MCC-NH Gas Fitters Practice Exam

Which methods of connection are permitted for steel pipe?

1. Screwing and soldering

2. Flanges, Welding, Brazing, Press Connect

3. Only welding

4. Only bolting

The correct answer is: Flanges, Welding, Brazing, Press Connect

For steel pipe connections, the use of flanges, welding, brazing, and press connections is standard practice. These methods are favored because they provide strong, reliable joints that can withstand various pressures and temperatures typical in gas fitting applications. Welding is a particularly robust method of connection, creating permanent joints that are often resistant to leaks. Brazing is also effective, as it allows for the joining of metals using a filler material, ensuring a durable bond. Flanged connections enhance maintenance and repair capabilities since flanges can be easily bolted together and disassembled. Press connections offer another modern, efficient method for joining pipes without the need for heat, making them attractive for many installations. While other connection methods, such as screwing and soldering, may be seen in other applications, they are not as reliable for the high-stress demands often found in gas fitting work. Similarly, bolting alone may not provide sufficient strength for gas applications, where a permanent and leak-proof connection is crucial. Thus, the inclusion of a variety of strong connection methods makes option B the most comprehensive and correct choice.