Effective immediately, De Dietrich Process Systems is providing a 5-year glass guarantee. De Dietrich Process Systems is the leading manufacturer for corrosion-resistant systems made of glass-lined steel and borosilicate glass 3.3. Due to their corrosion resistance and easy cleanability, these materials are suitable for universal use in systems for the pharmaceutical and chemical industries. They are ideally suited for processing highly corrosive media as mineral acids and halogens such as bromine.