NATURAL GAS TEST (IMAGE) Southwest Research Institute Caption In this image, natural gas is discharged through a two-inch diameter pipe and ignited as part of an SwRI-conducted test to evaluate pressure relief valves. Temperatures and heat fluxes were measured at different standoff distances to provide computer model validation data that can aid future researchers as they investigate a variety of accident scenarios. Credit Southwest Research Institute Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.