ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)45105
CIS number 85-1819
ISSN - Serial title 0409-2961 - Bezopasnost' truda v promyšlennosti
Year 1984
Convention or series no.
Author(s) Fastov L.M., Ognev A.N.
Title Determining safe distances in the use of flame-control devices
Original title Opredelenie bezopasnyh rasstojanij pri primenenii plamezaščitnyh sredstv [in Russian]
Bibliographic information Feb. 1984, No.2, p.44-45. Illus.
Abstract Cutting an opening in a low-pressure gas pipeline with an oxy-acetylene torch can produce an open flame up to 2.5m long. If the escaping gas is directed into a funnel-shaped collector attached to a vertical stack, it can be flared outside the trench where cutting and welding operations normally take place, thus improving working conditions in the trench. To ensure that the flare itself does not endanger surrounding buildings, trees, equipment, etc., it must be kept at a safe distance from surrounding objects. Experiments with a full-scale model of a 300-dekaPascal pipeline and flare showed that the maximum flame length attained at any wind speed is 4.5m. At 6m from the flare, temperatures of only 50░C were measured at maximum flame length; thus 6m represents a safe distance, even for workers if no toxic combustion products are present.
Descriptors (primary) gas cutting; open flames; gas distribution; safe distances; piping
Descriptors (secondary) fire prevention
Document type D - Periodical articles
Subject(s) Fire and explosions
Broad subject area(s)
Browse category(ies) Safety devices
Welding and cutting
Power generation and distribution
Compressed gases and pressure vessels