1.1 This specification covers the requirements for 33 grades of titanium and titanium alloy welded pipe intended for general corrosion resisting and elevated temperature service as follows:
1.1.1 Grade 18212;Unalloyed titanium, low oxygen,
1.1.2 Grade 28212;Unalloyed titanium, standard oxygen,
1.1.2.1 Grade 2H8212;Unalloyed titanium (Grade 2 with 58 ksi minimum UTS),
1.1.3 Grade 38212;Unalloyed titanium, medium oxygen,
1.1.4 Grade 58212;Titanium alloy (6 % aluminum, 4 % vanadium),
1.1.5 Grade 78212;Unalloyed titanium plus 0.12 to 0.25 % palladium, standard oxygen,
1.1.5 Grade 7H8212;Unalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi minimum UTS),
1.1.6 Grade 98212;Titanium alloy (3 % aluminum, 2.5 % vanadium),
1.1.7 Grade 118212;Unalloyed titanium plus 0.12 to 0.25 % palladium, low oxygen,
1.1.8 Grade 128212;Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
1.1.9 Grade 138212;Titanium alloy (0.5 % nickel, 0.05 % ruthenium), low oxygen,
1.1.10 Grade 148212;Titanium alloy (0.5 % nickel, 0.05 % ruthenium), standard oxygen,
1.1.11Grade 158212;Titanium alloy (0.5 % nickel, 0.05 % ruthenium), medium oxygen,
1.1.12 Grade 168212;Unalloyed titanium plus 0.04 to 0.08 % palladium, standard oxygen,
1.1.12.1 Grade 16H8212;Unalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi minimum UTS),
1.1.13 Grade 178212;Unalloyed titanium plus 0.04 to 0.08 % palladium, low oxygen,
1.1.14 Grade 188212;Titanium alloy (3 % aluminum, 2.5 % vanadium plus 0.04 to 0.08 % palladium),
1.1.15 Grade 198212;Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),
1.1.16 Grade 208212;Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 to 0.08 % palladium,
1.1.17 Grade 218212;Titanium alloy (15 % molybdenum, 3 % aluminum, 2.7 % niobium, 0.25 % silicon),
1.1.18 Grade 238212;Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI),
1.1.19 Grade 248212;Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 to 0.08 % palladium,
1.1.20 Grade 258212;Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 to 0.8 % nickel and 0.04 to 0.08 % palladium,
1.1.21 Grade 268212;Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.21.1 Grade 26H8212;Unalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi minimum UTS),
1.1.22 Grade 278212;Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.23 Grade 288212;Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,
1.1.24 Grade 298212;Titanium alloy (6 % aluminum, 4 % vanadium with extra low interstitial elements (ELI)) plus 0.08 to 0.14 % ruthenium,
1.1.25 Grade 338212;Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium), and
1.1.26 Grade 348212;Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium).
1.1.27 Grade 358212;Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.28 Grade 378212;Titanium alloy (1.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.29 Grade 388212;Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron).
Note 18212;H grade material is identical to the corresponding numeric grade (that is, Grade 2H = Grade 2) except for the higher guaranteed minimum UTS, and may always be certified as meeting the requirements of its corresponding numeric grade. Grades 2H, 7H, 16H, and 26H are intended primarily for pressure vessel use.
The H grades were ad......
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