FIELD: metallurgy.
SUBSTANCE: ingots are cast with further forging and machining to billets 585×1900±25 mm. In billets a central hole with diameter 90±5 mm is drilled. Al2O3 schooping and heating in mufflers to temperature 1150-1180°C are performed. The billets are pierced in helical rolling mill on the mandrel with diameter 375 mm to shells 585xID390×3300-3390 mm with drawing µ=1.76. The shells are rolled on the Pilger mill to the tube stocks with size 426×34×10500±250 mm with drawing µ=3.56-3.58 and fit as per diameter Δ=27.2%. Machining is performed, i.e. turning and boring of pipes with allowance Δme=19.3-20.3 mm at ends and allowance Δmb=19.6-21.4 mm along pipe body. Process wastes are removed from pipes by hot cutting saw, tube stock is straightened under temperature of roll heating on 6-hi straightening unit by two-three passes to maximum degree of curvature 6 mm per full pipe length. The tube stick is turned and bored to commercial dimensions 406.4+0.4/-0×14.38+0.28/-0.72 mm, at ends through length 520+10 mm, for buttress thread making, and along pipe body to size 406.4+4.0/-2.0×14.3 8+0/-1.8×10000+1007-0 mm.
EFFECT: implementation of new type of tube stock and commercial long pipes out of the titanium alloy Gr 29 to construct the geothermal wells.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PRODUCTION OF REROLLED "426×34×10500±250" mm PIPES AT PRU 8-16'' WITH PILGER MILLS FROM BILLETS OF TITANIUM ALLOY GR 29 | 2012 |
|
RU2523404C1 |
| METHOD OF MANUFACTURE OF COLD DRAWN TRADE PIPES OF 273×10×8700-9500 mm SIZE FROM TITANIUM ALLOYS PT-1M AND PT-7M | 2017 |
|
RU2640694C1 |
| METHOD OF COLD DRAWN TRADE PIPES MANUFACTURE OF 219×9×11700-12800 mm SIZE FROM TITANIUM ALLOYS PT-1M AND PT-7M | 2017 |
|
RU2638266C1 |
| METHOD OF COLD DRAWN TRADE PIPES MANUFACTURE OF 159x7x10000-11000 mm SIZE FROM TITANIUM ALLOYS PT-1M AND PT-7M | 2016 |
|
RU2615927C1 |
| PRODUCTION OF LARGE- AND MEDIUM-DIAMETER REROLLING PIPES FROM TITANIUM-BASED ALLOY INGOTS AND BLANKS AT PIPE ROLLING UNIT WITH PILGER MILL | 2012 |
|
RU2523372C2 |
| 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 METHOD OF TUBE STOCK OF LARGE AND MEDIUM DIAMETERS FROM TITANIUM-BASED ALLOYS | 2012 |
|
RU2511190C1 |
| PRODUCTION OF 426×15-60 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 | 2013 |
|
RU2545925C2 |
| METHOD TO PRODUCE HOT-ROLLED MECHANICALLY TREATED BIMETAL PIPES WITH SIZE VN279X36 (351X36) AND VN346X40 (426X40) MM FROM STEEL OF GRADES 10GN2MFA+08X18N10T WITH INTERNAL PLATING LAYER OF STEEL 08H18N10T WITH THICKNESS OF 7±2 MM | 2012 |
|
RU2516137C1 |
| PRODUCTION OF 377×14-60 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 | 2012 |
|
RU2537682C2 |
