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According to the NTSB's preliminary report, customers in the accident area received gas from a low-pressure (0.5 psi) distribution network which, in turn, was fed from a high-pressure (75 psi) main pipeline via regulators controlled by sensors measuring pressure in the low-pressure pipes. At the time of the accident, workers were replacing some ...
The gas fire caused major damage to ten homes, and, minor damage to 42 homes. [213] November 19 – Telephone company contractors installing an underground cable hit a 10-inch gas pipeline in Vandyne, Wisconsin. Gas at 750 psi escaped, and ignited about 45 minutes later, killing one of the contractors, and injuring three others. [171]
January 2 – A crew installing a water main hit a 6-inch gas main at 450 psi of pressure in Novi, Michigan. Gas company workers were trying to install a sleeve over the failure when the gas exploded and burned, injuring 6 of the Gas Company crew. A telephone cable was also damaged, knocking out phone service for about 5-- customers. [32]
The following characteristics may reduce or eliminate water hammer: Reduce the pressure of the water supply to the building by fitting a regulator. Lower fluid velocities. To keep water hammer low, pipe-sizing charts for some applications recommend flow velocity at or below 1.5 m/s (4.9 ft/s). Fit slowly closing valves.
December 5 – A 16-inch gas pipeline at 500 psi of pressure exploded and burned near a natural gas plant in Goldsmith, Texas. A fireball 250 feet high was created after the explosion, destroying 12 to 15 utility poles, and caliche and rocks the size of bowling balls damaged a road. There were no injuries reported. [192]
A typical nominal regulated gauge pressure from a medical oxygen regulator is 3.4 bars (50 psi), for an absolute pressure of approximately 4.4 bar and a pressure ratio of about 4.4 without back pressure, so they will have choked flow in the metering orifices for a downstream (outlet) pressure of up to about 2.3 bar absolute.
The San Bruno pipeline explosion occurred at 6:11 pm PDT on September 9, 2010, in San Bruno, California, when a 30-inch (76 cm) diameter steel natural gas pipeline owned by Pacific Gas & Electric exploded into flames in the Crestmoor residential neighborhood 2 miles (3.2 km) west of San Francisco International Airport [4] near Skyline Boulevard and San Bruno Avenue. [5]
3,200 psi Critical pressure of water 28 MPa 4,100 psi Overpressure caused by the bomb explosion during the Oklahoma City bombing [72] 40 MPa 5,800 psi Water pressure at the depth of the wreck of the Titanic: 69 MPa 10,000 psi Water pressure withstood by the DSV Shinkai 6500 in visiting ocean depths of > 6500 meters [73] 70 to 280 MPa 10,000 to ...