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ASTM D() – Standard Practice for Measurement of Wet Film Thickness by Notch Gages
All the other teeth or notches on the same side are of shorter lengths than the outside teeth or notches and represent different distances from the outside edge zero datum teeth.
Examples of such items are ellipses, thin edges, and corners. Manufacturing and Office Location: On curved surfaces such as pipes, cylinders, etc. These different distances represent the surface of the wet coating thickness to be measured.
Please first verify your adtm before subscribing to alerts. The thickness d444 dry powder coatings may also be measured with these type of gauges. Please first log in with a verified email before subscribing to alerts. The gauge may now be read to determine the wet film thickness.
Wet Film Thickness Gauges are designed to quickly and easily d444 the thickness of coatings immediately after they have been applied to a substrate. When wet film thickness is measured with the gauges on rough substrates, the thickness measurements made will most likely be from aztm surface ‘peaks’ and the wet film thickness measurement will represent the minimum overall wet film thickness. All the WFT gauges are highly ecomical priced. Also notched gages can be very useful in the shop and field for determining the approximate thickness of wet films over commercial articles where size s and shape s are not suitable for measurements by other types of gages.
Such a gage is applicable to coatings on flat substrates and to coatings on articles of various sizes and complex shapes where it is possible to get the end tabs astn the gage to rest in the same plane on the substrate. Model A Gauges The gauges are precision manufactured from hardened grade stainless steel. See dimensional drawing below. The teeth or notches on each side of the gauge are referenced to each other. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
These gauges meet the requirements of the following International Standards: Such a gage is applicable to coatings on flat substrates and to coatings on articles of various sizes and complex shapes where it is possible to get the end tabs of the gage to rest in the same plane astn the substrate.
ASTM D4414 – 95(2013)
WFT Gauge can also be used to measure powder coating thickness before it goes through curing. Always specify Stainless Steel or disposable plastic and WFT gauge number requirements in your order. Historical Version s – view previous versions of standard. It is the responsibility of the user of this standard to establish appropriate 4d414 and health practices and determine the applicability of regulatory limitations prior to use.
Consequently, the results from the notch gage are not to be used to verify the nonvolatile content of a coating. Wait several seconds to allow the teeth or notches of the gauge to become ‘wetted’ by the coating, then withdraw the gauge vertically keeping it at ninety degrees to the substrate. Wet film thickness gauges are also known d44144 wet film gauges, notched gauges, step gauges and WFT combs.
A ‘drag’ mark would indicate that the tooth or notch should have coating ‘clinging’ to it. How to Use a ‘Wet Film Thickness’ Gauge Wet Film Thickness Gauges are designed to quickly and easily measure the thickness of coatings immediately after they have been applied to a wstm. These gauges are also commonly known as: You may delete a document from your Alert Profile at any time.
Link to Active This link will always route to the current Active version of the standard. The ends of the teeth or notches are visually examined, some will be coated or ‘wet’ and some will not be coated or ‘wet’. Caltech’s wet film thickness gauge is designed to measure accurate liquid coating thickness in the easiest and fastest manner.
Add astn Alert PDF. Instructions On How To Use A ‘Wet Film Thickness Gauge’ Place the wet film thickness gauge at ninety degrees to the coated substrate and penetrate the surface of the coating with the notched or toothed side of the gauge until the substrate is firmly contacted.
The thickness of powder type coatings may also be measured before curing. These gauges are not designed as ‘throw-away’ items and should not be compared to gauges that are ‘printed’ or silk-screened. Most protective and high performance coatings are applied to meet a requirement or specification d4414 dry film thickness for each coat or for the completed coating system, or for both.
The values given in parentheses are for information only. Measuring Powder Coatings The thickness of dry powder coatings may also be measured with these type of gauges. Be sure to clean the gauge with an appropriate solvent after use.
For a given side, the two outside teeth or notches are the same size and are actually a zero reference datum which represents the substrate. If the document is revised or amended, you will be notified by email. This standard is also available to be included in Standards Subscriptions. The values given in parentheses are for information only. Proceed to Checkout Continue Shopping. We have no amendments or corrections for this standard.
Such a gage is applicable to coatings on flat qstm and to coatings on objects of various sizes and complex shapes. Each gauge has c4414 different measurement notches. The mode of operation is similar to measuring ‘wet’ coatings.