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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 1—Unalloyed titanium, low oxygen,
1.1.2 Grade 2—Unalloyed titanium, standard oxygen,
22.214.171.124 Grade 2H—Unalloyed titanium (Grade 2 with 58 ksi minimum UTS),
1.1.3 Grade 3—Unalloyed titanium, medium oxygen,
1.1.4 Grade 5—Titanium alloy (6 % aluminum, 4 % vanadium),
1.1.5 Grade 7—Unalloyed titanium plus 0.12 to 0.25 % palladium, standard oxygen,
1.1.5 Grade 7H—Unalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi minimum UTS),
1.1.6 Grade 9—Titanium alloy (3 % aluminum, 2.5 % vanadium),
1.1.7 Grade 11—Unalloyed titanium plus 0.12 to 0.25 % palladium, low oxygen,
1.1.8 Grade 12—Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
1.1.9 Grade 13—Titanium alloy (0.5 % nickel, 0.05 % ruthenium), low oxygen,
1.1.10 Grade 14—Titanium alloy (0.5 % nickel, 0.05 % ruthenium), standard oxygen,
1.1.11Grade 15—Titanium alloy (0.5 % nickel, 0.05 % ruthenium), medium oxygen,
1.1.12 Grade 16—Unalloyed titanium plus 0.04 to 0.08 % palladium, standard oxygen,
126.96.36.199 Grade 16H—Unalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi minimum UTS),
1.1.13 Grade 17—Unalloyed titanium plus 0.04 to 0.08 % palladium, low oxygen,
1.1.14 Grade 18—Titanium alloy (3 % aluminum, 2.5 % vanadium plus 0.04 to 0.08 % palladium),
1.1.15 Grade 19—Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),
1.1.16 Grade 20—Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 to 0.08 % palladium,
1.1.17 Grade 21—Titanium alloy (15 % molybdenum, 3 % aluminum, 2.7 % niobium, 0.25 % silicon),
1.1.18 Grade 23—Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI),
1.1.19 Grade 24—Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 to 0.08 % palladium,
1.1.20 Grade 25—Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 to 0.8 % nickel and 0.04 to 0.08 % palladium,
1.1.21 Grade 26—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
188.8.131.52 Grade 26H—Unalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi minimum UTS),
1.1.22 Grade 27—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.23 Grade 28—Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,
1.1.24 Grade 29—Titanium alloy (6 % aluminum, 4 % vanadium with extra low interstitial elements (ELI)) plus 0.08 to 0.14 % ruthenium,
1.1.25 Grade 33—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium), and
1.1.26 Grade 34—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium).
1.1.27 Grade 35—Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.28 Grade 37—Titanium alloy (1.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.29 Grade 38—Titanium 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 requrest based on its study of over 5200 commercial Grade 2, 7, 16, and 26 test reports, where over 99 % met the 58 ksi miniumum 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 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.
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
AWS StandardAWS A5.16/A5.16M-2007 Specification for Titanium and Titanium Alloy Welding Electrodes and Rods
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
B600 Guide for Descaling and Cleaning Titanium and Titanium Alloy Surfaces
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E539 Test Method for Analysis of Titanium Alloys by X-Ray Fluorescence Spectrometry
E1409 Test Method for Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion
E1417 Practice for Liquid Penetrant Testing
E1447 Test Method for Determination of Hydrogen in Titanium and Titanium Alloys by Inert Gas Fusion Thermal Conductivity/Infrared Detection Method
E1941 Test Method for Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis
E2371 Test Method for Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry (Performance-Based Test Methodology)
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals
ANSI/ASME StandardsASME Boiler and Pressure Vessel Code Section VIII B 36.10 Carbon, Alloy and Stainless Steel Pipes B 36.19M-1985 Stainless Steel Pipe B.1.20.1 Pipe Threads, General Purpose (Inch)
ICS Number Code 77.150.50 (Titanium products)
UNSPSC Code 31311510(Titanium welded or brazed pipe assemblies)
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ASTM B862-06b, Standard Specification for Titanium and Titanium Alloy Welded Pipe, ASTM International, West Conshohocken, PA, 2006, www.astm.orgBack to Top