Reasons for being Chosen

Our world’s top-class, high-precision mirror finishing technology with Rmax from 1 to 3s provides state-of-the-art high-purity gas cylinders that significantly contribute to the manufacture of various high-precision electronic devices.

Maintaining the high purity of the gas used for semiconductor manufacturing in the cylinder requires not only high-precision welding but also sophisticated inner surface polishing to prevent contamination (impurities) from entering the cylinder. SK Cylinder achieves the world’s top-class, high-precision inner surface mirror finishing with Rmax from 1 to 3s in the manufacturing of stainless steel welded cylinders. We also use our advanced welding technology to provide cutting-edge, high-purity gas cylinders that are indispensable for the manufacture of semiconductors, liquid crystals, and other electronic devices.

High-precision welding technology that achieves high airtightness and high-pressure resistance, and our proprietary solution heat treatment technology

The manufacturing process for stainless steel welded cylinders uses TIG welding, which is less likely to cause weld defects such as pits and blowholes and also allows for excellent control. By adjusting the angle of the welding torch, welding speed, and the amount of shielding gas used to the best of their ability, the best finish for high-purity gas cylinders, a high airtightness, and a high-pressure resistance are achieved. Furthermore, our unique solution heat treatment technology removes embrittlement and residual stress while enhancing the corrosion resistance of stainless steel.

Advanced processing technologies

  • Welding technology (for stainless steel, steel, aluminum cylinders, etc.)
  • Solution heat treatment technology (for stainless steel cylinders), etc.

The world’s top-class, high-precision inner surface polishing technology with Rmax from 1 to 3s

The manufacturing of stainless steel welded cylinders make full use of our unique manufacturing know-how to achieve the world’s top-class ultra-high-precision inner surface polishing with Rmax from 1 to 3s. Such cylinders have achieved excellent results in various gas tests conducted based on the specifications of chemical manufacturers, and have been highly evaluated worldwide as high-pressure gas cylinders for semiconductor manufacturing with an excellent clean performance.

Mirror finishing

  • Stainless steel welded cylinders, etc.

Gas cylinder design and manufacturing technologies that can be applied to various materials, structures, and sizes

For LP gas, we can manufacture products with a wide range of capacities, from small 2 kg cylinders to large bulk storage tanks with a maximum capacity of 2.9 tons. For order-made products, we can manufacture large high-pressure gas cylinders from about 1 liter to over 1,000 liters. We can also handle materials such as steel, stainless steel, aluminum, and other special materials such as FRP and titanium. We offer a high degree of flexibility in design and manufacturing technology, such as the ability to select the optimal structure of either welded or seamless cylinders according to the performance, quantity, and cost required.

Applicable sizes and materials

  • LP gas cylinders
    (2 kg type to 50 kg type)
  • LP gas bulk storage tank
    (150 kg type to 2.9 ton type)
  • (1 L to 20 L)
  • Stainless steel welded cylinders
    (1 L to 40 L)
  • Various special order-made cylinders
    (1 L to 1,000 L)
  • Steel
  • Stainless steel
  • Aluminum
  • FRP, etc.