1. Application standard: ISO 11439:2013+A1:2021
2. Filling contents: CNG;
3. Environmental temperature: -40ºC~65ºC
4. Material:34CrMo4
5. After heat treatment,every cylinder should be ultrasonic testing according to the IS011439 oppendix B;
6. Working pressure: 200bar
7. Test pressure: 300bar ,time of keeping pressure should be more than 30S;
8. Hardness value 225HB~330HB,measure three points form the shell;
9. Min.Bursting pressure:≥450bar;
10. The sizes and notes with the mark in the drawing are not for dimention checking purpose.
11. Design service life:20 years.
12. After heat treatment,every cylinder should be Carried out ultrasonnically examination for defects in accordance with ISO 11439 annex B,and acceptance the depth of the notches shall not exceed of (5±0.75)% the nominal wall thickness.
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