TPT January 2008

84 / 140

January 2008 82 ›
R egular stern warnings about the
consequences of faulty practice – such
as protracted standstills of the tube galvanizing
equipment, zinc losses, inordinate repair work
– dramatize the importance of these barrier
specialties, although they scarcely need it.
Coating, jacketing, and galvanizing form the first
line of defence against all that would compromise
the integrity of the tube. They are not likely to be
undervalued.
But, while the protective element is paramount,
these specialties have a further mandate. The
fortified tubular must perform as well as survive,
and whatever protects it must dovetail perfectly with its function. Anyone who has seen partial-
coverage jacketed pipe being made with the use of lap-joint, weld-neck, and insert-type flanges
has been present at the creation of a workhouse product. Unless the bore of the flanges is securely
welded to the core pipe, it is almost moot how effectively the apparatus is jacketed.
Protection issues, then, span the industry. The literature often accompanying these specialties
may usually start out on a cautionary note. But that is because the professionals in this field
know that the story ends well: with the fine products of the tubemaker’s art made impregnable to
exterior assault over the full course of their life in service.
Quakercoat® UV coatings from Quaker,
USA, are designed to meet all the
requirements of the steel tube and pipe
industry. Quaker’s UV chemistry has been
formulated for use as a basic clear coat
and full hide black coat. Custom colour
formulations are also available.
Quakercoat UV coatings contain zero
VOCs. The near-instantaneous cure
response reduces product handling
issues and improves ‘just-in-time’ delivery
requirements. Surface properties include
scuff and scratch resistance, and high
gloss. The coatings have excellent
weathering ability and are formulated to
achieve high levels of salt spray resistance.
It is possible to achieve high film builds,
ranging from 0.5 to 2.0 dry mils.
All Quakercoat UV coatings are ready to use,
have no pot life, and can be applied easily
with airless, conventional air spray, flood
and wipe, or a vacuum coater. The coatings
allow for immediate
outdoor storage in wet
conditions and are
typically waterproof.
The coatings
are available in
three classes of
performance. The
Quakercoat 060
series and 035 series
are both flexible and
durable coatings
available in clear or smoked versions. The
high performance coatings have excellent
salt spray and immersion resistance.
Quakercoat 060 provides 100 per cent
adhesion when applied to properly
prepared hot rolled or cold rolled steel, and
is effective on seamless tubes, providing
improved consistency, better appearance,
and reduced handling damage. The 035
series provides 100 per cent adhesion
when applied to commercially clean cold
rolled steel, hot rolled, or pre-galvanised
steel, and is most frequently used in welded
tube operations.
Quakercoat 028 series is recommended
for straight/non-mechanical pipe, and will
have 90+ adhesion levels when coated
and cured to commercially acceptable
levels. This product is not recommended in
operations that require flexibility.
Quaker Chemical Corporation – USA
Fax: +1 610 832 8682
Email:
Website:
Protection Issues: Coating, Jacketing
& G alvanizing T echnology
UV coatings – a solution for cosmetic protection
fi Quaker offer a range of tube and pipe coatings