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 100
- Downloads 0
V.G. Dan'ko
In the article the fault current limiter of inductive type with high-temperature superconducting coil and screen is considered. Main features of transient at occurrence of short circuit are analyzed.
PROFESSOR P.P. KOPNIAIEV – SCIENTIST, PUBLIC PERSON, ESTABLISHER OF HIGHER ELECTRICAL ENGINEERING EDUCATION (to the 150th anniversary of his birth)
Purpose. To carry out complete historical and scientific analysis of Professor P.P. Kopniaiev's activities and establish his role and place of achievements in the formation of the basic concepts and directions of the the...
CHARACTERISTICS OF A 4-PHASE VALVE RELUCTANCE MOTOR WHEN POWERED BY UNCAPACITOR SWITCHBOARD
Purpose. Nowadays more and more in a variety of machines and mechanisms applied switched reluctance motor. When designing these engines solve the problem selection switch. While the switch scheme comprises symmetrical br...
MASS AND COST FIGURES FOR SPATIAL AXIAL THREE-PHASE ELECTROMAGNETIC SYSTEMS WITH CIRCULAR AND HEXAGONAL FORMING CONTOURS OF TWISTED MAGNETIC CORE RODS
For a spatial three-phase axial electromagnetic system with double-contour phase elements of the twisted butt-end magnetic core, analytical dependences for optimal geometrical relations determination over minimum active...
SCREENING MAGNETIC FIELDS OF THE POWER FREQUENCY BY THE WALLS OF HOUSES
Purpose. To investigate the effectiveness of the screening of the magnetic field at 50 Hz by the walls of house. Methodology. To study the effectiveness of the screening we used the measurements of the magnetic field 1)...