THE INTERNATIONAL CONFERENCE OF THE CARPATHIAN EURO-REGION
SPECIALISTS IN INDUSTRIAL SYSTEM
APPLICATION OF T.D. WILLIAMSON TECHNOLOGY IN GAS
Miloš Mičian, Assoc. prof., PhD.; Jozef Meško, Prof., PhD.; Ján Pleva, MSc., PhD.
František Banáš, MSc.
University of Žilina, Faculty of Mechanical Engineering, Department of Technological
Engineering, e-mail: firstname.lastname@example.org
A pipeline transport occupies in technical praxis a special role in meeting demands connected
to transport of liquid, gaseous and solid substances. These demands can very often stand in
opposition. A natural gas transport is almost exclusively provided by gas pipelines. The
pipeline operation is under special attention from security, economy and ecology point of
view. Despite of this special attention during operation and construction of pipelines there is
often necessary to make an intervention to the pipeline system in order to provide repair,
reorganization or other reason conditioned actions. All these interventions at a moment are in
Slovakia mainly carried out by T. D. Williamson technology (further as TDW).
Technical conditions for steels used in gas engineering
The usage of steel pipes has preferred position in chemical industry, power engineering, gas
engineering etc. Gas pipelines can be constructed from seamless tubes, longitudinal or spiral
welded seem tubes from steels suitable for welding according to STN 05 1309. The steels
have to have guaranteed chemical composition and mechanical properties. The basic
characteristics as chemical composition, guaranteed minimal yield strength, tensile strength,
elongation and notch ductility of separate strength groups used in tube production are
determined in technical standards.
Requirement to mechanical properties of tubes
According to standard STN 38 6410/Z1 there is necessary to prove mechanical properties of
tensile strength test of basic material according to STN EN 10002-1 + AC1 and w