... induction high frequency welding equipment ERW welded pipe making machine: to make welded pipes by forming & sizing machine ... and induction high frequency welding equipmentModel of welded pipe machine:Φ20,Φ32,Φ50,Φ76, Φ89,Φ114,Φ ... models are not fixed, the production of pipe machine is accordance with customer's requirement.your ... of square/rectangular pipes ERW welded pipe making machine