Typical design features

Design concept

The concept used for cylinders designing comprises a set of engineering design principles, in particular:

  • acceptably low probability of structural breakup without previous leakage
  • predictable resistance of liner structure material to cracking
  • feedback providing for termination of the product use in case of through thickness crack leakage

 Basic design arrangement

The cylinder basic design arrangement comprises a welded thin liner made of yielding stainless steel and composite overwrapping which covers the whole surface of the liner. Use of corrosion-resistant stainless steel types 304, 304L 316, 316L and so on permits the use of cylinders to store and transport all types of gases and media as per ADR/RID classification.

Standart types of product testing:

Standard tests include:

  • Limit-load test to evaluate true margins of safety
  • Cyclic loading test (at test pressure Ph) to evaluate the period of safe operation.
  • Cyclic temperatures test (-60 to +70°C) to evaluate safe operating temperature range.
  • Long term sustained load tests (at internal test pressure Ph) at maximum temperature (+80°C).
  • Drop test in working conditions from different heights in several versions.
  • Test of composite overwrap surface local damage impact on safe operation of the device.
  • High-speed impact test with a given energy (gunfire test).
  • Test of the cylinder behaviour under fire loading.
  • Cyclic pneumatic pressure loading test to evaluate the maximum (minimum) filling levels.
  • Permeation test to determine leak tolerance of the gases stored.
  • Test of environment impact on safety operation in a specified time interval.


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