Stainless steel pipe fittings are still widely used in many industries because of their relatively low cost, widespread familiarization among users, lack of alternative port designs offered by many component manufacturers. These stainless steel fittings are excellent for applications that require metal-only seals' corrosion resistance. Threaded Pipe Fittings Class 150 304 stainless steel has good corrosion resistance. In addition, 316 stainless steel has a higher nickel content for better corrosion resistance. Use stainless steel Schedule 40 pipe fittings with air, water, oil, natural gas, and steam. The corrosion resistance is a valuable asset to wash down environments typically required in food and beverage industries.