method of connecting field, u0441u043au0432u0430u0436u0438u043du043du044bu0445 or other tubes for the harsh conditions of work,the connecting pipes are roaring past u043au0443u0437u043du0435u0447u043du043eu0439 weld and a recovery gas heated ends of pipes during at least part of the operation u043au0443u0437u043du0435u0447u043du043eu0439 st. arch.for the removal of oxides from all pipes subjected to u043au0443u0437u043du0435u0447u043du043eu0439 welding, and limit the number of oxide inclusions and cavities between the ends of pipes, u043fu043eu0434u0432u0435u0440u0433u0430u044eu0449u0438u043cu0438 xia u043au0443u0437u043du0435u0447u043du043eu0439 welding.the ends of pipes can be u0437u0443u0431u0447u0430u0442u0443u044e or u043du0435u043fu043bu043eu0441u043au0443u044e form to prevent any dramatic changes in the strength of the walls in place, welding and / or reduce the u0441u0434u0432u0438 u0433u0430u044eu0449u0438u0445 forces u043au0443u0437u043du0435u0447u043du043eu0439 seam welding.when the pipes are tied in knots and / or radially u0440u0430u0441u0448u0438u0440u044fu044eu0442u0441u044f.u043cu0435u0436u0434u0443u043du0430u0440u043eu0434u043du0430u044f application was published, together with the report on the international market.
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