I.S.T. applies strict standards in view to the production of piggable pipes and elbows since the quality of these parts has a high influence on the pigging result. Pipe tolerances, ovality, surface quality, material thickness and the quality of the welded seams are the most important parameters. Piggable elbows are produced in a special method so that the roundness discrepancies are kept within small tolerances. I.S.T. offers a wide range of pipes and elbows for various applications. Of course all parts are also available for the application in the chemical industry according to DIN 2430.