I hope you are looking for non-metal pipes manufacturing. If so,
There is a strong push by Indian Govt on use of PVC pipes; however the environmental conditions must be met. The PVC has Lead which is hazardous; hence the use of non-metallic stabilizers is a must.
In order to get more information you can go to CIPET (Central Institute of Plastic Engineering Technology). This Institute has many branches all over India.
For your information, the large players in this market are Supreme Pipes, Prince Pipes, Finolex and Jindals. These companies have a market share of nearly 60% in India.
Then there are many unbranded manufacturers as well. These companies produce sub-standard products and have very high Lead content, The prices are lower by 40% to 50% than the branded.
In case you are looking for metal based pipes then you can visit NASPD (National Association of Steel Pipe Industries). This industry is capital intensive and large players exist for many decades such as Tata Steel, Brilas, Swastik, Jindals, etc. There are many large players.