Boiler Headers
Boiler headers are manifolds that tie multiple steam mains to one boiler, or multiple boilers to one or more steam mains. Boiler headers must be properly trapped in order to prevent carryover from the boiler from being introduced into the steam mains. Boiler carryover consists of any water solids that are carried out of the boiler and launched into the system.
Installation Guidelines
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Roll your cursor over the red dots for more information.
Trap Requirements
- Remove large slugs of condensate carryover from the header as soon as they appear.
- Resist damage from water hammer.
- Have the capacity to handle dirt well.
- Operate efficiently on very light loads.
- Have an extended service life.
- Fail open.
The inverted bucket (IB) trap with a large vent meets all of these requirements best. On superheated steam, use an IB trap with burnished valve and seat plus an internal check valve, and provide at least 3 feet (.6 m) of non-insulated drip leg ahead of the trap.
MATH |
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To determine trap capacity necessary for installation:
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Safety Factor |
| A 1.5:1 safety factor is recommended for selecting traps for boiler header applications |
Load Calculation |
| Formula Required trap capacity = safety factor x load connected to system x anticipated carryover as a percentage. (typically 10%) |
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Example 1.5 x 50,000 lbs/hr x 0.10 = 7,500 lbs/hr 1.5 x 20,000 kg/h x 0.10 = 3,000 kg/h |
