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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 1Unalloyed titanium, low oxygen,

1.1.2 Grade 2Unalloyed titanium, standard oxygen,

1.1.2.1 Grade 2HUnalloyed titanium (Grade 2 with 58 ksi minimum UTS),

1.1.3 Grade 3Unalloyed titanium, medium oxygen,

1.1.4 Grade 5Titanium alloy (6 % aluminum, 4 % vanadium),

1.1.5 Grade 7Unalloyed titanium plus 0.12 to 0.25 % palladium, standard oxygen,

1.1.5.1 Grade 7HUnalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi minimum UTS),

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

1.1.7 Grade 11Unalloyed titanium plus 0.12 to 0.25 % palladium, low oxygen,

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

1.1.9 Grade 13Titanium alloy (0.5 % nickel, 0.05 % ruthenium), low oxygen,

1.1.10 Grade 14Titanium alloy (0.5 % nickel, 0.05 % ruthenium), standard oxygen,

1.1.11 Grade 15Titanium alloy (0.5 % nickel, 0.05 % ruthenium), medium oxygen,

1.1.12 Grade 16Unalloyed titanium plus 0.04 to 0.08 % palladium, standard oxygen,

1.1.12.1 Grade 16HUnalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi minimum UTS),

1.1.13 Grade 17Unalloyed titanium plus 0.04 to 0.08 % palladium, low oxygen,

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

1.1.15 Grade 19Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),

1.1.16 Grade 20Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 to 0.08 % palladium,

1.1.17 Grade 21Titanium alloy (15 % molybdenum, 3 % aluminum, 2.7 % niobium, 0.25 % silicon),

1.1.18 Grade 23Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI),

1.1.19 Grade 24Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 to 0.08 % palladium,

1.1.20 Grade 25Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 to 0.8 % nickel and 0.04 to 0.08 % palladium,

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

1.1.21.1 Grade 26HUnalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi minimum UTS),

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

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

1.1.24 Grade 29Titanium alloy (6 % aluminum, 4 % vanadium with extra low interstitial elements (ELI)) plus 0.08 to 0.14 % ruthenium,

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

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

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

1.1.28 Grade 37Titanium alloy (1.5 % aluminum), and

1.1.29 Grade 38Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron).

Note 1 – 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 added in response to a user association request based on its study of over 5200 commercial Grade 2, 7, 16, and 26 test reports, where over 99 % met the 58 ksi minimum UTS.

1.2 Pipe 8 in. NPS (nominal pipe size) and larger is most frequently custom made for an order. In such cases, the purchaser carefully should consider the applicability of this specification. Since the pipe is custom made, the purchaser may choose a wall thickness other than those in Table 1 to meet specific operating conditions. The purchaser may also be better served to specify only the portions of this specification that are required to meet the operating conditions (for example, annealing, flattening test, chemistry, properties, etc.).

1.3 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements may be invoked by the purchaser, when desired, by specifying in the order.

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Product Details

Published:
05/15/2008
Number of Pages:
9
File Size:
1 file , 110 KB
Redline File Size:
2 files , 210 KB