1.1 This specification covers the requirements for 34 grades of titanium and titanium alloy seamless pipe intended for general corrosion resisting and elevated temperature service as follows:
1.1.1 Grade 1—UNS R50250. Unalloyed titanium,
1.1.2 Grade 2—UNS R50400. Unalloyed titanium,
1.1.2.1 Grade 2H—UNS R50400. Unalloyed titanium (Grade 2 with 58 ksi (400 MPa) minimum UTS),
