Scope

This specification covers the requirements for 28 grades of titanium and titanium alloy tubing intended for surface condensers, evaporators, and heat exchangers, as follows:

Grade I-UNS R50250. Unalloyed titanium

Grade 2-UNS R50400. Unalloyed titanium

Grade 2H-UNS R50400. Unalloyed titanium(Grade 2 with 58 ksi(400 MPa)minimum UTS)

Grade 7-UNS R52400. Unalloyed titanium plus 0.12 to 0.25% palladium

Grade 7H-UNS R52400. Unalloyed titanium plus 0.12 to 0.25% palladium(Grade 7 with 58 ksi(400 MPa)minimum UTS)

Grade 9-UNS k56320. Titanium alloy(3% aluminum, 2.5% vanadium)

Grade 12-UNS R53400. Titanium alloy(0.3% molybdenum,0.8% nickel)

Size

Titanium Seamless tube: OD: 2 - 177.8mm W.T: 0.5 - 40mm

Titanium Weld Tube: O.D: 6.35 - 177.8mm W.T: 0.5 - 8mm

Test or inspection

Ultrasonic test(UT),X-ray test,Hardness test,Bending test,etc.

Surface

Polishing,Acid pickling,Sandblasting

Materials and Manufacture

1.Seamless tube shall be made from hollow billet by any cold reducing or cold drawing process that will yield a product meeting the requirements of this specification. Seamless tube is produced with a continuous periphery in all stages of manufacturing operations.

2.Welded tube shall be made from annealed,flat-rolled product by an automatic arc-welding process or other method of welding.Welded tubing shall be heat treated by at least a stress relief after forming and welding.Use of filler material is not permitted.

3.Welded/cold worked tube (WCS) shall be made from welded tube manufactured as specified in 2. The welded tube shall be sufficiently cold worked to final size in order to transform the cast weld microstructure into a typical equiaxed microstructure in the weld upon subsequent heat treatment.The product shall meet the requirements for seamless tube of this specification.

4.Grades 9,18 and 28,which,at the option of the purchaser,can be furnished in either the annealed or the cold worked and stress relieved condition,defined as at a minimum temperature of 600°F (316°C) for not less than 30 min.

Application

Heat changer, Condensers, Petrochemical,Pressure Vessel Alkaline Media,Inorganic Salt Solutions,Organic Chemicals,Organic Acids,Hydrogen Sulfide,Liquid Metals Chlorine Chemicals,Hydrochloric Acid,Phosphoric Acid,Sea Water,Sulfuric Acid,Nitric Acid,Anodizing and Oxidation Treatments

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