Mã số: ASTM B251

COPPER AND COPPER-ALLOY TUBE SUPPLIED UNDER SPECIFICATIONS B68, B75

TABLE 1: Wall Thickness Tolerance for Copper and Copper-Alloy Tube
(Applicable to Specification B68, B75, and B743)
Maximum deviation at any point: The following tolerances are plus and minus; if tolerances all plus or
all minus are desired, double th values given.

A: When round tube is ordered by outside and inside diameters, the maximum plus and minus deviation of the wall thickness
from the nominal at any point shall not exceed the values given in the table by more than 50%.
B: Percent of specified wall expressed to the nearest 0.001 in.

TABLE 2: Average Diameter Tolerances for Copper and Copper-Alloy TubeA
(Applicable to Specification B68, B75, and B743)

A: Applicable to inside or outside diameter