What Is an FLP Panel?

FLP stands for Flameproof. An FLP Panel is a specially constructed electrical enclosure intended for use in locations where flammable gases, vapours or dust may create a hazardous atmosphere.

Unlike an ordinary electrical panel, a flameproof enclosure is designed around specific protection requirements. The enclosure, joints, cable entries and installed equipment must be compatible with the certified protection concept and the hazardous-area classification.

A key principle of flameproof protection is that if an ignition occurs inside the enclosure, the enclosure is designed to withstand the resulting pressure and restrict the transmission of flame to the surrounding hazardous atmosphere.

Where Are FLP Panels Used?

FLP Panels are generally considered for industries where hazardous-area electrical equipment is required, such as:

• Oil & gas facilities
• Petroleum installations
• Chemical plants
• Petrochemical industries
• Pharmaceutical plants
• Paint and solvent facilities
• Refineries
• Gas processing facilities
• Fuel storage areas
• Distilleries
• Process industries
• Hazardous material handling areas

The suitability of a particular FLP panel depends on the hazardous-area classification, gas/dust group, temperature class and applicable certification.

Why Ordinary Panels May Not Be Suitable

A conventional electrical enclosure is not automatically appropriate for a hazardous location.

Electrical equipment can potentially produce:

• Sparks
• Arcs
• Hot surfaces
• Switching ignition
• Electrical faults

In an atmosphere containing flammable gas, vapour or combustible dust, these ignition sources can create serious hazards.

FLP equipment is therefore designed and certified according to a specific protection concept and intended hazardous-area application.

FLP Panel Construction

The enclosure is generally manufactured using robust metallic construction suitable for the intended hazardous-area application.

Depending on the design, an FLP Panel may include:

• Flameproof enclosure
• Flameproof joints
• Certified cable glands
• Certified electrical components
• Control switches
• Push buttons
• Indication lamps
• Contactors
• Relays
• MCBs/MCCBs, where certified and suitable
• Terminal blocks
• Control transformers
• Meters
• Emergency-stop devices
• Earthing arrangements

Important: Components and cable entries used within a certified flameproof assembly must be appropriate for the certification and protection concept. An ordinary component cannot simply be placed inside an FLP enclosure and assumed to make the complete panel flameproof.

Technical Specification Reference

FLP Panels are application-specific products. The following table provides a general specification framework rather than a universal rating.

Parameter	Typical Option / Requirement
Product	FLP / Flameproof Panel
Protection Concept	Ex d, where applicable
Application	Hazardous Area Electrical Control
Supply Voltage	According to system design
Frequency	Commonly 50 Hz
Phase	Single / Three Phase
Enclosure	Flameproof Metallic Enclosure
Internal Components	Certified/Suitable Components
Cable Entry	Certified Flameproof Cable Glands
Control Devices	Push Buttons / Selector Switches / Indication
Protection	MCB / MCCB / Other suitable protective devices
Metering	Optional
Earthing	Dedicated Earthing Arrangement
Mounting	Wall Mounted / Floor Mounted
Area Classification	Project Specific
Gas/Dust Group	Project Specific
Temperature Class	Project Specific
Certification	Applicable certification required for intended location

Understanding Hazardous-Area Classification

Selecting an FLP Panel starts with understanding where the panel will be installed.

For gas and vapour hazards, hazardous locations may be classified using systems such as Zone 0, Zone 1 and Zone 2. For combustible dust, Zone 20, Zone 21 and Zone 22 may apply.

The equipment’s certification must correspond to the hazardous location in which it will be installed.

This means that simply asking for an “FLP Panel” is not enough. The supplier needs the relevant hazardous-area information to select suitable equipment.

Gas Group & Temperature Class Matter

Two important parameters in hazardous-area equipment selection are the gas group and temperature class.

Different gases and vapours have different ignition characteristics. Similarly, electrical equipment has a maximum surface-temperature classification.

Therefore, an FLP Panel intended for one hazardous environment should not automatically be assumed suitable for another.

The panel should be selected according to the actual hazardous-area documentation and applicable certification.

FLP Panel vs Standard Electrical Panel

Feature	FLP Panel	Standard Panel
Intended Environment	Hazardous-area applications	Normal/non-hazardous areas
Enclosure	Special flameproof construction	Conventional enclosure
Certification	Hazardous-area certification required	Standard assembly requirements
Cable Entries	Suitable certified glands	Conventional glands
Component Selection	Hazardous-area suitability required	Normal industrial components may be used
Main Consideration	Ignition-risk containment	Electrical protection and distribution

Important Features of an FLP Panel

• Flameproof Enclosure

The enclosure forms an essential part of the protection system.

• Specialised Joints

Flameproof joints are designed according to the applicable protection requirements.

• Certified Cable Entries

Cable glands and entry arrangements need to be suitable for the enclosure and hazardous-area certification.

• Suitable Internal Equipment

Switchgear and control components must be compatible with the intended protection method and certification.

• Earthing

Appropriate protective earthing is essential for safe operation.

• Clear Identification

Equipment markings and certification information help verify suitability for the intended installation.

Where Sohum Industrial Sales Corporation Can Support FLP Requirements

Sohum Industrial Sales Corporation can cater to FLP Panel requirements for applications involving:

• Flameproof control stations
• Hazardous-area control panels
• Motor control arrangements
• Pump control
• Process equipment
• Local control stations
• Electrical switching applications
• Industrial instrumentation interfaces
• Hazardous-area machinery

The exact panel arrangement can be based on the customer’s electrical drawings, hazardous-area classification and required control functions.

Information Required Before Ordering an FLP Panel

For hazardous-area equipment, technical information is particularly important. Customers should ideally provide:

• Hazardous-area classification
• Zone
• Gas or dust group
• Temperature class
• Required certification
• Supply voltage
• Current/load rating
• Number of feeders
• Control functions
• Number of push buttons/switches
• Metering requirements
• Cable size
• Cable-entry arrangement
• Indoor/outdoor installation
• Ambient conditions
• Mounting arrangement

Providing these details helps avoid selecting equipment that is electrically suitable but inappropriate for the hazardous environment.

Quality & Certification Considerations

FLP equipment should not be evaluated only by the thickness or weight of its enclosure. Certification and suitability for the intended hazardous location are critical.

For projects in India, the applicable regulatory/certification requirements should be confirmed for the particular hazardous-area equipment and installation. Relevant standards may include the IEC 60079 series, depending on the protection concept and equipment type.

The certification marking should be checked for the actual:

Protection type + Zone suitability + Gas/Dust group + Temperature class

This is particularly important when purchasing FLP Panels for oil, gas, chemical and process-industry applications.

Why Choose Sohum Industrial Sales Corporation?

Sohum Industrial Sales Corporation supplies FLP Panels for customers requiring electrical control and switching solutions for hazardous industrial environments.

The company serves customers across West Bengal, Kolkata, Odisha, Chhattisgarh, Bihar, Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Tripura and Bhutan.

Panel requirements can be evaluated according to the electrical load, control functions, hazardous-area classification, enclosure requirements and applicable certification.

A Safety-Critical Panel Requires the Right Specification

FLP Panels are not simply heavy-duty versions of conventional electrical panels. Their selection depends on the hazardous environment, protection concept, certification, electrical rating and installation conditions. For this reason, the safest approach is to specify the panel from the project’s hazardous-area documentation rather than selecting it only by voltage or current rating. Sohum Industrial Sales Corporation provides FLP Panel solutions for industrial customers requiring application-specific equipment for hazardous-area electrical installations across eastern and northeastern India.