5.0 ASTM Tubing Specifications Outside Diameter/Wall Thickness

It is important to understand that both of the above can affect the ferrule(s) ability to seal on the tubing. It is recommended to order tubing manufactured to the plus (+) side of the outside diameter tolerance. Wall thickness variations can affect pressure ratings and flow characteristics.

The following tables should explain the allowable variations.

ASTM Dimensional Specifications for Tubing

Table-A: Permissible Variations in Outside Diameter

Table-B: Permissible Variations in Wall Thickness

Table-C: Permissible Variations in Wall Thickness for ASTM B68 and ASTM B75 cold drawn copper tubes

Table-A Permissible Variations in Outside Diameter

Table-B: Permissible Variations in Wall Thickness

Table-C: Permissible Variations in Wall Thickness for ASTM B68 and ASTM B75 cold drawn copper tubes