For hot-dip galvanizing applications, it is possible to measure and verify the steel surface profile according to ASTM D, Standard Test. ASTM D – 11 Standard Test Methods for Field Measurement of Surface Profile of Blast – Download as PDF File .pdf), Text File .txt) or read. ASME B, Surface Texture (Surface Roughness, Waviness and Lay); ASTM D, Standard Test Methods for Measurement of Surface Profile of Blast.
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NOTE 2—The test methods measure different values and the qualitative rating on which the applicability was determined also measures a different value. NOTE 1—Optical microscope methods serve as a referee method for surface pro? Precision and Bias 8. What is Surface Profile and Why is it Necessary?
Surface Profile Depth Micrometer – It is now required that the maximum individual reading of 10 or more surface profile readings per area are to be reported, rather than taking the average of ten readings per area. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Typical comparator surfaces are prepared with steel shot, steel grit, or sand or other nonmetallic abrasive, since the appearance of the pro? The instruments described are readily portable and sufficiently sturdy for use in the field. The height of a single valley below a plane at the level of the highest surrounding peaks is measured with the?
This standard is subject to revision asgm any time by the responsible technical committee and must be reviewed every? As a result, only two readings per area are now required to be averaged to obtain d417 measurement, instead of the three readings previously required. Work Item s – proposed revisions of this standard.
Updates to ASTM D | American Galvanizer’s Association
This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The standard does not address discarding outliers, but an update to the standard addressing outlier readings is planned. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
For hot-dip galvanizing applications, it is possible to measure and verify the steel surface profile according to ASTM D, Standard Test Methods for Field Measurement of Surface Asstm of Blast Cleaned Steel, prior to application of repair materials where the surface has been prepared via power tool or abrasive blast cleaning methods. According to ASTM D, a minimum of 2 readings is obtained per area; the average of the two readings is reported.
The three test methods described within D for measuring surface profile include visual comparators, surface profile depth micrometers, and replica tape. Each area is marked giving the nominal pro?
Differences in Surface Profile Measurements: ASTM D4417- Method B vs. Method C
This method can be used to measure the surface profile depth that is created by abrasive blast cleaning or impact-type power tools. For more information related to surface preparation as it relates to hot-dip galvanized steel, you can contact AGA Corrosion Engineer Alana Hochstein at ahochstein galvanizeit. Profile depth designations are based on the concept of mean maximum profile h max ; this value is determined by averaging a given number usually 20 of the highest peak to lowest valley d4417 made in the field of view of a standard measuring microscope.
Visual Comparator – This test method, as well as the comparator discs available on the market, have stayed the s4417, and therefore there were no updates for this test sstm. Do not drag the instrument across the surface between readings, or the spring-loaded tip may become rounded leading to false readings.
Measure the thickness of the tape compressed foam and non-compressible plastic? The values given in parentheses are for information only. Anyone making use of this information assumes all liability arising from such use.
Difference in Surface Profile Measurements: ASTM D Method B vs CKTA University
These changes reflect industry research on current tooling which revealed averaged measurements are consistently less than the values obtained using replica tape. Instead, recording of the highest 4d417 when using a depth micrometer most closely matches the same measurements produced using replica tape. According to ASTM D, a minimum of 10 readings is obtained per area; the maximum surface profile is reported discarding obvious outliers.
R4417 edition approved May 10, To avoid these discrepancies, it is recommended that a single method be employed on a project. This includes personalizing content and advertising.
Updates to ASTM D4417
During abrasive blast cleaning, the mass of the abrasive and the velocity of the abrasive movement created by compressed air generates kinetic energy the abrasive astj reach speeds of over miles per hour as it exits the blast nozzle. This can be done with the unaided eye, under 5 to 10 power magni?
There are additional techniques suitable for laboratory use not covered by these test methods.