300155 - Miller PWHT Insulation Blanket for 36-Inch Pipe

Optimized Thermal Insulation for Induction Heating

The Miller 300155 Insulation Blanket is a specialized accessory designed for use in Post Weld Heat Treatment (PWHT) and preheating applications involving 36-inch diameter pipes. In the realm of induction heating, maintaining precise temperature control is paramount for achieving code-compliant mechanical properties in the weldment. This blanket serves as a critical thermal barrier, minimizing heat loss to the environment and ensuring that the energy generated by the induction cables is efficiently transferred to and retained within the workpiece.

Measuring 24 inches in width and 126 inches in length, this blanket is engineered to wrap around a standard 36-inch pipe with sufficient length to provide a secure overlap. This overlap is essential for preventing thermal leaks that could lead to cold spots or uneven heating profiles. The material construction is selected to withstand the high temperatures associated with stress relieving processes, typically ranging up to and beyond 1250°F depending on the alloy and procedure.

When used with systems like the Miller ProHeat 35, the insulation blanket performs a dual function. Firstly, it insulates the pipe to maintain the soak temperature required for hydrogen bake-out or stress relief. Secondly, it acts as a protective layer between the hot pipe surface and the liquid-cooled induction cables (or air-cooled blankets), preventing damage to the cables and ensuring the longevity of the heating equipment. This product is an indispensable component for field heat treatment technicians requiring reliable, repeatable results on large-bore piping.