Categories Pipes & Tubes SEAMLESS TUBING For the oil and gas industries, in accordance with API standards. OCTG as well as line pipe, Both prime and also non-prime. STRUCTURAL TUBING Rectangular, square and round for the construction (HSS) and ornamental industries. TUBING FOR FENCING APPLICATIONS Hot Dip Galvanized (ASTM A53 and ASTM A123 galvanized) Mill pre-galvanized (ASTM A653 with G60 or G90) Lacquered or painted in all popular sizes and lengths.