Process flow
Seiko Huayang ERW steel pipe process flow, thermal expansion production process flow
ERW Steel Pipe Production process
01
Raw material preparation
02
Leveling head cutting and butt welding
03
Spiral Looper
04
Molding System
08
Ultrasonic
07
Cooling treatment
06
medium frequency annealing
05
Welding
09
sizing and straightening
10
fixed length
11
Hydrostatic test
12
Finished product inspection
LSAW Steel Pipe Production process
01
Feeding
02
Material loading inspection
03
Welding and quenching arc plate
04
Ultrasonic plate probe
08
Pre-welding
07
JCOE Molding
06
Pre-bending
05
Edge Milling
09
Inspection and repair after pre-welding
9.5
inner wall dust removal
10
Internal welding
10.5
internal welding slag removal
14
X-ray flaw detection
13
Ultrasonic testing continuous testing
12
cut-out arc plate
11
External welding
15
Mechanical expansion
16
Hydrostatic test
17
straightening and rounding
18
chamfered
22
Automatic spray meter
21
Appearance and geometric dimension inspection weighing and length measurement
20
X-ray flaw detection
19
Ultrasonic flaw detection continuous detection
23
Collection inspection