← ATEX Enclosures
iGRP · GRP Enclosure

Where stainless
isn't the answer.

Black glass-reinforced polyester enclosures for corrosive, coastal and chemical environments. ATEX certified for Zones 0, 1 & 2. Non-metallic, non-magnetic, non-conductive. IP66 & IP67.

iGRP GRP terminal box · P5 · Zone 1 · terminals fitted
iGRP · Zones 0, 1 & 2
ATEXZones 0, 1 & 2
IP ratingIP66 & IP67
MaterialGRP · die cast black
Made inKent, UK
Lead time3–4 weeks
What it is

Glass-reinforced polyester.
Built for the worst environments.

The iGRP is a die cast black glass-reinforced polyester (GRP) enclosure certified to ATEX under EPS09ATEX1237, marking II 1 G D T6, II 2 G D. It covers Zones 0, 1 & 2 for gas (Ex ia/ib/ic IIC, Ex e IIC, Ex nA, Ex nR) and Zones 21 & 22 for dust (Ex tb IIIC Db IP66). It is specified where metallic enclosures are unsuitable, aggressive acids, coastal brine, RF-transparent applications, or environments where non-magnetic or non-conductive properties are required.

Available empty or populated with Ex e certified terminals to your schedule. Same-day quoting, 3–4 week lead time from our Ashford facility.

Corrosion-proof
Resistant to most acids and alkalis

GRP polyester is immune to the corrosion that affects even 316L stainless in aggressive acid, bleach or brine environments. Halogen-free material throughout.

Non-metallic
Non-magnetic · non-conductive

Specified where magnetic or conductive enclosures cause interference or are a specification requirement. Also common in RF and instrumentation installations.

30% lighter
Easier to install at height

Significantly lighter than an equivalent stainless enclosure. Relevant for overhead and elevated installations, offshore platforms, or where manual handling is a concern.

ATEX certified
Zones 0, 1 & 2 · Ex ia, Ex e

Apparatus cert EPS09ATEX1237, marking II 1 G D T6, II 2 G D. Covers Zone 0 (Ex ia IIC), Zones 1 & 2 (Ex ia/ib/ic, Ex e, Ex nA, Ex nR) and dust Zones 21 & 22 (Ex tb IIIC Db IP66).

Die cast black
Carbon doped · antistatic

Carbon doping provides antistatic properties required for ATEX use. High UV, dust, fat, oil and bacterial resistance. LSOH throughout. Other colours available on request.

Terminals fitted
Ex e terminals to your schedule

Supplied empty or populated with CML-certified Ex e terminals in your count and configuration. DIN rail, earth bars and end-stops included. Full ATEX documentation supplied.

Material selection

GRP versus
stainless steel.

Neither material is universally better. GRP is chosen when corrosion, weight, conductivity or cost make stainless less suitable. If your environment or spec calls for stainless, see our iTB and iSTB ranges.

Property
iGRP · GRP
Stainless steel
Material
Glass-reinforced polyester
Austenitic stainless steel
Colour
Die cast black
Brushed stainless (natural)
Weight
~30% lighter
Heavier baseline
Corrosion
Immune to most corrosion
Grade-dependent
Magnetic
Non-magnetic
304/316 non-magnetic, mild steel magnetic
Conductive
Non-conductive
Electrically conductive
Cost
Lower material cost
Higher material cost (316L)
ATEX cert
EPS09ATEX1237 · Zones 0–2
CML 18ATEX3300X
Best for
Chemical · coastal · GRP-spec
Marine · food · pharma
Specification

Key technical data.

Full dimensional drawings and chemical resistance data available on request. Download the product datasheet for the standard specification.

ATEX marking
II 1 G D T6 · II 2 G D
Gas protection
Ex ia/ib/ic IIC Gb, Ex e IIC Gb, Ex nA, Ex nR · Zones 0, 1 & 2
Dust protection
Ex tb IIIC Db IP66 · Zones 21 & 22
IP rating
IP66 & IP67 (EN 60529:1992)
Ambient temperature
−60°C to +50°C
Service temperature
−55°C to +100°C
Impact resistance
7 J/m (10 J/m self-certified)
Material
Carbon doped black glass-fibre reinforced polyester
Material thickness
5mm sides
Finish
Die cast black · other colours on request
Lid
Fully removable · captive M6 316L stainless screws · hinges optional
Gasket
One-piece silicone · IP66/67 rated · LSOH
Cable entries
Directly tapped and threaded
Enclosure earth
PE terminals standard · 6mm brass stud optional
Size range (ATEX)
75×80×55 mm to 250×600×160 mm
Apparatus cert
EPS09ATEX1237
Component cert
EPS10ATEX1268U
Standard sizes

Off-the-shelf dimensions.

Standard sizes shown below. Custom sizes available to order, contact us with your requirements. ECP (end cap plates) available for most sizes; seek sales advice for iGRP 121209, iGRP 404012 and iGRP 404020.

Part number
A, H (mm)
B, W (mm)
C, D (mm)
Max W (watts)
iGRP 070805
75
80
55
7.5
iGRP 071105
75
110
55
8
iGRP 071605
75
160
55
9
iGRP 071905
75
190
55
9.4
iGRP 121209
120
122
90
9.4
iGRP 122209
120
220
90
9.4
iGRP 161609
160
160
90
10.4
iGRP 162609
160
260
90
12
iGRP 163609
160
360
90
13.8
iGRP 252512
250
255
120
15.5
iGRP 252516
250
255
160
15.5
iGRP 254012
250
400
120
15.5
iGRP 254016
250
400
160
15.5
iGRP 256012
250
600
120
31
iGRP 256016
250
600
160
31
iGRP 404012
405
400
120
31.4
iGRP 404020
405
400
200
31.4

Full gland entry and terminal population details available on request.

Gallery

Inside and out.

iGRP P5 · Zone 1 · terminals fitted
iGRP P5 · three-quarter view
Ex e terminals through cable entry
Certification

Certified for
Zones 0, 1 & 2.

The iGRP carries a GRP-specific ATEX apparatus certificate (EPS09ATEX1237) and a component certificate (EPS10ATEX1268U), both from EPS, independent from our stainless steel certificates. Every ATEX iGRP ships with a full Declaration of Conformity and Conformity of Construction.

Apparatus
EPS09ATEX1237
II 1 G D T6, II 2 G D · Gas zones 0/1/2 · Dust zones 21/22
View PDF ↓
Component
EPS10ATEX1268U
Component certificate · service temp −55°C to +100°C
View PDF ↓
ATEX GRP
EPS 13 ATEX 1616X
GRP polyester enclosures · Ex e IIC
View PDF ↓
ISO
ISO 9001:2015
Quality management system
View PDF ↓
Get started

GRP specified?
We'll quote it today.

Tell us your size, terminal count and application. Same-day quote. 3–4 week lead time from our Kent facility.

Get a quote Download datasheet