GB/T 5249-2013 English PDF

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GB/T 5249-2013: Permeable sintered metal materials -- Determination of bubble test pore size
Status: Valid

GB/T 5249: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 5249-2013	134	Add to Cart	3 days	Permeable sintered metal materials -- Determination of bubble test pore size	Valid
GB/T 5249-1985	199	Add to Cart	2 days	Permeable sintered metal materials--Determination of bubble test pore size	Obsolete

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Basic data

Standard ID: GB/T 5249-2013 (GB/T5249-2013)
Description (Translated English): Permeable sintered metal materials -- Determination of bubble test pore size
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H16
Classification of International Standard: 77.160
Word Count Estimation: 7,789
Older Standard (superseded by this standard): GB/T 5249-1985
Quoted Standard: GB/T 5163-2006
Adopted Standard: ISO 4003-1977; IDT
Regulation (derived from): National Standards Bulletin 2013 No. 17
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard applies to: "bubble test" method for determining the permeability of sintered metal materials (filters, porous bearings, porous electrode and having Unicom hole other components) aperture. Bubble test is a porous metal material quality contr

GB/T 5249-2013: Permeable sintered metal materials -- Determination of bubble test pore size

---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.
Permeable sintered metal materials. Determination of bubble test pore size ICS 77.160 H16 National Standards of People's Republic of China Replacing GB/T 5249-1985 Permeable sintered metal materials Determination of bubble test pore size (ISO 4003. 1977, IDT) Issued on. 2013-09-06 2014-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 5249-1985 "permeable sintered metal materials - Determination of bubble test pore size." This standard compared with GB/T 5249-1985, the main changes are as follows. --- Only "bubble test pore size" test definition description, schematic original standard sample tube ring omitted; --- In Chapter 4 adds a comment, the bubble diameter and other properties of porous metal material will be described; --- Increase in Chapter 6 of the notes indicating the infiltration method of sample; test methods composite sample of coarse pore layer on a porous matrix and weight Complex testing requirements; Translation method used in this standard, ISO 4003 equivalent use. 1977 "permeable sintered metal materials - Determination of bubble test pore size." For ease of use, increased its chapters title. This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized. This standard is drafted by. Xi'an Pao PM limited liability company. The main drafters of this standard. collar Dong Feng, Zhang Han. This standard replaces the previous version of the release of case. --- GB/T 5249-1985. Permeable sintered metal materials Determination of bubble test pore size

1 Scope

This standard specifies the method called bubble test method is applicable to "bubble test" method for determining the permeability of sintered metal materials (filters , A porous bearings, and other components having a porous electrode Unicom hole) aperture. Bubble test is a test method for metallic porous material quality control, not to measure the level of metal porous materials, nor quasi Indeed determined porous metal material pore size and pore size distribution.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 5163-2006 Sintered metal materials (excluding carbide) Permeable sintered metal materials density, oil content, and open Determination of rates. (ISO 2738.1999, IDT) Principle 3 After wetting with the test liquid sample, the sample sealed with the liquid immersion test specimen. From the other side of the sample is passed through a gas (usually empty Gas), and then gradually increase the pressure to observe the surface of the sample, when the first bubbles appear, measured pressure values. According to this pressure and test liquid The liquid to the surface of the specimen height and other parameters can be calculated equivalent bubble test pore size of the sample.

4 bubble test pore size

Bubble test pore size is equivalent to the maximum diameter of the capillary sample from the first bubble pressure corresponding calculations. The first bubble will have The maximum pore throat in the formation, the throat is the narrowest part of the hole. Bubble test test test aperture schematic shown in Figure 1. Assume that the bubble in the equivalent cylindrical capillary tube filled with the ends of the test liquid is formed, the equivalent diameter of the cylindrical capillary formation of bubbles Relations between the pressure using the formula (1). d = 4γΔp (1) Where. d --- sample capillary equivalent diameter in meters (m); --- [Gamma] the surface tension of the test fluid in Newtons per meter (N/m); Δp --- in the static state, the pressure difference on the sample unit is Pascal (Pa). Δp by the formula (2). Δp = pg-p1 (2) Where. --- PG test gas pressure in Pascals (Pa); p1 --- test pressure of the liquid in the plane of bubble formation, the unit is Pascal (Pa). ......

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