The new value design uses high-nitrile Buna composites as sealing material to counteract the problem of explosive decompression
. High-nitrile Buna has a much higher density than normal Buna and is resistant to internal pressurization even when subjected to 600 psi and higher.
Figure 5 shows that vulcanizates based on HNBR elastomer are highly resistant to explosive decompression. Dry carbon dioxide at 5.2 MPa (750 psi) was used in the test to evaluate explosive decompression resistance.
Figure 6 shows the effect of explosive decompression testing on tensile strength.
Timar, "Optimization of HNBR for explosive decompression
service," Rubbercon 92, Brighton, England.
(39) Application of finite element method to predict explosive decompression
damage in elastomeric components.
The increase in both operating temperature and pressure of the R134A has created problems with the elastomers in both thermal stability and explosive decompression in elastomeric seal boots, orings and hose liners.
Subsequent explosive decompression testing demonstrated the N220-elastomer combination to have the best XDF performance.
In high pressure gas applications, a common problem is explosive decompression
. This problem is indicated by the random short splits or ruptures going deep into the o-ring cross section.
With regard to rubber products, there has been a significant amount of work done in the last few years with respect to explosive decompression
in products used in the oil field and with improving the life of tank treads.
One of the modes by which these seals fail is by gas decompression blistering, commonly known as explosive decompression
, which causes the elastomeric component to become the limiting factor in the performance of oilfield equipment.