SEDL / STP / STP1479-EB / STP37644S

Combustion Tests Under High Pressure Oxygen: Promoted Ignition Combustion Test Versus Metallic Disk Ignition Test

Binder, C
Specialists of Working Group “Safe Handling of Oxygen,” Division II.1 “Gases, Gas Plants,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Kasch, T
Specialists of Working Group “Safe Handling of Oxygen,” Division II.1 “Gases, Gas Plants,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Lehné, S
Specialists of Working Group “Safe Handling of Oxygen,” Division II.1 “Gases, Gas Plants,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Beck, U
Specialists of Division V1II.2 “Surface Technology,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Weise, M
Specialists of Division V1II.2 “Surface Technology,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Sahre, M
Specialists of Division V1II.2 “Surface Technology,”, Federal Institute for Materials Research and Testing (BAM), Berlin,

Pages: 5    Published: Jan 2006

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Source: STP1479-EB

Abstract

Two different test apparatuses are used at BAM to evaluate the safety of oxygen components: First, the “promoted ignition combustion test” according to ASTM G 124 [1] and to EIGA IGC Doc 13/02/E [2], and second, the new “metallic disk ignition test” that has not been standardized yet. The standard test method ASTM G 124 allows a ranking of metallic materials for use at high pressure oxygen. However, the transfer of those test results to valves and fittings in real-life situations is rather complex. The “metallic disk ignition test,” developed at BAM, is more practice oriented and uses metallic disks of different thicknesses of the investigated material. A commonly used nonmetallic sealing ring is placed in front of this disk and serves as an igniter. This test array is then exposed to high pressure gaseous oxygen impacts in a standardized pneumatic impact tester according to DIN EN 1797 [3].

Keywords:
adiabatic compression, pneumatic impact, flammability, high pressure oxygen, metallic materials, promoted ignition, coatings

Paper ID: STP37644S
Committee/Subcommittee: G04.01
DOI: 10.1520/STP37644S
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