In-line seam annealing equipment for tubes and pipes

For over 5 decades, EMMEDI has earned an outstanding reputation in the tube and pipe industries. The renowned high reliability, easy maintenance and the energy saving features of the entire EMMEDI product line have led to a recognition of the brand worldwide.

The in-line seam annealing equipment is used to treat the weld seam of API and ASTM tubes and pipes (either by seam normalizing or seam tempering process) to remove unwanted martensite and prevent failure during flattening and flaring tests.

The in-line seam annealing equipment by EMMEDI stands out for its robust design and efficient IGBTs technology. The systems are equipped with a specially designed coil with flux-concentrators that guarantee excellent performance (process temperature 950 to 980 °C at 1 to 3 kHz as typical working frequency). In addition, the manual or automatic seam tracking system keeps on track the inductor on the HAZ in tilted conditions (+/- 15° respect the vertical axis): thanks to the great smart process control system, it is possible to monitor both equipment and process. Furthermore, thanks to the smart control desk, it is easy for the operator to download production data, store recipes and guarantee production results.

The seam annealing equipment also includes pyrometers at each floating head to locally monitor the temperature and allow for flexibility in the temperature path. The analog signal coming from the pyrometer together with a pre-determined feedforward value is used to control the power converters according to required temperature. The actual reading is compared with the set point and, depending on the situation, the power reference can be increased or decreased by means of PID to meet the temperature requirements.

For more information, make sure you contact SAET EMMEDI through the references on the side, or download the PDF >>