Storage Tanks Pakistan Equipment and Products Pakistan
Storage Tanks Pakistan Equipment and Products Pakistan
🧩 1. Internal Floating Roofs (IFRs) & Seals
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Purpose: Minimise vapour space above the stored liquid to reduce emissions of volatile organic compounds (VOCs).
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Seals: Installed between the floating roof and tank wall to prevent vapour escape. Types include:
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Primary seal (rim-mounted)
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Secondary seal (weather seal)
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🔥 2. Flame Arresters
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Purpose: Prevent external flames or ignition sources from travelling into the tank vapour space.
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Location: Installed on vent lines or breather vents.
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Types: End-of-line and in-line flame arresters.
🌬️ 3. Pressure Vacuum Vents (PVRVs)
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Purpose: Maintain tank pressure within safe limits during product filling or emptying.
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Function:
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Pressure Relief: Releases vapour if internal pressure exceeds setpoint.
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Vacuum Relief: Allows air in to prevent vacuum collapse when draining.
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💨 4. Breather Vents
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Purpose: Allow atmospheric air exchange while minimising vapour loss.
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Function: Acts like a basic PVRV, usually for low-pressure applications.
🚨 5. Emergency Vents / Emergency Relief Vents
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Purpose: Provide rapid pressure relief during fire or abnormal over-pressurisation (e.g., external fire heating the tank).
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Type: spring-loaded or hinged covers that open at high pressure thresholds.
🧪 6. Gauge Hatch
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Purpose: Manual access point for sampling, temperature checks, or tank gauging.
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Safety Feature: Often spring-loaded and gasketed to limit vapour escape.
🌀 7. Floating Suction Units
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Purpose: Withdraw product from just below the liquid surface, avoiding settled water, sludge, or contaminants at the bottom.
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Common in: Aviation fuel and high-purity liquid storage tanks.
💧 8. Roof Drain Systems
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Purpose: Remove rainwater accumulation from external or internal floating roofs.
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Types:
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Flexible hoses
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Swivel or articulated pipe systems
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🛢️ 9. Oil Skimmers
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Purpose: Remove accumulated oil or hydrocarbons from tank bottoms or water surfaces.
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Types: Fixed, floating, or weir-based skimmers.
🔁 10. Swivel & Pivot Joints
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Purpose: Enable flexible movement of roof drain lines or floating suction assemblies.
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Designs: 360° rotational capability to avoid hose fatigue or breakage.
🔍 11. Sight Glass
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Purpose: Visual inspection of liquid flow or level in tank piping or process systems.
📏 12. Tank Liquid Level Indicators
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Purpose: Show real-time liquid level inside the tank.
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Types:
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Mechanical float & tape
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Magnetic level indicators
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Radar/ultrasonic level sensors
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Servo gauges
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