FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling. Continuously-cast, forged billets, solid and hollow ESR 400-650 mm-sized ingots-billets are heated to ductility temperature. Threes are broached at helical rolling mills at short mandrel to sleeves or sleeve-blanks at one stand. Sleeves-billets are broached-rolled at short mandrel at second helical rolling mill without heating or after reheating. Sleeves are blown and transferred to Pilger mills. Sleeves are rolled in rolls with body diameter varying from 975 to 1250 mm with multiple 25 mm increase per every next diameter of the size spectrum pipes with gages of 280-562 mm at mandrels with taper of 1.0-6.0 mm subjected to the steel linear expansion factor. Pilger heads and seed ends, process wastes, are removed. Pipes are cut to multiple lengths by hot cutting saws and heated in continuous sectional furnaces or furnaces with walking beams. Pipes are gaged and carried on conveyors with rotation. Pipes are straightened in six-roll straightening machines, inspected and subjected to further machining.
EFFECT: lower metal input.
8 cl
| Title | Year | Author | Number |
|---|---|---|---|
| PRU WITH PILGER MILLS FOR ROLLING OF SEAMLESS HOT-ROLLED 273-630 mm-DIA PIPES | 2013 |
|
RU2533614C1 |
| PRODUCTION OF 426×90 MM SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL AT PRU 8-16'' WITH PILGER MILLS | 2013 |
|
RU2537639C1 |
| METHOD OF PRODUCTION OF SEAMLESS HOT-ROLLED LARGE- AND MEDIUM-DIAMETER PIPES FROM STEEL AND ALLOYS AT PIPE ROLLING PLANTS WITH PILGRIM MILLS FROM TUBULAR BLANKS | 2012 |
|
RU2502570C1 |
| METHOD OF PRODUCTION OF 426×15-30 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH CRITICAL AND SUPERCRITICAL STEAM PARAMETERS OF STEEL GRADE "10Х9МФБ-Ш" | 2013 |
|
RU2567427C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 630×28-32×4800-5500 mm FROM "15Х1М1Ф" AND "10Х9МФБ-Ш"-GRADE STEELS AT PRU 8-16" WITH PILGER MILLS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING WITH HIGHER MECHANICAL PROPERTIES | 2012 |
|
RU2530090C2 |
| METHOD TO PRODUCE SEAMLESS PIPES WITH SIZE OF 377H14-60 MM FOR STEAM BOILERS, STEAM LINES AND HEADERS OF PLANTS WITH HIGH AND SUPERCRITICAL PARAMETERS OF STEAM FROM STEEL OF GRADE 10H9MFB-SH | 2012 |
|
RU2516161C1 |
| PRODUCTION OF 273×9-15 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
|
RU2530099C2 |
| PRODUCTION OF 550×25-30 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL | 2014 |
|
RU2570152C2 |
| PRODUCTION OF 273×9-60 mm SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS FROM ESR INGOTS OF "10Х9МФБ-Ш"-GRADE STEEL | 2013 |
|
RU2537413C2 |
| PRODUCTION OF SEAMLESS COLD-RESISTANT AND NONCORROSIVE 377×9-16 mm PIPES AT PRU WITH PILGER MILLS | 2013 |
|
RU2541228C2 |
