FIELD: rolled tube production, namely process for rolling seamless hot rolled casing tubes for cutting buttress thread in standard and in cold resistant variant, possibly in tube rolling plant with pilger mills.
SUBSTANCE: method comprises steps of casting ingots with head, without it or continuously cast billets; heating them till yielding temperature; piercing in skew rolling mill to sleeves; rolling tubes in pilger mill; sizing them in sizing mill and in presses for calibrating end portions to nominal outer diameter in cold state 426 mm with limit fluctuation from nominal size (+1.0) - (-0.5)%. Such calibration is performed for minimum outer diameter in cold state whose value exceeds nominal diameter by 0.4 mm. Invention allows produce tubes with size 426 x 10 - 12 mm with buttress thread in tube rolling plant 8 -16".
EFFECT: lowered metal consumption, enhanced efficiency of threading, cutting off equipment and of hydraulic press, decreased cost of tube conversion of given assortment.
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| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR ROLLING SEAMLESS HOT ROLLED CASING TUBES WITH BUTTRESS THREAD | 2005 |
|
RU2311239C2 |
| METHOD FOR PRODUCING CASING TUBES FOR THREADING IN TUBE ROLLING AGGREGATES WITH PILGER MILLS | 2005 |
|
RU2301713C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED CASING PIPES AT PRU WITH PILGER MILLS FOR THREAD CUTTING | 2013 |
|
RU2545928C2 |
| MANUFACTURING METHOD OF SEAMLESS HOT-ROLLED CASING PIPES WITH DIMENSIONS OF 508×11,1, 508×12,7 AND 508×16,1 mm ON TPU 8-16" PIPE ROLLING UNIT WITH PILGER MILLS IN STANDARD AND COLD-RESISTANT CONFIGURATIONS | 2013 |
|
RU2545957C2 |
| METHOD OF MAKING WELL CASING SIZED TO 244,5×7,9, 244,5×9 AND 244,5×10 mm AT PIPE ROLLING UNIT WITH PILGER MILLS | 2012 |
|
RU2508955C1 |
| METHOD FOR PRODUCTION OF SEAMLESS HOT-ROLLED CASING PIPES WITH DIAMETRE OF 508 MM AT TUBE-ROLLING PLANT 8-16" WITH PILGER MILLS IN ORDINARY AND COLD-RESISTANT VERSIONS | 2007 |
|
RU2386501C2 |
| BUTTRESS THREAD CUTTING METHOD ON END PORTIONS OF CASING TUBES AND COUPLINGS | 2005 |
|
RU2301726C2 |
| METHOD OF FABRICATION OF COMMERCIAL PIPES WITH SIZE 406,4+0,4/-0×14,38+0,28/-0,72 mm FROM TITANIUM ALLOY Gr 29 FOR FURTHER USE IN GEOTHERMAL WELLS CONSTRUCTION | 2013 |
|
RU2542132C2 |
| PRODUCTION METHOD OF SEAMLESS PIPES OF MAJOR AND MIDDLE DIAMETRES FOR STEAM BOILERS, STEAM PIPELINES AND COLLECTORS OF UNITS WITH HIGH AND OVERCRITICAL STEAM PARAMETERS | 2007 |
|
RU2353446C2 |
| METHOD OF PRODUCING SEAMLESS HOT-DEFORMED LARGE- AND MEDIUM-DIAMETRE PIPES AT PIPE ROLLING UNITS WITH STEP-ROLLED MILLS | 2008 |
|
RU2401171C2 |
