development Co., Ltd., Shanghai Yiming Filtration Technology Co., Ltd., Zhejiang Jin Membrane Environmental Technology Co., Ltd., Tianjin Membrane Membrane Engineering Technology Limited company. The main drafters of this standard. Zhang Yanping, Pan Xianhui, Li Zongyu, Wang Xuliang, He Benqiao, Fan Yunshuang, Zhang Junwei, Chen Huiying, Wang Leyi, Li Yuebiao, Wang Xi, Chen Chen, Hu Xiaoyu, Shen Liqiang, Wu Changfei, Sun Wenting, Xu Yinong, Wang Hanyi, Ma Lanyun. Standard particle method for determination of pore size of porous membrane

1 Scope

This standard specifies the principles, reagents, instruments and methods for determining the pore size of porous membranes using the standard particle method. This standard is applicable to the determination of the average pore diameter of porous membranes such as hollow fiber, flat, and tube.

2 Normative references

The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB/T 6682 Analysis of laboratory water specifications and test methods GB/T 20103-2006 Technical terms of membrane separation

3 Terms and definitions

The terms and definitions defined in GB/T 20103-2006 and the following apply to this document. For ease of use, the following list is repeated Some terms and definitions in GB/T 20103-2006. 3.1 Membrane A thin barrier with certain physical or chemical characteristics on the surface, which makes a discontinuous interval between two adjacent fluid phases and affects the flow The penetration rate of the various components in the body. [GB/T 20103-2006, definition 2.1.1] 3.2 Porous membrane porousmembrane Membrane with porous and open structure. [GB/T 20103-2006, definition 2.1.19] 3.3 Pore diameter The nominal diameter of the membrane pores. [GB/T 20103-2006, definition 2.1.31] 3.4 Mean pore size The average value of the pore size of the membrane surface. [GB/T 20103-2006, definition 5.1.6] 3.5 Standard particle Spherical particles with uniform particle size distribution and stable physicochemical properties can be used as "gauges" for measuring the pore size of porous membranes. 3.6 Crossflowmembraneprocess The pressure pushes the feed material to flow parallel to the membrane surface (tangential flow), while the permeate flows vertically through the membrane (vertical flow) separation process. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 38949-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 38949-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 38949-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 38949-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.