Shell-and-Tube Heat Exchanger · Heat Exchangers
The Basco Type 500 from API Heat Transfer is a shell and tube heat exchanger of standard design that can be customized for specific needs, sold as Commercial Standard, ASME or ASME with TEMA-C units. The maker names marine applications in a list that also covers compressor systems, hydraulic systems, stationary engines, turbines and lube oil consoles. Straight-tube and U-tube bundles are offered, removable or non-removable, in one-, two- and four-pass designs. Standard design pressure is 300 PSI on the shell side and 150 PSI on the tube side, while TEMA-C and ASME units are rated 150 PSI on the shell side as well.
Design temperature is 300 degrees F, and stainless construction allows more. All units are pneumatically or hydrostatically tested. Shells are carbon steel or stainless steel. Tubes can be copper, admiralty, 90/10 CuNi, stainless steel, carbon steel or titanium. Tubesheets can be 90/10 CuNi, stainless steel or carbon steel, and they are welded to the shell with precision-drilled holes. Bonnets are available in cast iron, cast bronze, 304/316 stainless or carbon steel, and baffles in carbon steel, brass or 304/316 stainless. Zinc anodes can be supplied on special order. Commercial Standard models run from 3 to 8 in. in diameter, with a steel pipe or tubing shell and cast iron bonnets.
The stainless range uses a welded 304 stainless shell with 304 stainless tubes, and fixed bundle versions can also be had. ASME and TEMA-C models cover 5 to 12 in. in diameter, with a carbon steel shell and carbon steel or cast ductile iron bonnets. Connection sizes of 3 in., 4 in., 5 in., 6 in. and 8 in. are offered, either threaded or flanged, and others can be added. The catalogue asks for a weight check when the unit is not mounted horizontally with brackets underneath. For sizing, the catalogue advises tube side velocity between 2 and 6 feet per second and not above 8 feet per second.
Sources: API Heat Transfer datasheet Basco Type 500, checked 05.10.2026
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