Your guide for boiler blowdown tanks
Boiler blowdown tanks are designed to prevent high pressure steam and water from entering into drains and possibly scalding someone. The tank allows the blowdown water to cool before discharging and allows the steam from the water to vent to the atmosphere.
Midwest Tank Co. boiler blow-off tanks are custom built and labeled in accordance with the ASME Code, Section VIII, Div. 1. These tanks carry the U stamp and are registered with the National Board of Boiler and Pressure Vessel Inspectors.
For quote requests, please fill out the information on the Boiler Blowdown tank sketch and send it to us.
See below for some of our more common tank sizes:
| Item # | Tank Size | Dim. (C) | Dim. (D) | Dim. (E) | Dim. (F) | Dim. (G) |
|---|---|---|---|---|---|---|
| BBT-24 x 36 | 24 x 36 in | 26 in | 9 in | 2 in | 5 in | 1 in |
| BBT-24 x 48 | 24 x 48 in | 32 in | 9 in | 2 in | 5 in | 1 in |
| BBT-30 x 36 | 30 x 36 in | 26 in | 11 in | 2 in | 5 in | 1 in |
| BBT-30 x 48 | 30 x 48 in | 32 in | 11 in | 2 in | 5 in | 1 in |
| BBT-36 x 54 | 36 x 54 in | 36 in | 14 in | 2 1/2 in | 6 in | 1 1/2 in |
| BBT-36 x 60 | 36 x 60 in | 39 in | 14 in | 2 1/2 in | 6 in | 1 1/2 in |
| BBT-42 x 66 | 42 x 66 in | 42 in | 15 1/2 in | 2 1/2 in | 6 in | 1 1/2 in |
| BBT-48 x 72 | 48 x 72 in | 45 in | 17 in | 2 1/2 in | 6 in | 1 1/2 in |
ASME-Certified Boiler Blowdown Tanks for Safe Steam Management
Midwest Tank Company designs and manufactures boiler blowdown tanks built to ASME Code, Section VIII, Division 1. Each tank carries the U stamp and is registered with the National Board of Boiler and Pressure Vessel Inspectors. These vessels are built to safely cool and vent high-pressure blowdown water and steam, protecting personnel and infrastructure from thermal hazards. Whether you need a standard size or a custom configuration, our team will help you select the right tank for your boiler system.
How Boiler Blowdown Tanks Work
During boiler operation, impurities accumulate and must be flushed out through blowdown. This discharge contains high-pressure steam and water that can be dangerous if released directly into drains. A blowdown tank captures this mixture, allowing steam to vent safely while the water cools before discharge. This process prevents scalding risks, protects plumbing systems, and ensures compliance with safety regulations.
Standard Sizes and Custom Options
Midwest Tank Company offers a range of custom blowdown tank sizes, built with your specific application in mind, with detailed dimensional specs to support proper installation. For quote requests, simply fill out the drawing form with your required tank size, inlet/outlet dimensions, and space constraints. Our team will provide a detailed drawing for approval once your order is placed.
Built for Industrial Safety and Compliance
Boiler blowdown tanks are essential for facilities operating high-pressure steam systems. Our ASME-certified tanks are trusted across industries including:
- Power Generation – Steam boilers and turbine systems
- Manufacturing – Process heating and steam-driven equipment
- Food Processing – Sanitary steam systems and CIP operations
- Chemical Plants – High-pressure boilers and thermal systems
- Institutional Facilities – Hospitals, universities, and government buildings
MWT delivers durable, code-compliant solutions that meet your safety and performance requirements.
FAQs
Why Do I Need a Boiler Blowdown Tank?
It prevents high-pressure steam and water from entering drains, reducing the risk of scalding and protecting plumbing systems.
Are Your Tanks ASME-Certified?
Yes. All blowdown tanks are built to ASME Section VIII, Division 1, carry the U stamp, and are registered with the National Board.
Can You Build Custom Sizes?
Absolutely. If your facility has unique space or pressure requirements, we can design a tank to match your specifications.