Pipeline Accident Report: NTSB-PAR., Issue 81 |
Other editions - View all
Common terms and phrases
4-inch-diameter gas main American Petroleum Institute boilerroom carrier closed valve Colonial Pipeline Colonial Pipeline Company compression coupling Conowingo corrosion crude oil damage electrical equipment explosion-proof facility failure Federal regulations feet figure Four Corners control Four Corners dispatcher Four Corners gauger Fredericksburg Gale Avenue gas company gas meter set gasoline Gate Valve Greensboro Huntington Beach hydrostatically tested ignited inches installed isolating tank Items LACT units leak Line Company located Locust Grove MADISON PK Manassas manifold Marlex meter set assembly motor naphtha National Transportation Safety natural gas NUMBER operating Orange County overpressure personnel PIPELINE ACCIDENT REPORT pipeline system pressure relief valve pressure surge Priority Action psi 30 psi psig pump control room pump stations Rapidan River Rappahannock River recording chart Refinery Roseville service line shipper shipping pumps shut Simon Kenton station booster pump tank Transportation Safety Board Union Oil uprating vapors Virginia Watson shift foreman weld Williams Pipe Line
Popular passages
Page 30 - May 3, 1979 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. 9- Performing Organization Name and Address National Transportation Safety Board Bureau of Accident Investigation Washington, DC 20594 10.
Page 13 - July 31, 1977, unless it was designed and constructed as required by this part. § 195.402 Procedural manual for operations, maintenance, and emergencies. (a) General. Each operator shall prepare and follow for each pipeline system a manual of written procedures for conducting normal operations and maintenance activities and handling abnormal operations and emergencies. This manual shall be reviewed annually and appropriate changes made as necessary to insure that the manual is effective.
Page 34 - The National Transportation Safety Board determines that the probable cause of the accident was...
Page 32 - A valve seat made of resilient material designed to withstand abrasion of the gas, impurities in gas, cutting by the valve, and to resist permanent deformation when it is pressed against the valve port, (4) Pipe connections to tne regulator not exceeding 2 inches in diameter.
Page 32 - If the maximum actual operating pressure of the distribution system is 60 psig, or less, and a service regulator that does not have all of the characteristics listed in paragraph (a) of this section is used, or if the gas contains materials that seriously interfere with the operation of service regulators, there must be suitable protective devices to prevent unsafe overpressuring of the customer's appliances if the service regulator fails. (c) If the maximum actual operating pressure of the distribution...
Page 32 - Protection against accidental overpressuring. (a) General requirements. Except as provided in §192.197, each pipeline that is connected to a gas source so that the maximum allowable operating pressure could be exceeded as the result of pressure control failure or of some other type of failure, must have pressure relieving or pressure limiting devices that meet the requirements of §§192.199 and 192.201.
Page 32 - ... or less in case the upstream regulator fails to function properly. This device may be either a relief valve or an automatic shutoff that shuts, if the pressure on the inlet of the service regulator exceeds the set pressure (60 psig or less), and remains closed until manually reset.
Page 34 - s Catalog No. k. Title and Subtitle Special Study— Pipeline Excess Flow Valves 5. Report Date September 9. 1981 6. Perform! ng Organization Code 7. Author(s) 8. Performing Organization Report No. 9. Performing Organization Name and Address National Transportation Safety Board Bureau of Technology Washington, DC 20594 10.
Page 32 - Each pressure relief station or pressure limiting station or group of those stations installed to protect a pipeline must have enough capacity, and must be set to operate, to insure the following: (1) In a low pressure distribution system, the pressure may not cause the unsafe operation of any connected and properly adjusted gas utilization equipment.