Storage Tanks Pakistan Equipment and Products Pakistan

Storage Tanks Pakistan Equipment and Products Pakistan

Storage Tanks Pakistan Equipment and Products Pakistan

🧩 1. Internal Floating Roofs (IFRs) & Seals

• Purpose: Minimise vapour space above the stored liquid to reduce emissions of volatile organic compounds (VOCs).

• Seals: Installed between the floating roof and tank wall to prevent vapour escape. Types include:

  • Primary seal (rim-mounted)

  • Secondary seal (weather seal)

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🔥 2. Flame Arresters

• Purpose: Prevent external flames or ignition sources from travelling into the tank vapour space.

• Location: Installed on vent lines or breather vents.

• Types: End-of-line and in-line flame arresters.

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🌬️ 3. Pressure Vacuum Vents (PVRVs)

• Purpose: Maintain tank pressure within safe limits during product filling or emptying.

• Function:

  • Pressure Relief: Releases vapour if internal pressure exceeds setpoint.

  • Vacuum Relief: Allows air in to prevent vacuum collapse when draining.

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💨 4. Breather Vents

• Purpose: Allow atmospheric air exchange while minimising vapour loss.

• Function: Acts like a basic PVRV, usually for low-pressure applications.

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🚨 5. Emergency Vents / Emergency Relief Vents

• Purpose: Provide rapid pressure relief during fire or abnormal over-pressurisation (e.g., external fire heating the tank).

• Type: spring-loaded or hinged covers that open at high pressure thresholds.

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🧪 6. Gauge Hatch

• Purpose: Manual access point for sampling, temperature checks, or tank gauging.

• Safety Feature: Often spring-loaded and gasketed to limit vapour escape.

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🌀 7. Floating Suction Units

• Purpose: Withdraw product from just below the liquid surface, avoiding settled water, sludge, or contaminants at the bottom.

• Common in: Aviation fuel and high-purity liquid storage tanks.

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💧 8. Roof Drain Systems

• Purpose: Remove rainwater accumulation from external or internal floating roofs.

• Types:

  • Flexible hoses

  • Swivel or articulated pipe systems

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🛢️ 9. Oil Skimmers

• Purpose: Remove accumulated oil or hydrocarbons from tank bottoms or water surfaces.

• Types: Fixed, floating, or weir-based skimmers.

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🔁 10. Swivel & Pivot Joints

• Purpose: Enable flexible movement of roof drain lines or floating suction assemblies.

• Designs: 360° rotational capability to avoid hose fatigue or breakage.

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🔍 11. Sight Glass

• Purpose: Visual inspection of liquid flow or level in tank piping or process systems.

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📏 12. Tank Liquid Level Indicators

• Purpose: Show real-time liquid level inside the tank.

• Types:

  • Mechanical float & tape

  • Magnetic level indicators

  • Radar/ultrasonic level sensors

  • Servo gauges