Materials 316L&316&304 stainless steel available with order. Description Product: custom size 4 inch ss 316 stainless steel welded pipe sanitary piping Application fields: food processing ind ustry, water supply, water delivery, etc. Standard: ASTM A270, DIN 11850, etc. Introduction For dairy, beverage, construction, foods tuff, gas and oil convey and other sanitary Applications. Associated Tube s sanitary tube is ideal for the dairy, food and beverage industries where the highest degree of purity and cleanliness is essential. It is certified to the requirements of ASTM A269/270/312, 3A standards and most user specifications. Tubing is manufactured from the finest quality raw materials made exclusively to Associated Tube melt parameters. Customers have come to rely on the quality of our sanitary tube products as well as our uncompromised commitment to total customer satisfaction. Annealing Hydrogen bright annealed in line to 1900°F (1040° C) minimum and rapidly quenched. Surface Finishes Surface finish is 20 µ-in Ra (0.5 µm) ID maximum, 30 µ-in Ra (0.8 µm) OD maximum surface roughness measured per ASME/ANSI B46.1 with the profilometer reading at 90 degrees to the lay. Other finishes available upon request. Feature 316/316L stainless steel has a high resistance to many chemical corrodents and marine atmospheres. United Performance Metals offers both 316/316L stainless steel sheet and coil. 316/316L stainless steels are more resistant to general corrosion and pitting/crevices than conventional austenitic stainless steels.