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Yamamoto Special Steel Co.,LTD

Head Office & Warehouse
ZIP Code: 552-0006
1-4-27 Ishida, Minato-ku, Osaka
TEL: +81 (0)6-6572-8108
FAX:+81 (0)6-6572-8109

Tokyo office
ZIP Code: 105-0004
VORT Shimbashi II 8F,
6-13-12 Shimbashi,
Minato-ku, Tokyo
TEL: +81 (0)3-5843-8760
FAX: +81 (0)3-5843-8776

Seamless pipes BA.EP

High smoothness and cleanliness are required in the pipe inner due to the importance of particle and liquid avoidance in the production of semiconductors and LCDs. This type of cleanliness is getting more and more important in the pipes of the high purity gas supplier regarding the current improvement of semiconductor technology.

We have plenty of industrial items to meet your various needs.

It is expected to achieve these result below by careful finishing in the pipe inner.
Less liquid and gas remains because of its high smoothness.
Thanks to a little attached substance, it is possible to achieve high purity and high quality.
It gains corrosion resistance because the passive film is dense so liquid pollution rarely occur.


Main purposes
High purity gas pipes for a semiconductor and an LCD production, pipes for fuel cell, a vacuum system, biodevice,
machines for food, and medical machines.

Seamless pipes BA.EP stock list

Diameter
(Inch)
SIZE
Outer diameter(mm) * thickness(mm)

Length
BA EP
304BA 316BA 316LBA 316LEP
1/16 1.58×0.4 2M - - -
2.0×0.5 " - - -
3.0×0.5 " - -
3.0×1.0 " - -
1/8 3.18×0.5 " - -
3.18×0.72 "
3.18×1.0 " - -
4.0×0.5 " -
4.0×1.0 " - -
3/16 4.76×0.8 " - - -
5.0×0.5 " - - -
5.0×1.0 " - - -
6.0×0.5 " - - -
6.0×1.0 " -- --
6.0×1.0 4M
6.0×1.2 " - - -
6.0×1.5 " - - -
1/4 6.35×0.89 2M -
6.35×0.89 4M - - -
6.35×1.0 2M
6.35×1.0 4M
6.35×1.24 " - -
6.35×1.65 " - - -
8.0×0.8 2M - - -
8.0×1.0 " -
8.0×1.0 4M
8.0×1.2 " - - -
8.0×1.5 " - - -
3/8 9.53×0.89 2M - - -
9.53×0.89 4M - - -
9.53×1.0 2M
9.53×1.0 4M
9.53×1.24 " - -
9.53×1.65 " - - -
10.0×1.0 2M - -
10.0×1.0 4M
10.0×1.5 " - - -
12.0×1.0 2M - -
12.0×1.0 4M
12.0×1.5 " - - -
1/2 12.7×1.0 2M - - -
12.7×1.0 4M
12.7×1.24 2M
12.7×1.24 4M
12.7×1.65 " - -
13.8×1.2 " - - -
13.8×1.65 " - - -
14×1.0 " - - -
5/8 15.88×1.0 " -
15.88×1.65 " - - -
17.3×1.2 " - -
3/4 19.05×1.24 "
19.05×1.65 "
21.7×1.65 " -
1 25.4×1.65 " -
27.2×1.65 " -
34.0×1.65 " -
42.7×1.65 " -
48.6×1.65 " -
60.5×1.65 " -
76.3×2.1 " -
89.1×2.1 " -

*The biggest number of selection in the industry.
 Estimation, order can be made regardless the amount.
*We make an estimation even in the other size,
 small lot, quick demand, and processed items as your order.

Bright Annealing pipe

What is the Bright Annealing pipe?
Seamless stainless steel pipes is improved and an inside smoothness degree is improved by giving solution treatment method with cold-drawing and bright heat treatment method. It is a precise tube manufactured to supply the liquid and the gas to lubrication.
Specification
It is manufactured in accordance with JIS G3459.
However, the tolerance of size is manufactured from an allowance that is severer than each manufacturer JIS standard.
There are a few differences by each manufacturer though inside roughness is manufactured from Ry≦3.0μm. (Please give the contact in detail of a tolerance of size and inside roughness. )
Packaging Methods
The pipe is given the both ends vinyl cap for prevent dust invasion from the outside.
It is wrapped with the polyethylene bag one by one.

Electropolishing pipe

What is the Electro Polishing pipe?
The electrolytic polishing pipe is the high purity exact pipe that improves corrosion resistance.
One of the reason is the surface of the pipe is made a smooth specula because of the electrification grinding process. Another one is reproducing steady passive film by the chemical reaction during the process.
Specification
It is manufactured in accordance with JIS G3459.
However, the tolerance of size is manufactured from an allowance that is severer than each manufacturer JIS standard.
There are a few differences by each manufacturer though inside roughness is manufactured from Ry≦0.5μm. (Please give the contact in detail of a tolerance of size and inside roughness. )
Packaging Methods
The ultrapure water washing is given in a clean room. Afterwards, both ends are shut with the vinyl cap. It is wrapped twice with the bag of polyethylene.