Chemical Technology May 2016 low res1

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An enclosure that eliminates all

metal parts, for housing outdoor

equipment operating in ex-

tremely corrosive oper-

ating conditions, was

recently announced by

the field instrumentation

protection specialist Inter-

tec. The enclosure is made

from GRP (glass reinforced

polyester) a material offering

intrinsically high resistance

against the corrosive media

and environmental conditions

found in many field protection

applications.

Metal components on the ex-

ternal surfaces of the enclosure

can corrode quickly in aggressive

environments such as offshore

and coastal plants in oil, gas

and chemical, power generation

and other processing industries.

Intertec’s field enclosures are

made from GRP, but are typically

fitted with a number of metal parts

such as hinges, clasps, nuts and

bolts, made from 316 stainless

steel. However, to meet a request

from a customer building instru-

mentation systems for emissions

monitoring in a petrochemical

refinery, an application that can

be exposed to extremely corro-

sive atmospheres, Intertec has

developed a version of its Multibox

outdoor enclosure with nuts, bolts,

clasps, hinges and other accesso-

ries fabricated entirely from GRP.

Intertec’s Multibox is a two-

part, oblong-shaped enclosure

that can be mounted vertically

or horizontally. It has a deep and

shallow section for further versa-

tility of equipment mounting and

access, and either of the sections

can be used as the door. There

are nine standard sizes available

providing instrumentation and

control engineers with a range

of volumes from 25 to 277 litres.

The two enclosure pieces can be

fitted with hinges and clasps, or

left separate and joined together

using only clasps.

Intertec manufactures its en-

All-GRP enclosure is ideal for

ultra-corrosive environments

closures using high-performance

GRP. The GRP sheet material

used has a very high thermal

resistance compared to metal,

with an efficiency that is over

1 000 times better. GRP has

proven to be a highly superior

structural material for building

enclosures to protect field-based

instrumentation, control and com-

munications equipment.

The main competitive material

used in this application sector is

sheet metal. Intertec’s GRP is

produced using long-fibre glass

strands which makes it almost

as strong as stainless steel, yet

around 75 % lighter. GRP does

not rust or degrade in any mean-

ingful way for this field protection

application. Combined with its ex-

cellent insulation characteristics,

these properties make GRP an

excellent choice for the construc-

tion of robust outdoor enclosures,

allowing maintenance-free life-

cycles of 30 years and more.

Intertec has been using the

technology for over 50 years and

can cite many examples of GRP

enclosures that have operated for

30 years and more in harsh and

aggressive outdoor environments.

For more information contact:

Intertec Instrumentation on tel:

0800 756 1102; or

email:

sales@intertec-inst.co.uk

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