Stanley Motor Carriage Company - Wikipedia

In later models, the installation of a condenser caused oil-fouling in the expansion joints, and welded steel fire-tubes had to be used. The boilers were reasonably safe, since they were fitted with safety valves. Even if these failed, any dangerous over pressure would rupture one of the joints long before the boiler shell itself could burst.

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Deaerator - Wikipedia

Welding of the steel pressure vessels during the manufacturing process sometimes require Post weld heat treatment, XRAY, Dye Penetration, Ultrasonic, and other type non-destructive testing. ASME Boiler and Pressure Vessel Code, NACE International, and HEI (Heat Exchange Institute) have recommendations on the type of testing required.

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