US 4,340,163 AGranted

Apparatus for removal of internal flash from electric-welded pipes

OwnerAlexandr A. Romashov, Gennady E. Levinsky +3inventors

InventorsAlexandr A. Romashov, Gennady E. Levinsky, Vladimir Y. Ivantsov, Igor A. Astakhov, Vladimir A. Kuznetsov

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Abstract

An apparatus for internal flash removal is intended for use in pipe manufacture and comprises a hollow supporting bar inserted into a pipe being welded and carrying an oxygen duct with a main nozzle and a cooled ferrite-holder. An additional nozzle having an oxygen conduit common with the main nozzle is arranged downstream of the main nozzle in the direction of welding. The main and the additional nozzles have oval outlets of different clear openings and are arranged at different acute angles to the weld in the same plane passing through the pipe axis and the weld. The apparatus ensures a quality weld surface finish inside the pipe.

Claims8

Dependent claims

An apparatus for removal of internal flash from electric-welded pipes, comprising:

a hollow supporting bar inserted into a pipe being welded;
an oxygen duct incorporated in said hollow supporting bar;
a ferrite-holder mounted on said hollow supporting bar;
a main oxygen nozzle of said oxygen duct;
an additional oxygen nozzle placed downstream of the main nozzle with respect to the direction of pipe welding;
an oxygen conduit serving as a conduit common to said main and additional nozzles mounted on said oxygen duct and communicating therewith;
an oval outlet of said main nozzle;
an oval outlet of said additional nozzle, the outlets of the main and the additional nozzles having different sized openings;
said main and additional nozzles being arranged in a single plane passing through pipe axis and weld;
said main and additional nozzles being set in said plane at different acute angles with respect to the weld.

7 more elements

Dependencies are inferred from the claim text.