SIS a leading ISO 9001:2008 company has been offering its services in NDT, Welding and Painting for the past several years. Since its inception, SIS has committed itself in catering the existing needs of our customers with your everlasting support we proudly announce that we are offering CSWIP 3.1, CSWIP 3.2 & B-GAS 3/2 courses in Chennai as well in some parts of India.