Subheading 7306.29 · Section XV
7306.29 Iron or steel (excluding cast iron); casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73
73 Iron or steel articles
7306 Iron or steel (excluding cast iron); tubes, pipes and hollow profiles (not seamless), n.e.c. in chapter 73
7306.29 Casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73
Other subheadings under 7306
7306.11 Stainless; line pipe of a kind used for oil or gas pipelines n.e.c. in chapter 73, welded, (not seamless) 7306.19 Line pipe of a kind used for oil or gas pipelines (other than of stainless steel or seamless), n.e.c. in chapter 73 7306.21 Casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless) 7306.30 Tubes and pipes (not seamless), welded, of circular cross-section, n.e.c. in chapter 73 7306.40 Tubes, pipes and hollow profiles, welded, of circular cross-section, n.e.c. in chapter 73 7306.50 Tubes, pipes and hollow profiles (other than stainless steel or seamless), welded, of circular cross-section, n.e.c. in chapter 73 7306.61 Tubes, pipes and hollow profiles (not seamless), welded, of square or rectangular cross-section, n.e.c. in chapter 73 7306.69 Tubes, pipes and hollow profiles (not seamless), n.e.c. in chapter 73, welded, of non-circular cross-section (not square or rectangular cross-section) 7306.90 Tubes, pipes and hollow profiles (not seamless), n.e.c. in chapter 73
For Indian shipping bills you need 8 digits. These six-digit codes are the international HS 2022. India's ITC(HS) classification (DGFT) and Customs Tariff (CBIC) add two more digits for the national tariff line, so pick the 8-digit line under your 6-digit code there, and confirm with your customs broker for anything borderline.