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BS 1902-10.2:1994:2003 Edition

BS 1902-10.2:1994:2003 Edition

$102.76

Methods of testing refractory materials. Investment casting shell mould systems – Determination of permeability and standard air flow capacity at elevated temperatures – Section 10.2: Determination of permeability and standard air flow capacity at elevated temperatures

Published By Publication Date Number of Pages
BSI 2003 20
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This Section of BS 1902-10 describes a method for determining the standard air flow capacity of investment casting shell moulds, and the inherent permeability of the shell material, at elevated temperatures.

PDF Catalog

PDF Pages PDF Title
1 BRITISH STANDARD
2 Committees responsible for this British Standard
3 Contents
5 1 Scope
2 Definitions
permeability
air flow capacity
standard air flow capacity (SAF)
3 Principle
4 Apparatus
4.1 Test equipment
4.2 Air supply
4.3 Pressure regulator
4.4 Thermal mass flow sensor
4.5 Pressure sensor
6 4.6 Test piece temperature indication
4.7 Programmable control furnace
Figure 1 – Configuration of test equipment
7 Figure 2 – Pressure-tight thermocouple/T-piece adaptor for thermocouple entry into air stream
8 Figure 3 – Detail of T-piece
9 Figure 4 – Location of test piece
10 5 Number and form of test pieces
5.1 Number
5.2 Test piece former
5.3 Shelling
5.4 Burn-out
11 Figure 5 – Sample former
6 Test procedure
Table 1 – Test procedure: possible options
7 Shell characterization: procedure A
7.1 Measurement of shell test pieces
7.2 Connecting test piece to apparatus and performing leak checks
12 Figure 6 – Four sample diameter measurement points
7.3 Furnace controller
13 7.4 Test pressure
7.5 Recording data
8 Production/quality control procedure on a fired shell: procedure B
9 Production/quality control procedure on an unfired shell: procedure C
14 10 Calculation of results
15 11 Test report
16 Annex A (informative) Alternative calculation methods
Annex B (informative) Convention for tabular presentation of results
Table B.1 – Temperature ramp phase
17 Table B.2 – Temperature dwell phase at 1 200 °C
Annex C (informative) Convention of graphical presentation
18 Figure C.1 – Example of graphical presentation

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BS 1902-10.2:1994
$102.76