20INCH API ERW PIPE MILL LINE YEAR 1977

20inch API ERW Pipe Mill Line
Pipe diameter: 5inch~20inch
Pipe thickness: 3~12.7mm
Length: Max.20m
Production capacity: 140,000ton/year
Installation year:1977
Final Maintenance and Overhaul year:2013
(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) Forming
- Driving motor : DC450KW 850/1700 RPM
3) Welder
Make: Thermatool(U.S.A) / Drive:Yaskawa(Japan)
- Max. plate volt : 20KV, DC
- Filament volt : 17.5 volts
- Max. plate current : 50 AMPS D.C
- Grid current : 9 Amps frequency : 400 KHZ
4) Seam Annealer - 400KW, 3KHX (1unit), 600KW, 2KHX (1unit)
5) Sizing
Make: WYKO(England)
Year:1986
- Driving motor : AC 150HP
6) Cut-Off
- Driving motor : DC45KW ×850/240
7) End Facer
- Spindle speed : 250 ~ 600 RPM
8) Ultrasonic tester
Make: NDT(Korea)
Year:2008
- Pressure Intensifier: 120 ㎏/㎠ ~ 500 ㎏/㎠
Outer diameter : 130 ~ 610mm/Length : 5,000 ~ 20,000mm
Detecting method: Seam U/T, Full body U/T
10) Varnish Coater
Make: Sejon(Korea)
Year:2016
Airless cold spray type, 5