Introduction
A Blowdown Tank is a critical boiler accessory designed to safely receive, cool, and neutralize hot water and steam discharged during boiler blowdown operations. Blowdown tanks are essential for protecting personnel, piping systems, and the environment while ensuring optimal boiler performance and water quality management.
At NORDSTONE., we design and manufacture ASME-certified blowdown tanks with robust construction, precision thermal design, and compliance with international standards, including ASME Section VIII, NB, and PED certification.
What is a Blowdown Tank?
A blowdown tank is a pressurized or atmospheric vessel that receives hot water and flash steam discharged during boiler blowdown. By allowing controlled cooling, steam venting, and sediment collection, the tank protects downstream piping and equipment from thermal shocks and overpressure, while preventing hazardous conditions near the boiler system.
Key components include:
- Pressure or atmospheric vessel shell with corrosion-resistant construction
- Inlet connections from the boiler blowdown line
- Vent connection for flash steam release
- Drain outlet for safe disposal of cooled water
- Manways for inspection and cleaning
- Instrumentation ports for temperature and level monitoring
- Optional cooling coil or heat exchanger for temperature control
Blowdown tanks are essential for ensuring boiler safety, maintaining water quality, and complying with environmental regulations.
