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TAPPI TIP0402-16
- Guidelines for Iion and Nondestructive Examination of Paper Machine Dryers
- standard by Technical Association of the Pulp and Paper Industry, 01/24/2006
- Publisher: TAPPI
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This Technical Information Paper (TIP) provides guidelines for inspecting cylindrical pressure vessels used as rotating, steam-heated dryers in paper machines. Unheated cylinders of similar construction like vacuum dryers may also be covered by these guidelines. However, Yankee dryers are not covered.
The guidelines are limited to inspection of the dryers themselves: they do not pertain to over-pressure protection devices, external steam and condensate piping systems, bearings and drive components, or doctoring devices associated with the dryers. Nevertheless, inspectors should not ignore evidence or conditions on these components that could pose a safety threat or compromise the runnability and reliability of the dryers and dryer sections.
The guidelines are limited to inspection of the dryers themselves: they do not pertain to over-pressure protection devices, external steam and condensate piping systems, bearings and drive components, or doctoring devices associated with the dryers. Nevertheless, inspectors should not ignore evidence or conditions on these components that could pose a safety threat or compromise the runnability and reliability of the dryers and dryer sections.
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