The Experience of Gas Pipeline Stress-Strain State Control With Usage of the Metal Magnetic Memory Method as Compared With Conventional Methods and Stress Control Means

Autor: Doubov, A.A., Demin, E.A., Milyaev, A.I., Steklov, O.I.
Zdroj: Welding in the World; September 2002, Vol. 46 p29-33, 5p
Abstrakt: Test methods and means for characterising the stress-strain-state (SSS) of pipes in a gas pipeline compressor station were compared. At first the SSS determination methods and means were evaluated under laboratory conditions, and then under field conditions. The test objects were a special hydraulic test bench; supercharger manifold piping systems; a compressor station input loop; a duster manifold piping. For calibration artificial strains were impressed to the last two objects. The following SSS determination methods and means were applied: strain measurement; magnetic Barkhausen noise; metal magnetic memory (MMM) method; amplitude-phase frequency characteristics (APFC) method; hardness measurements; calculations; design-experiment method.
Databáze: Supplemental Index
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