Boiler Headers

About Boiler Headers

Boiler Headers Explained

Boiler headers (also called manifolds) are thick-walled pressure vessels used to collect or distribute steam, water, or flue gases within a boiler system. They serve as central nodes in high-pressure piping systems and play a critical role in ensuring balanced flow and thermal efficiency.

What Are Boiler Headers?

A boiler header is a large cylindrical pipe (horizontal or vertical) that connects multiple smaller tubes or coils (e.g., economizer, water wall, superheater, or reheater coils). Headers manage the flow of fluid (steam or water) between different sections of the boiler.

Types of Boiler Headers:

Type	Function	Connected To
Steam Header	Collects or distributes steam	Superheater, turbines, process lines
Water Header	Distributes water to or collects from water wall tubes	Mud drum, downcomers
Economizer Header	Handles feedwater in/out of economizer coils	Feedwater lines
Superheater Header	Distributes saturated steam to superheater coils or collects superheated steam	Superheater tubes
Reheater Header	Involved in reheating steam	High- and low-pressure turbine circuits

Functions:

• Flow distribution or collection

• Pressure equalization

• Temperature regulation

• Facilitating inspection, control, and maintenance

• Preventing thermal shocks and flow imbalances

Construction Details:

• Material: High-grade alloy or carbon steel (e.g., SA-106 Gr B, SA-335 P11/P22, etc.)

• Design Pressure & Temp: Must meet ASME Section I or equivalent codes

• Ends: Typically flanged or beveled for welding

• Orientation: Horizontal (most common) or vertical

Boiler Header Locations:

• Water Wall Headers: At the top and bottom of the boiler furnace

• Superheater Headers: Before and after superheater coils

• Economizer Headers: At inlet and outlet of economizer banks

• Main Steam Header: Final outlet from the boiler to the plant/turbine

Maintenance and Inspection:

• Non-destructive testing (NDT): Ultrasonic, radiographic, magnetic particle

• Visual inspection of welds and joints

• Hydrostatic pressure testing

• Cleaning and descaling

Robust Material & Construction

Boiler Headers are fabricated using seamless carbon steel or alloy steel such as SA-106 and SA-335, offering reliability and durability under extreme conditions. With diameters up to 800 mm and advanced welding or flanged connections, they are designed to accommodate high-pressure environments and rigorous operational demands in industrial settings.


Precision Testing & Inspection

Each Boiler Header undergoes comprehensive hydrostatic, radiographic, and ultrasonic testing to assure integrity and safety. These inspections guarantee that every unit meets high standards for performance, minimizing risk and ensuring long service life in critical applications like power generation and steam distribution.


Custom Solutions for Diverse Applications

We offer customized Boiler Headers to fit unique design and operational workflows. Whether you need specific sizes, working pressures, fabrication standards, or surface finishes, our engineering team collaborates with clients to deliver tailored solutions for power plants, industrial boilers, and steam systems.