- Author
-
Parker, A. J.
|
Wenzel, A. B.
|
Al-Hassan, T.
- Title
- Extension of the Interim Jet Fire Test Procedure for the Evaluation of Passive Fire Protection Materials on Offshore Pipelines.
- Coporate
- Southwest Research Institute, San Antonio, TX
Health and Safety Executive, Bootle, England
- Book or Conf
- American Institute of Chemical Engineers. Loss Prevention Symposium, 29th Annual. Proceedings. LPS 1995. July 31-August 2, 1995,
Boston, MA,
1-18 p.,
1995
- Keywords
-
pipelines
|
fire tests
|
evaluation
|
fire protection
|
offshore platforms
|
heat flux
|
surface temperature
|
pipes
|
thermocouples
|
nozzles
|
radiometers
- Identifiers
- Interim Jet Fire Test Procedure (IJFTP); passive fire protection (pfp) materials; 457-mm diameter instrumented pipe exposed to a free jet; direct impingement on the 457-mm diameter instrumented pipe; peak free jet heat flux levels; peak free jet surface temperatures; peak heat flux levels for 457-mm diameter pipe; peak heat flux levels for 305-mm diameter pipe
- Abstract
- This paper discusses the results of an experimental research program conducted at Southwest Research Institute (SwRI) to extend the Interim Jet Fire Test Procedure for the evaluation of passive fire protection (pfp) materials used on risers and process piping on offshore platforms and onshore plants. The research program consisted of quantifying the fire environment around various sized tubular sections when tested in accordance with a modified Interim Jet Fire Test Procedure. Two uninsulated, 3-m long tubular sections, one 457 mm in diameter and one 305 mm in diameter, were instrumented with 4 ellipsoidal radiometers, 8 total heat flux gauges, and 12 Inconel sheathed thermocouples and exposed to the jet fire environment. The tubular sections were oriented horizontally in front of a 1500-mm square steel box and exposed to a direct flame impingement of a single phase propane vapor jet exiting from a converging nozzle located 1.00 m from the front face of the pipe, as shown in figure 1. The results of the test program are: 1) The proper test parameters were determined in order for the radiative component to compose at least 50% of the total heat flux and achieve environment temperatures of approximately 1100ºC; 2) The 457-mm diameter pipe is too large for the current test procedure to yield equivalent results to large-scale test data; and 3) The 305-mm diameter pipe placed in front of the steel box, flush with the front face, produces maximum total heat fluxes of 285 kW/m², which is considered to be an adequate reproduction of the large-scale jet fire environment. The test procedure will most likely require a tubular section approximately 203 mm in diameter be coated and tested flush with the front of the steel box in order to achieve the target heat flux levels of 300 kW/m² experienced in large-scale tests. The results and analysis of this test program show that the environmental conditions recommended in the Interim Jet Fire Test Procedure for the evaluation of pfp materials on tubular sections utilizing pipe diameters of less than 305 mm can be reproduced.