Marine engineering

A519 seamless tubing is commonly used in applications requiring machining, heat treating, close tolerances, smooth finishes, and/or definite physical properties.

A finned tube is a kind of heat exchange element. It is a kind of heat exchanger tube to improve the heat transfer efficiency, usually by adding fins on the surface of the heat exchanger tube to increase the external surface area (or internal surface area) of the heat exchanger tube, so as to achieve the purpose of improving the heat transfer efficiency.

ASTM A335 is the standard specification for seamless ferritic alloy steel pipe for high temperature applications. Different grades (P1, P2, P5, P9, etc.) represent different alloy compositions.

ASME SA213M / SA213 T9 is the standard applicable to Seamless Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.