RESEARCH INTO METHODS OF PIPE END DEMAGNETIZATION UNDER MAIN PIPELINE REPAIR
Journal Title: Електротехніка і Електромеханіка - Year 2014, Vol 0, Issue 3
Abstract
Efficiency of pipe end demagnetization methods is experimentally investigated to avoid arc magnetism at repair welding jobs on main pipelines. It is found that multi-polar biased static and dynamic demagnetization provides an acceptable level of magnetic flux density on pipe ends and stability of their magnetic state, which allows shortening repair time by means of executing demagnetization in parallel with other operation procedures.
Authors and Affiliations
P. N. Dobrodeyev
Keywords
Related Articles
- EP ID EP302272
- DOI 10.20998/2074-272X.2014.3.10
- Views 89
- Downloads 0
INVESTIGATION OF LOSSES IN INSULATION OF HIGH-VOLTAGE CABLES WITH XLPE INSULATION
In this paper the authors calculate the losses in insulation system cable with XLPE-polyethylene as a solid dielectric insulation and with semiconductor polyethylene used as a conductor screen and a insulation screen. Th...
MODELING OF DYNAMIC CHARACTERISTICS OF A NONLINEAR OSCILLATORY SYSTEM WITH A MAGNETIC SPRING. PART 1
A passive magnetic vibration isolator (a magnetic spring) with cylindrical magnets is considered. A mathematical model is developed to calculate magnetic spring magnetic field and force. Numerical calculation of the vibr...
ALLOWANCE FOR HEAT AND VIBRATION PARAMETERS VARIATION OF ELECTRIC MACHINES WITH EXTENDED FAILURE INTERVAL
Peculiarities of heat and vibration parameters determination are substantiated for electric machines with extended failure interval under conditions of defects in the main structural units and elements. The necessity of...
NEW APPROACHES AT CONSTRUCTION OF MAGNETIC CONDUCTORS FOR MAINS TRANSFORMERS
It is carried out exploration and the assaying of new approaches at construction of stacked laminated cores of mains transformers which consists in simultaneous application in a magnetic conductor of the anisotropic and...
THE STRUCTURAL AND PARAMETRICAL ORGANIZATION OF ELEMENTS OF A POWER SUPPLY SYSTEM IN THE CONDITIONS OF NETWORK CENTRISM
Purpose. Development of indicators of the structural and parametrical organization of effective active and adaptive system of service of power supply systems in the conditions of ideology of Smart Grid. Methodology. In t...