Butt welding
Butt welding
Butt welding Procedure
 
Butt welding Procedure  
Butt welding Procedure
   
 
  BUTT WELDING FITTINGS  
  Welding Cycle

The welding cycle is divided in 5+1 different phases:

PHASE 1: Bead formation t1
PHASE 2: Heating up t l
PHASE 3: Change over t3
PHASE 4: Bringing up pressure t4
PHASE 5: Cooling down under pressure t5
PHASE 6: Cooling down out of the machine t6

Press here to view graphic shows all the phases

t1 = Time requested for the bead formation with the
Specified wall thickness
t2 = Time requested for the continual heating
t3 = Time requested for the change over
t4 = Time requested for bringing up the pressure
t5 = Time requested for cooling down
p2 = pressure during the continual heating
p1 = pressure during the bead formation and the cooling down

 
 
 
  Electro fusion
 
 
Electro fusion
 
  Repair
The pipe stops incorporated in the Durafuse couplers are shearable and have been provided for the specific purpose of using the fittings for making repairs or breaking into existing pipelines

The procedure to be followed is as follows and is also shown diagrammatically Press here

 
 
 
  Flange  
 
Flange