Form: This specification covers one grade of brass in the form of seamless tubing. Application: Primarily for parts requiring resistance to corrosion by salt@ water@ salt air@ or gases. Classification: Tubing is classified by tyupes as follows: Type I - Nominal working pressure 100 psi (689 kPa) Type II - Nominal working pressure 200 psi (1379 kPa) Type III - Nominal working pressure 300 psi (2068 kPa) Type IV - Nominal working pressure 400 psi (3103 kPa)