Flashings 2 Credits 2 Periods Soldering tools and materials. Principles of roof ... None. IMC122 Piping Practices/Butt Weld Pipe Fabrication 1 Credit 1 Period Pipe ... material and their applications. Pipefitting butt weld pipe fabrication. ... plumbing fixtures. Calculating pipe diameter, structure and function of ... Prerequisites: None. IMC127 Socket Weld Pipe Fabrication 0.5 Credit 0.5 Period ... Socket weld pipe materials, fittings, interpreting ... piping drawings. Determining pipe lengths, fabrication methods, ... preparation of pipe for welding, specific layouts and ... adjustment and maintenance of pressure reduction valves. Prerequisites: None. IMC137 ... air balance. Air balancing procedures, tools and instruments. Prerequisites: None. ...