METHOD OF PRODUCING PIG PIPE SIZES 132,1(18 MM FOR MANUFACTURING COUPLINGS CRA-W BRANDS HN30MDB Russian patent published in 2016 - IPC B21B19/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to rolling production, in particular to method for producing seamless cold metal recycling pipe sizes 132.1×18 mm alloy HN30MDB-SH for manufacture of couplings for mounting tubing size 114.3×6.88×9,000-10,700 mm for production of gas and gas condensate in hydrogen sulfide environments. According to proposed method tube is produced by electroslag remelting smelting hollow ingots size of 470×110×2,700 mm or 430×105×2700 mm, turning and boring bars in hollow ingot, billet size respectively 460×100×2,700 and 420×95×2,700 mm, heating of ingots, billets to temperature ductility, pilger rolling mill at mandril cone in steel making, hot pipe size 290×35×9,500 mm or 260×30×8000 mm, or 310×40×7,600 mm or 288×45×6,200 mm, turning and boring metal recycling hot pipes in pig pipe measuring 300×30×3,200 mm or 273×30×4,600 mm rolling mill HPT in pig pipe size 132.1×18 mm.

EFFECT: you can reduce costs and improve quality of metal pipes.

4 cl, 1 tbl