FIELD: oil industry.
SUBSTANCE: method comprises assembling the unit composed of shell whose length is at least equal to the sum of the lengths of the shells of two end valves, two flanges, and assembling parts. The flanges are welded to the both flanges of the shell, and their sealing surface are finished. The unit is connected with the bench for hydraulic test by means of temporal branch pipes. The assembling parts are set on the flanges alternatively. After hydraulic test and pressure relief, the end shell is cut into two end valves.
EFFECT: enhanced safety and reduced labor consumption.
5 cl, 3 dwg
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