IS 3370 is an Indian Standard that provides guidelines for the protection of concrete structures from the effects of water and chemicals. It focuses on the durability of concrete in various environments, particularly in structures like water tanks, sewage treatment plants, and marine structures. The standard outlines methods for assessing the quality of materials, construction practices, and maintenance procedures. By following IS 3370, engineers and builders can ensure that concrete structures remain safe and functional over time, reducing the risk of damage and costly repairs.