TSK deploys its wealth of experience and advanced technology to manufacture products that serve a diverse range of customer needs.
List of Products
| Product type | Main steel grades | Standards and accuracy |
|---|---|---|
| Stainless-steel tubes and superalloy tubes for piping and heat exchangers |
SUS303/304(L)/316(L)/317L/310S/321/347/631 NCF600,NCF800,TTP340WC,Ni200,Ni201,Monel |
JIS G 3459/G 3463, ASTM A213/A269, ASME SA213, etc. |
| Mirror-surface stainless-steel tubes | SUS304/316(L),NCF600 |
Customer-specific standards Inner surface roughness (Ry): 0.7–3 μm |
| Stainless-steel tubes and superalloy tubes for nuclear-power generation | SUS316(L),NCF600 | Customer-specific standards |
| Stainless-steel tubes for cylinders | SUS304/316 | Customer-specific standards |
| Stainless-steel tubes for pressure gauges | SUS304/316 |
Customer-specific standards Hardness (HV): 180, 200, 250, 270, 310, etc. |
| Stainless-steel tubes and superalloy tubes for industrial heater protection tubes | SUS304/316/310S/347,NCF600 | Customer-specific standards |
| Stainless-steel tubes for automotive parts | SUS304(L)/316(L)/310S,NCF600 | Customer-specific standards |
| Duplex stainless-steel tubes for high corrosion-resistant piping and seawater corrosion-resistant piping | SUS329J4L, etc. | JIS G 3459/G3463, etc. |
| Stainless-steel tubes and superalloy tubes for spacecraft and aircraft parts | SUS321/347,MA625L,MA718 | Customer-specific standards |
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AP tubes
Pickled-surface productsAnnealed＆Pickled
Features
The surface features a platinum-colored pickled finish.
When heat-treated in an atmospheric furnace, the surface of the tube acquires an oxide film called “scale.” The scale can be removed by washing it in acid solution. This acid-washing process has the effect of generating on the surface a passivation film (a thin, clear film formed by combination of oxygen from the air with the chrome in the stainless steel), which enhances the tube’s corrosion resistance. Tubes manufactured by this process of heat-treatment in an atmospheric furnace followed by acid washing are called annealed & pickled (AP) tubes.
ApplicationsChemical industry, petroleum industry, offshore plants, electrical appliances,industrial heaters,bourdon tubes for pressure gauges,automotive parts,spacecraft and aircraft parts, etc.
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BA tubes
Mirror-surface productsBright Annealed
Features
Smooth, light-reflecting surface
Tubes produced by heat-treatment in a non-oxidizing atmosphere are called bright-annealed (BA) tubes. This type of heat treatment does not generate scale, so no acid-washing is performed. As a result, the surface is smooth with a metallic gloss and affords excellent dimensional accuracy. Passivation treatment generates a delicate passivation film, providing excellent corrosion resistance. These tubes are used in applications where contamination and gas buildup inside the tubes must be avoided.
ApplicationsTubes inside semiconductor fabrication equipment, food-related applications, medical equipment, automotive parts,spacecraft and aircraft parts,nuclear-power generation, etc.
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EP tubes
Internal-electropolished productsElectropolished
Features
Ultra-smooth mirror surface
A BA tube can be filled with an electrolytic solution and impressed with direct current. The resulting electrolytic reaction at the anode makes the internal surfaces of the BA tube even smoother and cleaner. The resulting tube is called an electropolished (EP) tube. Iron is easy to electrolyze using electrolytic polishing, so this process precipitates out, or elutes, the iron, leaving a higher concentration of chrome. The result is a passivated film that is firm and stable due to the high chrome concentration. Enriching the surface with chrome further improves corrosion resistance.
ApplicationsHigh-purity-gas tubes, biotech-related equipment, fine-chemical-related equipment, etc.
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CR tubes
Cold-reduced ProductsCold Reducer
Features
Thin-walled, mirror-surfaced tubes with smooth, light-reflecting surfaces
AP and BA tubes are formed by cold drawing. Tubes manufactured by cold rolling are called cold-reduced (CR) tubes.
Rolling offers many advantages. It provides significantly better dimensional accuracy than drawing, for example, and yield loss is low. This technique is used to make thin-walled products as well as special tubes such as titanium tubes. The disadvantage is that this process is exceedingly slow, so production efficiency is quite poor.
ApplicationsCylinders, machine-internal parts, spacecraft and aircraft parts, etc.
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Deformed tubes
Deformed tubes
Features
Shapes tailored to customer requirements
TSK produces a wide range of deformed tubes, including polygonal tubes, clad tubes (double tubes), and composite tubes. Clad tubes are generally known as cost-effective tubes. But we manufacture clad tubes as high-performance tubes that satisfy requirements for both inner surface roughness and pressure resistance. Composite tubes are manufactured by combining multiple tubes into one tube with a partition-divided interior. This unique structure allows a single tube to concurrently carry differing kinds of gasses, wires, etc. We offer varied options for deformed tubes in terms of size, shape, and combinations of steel grade. Feel free to contact us with any inquiry.
