What type of fittings can be brazed in gas installations?

In gas installations, brazed fittings are typically used due to their ability to provide strong, rigid joints that can withstand the pressure and temperature changes associated with gas systems. Brazing involves joining metals using a filler metal, which melts at a higher temperature than solder but lower than that of the base metals.

Concealed fittings are specifically designed to be installed within walls or other hidden areas, and their use in gas installations requires careful consideration of sealing and reliability. Brazing offers better structural integrity and a more durable joint in these scenarios than other methods, making it suitable for concealed installations where access is limited and where preventing leaks is critical.

Other types of fittings, such as screwed and exposed fittings, are generally joined using threaded connections, while plastic fittings are not suitable for gas applications because they cannot handle the temperatures and pressures that gas systems may experience. Thus, concealed fittings are the more appropriate choice when it comes to using brazed connections in gas installations.