New demonstration system from I.S.T. Molchtechnik

When planning pigging systems, it is important to select the best options from a variety of different fittings and distributors.

In order to not only show these choices theoretically, but also to demonstrate their practical functionality, I.S.T. designed a new demonstration facility.

A single pig and a two pig system are integrated, which can be controlled separately or together.The control is carried out via a Siemens S7, communication with the sensors and actuators takes place via two different bus systems, which were chosen to illustrate the possibilities.

Two T-fittings, T40, were used in the single pigging system, one of which had a pig changing function. With this system, the medium is first pumped through the pipeline. After pumping is complete, the pig empties the line from the sending station to the receiving station. The pig is then returned to the transmitting station, where it is ready for the next pigging process.

For the two-pig system, a T-piece was used as a transmitting station and a T-ring valve with a receiving station. The first pig is moved out of the sending station with the medium, so there is one pig in each sending and receiving station during pumping. After delivery, the line contents can be moved into the T-outlet of the T-ring valve or back into the transmitting station (the T-piece).

Both pigging systems can be connected to one another at a pipe crossing. For this purpose, a piggable distributor account of the T56 design was used. If the distribution node is opened, the lines are connected to each other. At the same time, the opened internal slider takes on a newt catching function. This allows the medium to be pigged up to and from the distribution node to achieve complete emptying of the line.

This distribution node can be connected to form a matrix arrangement and can thus be used for complex, piggable distributions. Further details in the product catalog under T56.

The demonstration system can be viewed in Hamburg, at the I.S.T. headquarters, by arrangement.