*Pressures and dimensions other than those listed above will be designed when contacting us.

Pressurized storage batteries for hydrogen stations (gas storage units)

A hydrogen station is a facility that supplies hydrogen to fuel cell vehicles (FCVs).

We manufacture and sell accumulators (gas accumulators) for hydrogen stations which are made of materials that are safe in the high pressure hydrogen environment.

Effect of material strength in hydrogen environment

• The figure on the right shows the change in notch strength when using notched Cr-Mo (SCM435) steel samples and other materials with different material strengths at different tempering temperatures.
• The notch tensile test is a test in which a notch is made in the center of the test piece to induce a stress concentration that can significantly reveal the embrittlement property of the material.
• As the tensile strength increases above 1000 N/mm2, the susceptibility to hydrogen embrittlement increases significantly.

Durability of materials used in storage devices for hydrogen stations

• As shown in the table below, there is concern about the effects of hydrogen embrittlement when SCM435 steel is used for the battery material at the specified strength.
• It is recommended to use SCM435 steel with a controlled upper limit of 950 N/mm2 for tensile strength based on literature such as Hinotani et al.* to reduce susceptibility to embrittlement of the hydrogen atmosphere in the medium. high pressure hydrogen field.

Strength range of materials used in accumulators for hydrogen stations

Sumifine barrel polishing

Type 40l, 46.7l, 68l, 87l

*…mainly used for N2 . fire extinguishing system

*mark: Mainly for CO2 . fire suppression system

For pressures and sizes other than those listed above, we will design after consultation.

Stainless steel pipe flanges have welded joints, removable joints, sealed joints with sizes from 10A to 600A, types 5K and 10K.

In addition to JPF standard type, we also manufacture JPI, MSS and ASME standard stub heads.

One of the most common manufacturing methods for caps, where plate is cut out in a circle and formed by deep drawing.

Deep Drawing method

One of the most common manufacturing methods for caps, where plate is cut out in a circle and formed by deep drawing.

We also manufacture reducers with tangent upon request. For information, contact us directly.

We also manufacture reducers with tangent upon request. For information, contact us directly.

Note
(1) Reducer shapes of size 16″ and larger can be manufactured into a conical type without tangents.
(2) Can produce 48″ and larger. Please contact us for a reasonable size.

We also manufacture reducers with tangent upon request. For information, contact us directly.

Specifications

In addition to standard T-tubes (pipe diameters will vary depending on the size of the base and branch pipes). We also manufacture cross and Y-tubes on request.

In addition to standard T-tubes (pipe diameters will vary depending on the size of the base and branch pipes). We also manufacture cross and Y-tubes on request.

In addition to standard T-tubes (pipe diameters will vary depending on the size of the base and branch pipes). We also manufacture cross and Y-tubes on request.

In addition to standard T-tubes (pipe diameters will vary depending on the size of the base and branch pipes). We also manufacture cross and Y-tubes on request.

Our products are made of carbon steel, alloy steel, stainless steel, and non-ferrous alloys to meet a variety of needs.We have an extensive elbow lineup including 45-, 90- and 180-degree elbows as well as trimmed elbows and elbows with tangent.

Our products are made of carbon steel, alloy steel, stainless steel, and non-ferrous alloys to meet a variety of needs.We have an extensive elbow lineup including 45-, 90- and 180-degree elbows as well as trimmed elbows and elbows with tangent.

Specifications

Features

Our products are made of carbon steel, alloy steel, stainless steel, and non-ferrous alloys to meet a variety of needs. We have an extensive elbow lineup including 45-, 90- and 180-degree elbows as well as trimmed elbows and elbows with a tangent.