Fluid conduits with selectively coated surfaces

A hammer union comprising:

• a first conduit section having a first conduit bore extending from a first end of the first conduit section to a second end of the first conduit section, the first conduit bore including a first beveled surface proximate the first end of the first conduit section and a first inner surface spaced from the first end of the first conduit section by the beveled surface, the first beveled surface and the first inner surface at least partially defining a first fluid passageway;
• a second conduit section having a second conduit bore extending from a first end of the second conduit section to a second end of the second conduit section, the second conduit bore including a second beveled surface proximate the first end of the second conduit section and a second inner surface spaced from the first end of the second conduit section by the second beveled surface, the second beveled surface and the second inner surface at least partially defining a second fluid passageway;
• a seal interposed between the first conduit section and the second conduit section when the first conduit section is coupled to the second conduit section to fluidly connect the first fluid passageway and the second fluid passageway;
• and
• a thermal coating applied to at least one of the first beveled surface and the second beveled surface.