20INCH(508MM) API ERW PIPE MILL LINE

20inch(508mm) API ERW Pipe Mill Line
Make: Ilsin(Korea)
Installation year: 1977
Stopped year: November/2019
Pipe diameter: 5inch(127mm)~20inch(508mm)
Pipe thickness: 3~12.7mm
Pipe length: 6~20m
Product Grade: API 5LX-70 20B X 12T, API 5CT J-55 13B X 10.92T
Production capacity: 50ton~80ton/hour(18~20inch pipes)
Line Speed: 35m/min
Reversing speed: 40m/min
The weght of rolls( 5inch~20inch)
Total 529 tons
(5inch: 43tons, 6inch:43tons ,7inch: 43, 7.625 inch: 43, 8inch; 43,
9inch: 43, 10inch: 26, 12inch; 43, 13inch: 43, 14inch: 26,
16inch: 47, 18inch:31tons, 20inch: 55tons)
(Retrofit)
Sizing part was changed by brand new in 2011
On line /Off line UT was installed in 2006
Hydro tester was retrofitted in 2011
Seam anneler 600kW(2000HZ) 2 units were changed by brand new in 2010 and 2013
(Drive)
Paker(U.S.A), Toyodenki(Japan), Mitsubishi(Japan)
(Process)
Uncoiler-Forming-Welder-Seam annealer-Sizing mill-
Cut off machine-Hydro tester, E/F- Ultrasonic tester-
Varnish coater-Product
(Equipment list)
1) UNCOILER
- Driving motor : DC45KW ×850/2400
- Hydraulic cylinder: : 180Φ×1500stroke
2) WELDER
Make: Thermatool(U.S.A) / Drive: Yaskawa(Japan)
- Max. plate volt : 20KV, DC
- Filament volt : 17.5 volts
- Max. plate current : 50A D.C
- Grid current : 9A, frequency : 400 KHZ

3)FORMING
- Drving motor : DC450KW 850/1700 RPM
- Min reducer : 6.792 :1
4)FIN PASS
- Driving motor : DC 150KW
- Main reducer : 6.792 :1
5)PULL OUT
- Reducer : 1st : 1/60. 008 2nd : 1/118.86
6)SURFACE BEAD CUTTER
-Air cylinder : 80Φ×60 ST
7)SEAM ANNEALER
-600KW, 2KHZ( Themotool:USA) year 2010
- 600KW, 2KHZ(PSTEK:Korea) year 2013
- Annealing pipe size : 5