Abstract: The invention relates to the field of construction, particularly to welding of above- and underground high-strength pipelines with controlled heat input. Application of the invention will increase the load-bearing capacity of the pipelines made with the use of butt-welded pipes, pipe spools, pipe strings. The method includes joining of two or more cylindrical metal pipes, pipe spools and pipe strings by the welded ring butt with the use of the arc welding for the whole perimeter of the pipe. Criteria for a high-quality welded joint include optimal selection of parameters of the welding thermic cycle. The suggested welding method allows to have the optimal structure, high strength and viscoplastic properties in areas of the welded joint, to provide for the required load-bearing capacity of the pipeline and its reliability during operation.

Abstract: A heat-insulated box for insulating parallel-slide valves includes multiple sections each including an outer protective steel envelope with a heat insulation coating on an inner surface. A number and configuration of sections is determined based on geometric parameters of the insulated valve. Some sections include two semi-cylindrical segments rigidly coupled together and oriented in mutually perpendicular directions such that one segment can be installed on the valve and one segment can be installed on the pipeline. The box also includes stiffeners at the junction of the two semi-cylindrical segments. The sections include shock-absorbing sealing gaskets made of cellular rubber substance to ensure a tight seal of the box. The box includes a locking mechanism for coupling the sections together.

Abstract: The invention relates to pipe heat insulation and in particular to methods of heat insulation installation on welded joints of subterranean pipes for transporting oil and oil products. The method includes applying an anticorrosive layer on the welded joint using heat-shrinkable polymeric tape, mounting heat insulating polyurethane foam pipe coverings on the tape, using tie straps with locks to secure the pipe coverings, gluing hot-melt adhesive tape at the edges of a pipe protective envelope to overlap the envelope and the pipe coverings, installing a metal casing symmetrically relative to the center of the weld joint, and sealing the metal casing and the envelope with a heat-shrinkable polymeric fabric. The technical result provides anticorrosive protection and heat insulation of the welded joint of steel pipelines, provides improved heat insulation installation on the pipeline, and reduces the cost of installation and labor intensity.

Abstract: The invention relates to pipe heat insulation and to methods of heat insulation installation on weld joints of pipes for transportation of oil and oil products. The heat insulation of pipe weld joints for subsurface pipelining mounting includes an anticorrosive protection of welded pipe joints using heat-shrinkable polymeric tape, heat insulating polyurethane foam pipe coverings mounted on the junction, that are held together with a tie strap locks, hot-melt adhesive tape glued at the edges of the pipe protective envelope with overlap on the pipe coverings of polyurethane foam and protective galvanized metal casing installed symmetrically relative to the center of the weld joint, the surface of which is sealed with a heat-shrinkable polymeric fabric.

Abstract: The disclosure relates to a saddle support for use in above-ground pipeline construction in severe geological conditions, such as permafrost. The support provides structural stability and redistribution of a load from a pipeline to a pile foundation. The saddle support includes the spool coupled to four adjustable stands through electric insulating units. The stands can be adjusted to change a height and slope angle of the support and are fastened to a single-level pilework that supported by the pile foundation via flanges. The spool is a pipe having an external case and a heat-insulating layer. Longitudinal ribs are fastened to the spool to fasten the spool to the stands. The load-bearing structure of the spool resists axial and side movements of the pipeline and transfer the load absorbed by the spool to the pilework foundation via the electric insulating units on the adjustable stands.

Abstract: A pipeline support for use in severe geological conditions such as permafrost provides stability, strength and immovability of the pipeline support under relatively high pressure and that that allows an adjustment of a height or slope of the pipeline support. A method of using the support includes controlling the height or slope angle of the support during operation of the pipeline support. A spool of the support is installed and fixed on two support axes that are transverse beams installed in support frames and that can be moved along with the support spool. After that, movable power-operated mechanisms are positioned under each support axis. These mechanisms lift or lower the spool and support axes to the desired height and slope. The support axes are then fixed in frames at the desired height and spool slope angle.

Abstract: A heat-insulated box for insulating parallel-slide valves includes multiple sections each including an outer protective steel envelope with a heat insulation coating on an inner surface. A number and configuration of sections is determined based on geometric parameters of the insulated valve. Some sections include two semi-cylindrical segments rigidly coupled together and oriented in mutually perpendicular directions such that one segment can be installed on the valve and one segment can be installed on the pipeline. The box also includes stiffeners at the junction of the two semi-cylindrical segments. The sections include shock-absorbing sealing gaskets made of cellular rubber substance to ensure a tight seal of the box. The box includes a locking mechanism for coupling the sections together.

Abstract: The invention relates to the field of construction, particularly to welding of above- and underground high-strength pipelines with controlled heat input. Application of the invention will increase the load-bearing capacity of the pipelines made with the use of butt-welded pipes, pipe spools, pipe strings. The method includes joining of two or more cylindrical metal pipes, pipe spools and pipe strings by the welded ring butt with the use of the arc welding for the whole perimeter of the pipe. Criteria for a high-quality welded joint include optimal selection of parameters of the welding thermic cycle. The suggested welding method allows to have the optimal structure, high strength and viscoplastic properties in areas of the welded joint, to provide for the required load-bearing capacity of the pipeline and its reliability during operation.

Abstract: The invention relates to fire and heat insulation of pipes, and specifically to the installation of fire and heat insulation on welded joint of pipes that are used for transporting oil and oil products. The method for installing heat insulation of welded joints of pipes for above surface pipelining includes providing anticorrosive protection of the welded joint of pipes using a heat-shrinkable polymeric tape, installation of glass foam pipe coverings on the joint, fastening the pipe coverings using tie bands with locks, sticking hot-melt adhesive tape on the edges of the protective envelope of the pipe overlapping the glass foam pipe coverings, and mounting a protective galvanized metal housing symmetrically to a center of the welded joint. The technical result provides anticorrosive protection and heat insulation of the welded joint, and the proposed method reduces cost and complexity of installation.

Abstract: The invention relates to pipe heat insulation and in particular to methods of heat insulation installation on welded joints of subterranean pipes for transporting oil and oil products. The method includes applying an anticorrosive layer on the welded joint using heat-shrinkable polymeric tape, mounting heat insulating polyurethane foam pipe coverings on the tape, using tie straps with locks to secure the pipe coverings, gluing hot-melt adhesive tape at the edges of a pipe protective envelope to overlap the envelope and the pipe coverings, installing a metal casing symmetrically relative to the center of the weld joint, and sealing the metal casing and the envelope with a heat-shrinkable polymeric fabric. The technical result provides anticorrosive protection and heat insulation of the welded joint of steel pipelines, provides improved heat insulation installation on the pipeline, and reduces the cost of installation and labor intensity.

Abstract: The disclosure relates to a saddle support for use in above-ground pipeline construction in severe geological conditions, such as permafrost. The support provides structural stability and redistribution of a load from a pipeline to a pile foundation. The saddle support includes the spool coupled to four adjustable stands through electric insulating units. The stands can be adjusted to change a height and slope angle of the support and are fastened to a single-level pilework that supported by the pile foundation via flanges. The spool is a pipe having an external case and a heat-insulating layer. Longitudinal ribs are fastened to the spool to fasten the spool to the stands. The load-bearing structure of the spool resists axial and side movements of the pipeline and transfer the load absorbed by the spool to the pilework foundation via the electric insulating units on the adjustable stands.

Abstract: A pipeline support for use in severe geological conditions such as permafrost provides stability, strength and immovability of the pipeline support under relatively high pressure and that that allows an adjustment of a height or slope of the pipeline support. A method of using the support includes controlling the height or slope angle of the support during operation of the pipeline support. A spool of the support is installed and fixed on two support axes that are transverse beams installed in support frames and that can be moved along with the support spool. After that, movable power-operated mechanisms are positioned under each support axis. These mechanisms lift or lower the spool and support axes to the desired height and slope. The support axes are then fixed in frames at the desired height and spool slope angle.

Abstract: The invention relates to heat insulation of pipes, and specifically to the installation of heat insulation on welded joint of pipes that are used for transporting oil and oil products. The method for installing heat insulation of welded joints of pipes for above surface pipelining includes providing anticorrosive protection of the welded joint of pipes using a heat-shrinkable polymeric tape, installation of polyurethane foam pipe coverings on the joint, fastening the pipe coverings using tie bands with locks, sticking hot-melt adhesive tape on the edges of the protective envelope of the pipe overlapping the polyurethane foam pipe coverings, and mounting a protective galvanized metal housing symmetrically to a center of the welded joint. The technical result provides anticorrosive protection and heat insulation of the welded joint, and the proposed method reduces cost and complexity of installation.