Guidelines for routine periodic inspection and testing of cast iron Yankee and MG dryers

This Technical Information Paper (TIP) provides guidelines for routine periodic inspection and testing of cylindrical pressure vessels known as Yankee or MG dryers, used as rotating, steam-heated dryers in paper machines. The purpose of the paper is not to provide detailed inspection procedures but to provide an industry wide “benchmark” on the scope and frequency of recommended inspections and tests giving the mill a better understanding so they can better: plan outages, evaluate contractors and identify & rectify problems. This TIP covers dryers that have components that have been cast, fabricated (welded) or forged.