Shiva Polytubes Pvt. Ltd. Manufactures Fungi and Rust Free Pipes. Shiva Polytubes Pvt. Ltd. Is an ISO 9001 registered company. Fungi and Rust Free Pipes is higher grade of pipe made with better compounding and are more durable and sustainable than normal casing pipe. Fungi and Rust Free Pipes are available in the size of 15 mm to 125 mm for shallow & medium boring system. It is durable and long lasting pipes. These pipes are easy to install and low freight cost.