+91 22 28805161         project@pipecoatingplant.com
 
 
 
Pipe Coating Plants for 3
Layer PE Coating +
Internal Epoxy Coating
Induction Bending
Machines for Pipes
Complete Operational Support for Pipe Coating Plants
 
 
Pipe Double Jointing Lines
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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