Water-tube Package Boiler
Water-tube Package and Industrial Boilers
More than 5,000 units and 150 years of experience
Water-tube Package Boiler
Water-tube Package and Industrial Boilers
More than 5,000 units and 150 years of experience

B&W’s line of industrial package boilers represents more than 150 years of ingenuity and experience, providing dependable performance for a wide range of industries and applications.

Over the years, our industrial boiler configurations have been known by various model names, including FM, HCFM, PFM, PFI, PFT, TSSG® and others — D-type or O-type, single-drum or multi-drum. The unique designs offered by these various models provide our customers with flexible options and features to meet any steam generation demand.


B&W® boilers and Coen® burners: Integrated for reliability, efficiency and value

Through an agreement with John Zink Hamworthy Combustion (JZHC), B&W offers a comprehensive steam generation solution that pairs JZHC’s Coen® burners with B&W’s water-tube package boilers for refining, petrochemical, pulp and paper, mining, manufacturing, utilities and other industries.

Working together, the two companies offer streamlined
• Sourcing
• Engineering
• Manufacturing and
• Installation services
for a greatly simplified, high-performing, low-emissions steam generation system.

Equipment can include:
• Boiler
• Burner, including windbox, fuel skid and PRV skid
• Combustion air fan
• Ammonia injection grid (AIG)
• Selective catalytic reduction (SCR) reactor
• Economizer
• Deaerator
• Stack
• and more.

Backed by more than 5,000 units and 150 years of experience, B&W's water-tube package and industrial boilers have an established reputation for reliability and proven performance. They are engineered to meet unique capacity, space, fuel, emissions, transportation, installation and other requirements. They offer reliable power with low emissions, low auxiliary power requirements, simple operation, low maintenance and can be tailored for a variety of fuel options, including natural gas. Coen burners are installed in more than 15,000 plants worldwide and are engineered for optimized steam production and emissions control.

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Design Features and Benefits of our Water-tube Package Boilers

Furnace wall water cooling – eliminates refractory and related maintenance

Gas-tight setting membrane – inhibits dew-point sulfur corrosion and outages caused by gas leaks

Rugged steel-based frame – supports boiler and allows jacking and skidding

Outer lagging – galvanized, weather-tight for outdoor installations

Drum internals – ensure positive circulation, low moisture, high steam purity

Larger tube diameter (2.5 in. [6.35 cm] tubes spaced 1 in. [2.54 cm] apart) – contributes to a faster load response and helps prevent membrane thermal cracking

Grooved tube seats – protect against leaks during transportation and throughout operation

Solid membraned division wall – prohibits furnace gases from bypassing generating tubes

Water wash troughs and drains – facilitates offline water-washing

Inverted loop, fully drainable superheaters – saves time during startup while minimizing the chances of over-heat during the pressure-raising stage.

Sootblowers – for effective cleaning of the superheater, generating bank and other heat transfer surfaces

B&W Package Boiler Illustration

B&W package boilers offer:

  • Reliable steam generation
  • Low auxiliary power requirements
  • Low emissions
  • Simple operation and low maintenance
  • Operational flexibility – high turndown and fast load ramping

Capacities to Meet the Most Demanding Requirements

Within a range of standard sizes and capacities, our industrial water-tube package boilers are custom-engineered to each project’s unique specifications for varying inputs and desired outputs.

All our designs feature the high levels of quality, reliability and efficiency for which B&W is known.

  Boilers   Capacity Range* (lb/h) Length   Width Height   Drum Size
 Boiler 9 

 FM 9-22



7 ft 7 in
8 ft 11 in
9 ft 11 in
11 ft 3 in
12 ft 7 in
13 ft 11 in
15 ft 3 in
16 ft 7 in
17 ft 11 in


10 ft 2-7/8 in 

12 ft 4 in

36 in Steam Drum

24 in Lower Drum

 Boiler 10  FM 10-52
FM 101-88



 16 ft 7 in
17 ft 11 in
19 ft 3 in
20 ft 7 in
21 ft 11 in
24 ft 7 in
24 ft 3 in


10 ft 10-5/8 in

11 ft 2-3/8 in

13 ft 6 in

36 in Steam Drum

24 in Lower Drum

 Boiler 103 FM 103-70

21 ft 3-3/16 in
23 ft 11-3/16 in
26 ft 7-3/16 in
29 ft 11 in


11 ft 9 in

13 ft 9-3/4 in

 42 in Steam Drum

24 in Lower Drum
(Optional 30 in)

 Boiler 106 FM 106-79
FM 117-88


23 ft 11-3/16 in
26 ft 7-3/16 in
29 ft 3-3/16 in
26 ft 7-3/16 in
29 ft 3-3/16 in


11 ft 9 in

11 ft 11-1/4 in

14 ft 3 in

15 ft 4-1/2 in

 48 in Steam Drum

24 in Lower Drum
(Optional 30 in)

 Boiler 120 FM 120-97
FM 160-124 



29 ft 3-3/16 in
33 ft 7-3/16 in
37 ft 3-3/16 in
37 ft 3-3/16 in


12 ft 5-3/8 in

14 ft 0-3/8 in

16 ft 10-1/2 in

20 ft 0-1/2 in

54 in Steam Drum
(Optional 60 in for FM 160-124)

24 in Lower Drum
(Optional 30 in)

   Steam Capacity  Steam Pressure Steam Temperature 

200,000 to 350,000 lb/h
(90.6 to 158.6 T/h)


 to 1250 psig (7.2 MPa)  to 825F (441C)

200,000 to 600,000 lb/h
(90.6 to 271.8 T/h)


 to 1800 psig (12.4 MPa)  to 900F (482C)


300,000 to 1,200,000 lb/h
(135.9 to 543.6 T/h)


 to 2400 psig (16.5 MPa)  to 1006F (540C)

1. All package boilers are of membrane construction.
2. Because of B&W’s constant effort to improve design, equipment supplied may differ slightly from that described above.
* Steam capacities shown are saturated steam. Capacities will vary depending on conditions and limitations.

Metric Conversions:
inches x 25.4 = mm
inches x 2.54 = cm
feet x 0.3048 = m
lb/h x 0.000453 = T/h
lb/h x 0.000126 = kg/s

Package Boiler Designs

We can provide both D-Style and O-Style boiler configurations.


B&W D-Style Boiler
  • One steam drum and one lower drum
  • Drums centered over each other with furnace offset to one side
  • One generating bank


B&W O-Style Boiler
  • One steam drum and one lower drum 
  • Drums centered over each other with furnace in center of boiler
  • Two generating banks


Capacity 10,000 to 1,200,000 lb/hr (4.5 to 544.2 T/hr) 
Size/Space Various modular designs for shop and/or field assembly
Temperature Saturated to 1005F (540C)
Design Pressure 250 to 2400 psig (1.7 to 16.5 MPa)
Fuel Liquid or gaseous fuels such as oil, natural gas, carbon monoxide (CO), blast furnace gas (BFG), coke oven gas (COG), and other byproduct liquid and gaseous fuels
Air/Water Treatment Emissions and water-side deposition control systems

Our industrial water-tube package boilers have been installed in a variety of facilities providing steam for varied applications, including:

• Refining and petrochemical
• Utility power
• Pulp and paper
• Chemical and pharmaceutical
• Universities and institutions
• Food processing
• Metals and mining
• Composite and carbon fiber
• Carbon black
• Wood products
• and many more

B&W Boiler Delivery

B&W Boilers

B&W Innovation


MultiCirc (patent-pending)

Our multi-circulation systems accommodate lower-quality feedwater and maximize thermal efficiency while maintaining reliability by minimizing boiler tube internal scaling.

Connection Ready Industrial Boilers

Connection Ready

The boiler and auxiliary equipment modules, depending on size, can be shop mounted to skids where they are pre-wired and piped to accelerate transportation and reduce field installation times.

Heros Boilers Elevated Drum

Elevated Drum

Our elevated-drum design is used for drum retention times of 5 minutes or more from normal water level to low water fuel cutout. Additionally, this design is utilized where shipping limitations exist as it allows for a more symmetrical load with the upper steam drum shipped separately from the boiler and installed onsite.

Auxiliary Equipment

B&W Boiler
• Economizers
• Burners
• Controls
• Forced draft fan and drives
• Flues and ducts
• Stacks
• Deaerators, feedwater pump sets
• Oil pumps
• Heater sets
• Post-combustion emissions control systems
• Code piping
• Balance of plant

Aftermarket Support

B&W Boilers
B&W’s network of field service engineers can provide services ranging from routine inspections and controls tuning to engineering studies, low emissions conversions or new control systems.

Success Stories

Elevated three-drum unit for IRPC Clean Power Co., Ltd. in Rayong, Thailand

To meet the project’s steam drum retention requirements, we engineered and delivered an elevated three-drum unit for the combined heat and power plant’s use in supplying steam to a neighboring factory.                               

High-capacity unit for U.S. refinery                                                      

Refinery Hero Boiler
We engineered and supplied a 300,000 lb/hr (136,100 kg/hr) shop-assembled unit, which was shipped by barge and field-installed. The project scope also included all boiler auxiliaries, fans, economizer, valves, instrumentation and installation of all equipment on the boiler island.

Single-drum modular units for oil sands project in Alberta, Canada

Oil Sands Heros Boilers
Challenged to provide a solution for highly reliable steam generation at high pressure with ultra-low NOx emissions, minimized blowdown for zero liquid discharge requirements, multifuel usage, and low field erection and maintenance costs, we supplied eight high-performing modularized single-drum units.

Custom-branded units for U.S. universities

Heros Boiler
In addition to predefined specifications for operating conditions, our industrial boilers can be delivered featuring designated colors and logos. We recently supplied two U.S. universities with multiple custom-branded units, each capable of providing approximately 80,000 lb/hr (36,300 kg/hr) of saturated steam with a design pressure of 250 psig (1.7 MPa).

Installation of lower drum heating coils on industrial boilers reduces fuel, costs and emissions

Valent BioSciences

Valent BioSciences LLC (VBC) - Iowa, USA

B&W designed and fabricated lower (mud) drum heating coils for two industrial boilers. The coils allow the auxiliary, idle unit to maintain a hot standby condition using steam from the operating boiler.