Harve offers pipe double jointing lines. This enables double jointing of 12meter long pipes to get 24meter long pipes, so the line has flexibility to make 18meters as well as 24meters pipe. The line comprises of pipe aligning station along with internal clamps.
This line can do the jointing of pipes diameter ranging from 16’’ to 48’’ and wall thickness ranging from 8mm to 40mm.
Process Chart :
1. Input Pipe Material / Fork Lift or Crane
2. MT Test / MT Test Equipment
3. Beveling / Beveling Machine
4. Pipe Fit-Up / Internal Line-Up Clamp
5. External Welding / External Welding System
6. Internal Welding / Internal Welding System
7.Air Blowing for Cleaning Inside Pipes
8. NDT / X-Ray / A.U.T System
8-1. Repair if defected
9. Stock
Overview :
Basic Information
Process
Unit
NPS
THK
Pipe Length
Required Capacity
Shift Times
Double Join Line
Minimum
18 inch
8 mm
Min. 10 mm
Min. 200 Joint
3 Shift/day
Maximum
56 inch
35 mm
Max. 12.2 mm
Max. 300 Joint
Working Method
Beveling
Fit-up
External Welding
Inside Welding
NDT
Repair/Release
Root W/D
Main W/D
Root W/D
Main W/D
Facing M/C
Internal Clamp
SAW
SAW
X-RAY(RT)
(In case of
defects)
Facing Machine
Internal Line up Clamp
External Welding
Internal Welding
Beveling Method :
Beveling Plan
Process
OD(Inch)
Equipment
Range of Out-Diameter (Inch)
Total
12”-24”
24”-36”
36”-48”
48”-56”
Beveling
Min.18
Pipe Facing Machine
1
1
1
1
4
Max.56
Hydraulic Unit
1
1
1
1
4
Cutting Speed
100m/min.
Clamping
Hydraulic + Max. 70kg/cm2
Rotating
26~48rpm
Note: In terms of one-side beveled in the process of manufacturing.
X-Groove (Sample)
Beveling Machine / Hydraulic Unit
Fit-up Method :
Fit-Up Plan
Process
OD(Inch)
Equipment
Range of Out-Diameter (Inch)
Total
16”-18”
20”-22”
24”-26”
28”-30”
30”-32”
Fit-Up
Min.18
/
Max.56
Internal Line-Up
Clamp
1
1
1
1
1
10
34”-36”
36”-38”
40”-42”
46”-48”
52”-48” & 56”
1
1
1
1
1
Drive Type
Air Motor + Chain
Air Pressure
5Kgf/cm2
Application
Material
Carbon/Stainless(Only modification)
Note: Depends on the volume of each specification, the quantity can be changed.
X-Groove (Sample)
External Welding System :
General Capacity
[Condition] OD: 24 / Circle Length: 191.4mm / Thickness: 20mm / Daily Working Time: 20Hours
Process
Pass No.
Deposition
Welding Speed
Time/Pass
Arc rate
(%)
Welding
Time(min)
Daily
Production(Joint)
Dual(1.5%)
External
Welding
Pass-1
4mm
135cm/min.
1.4min.
55%
7.7
155
233
Pass-2
4mm
135cm/min.
1.4min.
Pass-3
4mm
135cm/min.
1.4min.
Lateral View –”SAMPLE”
Internal Welding System :
General Capacity
[Condition] OD: 24 / Circle Length: 191.4mm / Thickness: 20mm / Daily Working Time: 20Hours
Process
Pass No.
Deposition
Welding Speed
Time/Pass
Arc rate
(%)
Welding
Time(min)
Daily
Production(Joint)
Internal
Welding
Pass-1
4mm
85cm/min.
2.3min.
50%
4.6
260
Control System :
Control System & Power Source
External Welding Controller
Internal Welding Controller
Welding Machine
Layout Drawing
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