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Technical Information: Tubes

 

Tube thickness

On the page Permissible Pressure for Stainless Steel Tubes the nominal pressure in relation to the tube wall thickness is specified. The nominal pressure is calculated with the following formula:

Formula for tube thickness

K: Tensile Strength [N/mm2]
DA: Ø Outside [mm]
DI: Ø Inside [mm]
S: Safety Correction Value

This formula is used in DIN ISO 10763 and is takes the tangential forces on the inside of the tube into account. Using DIN ISO 1073 in general results in reduced nominal pressures compared with DIN 2413. Using DIN ISO 10763 is recommended due to the fact that the results are more precise which is essential for a 4-fold system safety.


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