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Corrosion Protection Application<br />
Application of corrosion protection agents depends on the corrosivity category of the environment or of the soil.<br />
Generally, W1 and W2 design couplings have to be protected against corrosion if use in soil or corrosive environment<br />
is to be expected. An example of how to correctly apply corrosion protection is given in the following<br />
assembly description of a dual-strip system corrosion protection.<br />
Example no.1: STRAUB-COMBI-GRIP 48.3 / 50 mm (zinc-plated lock)<br />
Remove the type ID label and clean the<br />
coupling using acetone. On both coupling<br />
sides, place a mark at a distance of…<br />
Ensure that the transition between coupling<br />
and pipe is as smooth as possible.<br />
Mechanically clean the locations to be<br />
protected and wipe as dry as possible.<br />
If necessary, use a flame…<br />
Apply PE tape onto the corrosion protection<br />
strip as mechanical protection.<br />
Overlap the strip at 100mm on both sides<br />
...10cm. Apply primer within the two<br />
marks. Seal any cavities and transitions…<br />
Evenly wrap the inner strip within the<br />
two marks.<br />
Example no.2: STRAUB-FLEX 2 XS 1229.0 mm (zinc-plated housing and lock)<br />
…to dry any cavities around the lock.<br />
Seal any cavities and transitions using<br />
joint sealer, particularly in the lock area.<br />
Apply one layer of pipe protection matting<br />
around the corrosion protection creating<br />
an overlap of approx. 200mm on both<br />
sides.<br />
… using joint sealer, particularly in the<br />
lock area. Fill the cavities.<br />
Place the protective strip within the two<br />
marks.<br />
Wrap and press the corrosion protection<br />
strip around the coupling in three layers -<br />
avoid cavities.<br />
Using a gentle flame, heat the surface<br />
under the overlap and press down to fix<br />
the matting.<br />
The two examples are only to illustrate how to apply corrosion protection. Any coupling dimension can be protected<br />
against corrosion this way. Alternatively, there are other similar procedures. Please apply the corrosion protection<br />
according to the application instructions of the corrosion protection manufacturer or consult STRAUB directly.<br />
Technical Manual 2012/01 57
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