How should all openings in a miniature boiler be constructed?

In the construction of a miniature boiler, all openings must be designed to ensure they can withstand the pressures and temperatures involved during operation. The correct approach is to utilize mechanical construction methods that provide both strength and reliability.

Mechanical constructions such as threaded connections or welded joints can accommodate the necessary stress and thermal expansion that occur in high-pressure environments. The requirement for a minimum of four threads ensures that the connection is secure and distributes the pressure adequately, reducing the risk of failure. Additionally, welding is also permissible as it creates a strong, permanent joint that is well-suited for high-pressure applications.

The use of adhesives or solely relying on threaded connections without considering their ability to handle pressure may lead to potential failures or leaks. Hence, the combination of mechanical construction with stringent threading requirements or welding offers the best solution for maintaining the structural integrity of miniature boilers.