HYDROSTATIC BURST TESTING SYSTEM

NGV-CYL-JA22

ISO 11439 statement

The rate of pressurization shall not exceed 14 bar/s at pressures in excess of 80 % of the design burst pressure. If the rate of pressurization at pressures in excess of 80 % of the design burst pressure exceeds 3,5 bar/s, then either the cylinder shall be placed schematically between the pressure source and the pressure measurement device, or there shall be a 5 s hold at the minimum design burst pressure.

The minimum required (calculated) burst pressure shall be at least 450 bar, and in no case less than the value necessary to meet the stress ratio requirements. Actual burst pressure shall be recorded. Rupture may occur in either the cylindrical region or the dome region of the cylinder.

DESCRIPTION  OF MACHINE

The  machine  includes  two  parts:  insulated chamber   and  control  unit.       The  internal surfaces of the chamber are made of FRP.  

The tested cylinder inside can be pressurized and pressure cycled hydrostatically pressurized to 300 bar or more.

Test using water instead of gas (easier to pressure cycle). Failure mode must be leak, not rupture.

SPECIFICATION

1.       The machine can be used to test the CNG cylinders according to ISO11439  Annex A (normative) Test methods  and   criteria  A.12 Hydrostatic pressure burst test.

2.       Control station                              : 1 m x 0,98 m x 1,5 m

3.       Hydraulic Pump with:

·         1034 bar max pressure

·         0 – 4,5 GPM Capacity

·         440 CSS plunger

·         SS 303 body material

·         UMHWPE Seal

·         Water as working liquid

4.       The machine can be used to test the CNG cylinder of size: diameter 406 mm and length 1.8 m maximum.

5.       The tested cylinder inside the chamber can be hydrostatically pressurized to 300 bar or more.

6.       Close chamber with sight window

7.       The machine includes two          parts: insulated enclosed chamber (tank) and control unit.

8.       The internal dimension of the enclosed chamber (tank) is 2 x 0.6 x 0.9 m.

9.        The machine is automatically controlled by software.  

10.    The machine can measure the pressure during test.

11.     The machine is controlled by the control software running on Windows OS. The test result is reported   as   number   or   graph   and printed out on the printer.

12.    The machine is operated by 220-230 VAC 1 phase 50 Hz and 380 VAC 3 phase 50Hz.

Please consult with our local agent to determine your requirement.