Compared with the steel cylinders for liquefied petroleum gas(LPG), fully-wrapped glass fiber reinforced cylinders with high-density polyethylene liners (type-IV cylinders) have been widely used due to their advantages of light weight, corrosion resistance, low maintenance cost and no explosion when exposed in fire. However, for the heterogeneity of raw material performances and instability of manufacturing process, the mechanical performances of type-IV cylinders show a certain dispersion. Therefore, in this study, a series of burst tests and pressure cycle tests on Type-IV LPG cylinders (26.2 L, 2.1 MPa) was conducted to examine the performances of burst pressure and number of cycles, and analyze the distribution characteristics. The total length of experimental cylinders is 465 mm, the outer diameter is 308 mm and the thickness of the liner and overwrap is 2 mm and 4 mm, respectively. The burst test and pressure cycle test are conducted according to the standard GB/T 15385 and GB/T 9252, respectively. Results showed that the 20 cylinders had the similar crevasses morphology along the axial wall of liners after burst tests, and the burst pressure of these cylinders fluctuated within the range of 13.7 MPa to 16.0 MPa. The statistical results of burst pressure showed approximately normal distribution with a standard deviation of 0.529 MPa. Also, the number of pressure cycles was above 12,000 with a cycle frequency no more than 15 cycles per minute. Above studies have provided a data support for the recently published association standard T/CATSI 02 003-2019.


Experimental Investigation on Burst Pressure and Fatigue Life of Type-4 Lpg Cylinders

Division / Sponsors: 
Pressure Vessels & Piping (PVP)


Paper Proceedings: https://asmedigitalcollection.asme.org/PVP/PVP2020/volume/83815

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