I am interested in locating a material that can withstand a strong alkaline medium (10 M KOH) and approx. 5 atm pressure....... I am somewhat new to material chemistry so all I have been able to think of thus far is PVC pipe. Through my research I have discovered that PVC is highly fire retardant, durable, and has high tensile strength. These are all very important qualities for my intended design. However, I am unsure of its reaction to highly acidic or basic media. Also, I'm not sure if there are any better alternatives. Any ideas would be much appreciated.