ANALYSIS AND SYNTHESIS OF LITERATURE ON THE ASPECTS OF STRIP ELECTRODE FUSION DURING OVERLAY WELDING OF THE SEALING SURFACES OF PIPELINE ACCESSORIES
Journal Title: Periódico Tchê Química - Year 2018, Vol 15, Issue 0
Abstract
The paper considers questions about the features of strip electrode overlay welding of the sealing surfaces of industrial pipeline fittings for nuclear power plants (NPPs). The analysis of literature data, scientific publications and research results on problems associated with automatic overlay welding with strip electrodes are performed, and the most perspective type of a surfacing strip for overlay welding of the sealing surfaces of pipeline fittings is selected. The main component of any type of fittings is the sealing surface which can be obtained by electric arc overlay welding. Sealing overlay welding is used when the fitting material prevents obtaining a satisfactory quality of the sealing seat surface. The surfaces considered are subject to wear as a result of mutual friction, dynamic and chemical impact of the medium. Operational reliability and durability of pipeline fittings for NPPs depend on the valve gate tightness determined not only by the properties of the alloy but also by the quality of the sealing surface. Overlay welding can be one of the main causes of defects; therefore, a qualitative and rational approach to the technological process of overlay welding, the availability of surfacing materials, and the technical condition of equipment and accessories are needed.
Authors and Affiliations
Keywords
Related Articles
- EP ID EP502964
- DOI -
- Views 180
- Downloads 0
EVALUATION OF THE INFLUENCE OF THE TIDES ON THE PHYSICAL-CHEMICAL PARAMETERS PRESENT IN THE WATERS OF THE GUARAGUAÇÚ RIVER - PR
The Guaraguaçú River is an important Paranaense coastal ecosystem. As this water body approaches the mouth of the river, fresh water is gradually mixed with the salt water of the ocean by the action of the tidal cycle, t...
PRESERVATIVES FOR RAPID GROWTH TIMBER - A REVIEW
The shortage of species that are resistant to biological deterioration has forced man to use less durable, mainly fast-growing, reforestations, such as some species of Eucalyptus and Pinus. These species have moderate or...
HYDROCHEMICAL CHARACTERIZATION OF URBAN SPRING WATERS FROM TIJUCO STREAM, SUB-BASIN OF RIBEIRÃO DO ONÇA, CENTRAL-NORTH REGION OF BELO HORIZONTE
This work focuses on drawing up the hydrochemical profile of water samples collected in five springs of the Tijuco stream. The evaluation was based on quantification of the elements Al, As, Ba, Be, B, Ca, Cd, Co, Cr, Li,...
CHEMICAL AND PHYSICOCHEMICAL CHANGES WITH SUCCESSIVE APPLICATIONS OF RAW DOMESTIC SEWAGE AS A FINAL DISPOSAL ALTERNATIVE OF FORAGE CULTIVATION
Considering the significant expenses with fertilizer and irrigation, the use of wastewater in fertirrigation has been studied as an alternative, since it can supply part of the water demand and provide nutrients to the p...
MATHEMATICAL MODELING OF DYNAMIC PROCESSES IN ESSENTIALLY NONLINEAR MECHANICAL SYSTEMS WITH LUMPED PARAMETERS
The paper presents a system of differential equations that describe the processes of motion transfer in mechanisms taking into account the essential nonlinearities caused by hysteresis phenomena, dead zones, pressure lim...