HUTCHINSON, Kan. — Superior Boiler has completed its 20,000th registered National Board boiler. “This is a major milestone in our company’s more than 100-year history,” said Doug Wright, president and ...
The National Board of Boiler and Pressure Vessels is so good at registering items, it has done so more than 63 million times since 1921. Figure 1. While time has enhanced the basic principles of ...
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