This standard is issued under the fixed designation C ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee C08 on. Abrasion Resistance of Refractory Materials at Room Temperature1 This standard is issued under the fixed designation C/CM; the number immediately. ASTM C – Download as PDF File .pdf), Text File .txt) or read online. ASTM C
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We need your help to maintenance this website. We need your help! Splitting possibly with use of a riffler or another similar procedure and reblending may be necessary to obtain a grit sample conforming to the required screen analysis.
No interference statements can be made at this time. Several values are stated only in SI units as a matter of convention and to permit ast of results. Originally approved in Provide an orifice approximately 4.
Individually measure and x704 all nozzle tubes to conform to a specified 4. All specimens were 4. Ensure that there are not any flow obstructions between the gauge and the gun.
Other sand blast gun models or types may affect test results. Provide an air gap between the orifice and the gun supply funnel to allow secondary air to enter with the abrading media. Take the statistically significant effect of this small air pressure variation into consideration and use only gauges as specified in 6.
Several factors were found to cause statistically significant effects on measured results see Section 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.
Provide a gap between the two ashm to allow for air to be introduced to the particle stream. Five different types of refractories, along with a float glass plate standard, were tested for abrasion resistance by each laboratory. The values stated in each system may not be exact equivalents; therefore, use adtm system independently of the other.
Link to Active This link will always route to the current Active version of c740 standard. When the Carco Blast Gun is used, this will replace the steel nozzle supplied with the gun. The feed funnel contains a suitable orifice to obtain a flow time of 6 15 s while delivering g of abrading media into the gun supply funnel.
Regulate the air pressure to the pressure indicated by the most recent calibration of the abrasion tester. Cleanly cut the ends of the glass tube and do not fire polish them. Summary of Test Method asgm.
Determine the volume of the specimens by measurement of length, width, and thickness to the nearest 0. Take the statistically significant effect of this small tube inside diameter variation into consideration. Combining values from the two systems may result in non-conformance with the standard.
The diameter may be 7c04 by the use of a gage consisting of a tapered stainless steel rod with the 4. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Ensure the gun is perpendicular to the specimen. Maintain the mm 8 in. 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.
Flare the tubing at one end to sit snugly inside a 9. If correcting the position of the glass nozzle does not correct the problem then check the condition of the venturi, the condition of the abrading media feed lines, and the blast gun. In this case, dry the sample as in 8. If the vacuum gauge does not show a minimum vacuum of mm 15 in.
Inspect asgm air generator nozzle for wear before any test series and replace as necessary. Equip the gun supply funnel with a 4. For monolithic refractory specimens, test the surface that is, top free face or bottom mold face that most accurately reflects the actual field situation.
Size px x x x x Fit the nozzle tightly into the grommet in order to achieve adequate vacuum see 8.
ASTM C – Free Download PDF
Typically a to g capacity balance is required. Two test results that do not differ by more than the reproducibility interval shall be considered to be from the same population; conversely, two test results that do differ by more than the reproducibility interval shall be considered to be from different populations.
The glass tube is then positioned at a distance of 2 mm [0. Due to small irregularities normally present in the shape of the glass plates, use of a water immersion method is suggested. Ideal glass tube 3 Detailed prints for the construction of the test chamber are available at a nominal cost from ASTM International Headquarters.
The five types of refractories were a high-alumina brick, a silica brick, an abrasion-resistant castable, a super-duty fire brick, and a conventional high-cement castable. Glass tube lots purchased as 7 mm outside diameter tube with a nominal 1.
Alternate dust handling systems such as venting to the outside are acceptable as long as the chamber pressure is maintained at the desired level.