Oil & Gas
CRS PLUS sources certified equipment for hazardous areas — lighting, junction boxes and enclosures, plugs and sockets, motors and pumps, cable glands, instrumentation and HVAC — for Zone 1 and Zone 2 gas atmospheres and Zone 21 and 22 dust atmospheres. Each item is supplied with its ATEX or IECEx certificate and installation documentation.
Sourced through the qualified supplier base. Listing does not indicate stock held by CRS PLUS — availability, certification body and lead time are confirmed per enquiry.
Zone 1 and Zone 2 luminaires in Ex d, Ex e and Ex de construction; Zone 21 and 22 for dust atmospheres.
Aluminium alloy, stainless steel and GRP bodies with certified entries and terminals.
Interlocked designs prevent withdrawal under load; switched and non-switched variants.
Supplied against IEC frame size, kW rating, zone and temperature class. Motors and pumps are the products most often requested by fuel distributors and terminal operators.
Brass, nickel-plated brass and stainless steel, in metric and NPT threads.
Certified for use where a spark or surface temperature could ignite an explosive atmosphere.
For control rooms, analyser shelters and enclosed hazardous-area spaces.
Zones classify how often an explosive atmosphere is present. The zone sets the equipment category and the protection concepts that may be used. Classification is to IEC 60079-10-1 for gas and 60079-10-2 for dust.
| Gas | Dust | Presence of explosive atmosphere | Equipment category and typical concepts |
|---|---|---|---|
| Zone 0 | Zone 20 | Explosive atmosphere present continuously or for long periods | Category 1 · Ex ia, Ex ma |
| Zone 1 | Zone 21 | Explosive atmosphere likely in normal operation | Category 2 · Ex d, Ex e, Ex ib, Ex p, Ex m |
| Zone 2 | Zone 22 | Explosive atmosphere unlikely, and short-lived if it occurs | Category 3 · Ex n, Ex ic, plus all Zone 1 equipment |
Each protection concept is a different engineering approach to preventing ignition, defined in the IEC 60079 series. The concept determines where the equipment may be installed and how it must be maintained.
| Marking | Concept | How it works | Typical equipment |
|---|---|---|---|
| Ex d | Flameproof enclosure | The enclosure withstands an internal explosion and prevents it propagating outward through flame paths. | Motors, switchgear, junction boxes, luminaires |
| Ex e | Increased safety | Construction measures prevent arcs, sparks and excessive temperatures in equipment that does not normally produce them. | Terminal boxes, motors, luminaires |
| Ex i | Intrinsic safety | Electrical energy is limited below the level that could ignite the atmosphere. Ex ia for Zone 0, Ex ib for Zone 1, Ex ic for Zone 2. | Instrumentation, sensors, mobile devices |
| Ex p | Pressurised | Clean air or inert gas maintained inside the enclosure keeps the explosive atmosphere out. | Control panels, analyser houses |
| Ex n | Non-sparking | Equipment that does not arc or spark in normal operation, for Zone 2 only. | Motors, luminaires |
| Ex m | Encapsulation | Components are potted in a compound so an atmosphere cannot reach them. | Sensors, solenoids, small assemblies |
No manufacturer-specific data is published here: CRS PLUS sources from several certified manufacturers and each product carries its own certificate, which governs. These are the items every quotation and certificate will state, and every enquiry should specify.
| Item | Meaning |
|---|---|
| Ex marking string | e.g. Ex db eb IIC T4 Gb — protection concept, gas group, temperature class and equipment protection level |
| Gas group | IIA (propane), IIB (ethylene) or IIC (hydrogen, acetylene) — IIC covers all |
| Temperature class | T1 (450 °C) to T6 (85 °C) — the maximum surface temperature of the equipment |
| Equipment protection level | Ga/Gb/Gc for gas, Da/Db/Dc for dust |
| Ingress protection | IP rating to IEC 60529, typically IP66 for outdoor hazardous-area equipment |
| Certificate | ATEX EU-type examination certificate and/or IECEx certificate of conformity, with the notified or certification body named |
| Ambient range | Certified ambient temperature range, which matters in Gulf and African installations |
ATEX is the European Union directive framework: equipment for explosive atmospheres placed on the EU market must carry an EU-type examination certificate and CE marking. IECEx is the international IEC scheme, recognised across the Gulf, Africa, Asia and Australia, in which a certification body issues a certificate of conformity against the IEC 60079 series. Many products carry both. Operators in the GCC commonly specify IECEx, ATEX or both; the project specification governs which is required.
Zones classify how often an explosive gas atmosphere is present. Zone 0 is continuous or long-term presence, Zone 1 is likely in normal operation, and Zone 2 is unlikely and short-lived. Zones 20, 21 and 22 are the equivalent classification for combustible dust. The zone determines the equipment category and the protection concepts that may be used — Zone 0 requires Ex ia, Zone 1 accepts Ex d, Ex e and Ex ib among others, and Zone 2 additionally accepts Ex n and Ex ic.
Ex d, flameproof, contains an explosion inside a robust enclosure and cools the escaping gases through engineered flame paths, so it suits equipment that arcs or sparks in normal operation such as switchgear and motors. Ex e, increased safety, prevents ignition sources from arising in the first place by design, so it suits equipment that does not normally spark, such as terminal boxes and certain motors and luminaires. Ex d enclosures are heavier and their flame paths must be maintained; Ex e equipment is lighter and easier to install. Many products combine the two, marked Ex de.
The zone (0, 1 or 2, or 20, 21, 22 for dust), the gas group (IIA, IIB or IIC), the temperature class (T1 to T6), the required ingress protection rating, the certification scheme required (ATEX, IECEx or both), the electrical supply (voltage, phase, frequency), and the ambient temperature range at the installation. For motors and pumps, the frame size, rated power and duty; for luminaires, the lumen output and mounting; for sockets, the current rating and pin configuration.
Each item ships with its ATEX EU-type examination certificate and/or IECEx certificate of conformity, the manufacturer’s declaration of conformity, the installation and maintenance instructions required by IEC 60079-14 and -17, and the routine test certificate where applicable. Copies are provided with the quotation on request so the certificates can be checked against the project specification before ordering.
Standard luminaires, junction boxes, glands and sockets are commonly available from stock or within two to four weeks. Motors, pumps and configured control stations are typically six to twelve weeks depending on rating and certification. Lead time is confirmed on each quotation.
Oil and gas production, refining and terminals; fuel distribution depots and filling stations; petrochemical and chemical plants; paint and solvent handling; grain, flour, sugar and wood-dust processing; pharmaceutical manufacturing; and mining. Any facility where a flammable gas, vapour, mist or combustible dust may be present in quantities that could ignite.
CRS PLUS sources explosion-proof equipment from its qualified supplier base of certified manufacturers in Europe and Asia. Origin, certification body and lead time are stated on each quotation. CRS PLUS does not name manufacturers on this page and holds no distribution or agency agreement with any of them.
A structured offer follows within 72 hours.