Titanium welded pipes are processed from titanium coil, and longitudinally welded by TIG process without metal filler, so it guarantees the homogeneity of the welded area. what is more, due to the advantages such as evenness of the wall thickness, each tube’s part having the same mechanical properties of the initial coils, more and more process equipment manufactory prefer to choose titanium welded tube rather than seamless for their project.
Grade 2 is pure titanium most used. The best combination of strength, ductility and weldability.
Table of Contents
- Specifications/Technical Parameters
- Chemical Composition Of ASTM B862 Grade 2 Titanium Welded Pipe
- Tensile Strength Of Titanium Welded Pipe
- Application Of ASTM B862 Grade 2 Titanium Welded Pipe
- Characteristics of titanium
- Manufacturing Process Of ASTM B862 Grade 2 Titanium Welded Pipe
|Product Description||Grade 2 Titanium Welded Pipe|
|OD Range (mm)||φ5~60.3|
|WT Range (mm)||0.5~5.0|
Outside Diameter & Tolerance
Wall thickness & Tolerance
Some sizes requested by clients
|Titanium tubing are delivered in straight lengths or as U-bent tubing. Titanium spiral tubing, titanium capillary tubing are available by requirement. Length: 4000mm; 6000mm; 12000mm; Multi-length and short cutting can be provided. Max developed length: 20 meters.|
|Features: low density, high specific strength, excellent corrosive resistance, no rust, good thermal stability, good thermal conductivity, biological features, plasticity, etc.|
|Inspection & Test: ultrasonic testing (UT), electric non-destructive testing (ET), flaring test, hydrostatic test, flattening test, visual surface inspection, dimensional inspection, tensile properties inspection and chemical elements analysis.|
Chemical Composition Of ASTM B862 Grade 2 Titanium Welded Pipe
|ELEMENT||Chemical Composition %|
|GRADE 1||GRADE 2||GRADE 3||GRADE 5||GRADE 7||GRADE 9||GRADE 11||GRADE 12||GRADE 23|
|Residuals, max each||0.1||0.1||0.1||0.1||0.1||0.1||0.1||0.1||0.1|
|Residuals, max total||0.4||0.4||0.4||0.4||0.4||0.4||0.4||0.4||0.4|
Tensile Strength Of Titanium Welded Pipe
|Grade||Tensile Strength, min||Yiel Strength (0.2% Offset)||Elongation 2 in. or 50 mm|
|Ksi||(Mpa)||Ksi||(Mpa)||Ksi||(Mpa)||gage length min %|
Application Of ASTM B862 Grade 2 Titanium Welded Pipe
The Titanium Alloy Pipe is used in the following applications:-
- Chlorination systems
- Flue gas scrubbers
- Outlet ducting and stack liners for power plants, pulp and paper bleach plants, sulfur dioxide scrubbers, and weld overlay of less corrosion resistant metals
- Acid production and pickling systems
- Pharmaceutical industries use alloy fittings and tubing to avoid contamination caused by corrosion related failures
- Cellophane manufacturing
- Chlorination systems
- Pesticide production
- Incineration scrubber systems
- Chemical process industry in equipment like flue gas scrubbers, chlorination systems, sulfur dioxide scrubbers, pulp and paper bleach plants, pickling systems, and nuclear fuel reprocessing
- Waste water processing
- Pollution control stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans and fan housings
- Flue gas desulfurization systems
- Chemical processing components like heat exchangers, reaction vessels, evaporators, and transfer piping
- Sour gas wells
- Pulp and paper production
- Waste treatment
- Pharmaceutical and food processing equipment
The ASTM defines a number of alloy standards with a numbering scheme for easy reference.
- ASTM Grade 1-4 are unalloyed and considered commercially pure or “CP”. Generally the tensile and yield strength goes up with grade number for these “pure” grades. The difference in their physical properties is primarily due to the quantity of interstitial elements. They are used for corrosion resistance applications where cost and ease of fabrication and welding are important.
- ASTM Grade 5 is the most commonly used alloy. It has a chemical composition of 6% Aluminium, 4% Vanadium, remainder titanium, and is commonly known as Ti6Al4V, Ti-6AL-4V or simply Ti 6-4. Grade 5 is used extensively in Aerospace, Medical, Marine, and Chemical Processing.
- ASTM Grade 6 contains 5% Aluminium and 2.5% Tin. It is also know as Ti-5Al-2.5Sn. This alloy is used in airframes and jet engines due to its good weldability, stability and strength at elevated temperatures.
- ASTM Grade 7 contains 0.12 to 0.25% Palladium. This grade is similar to Grade 2. The small quantity of Palladium added gives it enhanced crevice corrosion resistance at low temperatures and high pH.
- ASTM Grade 7H contains 0.12 to 0.25% Palladium. This grade has enhanced corrosion resistance.
- ASTM Grade 9 contains 3.0% Aluminium and 2.5% Vanadium. This grade is a compromise between the ease of welding and manufacturing of the “pure” grades and the high strength of Grade 5. It is commonly used in aircraft tubing for hydraulics and in athletic equipment.
- ASTM Grade 11 contains 0.12 to 0.25% Palladium. This grade has enhanced corrosion resistance.
- ASTM Grade 12 contains 0.3% Molybdenum and 0.8% Nickel.
- ASTM Grades 13, 14, and 15 all contain 0.5% Nickel and 0.05% Ruthenium.
- ASTM Grade 16 contains 0.04 to 0.08% Palladium. This grade has enhanced corrosion resistance.
- ASTM Grade 16H contains 0.04 to 0.08% Palladium.
- ASTM Grade 17 contains 0.04 to 0.08% Palladium. This grade has enhanced corrosion resistance.
- ASTM Grade 18 contains 3% Aluminium, 2.5% Vanadium and 0.04 to 0.08% Palladium. This grade is identical to Grade 9 in terms of mechanical characteristics. The added Palladium gives it increased corrosion resistance.
- ASTM Grade 19 contains 3% Aluminium, 8% Vanadium, 6% Chromium, 4% Zirconium, and 4% Molybdenum.
- ASTM Grade 20 contains 3% Aluminium, 8% Vanadium, 6% Chromium, 4% Zirconium, 4% Molybdenum and 0.04% to 0.08% Palladium.
- ASTM Grade 21 contains 15% Molybdenum, 3% Aluminium, 2.7% Niobium, and 0.25% Silicon.
- ASTM Grade 23 contains 6% Aluminium, 4% Vanadium.
- ASTM Grade 24 contains 6% Aluminium, 4% Vanadium and 0.04% to 0.08% Palladium.
- ASTM Grade 25 contains 6% Aluminium, 4% Vanadium and 0.3% to 0.8% Nickel and 0.04% to 0.08% Palladium.
- ASTM Grades 26, 26H, and 27 all contain 0.08 to 0.14% Ruthenium.
- ASTM Grade 28 contains 3% Aluminium, 2.5% Vanadium and 0.08 to 0.14% Ruthenium.
- ASTM Grade 29 contains 6% Aluminium, 4% Vanadium and 0.08 to 0.14% Ruthenium.
- ASTM Grades 30 and 31 contain 0.3% Cobalt and 0.05% Palladium.
- ASTM Grade 32 contains 5% Aluminium, 1% Tin, 1% Zirconium, 1% Vanadium, and 0.8% Molybdenum.
- ASTM Grades 33 and 34 contain 0.4% Nickel, 0.015% Palladium, 0.025% Ruthenium, and 0.15% Chromium .
- ASTM Grade 35 contains 4.5% Aluminium, 2% Molybdenum, 1.6% Vanadium, 0.5% Iron, and 0.3% Silicon.
- ASTM Grade 36 contains 45% Niobium.
- ASTM Grade 37 contains 1.5% Aluminium.
- ASTM Grade 38 contains 4% Aluminium, 2.5% Vanadium, and 1.5% Iron. This grade was developed in the 1990s for use as an armor plating. The iron reduces the amount of Vanadium needed for corrosion resistance. Its mechanical properties are very similar to Grade 5.
Characteristics of titanium
- Outstanding corrosion resistance
- Superior strength-to-weight ratios
- Low density
- High heat-resistance
- Good thermal conductivity
- Very good oxidation capabilities
- High melting point
- Low elasticity module
- Excellent erosion resistance
- Low thermal expansion coefficient
Manufacturing Process Of ASTM B862 Grade 2 Titanium Welded Pipe