2018 International Existing Building Code (International Code Council Series) 1st Edition

2018 International Existing Building Code (International Code Council Series) 1st Edition

This code gives the main rules for making sure fuel gas systems and gas-powered appliances are designed and installed safely. It uses both specific rules and general performance standards. One big change is a new section that includes arc-resistant CSST products. The code also allows the use of Schedule 10 steel pipe, which was not allowed before—previously, only heavier Schedule 40 pipe could be used. Although Schedule 10 pipe can be joined by welding, brazing, flanged connections, or press-fit fittings, it can’t be connected with threaded fittings.

There are also several other changes and improvements for safety.
Now, appliance shutoff valves that are behind things like ranges and dryers are officially considered to be accessible. Plastic vent pipes must be labeled according to the standards set by the manufacturer, and UL1738 is still an acceptable alternative. Also, the spaces between direct-vent appliance vents and openings on the outside of buildings have been updated to help prevent harmful gases from getting inside, making installation safer overall.

The code covers how to design and install fuel gas systems and gas appliances using specific rules and performance-based standards.

Key changes include adding a new section to recognize arc-resistant CSST products. The code now allows the use of Schedule 10 steel pipe, which previously wasn’t permitted—only Schedule 40 steel pipe was allowed. Schedule 10 steel pipe can be joined using welding, brazing, flanged fittings, or press-fit connections, but it can’t be threaded. The code now clearly states that appliance shutoff valves behind moveable appliances like ranges and dryers are considered accessible.

Plastic vent pipes must be labeled to show they meet the manufacturer’s standards, and UL1738 can still be used as an alternative. The clearances between direct-vent appliance vents and openings in the building that could let combustion gases in have been updated.

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