Audel Pipefitter's and Welder's Pocket ManualThis little book is big on answers Whether youre an apprentice in the piping trades or a seasoned tradesperson, youll find this completely revised and updated guide has answers to the questions youll encounter on the job. Get current, concise facts on Metrics and conversions Tungsten inert gas welding and arc welding Steam heating, hot water, refrigeration, and air conditioning systems Grooved end plain end piping systems Process piping using plastics