Sspc sp6 b sa2 c sa 2 and d sa 2 sspc sp7 b sa1 c sa 1 and d sa 1 descriptions of the sspc standards can be found on page 22.
Sa 2 5 surface profile measurement.
While two dft measurements might be expected to be very close two surface profile measurements can differ considerably.
Hi s p s.
Coarse and extra coarse the surface profile measurement almost is a mandatory requirement by most coating specifications.
Sa 2 5 or sa 2 1 2 sa 3 shot blasting grit blasting comparators iso8503 sa 2 1 2 sa2 5 sa 3 shot grit sand blasting surface comparator rubert elcometer tqc elcometer e125 1 grit blasting section profiles 25 60 100 150μm elcometer e125 2 shot blasting section profiles 25 40 70 100μm tqc ld2040 tqc ld2050 rubert 17.
We are a leading manufacturer of sa 2 5 surface roughness comparator we offer a wide range of sa 2 5 surface roughness comparator these two comparators item 017 for shot blasting 018 for grit blasting are specially designed to check the roughness of steel surfaces which have been blast cleaned to cleanliness grades sa 2 5 and sa 3 before painting.
Hopefully someone who is more knowledgeable about this will answer because i don t see how you can measure things that are covered by sa 2 5 like discoloration visible oil and greyness with a profilometer.
Figure 3 the keene tator surface comparator 1 with magnifier 3 and shot grit and sand discs.
Sa 2 5 or sa 2 1 2 sa 3 shot blasting grit blasting comparators iso8503 sa 2 1 2 sa2 5 sa 3 shot grit sand blasting surface comparator.
Amplitude surface profile amplitude is a measurement given in microns that shows the difference between the peaks and troughs in a metal surface produced by blast cleaning.
Digital surface profile gauge to measure ra value on sand shot grit blasted surfaces.
D7127 allows for the use of a stylus instrument that measures the rt which is the distance between the peak and trough of a blast pattern as well as the peak count in the blast section that is being assessed.
Two type of replica tapes is available in the market i e.
Ra roughness meter surface profilo meter astm d 4417 b.
There must be adequate.
The coarse tape was made for the surface profile of 0 8 thru 2 mil 20 to 50 μm and extra coarse tape made for 1 5 to 4 5 mil 37 to 112 μm.
D7127 methods of measuring blast surface profile in addition astm d4417 11 provides an alternative way to measure the blast profile.
Nor can i see how you can reasonably expect a given surface profile from performing operations that comply with a blast cleaning specification that is.
Such is the nature of a blasted surface.
