Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 06 Other tubes, pipes and hollow profiles of iron or steel, welded, nes 73 06 30 High-pressure pipe capable of withstanding a pressure of not less than 42,000 psi : 73 06 30 40 High-pressure pipe capable of withstanding a pressure of not less than 42,000 psi : Commodity Code Description 73 06 30 40 00