Coating the internals of large bore pipework.

Corrosion resistant pipework is used extensively throughout the chemical process industry. The most common route is for carbon steel to be lined with a “loose“ PTFE sleeve (liner). The problems start when the nominal bore goes beyond 300 mm. The lining cost becomes very high, the lead time is measured in weeks and there is a limitation on vacuum duty at temperatures much above ambient. In addition, the stresses set up where the PTFE liner is flared out over the flange face can result in premature failure of the liner. Up until now, the only options open to the industry have been glass lined carbon steel, or exotic metals. Both are expensive with equally long lead times. Glass has to be treated with especial care, and exotic metals are not always quite as versatile in terms of their corrosion performance.

Impreglon UK has the solution in MagnaCoat 1508 applied to a thickness of 250 microns. The pipe spool shown, 400 mm nominal bore by 2000 mm long, was coated internally and across the flange faces. MagnaCoat 1508 provided the required corrosion performance, which combined with MagnaCoat’s excellent adhesion, satisfied the client’s process needs.

Add in a cost and lead time saving and you can see why there is great interest in MagnaCoat 1508 for this type of application.