1. What is a Raychem Heat Trace Calculator?

Definition: This calculator determines the total length of heat tracing cable needed for pipe systems according to Raychem standards.

Purpose: It helps engineers and technicians properly size heat tracing systems to prevent freezing and maintain process temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Length \) — Total heat trace length required (meters)
• \( Pipe\ Length \) — Straight run of pipe to be traced (meters)
• \( Fittings\ Allowance \) — Additional length for valves, supports, and other components (meters)

Explanation: The total heat trace length accounts for both the linear pipe runs and additional tracing needed for pipe components.

3. Importance of Accurate Heat Trace Calculation

Details: Proper length calculation ensures complete freeze protection, maintains process temperatures, and prevents energy waste from oversized systems.

4. Using the Calculator

Tips: Measure the total pipe length needing heat tracing and add allowances for all valves, flanges, and supports (typically 0.5-1m per fitting).

5. Frequently Asked Questions (FAQ)

Q1: What's included in fittings allowance?
A: Valves, flanges, supports, instruments, and any other components requiring additional heat tracing.

Q2: How much allowance per fitting?
A: Typically 0.5-1m per valve/flange, but consult Raychem engineering guidelines for specific applications.

Q3: Does this include spiral wrapping?
A: No, for spiral applications multiply pipe length by wrap factor (usually 1.1-1.5x) before adding fittings allowance.

Q4: What about heat loss calculations?
A: This calculates length only. Use Raychem design software for complete heat loss and cable sizing.

Q5: Should I add safety factor?
A: Yes, consider adding 10-15% to the calculated length for contingencies and future modifications.