Corrosion allowance

The thickening of technical components is referred to as a corrosion allowance , which protects them from rust , rust perforation , general corrosion and also vibration corrosion .

In particular, the dimensioning of pressure vessels contains this corrosion allowance.

The background to this is the material erosion due to corrosion - e.g. B. Weather influence - on the surfaces. This material removal is difficult or difficult to determine quantitatively.

In order to ensure a long service life for the component, a further surcharge is added to the calculated wall thickness, which guarantees the strength and also contains the safety factors.

From practice: Pipes are standardized according to DIN / ISO / ANSI in different, graduated dimensions and wall thicknesses. When designing a pipeline system, the pipe with the smallest wall thickness would guarantee strength, but the next larger one or the next but one is used to counter component failure soon under adverse circumstances (sea, salt water, abrasion, leaching, etc.).

literature

• Günter Wossog (Ed.): Handbook of pipeline construction. Volume II calculation, 2nd edition, Vulkan Verlag, Essen 2002, ISBN 3-8027-2723-1 .
• Günter Wossog: FDBR pocket book on pipeline technology. Volume 1, Vulkan Verlag, Essen, ISBN 3-8027-2732-0 .

Web links

• EXTENDING THE SERVICE LIFE OF PRINT EQUIPMENT THROUGH INCREASED INITIAL PRINT TESTING (accessed January 28, 2019)
• Stainless steel in free-standing chimneys (accessed January 28, 2019)
• Guidelines for Corrosion Protection and Coating Systems (accessed on January 28, 2019)