ASTM C704 PDF

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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ASTM C-704

Precision and Bias 5 Do not completely fill or flood the gun supply funnel with material. Provide an air gap between the orifice and the gun supply funnel to allow secondary air to enter with the abrading media. Turn on the air pressure. Included are the abrading media weight gramsspecimen weight gramsspecimen weight loss due to abrasion gramsand the resultant volume loss cubic centimeters.

Five different types of refractories, along with a float glass plate standard, were tested for abrasion resistance by each laboratory. Connect the lower funnel to the feed inlet of the blast gun with clear flexible poly vinyl chloride tubing with an inside diameter of 6.

We need your help! Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

ASTM C – Free Download PDF

Inspect the air generator nozzle for wear before any test series and replace as necessary. Take care to avoid segregation in large containers of abrading media. Provide an orifice approximately 4. Use one gauge as the primary gauge; all pressure measurements are to be taken asmt that gauge. No precision and bias statements can be made at this time.

Size px x x x x Combining values from the two systems may result in nonconformance with the standard. Regulate the air pressure to kPa [65 psi]. The glass tube is then positioned at a distance of 2 mm [0. The feed funnel contains a suitable orifice to obtain a flow time of 6 15 s while delivering g of abrading c074 into the gun supply funnel. Verify the sizing of the grit by either user confirmation of astk screen analysis or a certificate of conformance from the supplier.

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Normally, the free surface is c70 most appropriate test surface. Use one gauge as the primary gauge; all vacuum measurements are to be taken from that gauge. When connected with the abrasion tester, ensure that the feed mechanism delivers the abrading media in the specified time of 6 15 s. It is also recommended that air gauges be recalibrated at frequent intervals.

Position the specimen such that the abrasion pattern is centered on the surface of the plate. Refer to Table 2 for the acceptable precision statistics for float glass plate. Originally approved in This test method can also be applied to castable refractories see Metric Dimensions, Practice C and Practice C and plastic refractories see Practice C Dial to have a mirrored band for knife-edged pointer tip reflection to prevent parallax error.

If the abrasion plate results do not meet the standard, adjust the air pressure to the gun and run the calibration procedure again using a new glass plate each time until an abrasion of 9.

Other sand blast gun models or types may affect test results. All specimens were 4. The values stated in each system may not be exact equivalents; therefore, use each system independently of the other. Used for weighing the abrading media and test specimens. This is done by using a brass rod, 4. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

When the Carco Blast Gun is used, this will replace the steel nozzle supplied with the gun. Included are the abrading media weight gramsspecimen weight gramsspecimen weight loss due to abrasion gramsand the resultant volume loss cubic centimeters.

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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.

The second gauge is used only for verification. Several values are stated only in SI units as a matter of convention and to permit comparison of results. For the ruggedness test, air pressure was maintained at values of kPa [64 psi] and kPa [66 psi] by the use of a calibrated master series pressure gauge.

Observe the abrasion pattern of the glass plate through the edge of the plate. Include the date of the calibration, the air pressure used, the calibration value, and the event that triggered the calibration in the log entry.

If the samples are allowed to sit before being weighed, they may pick up moisture resulting in an inaccurate test result. This will allow the operator to push the glass tubing up until the rod touches the venturi, ensuring a 2 mm [0. Your comments will asstm careful consideration at a meeting of the responsible technical committee, which you may attend. This can be achieved by using a second glass plate under the calibration plate as a spacer, or by adjusting the height of the sample holding platform.

For the ruggedness test, flint glass tube inside diameters of 4. Highly Abrasion Resistant Materials S1. Only the most abrasion resistant materials can be 25 mm [1 in. The use of appropriate drying equipment is necessary asttm order to achieve consistent results.

Significance and Use 4. Flare the tubing at one end c74 sit snugly inside a 9. The abraded area is to be uniform and symmetrical.