مخازن گاز طبیعی فشرده

Part 2The purpose of this article is to explain the role of the laboratory and standard tests in the quality control of seamless cylinders. First, in this part of the article, general and functional tests of seamless cylinders including Ambient temperature pressure cycling, Leak Test, Bonfire Test, Penetration Test, Hydrostatic Pressure Test and other functional tests were discussed and then non-destructive tests such as magnetic particle tests, crack detection and thickness measurement by ultrasonic Test method were investigated. In the following, the specialized tests of type II, III and IV automotive and industrial cylinders, including acid environment tests, Extreme temperature pressure cycling Test, High temperature creep Test, Composite flaw tolerance Test, Accelerated stress rupture Test and others Tests were stated and at the end, the tests of adhesion, flexibility, Coating Thickness measurement and other tests of the protective coating of the cylinders were investigated. Based on the presented materials, regard to the great number of selective Tests and approval procedure that should meet the standards in a Accredited laboratory, as well as continuously quality controls, the reliability and high level of safety of these cylinders are guaranteed.

The purpose of this article is to explain the role of the laboratory in the quality control of seamless cylinders. First, in this article, the types, property, applications of compressed natural gas cylinders are discussed. Then the methods and processes of the production of these cylinders are reviewed. Afterwards, national and international standards, product approvals and tests that performed on gas cylinders are considered. Mechanical properties and Material tests, Destructive and Non-destructive tests are reviewed. At the result, can ensure reliability and desired quality of the CNG cylinders for the defined usage