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Tantalum sleeve
Size available: Tantalum seamless sleeve, any outside diameter, wall thickness and random length with one end close.

Typical Size :
8  mm OD x 0.5mm Wall Thickness x 350mm Length with one end close;
9  mm OD x 0.3mm Wall Thickness x 250mm Length with one end close;
15mm OD x 0.5mm Wall Thickness x 200mm Length with one end close;
15.9mm OD x 0.5mm Wall Thickness x 145mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 145mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 190mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 200mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 240mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 350mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 400mm Length with one end close;
16mm OD x 0.4mm Wall Thickness x 450mm Length with one end close;
17mm OD x 1.0mm Wall Thickness x 400mm Length with one end close;
18mm OD x 2.5mm Wall Thickness x 105mm Length with one end close;
19mm OD x 1.0mm Wall Thickness x 100mm Length with one end close;
20mm OD x 0.5mm Wall Thickness x 2380mm Length with one end close;
20mm OD x 0.5mm Wall Thickness x 2880mm Length with one end close;

Application:  Tantalum thermowells are often used to protect thermocouples when monitoring the temperature of highly corrosive chemical solutions and agents. Solid machined and drilled tantalum thermowells are good for these applications. But to save money, a thin (0.013 - 0.015 inch thick) tantalum sleeve is often used. This is fitted over a thermowell made of type 316 stainless steel.

Tantalum sleeve fitted over a stainless steel thermowell provides an economical way to protect against corrosion.

e.g. tantalum electrode is consisted of seamless tantalum tube and the copper rod (straight rod), the copper rod is usually placed inside tantalum tube, tantalum tube is used as tantalum sleeve or tantalum protecting sleeve against vitriol, sulfide solution, natrium solution and manganic solution, hydrochloric acid solution and phosphate solution, acetic acid, formic acid, formate and hot alkali solution.

Trade names:  tantalum ampoule, tantalum ampule, tantalum sheath, tantalum sleeve, tantalum shell, tantalum protect tubing, ta tube, ta tubing, etc.,

Standard Specification ASTM B 708 -05 for Tantalum Ribbon, Tantalum Alloy Ribbon, Tantalum Strip, Tantalum Alloy Strip, Tantalum Foil, Tantalum Alloy Foil, Tantalum Sheet, Tantalum Alloy Sheet, Tantalum Plate, Tantalum Alloy Plate.

This specification covers unalloyed and alloyed Tantalum Ribbon, Tantalum Alloy Ribbon, Tantalum Strip, Tantalum Alloy Strip, Tantalum Foil, Tantalum Alloy Foil, Tantalum Sheet, Tantalum Alloy Sheet, Tantalum Plate, Tantalum Alloy Plate as follows:
1. ASTM B 708 -05 UNS R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both.
2. ASTM B 708 -05 UNS R05400, unalloyed tantalum, powder-metallurgy consolidation.
3. ASTM B 708 -05 UNS R05255, tantalum alloy, 90% tantalum 10% tungsten, electron-beam furnace or vacuum-arc melt, or both.
4. ASTM B 708 -05 UNS R05252, tantalum alloy, 97.5% tantalum 2.5% tungsten, electron-beam furnace or vacuum-arc melt, or both.
5. ASTM B 708 -05 UNS R05240, tantalum alloy, 60% tantalum 40% columbium, electron-beam furnace or vacuum-arc melt.

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Standard Specification ASTM B 521 -98 for Tantalum Tube + Tantalum Alloy Tube Seamless and Welded.This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades: 

1. ASTM B 521 -98 UNS R05200, unalloyed tantalum, vacuum melt; 
2. ASTM B 521 -98 UNS R05200, unalloyed tantalum, powder-metallugry consolidation; 
3. ASTM B 521 -98 UNS R05255, tantalum alloy, 90% tantalum 10% tungsten alloy, vacuum melted; 
4. ASTM B 521 -98 UNS R05252, tantalum alloy, 97.5% tantalum 2.5% tungsten alloy, vacuum melted; 
5. ASTM B 521 -98 UNS R05240, tantalum alloy, 60% tantalum 40% columbium, electron-beam furnace or vacuum-arc melt, or both.