Rotational Lining Process
Rotational lining applies a layer of thermoplastic material onto the interior surface of a vessel, creating a mechanically bonded liner.
The first step of the process is to prepare the interior surface of the vessel to white metal. Next, the vessel is mounted to a multi-axis rotational lining machine. Thermoplastic resin is placed inside the vessel.
The vessel is rotated inside of an oven. As the vessel rotates, the polymer becomes molten and forms an even layer across all internal surfaces.
The vessel then goes through a cooling process to set the liner in place.
The caps are removed from the ends of the vessel. Flange faces are machined to provide a smooth sealing surface. Liner integrity is then validated using ultrasonic thickness gauges and spark testing. Lastly, paint is applied to the exterior of the vessel (optional).