Rotational Lining Process

Rotational lining applies a layer of thermoplastic material onto the interior surface of a vessel, creating a mechanically bonded liner.

Step 1

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.

Step 2

 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.

Step 3

The vessel then goes through a cooling process to set the liner in place.

Step 4

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).

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