Bryan Boilers Tube Steel Boilers User Manual

Form No. 5900-1

Bryan “Flexible Water Tube”

Boiler Comparison Guide

Flexible Tube Steel Boilers

Firetube Steel Boilers

Cast Iron Boilers

(Rev. 7/08)

BRYAN® BOILERS

Originators of the “Flexible Water Tube” design

Boiler Comparison Guide

Firetube

steel boilers

Bryan fl exible water

tube steel boilers

Installation

Minimal assembly required for new building installations x x x x
Will pass through standard doorway in existing buildings x x
Right hand or left hand construction x

35
Estimated years of service life to 25 35 ?
40

Full 5 sq ft heating surface per boiler HP or more x ? ? ?

Cast iron boilers

Competitive water

tube boilers

Space Requirements
Minimal fl oor space needed to set and service x ? x ?

Maintenance

No major disassembly required for cleaning x
No welding or rolling required to remove and replace tubes x x
No repairs to damage caused by thermal shock x
25 year non-prorated warranty x

Effi ciency

Highest operating effi ciency based on combustion effi ciency x ? ? ?
and burner motor horsepower
Close match to specifi c load based on numerous sizes available x ? ? ?
Size range from 6 HP through 500 HP x x ? ?

Fuels

Oil, gas or gas/oil x x x x
Atmospheric gas x x
Each of above available with electric if desired x

Specialty applications

Large buildings x x x x
High-rise buildings regardless of boiler location x x x
Process steam, high pressure x x x
Process steam, low pressure x x x x
Low temperature return water application not requiring external pump x

*

Replacement of sections requires extensive labor and downtime.

*

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Boiler Comparison Guide

Selecting the Proper Boiler

If you’re an engineer, an architect, a mechanical
contractor or a building owner, selecting or specifying
the right boiler is probably one of your many concerns.
Steel? Cast iron? Watertube? Firetube? With all the
confl icting opinions, reports and literature in circulation,
it’s no easy task.

Economy

Installation costs. Because cast iron boilers come as

sectional units, substantial time-consuming assembly is
required. Steel boilers are shipped completely fi nished
and may require that walls be opened in existing buildings
or new buildings which have already been enclosed.
Bryan fl exible water tube steel boilers, however, are
prepackaged units that may be easily disassembled
(“Knockdown™”) to precisely the degree necessary.

Service life. The best estimates we have on boiler
life expectancy are thirty-fi ve years for cast iron units
and twenty-fi ve years for fi retube steel models. With
many boilers still on the job after forty to fi fty years of
service, Bryan’s fl exible water tube steel design has
demonstrated longevity equal to or better than that of
either alternative.

At Bryan, we understand the problem. That’s why we’ve
put together this guide. It’s a summary of how our fl exible
water tube boilers compare to fi retube, cast iron and
other water tube boilers in several important areas. We
think you’ll fi nd it helpful.

40 years

Bryan

fl exible

water

tube

boilers

35 years

cast

iron

boilers

25 years
Firetube

steel

boilers

Boiler Longevity*

*Competitive fl exible tube boilers not shown

due to inadequate experience.

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