1.1 This specification covers the requirements for 23 grades of titanium and titanium alloy tubing intended for surface condensers, evaporators, and heat exchangers, as follows:

1.1.1 Grade 1Unalloyed titanium,

1.1.2 Grade 2Unalloyed titanium,

1.1.3 Grade 3Unalloyed titanium,

1.1.4 Grade 7Unalloyed titanium plus 0.12 to 0.25 % palladium,

1.1.5 Grade 9Titanium alloy (3 % aluminum, 2.5 % vanadium),

1.1.6 Grade 11Unalloyed titanium plus 0.12 to 0.25 % palladium,

1.1.7 Grade 12Titanium alloy (0.3 % molybdenum, 0.8 % nickel),

1.1.8 Grade 13Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.9 Grade 14Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.10 Grade 15Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.11 Grade 16Unalloyed titanium plus 0.04 to 0.08 % palladium,

1.1.12 Grade 17Unalloyed titanium plus 0.04 to 0.08 % palladium,

1.1.13 Grade 18Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.04 to 0.08 % palladium,

1.1.14 Grade 26Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

1.1.15 Grade 27Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

1.1.16 Grade 28Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,

1.1.17 Grade 30Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.18 Grade 31Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.19 Grade 33Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),

1.1.20 Grade 34Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),

1.1.21 Grade 35Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),

1.1.22 Grade 36Titanium alloy (45 % niobium), and

1.1.23 Grade 37Titanium alloy (1.5 % aluminum).

1.2 Tubing covered by this specification shall be heat treated by at least a stress relief as defined in .

1.3 &inch-pound-units;