Enclosure for Corrosive Environments

Wednesday, May 4, 2016 @ 09:05 AM gHale


An enclosure that eliminates all metal parts, for housing outdoor equipment operating in extremely corrosive operating conditions released from field instrumentation protection specialist Intertec.

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 external 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 consist of GRP, but typically end up 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 instrumentation systems for emissions monitoring in a petrochemical refinery, an application exposed to extremely corrosive atmospheres, Intertec developed a version of its Multibox outdoor enclosure with nuts, bolts, clasps, hinges and other accessories fabricated entirely from GRP.

Intertec’s Multibox is a two-part, oblong-shaped enclosure a user can mount vertically or horizontally. It has a deep and shallow section for further versatility of equipment mounting and access, and either of the sections can end up used as the door. There are nine standard sizes available providing instrumentation and control engineers with a range of volumes from 25 to 277 liters (0.88 to 9.78 cubic feet). The two enclosure pieces can end up fitted with hinges and clasps, or left separate and joined together using only clasps.

Intertec manufactures its enclosures 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.