HDCH Heavy duty, pipe coiling attachments for producing bound coils. A flange with taper pintle is fitted into each arm of the pintle loading ( PLW orGWS) machine. A mandrel is then placed in between the pintles and the arms closed. The coil is then wound onto the mandrel until the required quantity is loaded. The coil is then bound and cut and the coil supported. The arms of the PLW machine is then opened and the coil compl ete with mandrel are removed. The mandrel automatically collapses to facilitate its removal. The coiling head can be produced in any client specific size.