ISO 19840 FREE PDF

ISO and PSPC, the term used is. “nominal dry film thickness.” • For consistency in comparisons of area in this article, square meters are used to describe. STANDARD. ISO. Second edition. Reference number. ISO (E). This is a free 5 page sample. Access the full version online. ISO Paints and varnishes – Corrosion protection of steel structures by protective paint systems – Measurement of, and acceptance.

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Degree of the surface preparatory treatment of products should correspond to requirements of specification Sa3 — blast cleaning to pure metall.

Calibration is carried out by the gauge manufacturer using frde thickness standards in most cases. In this case, the correction value shall be determined in accordance with Annex D.

NOTE Other methods using a similar principle are available. Rotary Wheel Heat Exchangers. Passes, curtaining, overflows and drops should be avoided. NOTE As a rule, the effect of substrate thickness is manifest in substrates up to a thickness of approximately 1 mm.

Each coat layer shall be applied uniformly over the whole surface. One shim should be thinner and one thicker than the NDFT of the coat s on the measurement object.

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Should be done before painting. Schedule of clearing works shall be made in such a way to make possible to start painting as soon as possible while surface has not become soiled again.

When using this method, the following vree of this International Standard do not apply: These instruments are mainly used to measure the thickness of coatings on non-magnetic i. At a substrate thickness of above approximately 5 sio, the effect is generally insigniicant. The procedures for areas requiring special consideration, such as welds, edges, corners, ixtures, areas with observed defects, shall be agreed by the interested parties. The thickness of the dry ilm above the peaks of the proile is deined as the instrument reading minus an appropriate correction value.

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Attention is drawn to the possibility that some of the elements of this document lso be the subject of patent rights.

This force is related to the coating thickness. The instrument is now ready for use. Adjust the scale reading to the value of the shim.

Acceptance criteria: ISO and coating system

Following the results of fulfillment and inspection of painting processes a person responsible for those issues a Painting Report in accordance with enclosed forms. If a correction value is used, it shall be subtracted from freee individual reading to give the individual dry-ilm thickness in micrometres.

In case of paints are stored in a cold premise, it is necessary to 1840 them before usage for a while in warm that they were adequately warmed. They measure the magnetic ield strength between a permanent magnet and a magnetic substrate. Enter the email address you signed up with and we’ll email you a reset link.

The chosen ios entail the measurement of dry-ilm thickness using measurement instruments based on the permanent magnet principle and the inductive magnet principle.

NOTE 1 The correction value is applied once to every reading, no matter if the coating consists of a single layer or multiple layers see illustration in Figure 1.

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If this is not possible, a special adjustment sample can be provided which is, in its material properties that can affect the ilm thickness measurement, similar to the steel structure and has been cleaned and pre-treated in the same way.

During warehousing of paints and solvents it sio necessary to consider safety data indicated on factory labels, requirements regarding storage jso and periods of storage. They can only be adjusted at one particular point on the scale, and this adjustment will have a limited effect on calibration over the full range.

Acceptance criteria: ISO 19840 and coating system

If this individual dry-ilm thickness does not meet the criterion see Clause 9it shall not be replaced. General introduction ISOPaints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 2: Annex A, which is informative, is a method based on adjusting the instrument to known thicknesses on a rough surface.

Solid alien contaminants are removed by cutting; fats, salts, consistent grease are washed off by water, alkalis or solvents. Fre dry-ilm thickness is obtained by using the appropriate correction value applied to readings based on adjustment on a smooth, lat steel surface.

Original packing shall be firmly closed; labels and stickers shall be plain and good to be read.

One test on one batch should be done. Work conforms to the requirements?