ASTM A 333 Gr 3 lOW Temperature Carbon Steel Pipes & Tubes, Exporters, Manufacturers, Stockists & Traders in Mumbai. ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service. This specification covers nominal (average) walled pipe almost exclusively in seamless. Several grades of ferritic steel are included.ASTM A333 Grade 3 Seamless Pipe - Alloy Pipe, Tubes ASTM A333 Grade 3 is the part of standard covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. ASTM A333 Grade 3 alloy pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.