What is the assembly method for sections of a cast iron boiler?

The assembly method for sections of a cast iron boiler primarily involves the use of push nipples and bolts. This method is favored because push nipples facilitate the connection between the boiler sections, allowing for a tight seal that helps prevent leaks of steam or water.

The design includes these push nipples, which are typically made of materials like rubber or a type of metal designed to withstand the conditions within a boiler. When combined with bolts, which reinforce the connection, this assembly creates a robust structure capable of handling the pressures and temperatures typical of boiler operations.

Other assembly methods such as welding and bolting may not be suitable for cast iron due to the properties of the material, which can become brittle when welded. Clamps and screws are often used in less critical applications where a less permanent connection is acceptable, and interlocking sections may not provide the same level of sealing efficiency required for high-pressure steam applications. Therefore, the use of push nipples and bolts remains the standard for ensuring both safety and efficiency in cast iron boiler assembly.