Heat Tracing for Tank Farms

A tank farm is more than a set of tanks: it is bunded areas, valves, manifolds, loading lines and instrumentation, all of which freeze in different ways. This guide covers the parts that a generic "tank heating" design often misses.

What freezes in a tank farm

• Valve bodies and stems — small mass, exposed, freeze first
• Manifolds and header branches — low flow or stagnant
• Instrument impulse lines and level gauges
• Drain and sample points
• Loading and transfer lines
• Fire water and foam lines inside the bund

Design points

1. Valves need insulation and tracing

An insulated pipe with an uninsulated valve body is a heat sink: the valve freezes while the line runs fine. Use removable insulated covers with integrated tracing for valves that need operation or maintenance access.

2. Manifolds and headers

Headers are often stagnant when only one branch is in use. Trace the main header and branches separately so an unused branch can be isolated but still protected, or arrange for drain-down.

3. Instruments and gauges

Level gauges, pressure gauges and impulse lines are small-bore and exposed. They need their own tracing and insulation — and alarms if they are protection-critical.

4. Drains and sample points

These are the first to freeze and are often left untraced. Either trace them or design them to drain completely after use.

5. Bunded areas and fire water

Fire water and foam lines inside a bund need freeze protection with alarms; they are safety systems and must work in the coldest conditions.

6. Power distribution

Distribute panels across the farm rather than running long feeders; long runs create voltage drop and coordination problems, especially with many small circuits.

Scope checklist

Common mistakes

• Tracing pipes but leaving valve bodies bare.
• Leaving drains and sample points untraced.
• One traced header with unprotected stagnant branches.
• No freeze protection on fire water inside the bund.
• Long feeders causing voltage drop on small circuits.