Looking for a trusted heat exchanger seamless tubes maker in China? Look no further! We specialize in manufacturing ASTM A179 and ASME SA179 carbon steel tubes with exceptional quality. Our tubes have an outer diameter of 38.1 mm (1-1/2 inches), DN40, and a thickness of 2.11 mm. With a length of 7315 mm, our seamless tubes are perfect for heat exchange applications. Contact us now for reliable and efficient solutions.