FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling. Ingots are cast at electric or open-hearth furnaces. They are forged to 650×1575+25/-100 mm forged pieces. Said forged pieces are turned to 630±10×1575+25/-100 mm pipe billets. Through central 100±5 mm diameter bore is drilled therein. Ingots are heated to ductility temperature and pierced at screw rolling mill to 640×365ID×2100±50 mm sleeves at 350 mm diameter mandrel. Ingots are heated to ductility temperature and pierced and rolled at screw rolling mill to 640×510ID×3750+/-100 mm sleeves at 495 mm diameter mandrel. Sleeves with curvature not over 10 mm are heat treated, bored and turned to commercial 610×36.53×3550±50 mm pipes with surface smoothness Rz not over 40 mcm. Rings are cut off for mechanical tests, ends are trimmed, two-sized chamfering is performed, ultrasound control and inspection are carried out.
EFFECT: higher surface quality and precision.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| BILLET FOR PIERCING AND ROLLING AT HELICAL ROLLING TWO-ROLL MILL OF 650×"500BH"×3250-3650 mm SLEEVE-BILLET FOR THEIR REROLLING TO COMMERCIAL 610×36,53×3150-3550 mm PIPES OF 15X5M-GRADE STEEL COMMUNICATIONS OF OIL REFINERIES WITH HIGHER-PRECISION GEOMETRICAL SIZES | 2013 |
|
RU2533612C2 |
| PRODUCTION OF SEAMLESS HOT-WORKED MACHINED 610×36,53×3000-3450 mm FROM 15X5M-GRADE STEEL FOR REFINERY COMMUNICATIONS WITH STRINGENT REQUIREMENTS TO GEOMETRICAL SIZES | 2013 |
|
RU2537638C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED MACHINED 610×36,53 mm PIPES OF 15X5M GRADE STEEL FOR COMMUNICATIONS OF REFINERIES | 2013 |
|
RU2545948C2 |
| PRODUCTION OF SEAMLESS HOT-WORKED MACHINED 610×36, 53×3100-3300 mm FOR REFINERY COMMUNICATIONS WITH STRINGENT REQUIREMENTS TO GEOMETRICAL SIZES | 2013 |
|
RU2542153C2 |
| PRODUCTION OF SEAMLESS HOT-WORKED MACHINED 610×36,53 mm FROM 15X5"M"-GRADE STEEL FOR REFINERY COMMUNICATIONS WITH STRINGENT REQUIREMENTS TO GEOMETRICAL SIZES | 2013 |
|
RU2530113C1 |
| PRODUCTION OF SEAMLESS HOT-STRAINED MACHINED 610×36,53×3200-3550 mm PIPES FROM "08Х18Н10Т-Ш" GRADE STEEL FOR NUCLEAR POWER PRODUCTION | 2013 |
|
RU2535251C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED 550×25 mm PIPES AT 8-16" PRU WITH PILGER MILLS | 2012 |
|
RU2547973C2 |
| PRODUCTION OF SEAMLESS HOT-STRAINED MACHINED 610(36,53(3000-3400MM-PIPES FROM "08-18=10T-+"-GRADE STEEL FOR NUCLEAR POWER PRODUCTION | 2013 |
|
RU2537412C2 |
| ESR BLANK-INGOT FOR PIERCING AND ROLLING-OFF AT TWO-ROLL SCREW ROLLING MILL TO REROLLED SLEEVES-BLANKS FOR PRODUCTION OF MACHINED 610×36,53×3200-3550 mm PIPES FROM "08X18H10T"-GRADE STEEL FOR NUCLEAR POWER ENGINEERING STRUCTURES | 2013 |
|
RU2530430C1 |
| METHOD OF PRODUCTION OF SEAMLESS HOT-WORKED BOILER AND STEAM LINE 530×30-75 MM PIPES FROM "10Х9К3В2МФБР-Ш " GRADE REFRACTORY STEEL FOR POWER EQUIPMENT WITH STEAM SUPERCRITICAL PARAMETERS | 2014 |
|
RU2558319C1 |
