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PRACTICAL PIPING COURSE - Engineer
B16.20 Ring Joint Gaskets and Grooves for Steel Pipe Flanges . B16.21 Nonmetallic Flat Gaskets for Pipe Flanges . B16.22 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings . B16.23 Cast Copper Alloy Solder Joint Drainage Fittings – DWV .
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