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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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Only the use of surface profile depth micrometers and replica tape were updated, and the specification changes are as follows:. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? These changes reflect industry research on current tooling which revealed averaged measurements are consistently less than the values obtained using replica tape.

This can be discussed and agreed upon at the pre-construction conference. Your comments will receive careful consideration at a meeting of the responsible technical committee,1which you may attend.

The three test methods described within D for measuring surface profile include visual comparators, surface profile depth micrometers, and replica tape. The mode asttm determined with the comparator of Test Method A.

Updates to ASTM D4417

Hold the gage asmt its base and press? Note 1 — Optical microscope methods serve as a referee method for surface profile measurement methods A and B. The atsm must conform to the minimum and maximum surface profile requirements listed in the project specification. Only the d44117 of surface profile depth micrometers and replica tape were updated, and the specification changes are as follows: While both the depth micrometer and replica tape methods conform to ASTM D, the measurement acquisition principles are quite different.


The height of a single peak above an adjacent valley below is measured with a microscope for the qualitative rating that is compared with each of the methods in correlation calculations.

Originally approved in Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: 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 x4417 valley measurements made in the field of view of a standard measuring microscope. At each location make three readings and determine the mean.

For measurements that fall between tape sizes, 4d417 is still required that two readings using each tape are to be averaged to comprise one reading i. For this reason, surface profile should be measured prior to coating application to ensure that it meets that specified. As a result, only two readings per area are now required to be averaged to obtain one measurement, instead of the three readings previously required.

Because the results for the microscope and for the?

ASTM D contains three methods of measuring surface profile depth: The base of the instrument rests on the tops of the peaks of the surface pro? Surface profile is defined c4417 a measurement of the maximum peak-to-valley axtm created by abrasive impingement against a surface during abrasive blast cleaning operations, or by an impact-type power tool.

Models from a few gage manufacturers are available that conform to this standard. Then determine the mean for all the locations and report it as the pro? The comparator areas are used with or without magni?

Work Item s – proposed revisions of this standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phoneaatmor service astm. Current edition approved May 10, Leave a Reply Cancel reply Your email address will not be published.


Updates to ASTM D | American Galvanizer’s Association

Peak density the number of peaks per unit area also plays a key role in maintaining adhesion of the coating system and provides greater resistance to corrosion undercutting when the coating xstm gets damaged while in service. Standards for Measurement of Surface Profile. 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.

The four standards are: Instead, recording of the highest reading when using a depth micrometer most closely matches the same measurements produced using replica tape. There are currently four primary standards for measurement of surface profile in steel surfaces. 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.

Difference in Surface Profile Measurements: ASTM D Method B vs CKTA University

Same Surface, Different Results? Therefore, differences are inevitable, particularly with deeper surface profiles, and the results may or may not fall within the specified range for one of the two methods.

Inspection Instruments Pipeline Coatings — Volume 2: According to ASTM D, a minimum of 10 readings is obtained per area; the maximum surface profile is reported discarding obvious outliers.

Larger repair areas or prepared hot-dip galvanized surfaces for painting can be measured with two readings taken from a minimum of three, 6×6 inch 15×15 cm areas.