What type of construction is recommended for openings in miniature boilers?

Miniature boilers, which typically operate at higher pressures in compact designs, require a construction method for openings that ensures a strong and reliable seal while accommodating the stresses of thermal expansion and pressure changes. Mechanical construction is favored for these applications because it typically involves the use of flanges, gaskets, and bolting to secure openings. This type of construction allows for flexibility during maintenance and repairs, as components can be easily disassembled and reassembled without compromising the integrity of the boiler.

Mechanical construction also provides the advantage of being able to withstand the dynamic forces associated with the boiler's operation, making it particularly suitable for the varying conditions found in miniature systems. Other construction types may not offer the same ease of maintenance or adaptability required for safety and efficiency in high-pressure environments.