The Paton Welding Journal, 2009, №09



2009 №09 (03)

2009 №09 (05)

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TPWJ, 2009, #9, 23-28 pages  
PECULIARITIES OF APPLICATION OF SPLIT TEE-JOINTS IN REPAIR AND RECONSTRUCTION OF MAIN PIPELINES IN SERVICE CONDITIONS


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 9, 2009 (September)
Pages                      23-28
 
 
Authors
V.S. BUT, E.A. VELIKOIVANENKO and O.I. OLEJNIK
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
The effect of thickness of walls of the connecting elements, internal pressure during installation, and distance between the circumferential welds that connect a tee-joint to pipeline on geometric dimensions of the above welds was studied. Nomograms were plotted to determine allowable pressure in hydraulic tests of the resulting welded joints, depending upon the length of an installed tee-joint and rigidity of a pipeline. Examples of application of the design and technological solutions are given.
 
 
Keywords: main pipeline, split tee-joint, circumferential welds, internal pressure, hydraulic tests, rigidity of shells, implementation of technological developments
 
 
Received:                21.05.09
Published:               28.09.09
 
 
References
1. But, V.S., Gretsky, Yu.Ya., Rozgonyuk, V.V. (2001) Substantiation of a new approach for performing welding operations on pressurised pipelines. Naft. i Gaz. Promyslovist, 4, 33-39.
2. Makhnenko, V.I., But, V.S., Velikoivanenko, E.A. et al. (2001) Mathematical modelling of pitting defects in active oil and gas pipelines and development of a numerical method for estimation of permissible parameters of arc welding repair of defects. The Paton Welding J., 11, 2-9.
3. Yakubek, P. (2007) Mounting of tee-joints and T.D. Williamson fittings on pipeline in-service. In: Proc. of Int. Conf. on Welding and Related Technologies in Building, Improvement and Repair of Gas and Oil Pipelines (Moscow, 22-23 Nov. 2007).
4. Makhnenko, V.I., But, V.S., Velikoivanenko, E.A. et al. (2003) Estimation of permissible sizes of welds for mounting T-joints and sleeves on active main pipelines. The Paton Welding J., 8, 6-11.
5. Milne, I., Ainsworth, R.A., Dowling, A.R. et al. (1986) Assessment of integrity of structures containing defects: CEGB Report R/H/R6, Rev. 3, Apr. 1986.
6. Volmir, A.S. (1967) Stability of deformable systems. Moscow: Nauka.

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