the article is titled “galvanized pipe should not be used in dry pipe sprinkler systems” and discusses the high rate of galvanized pipe failures in the sprinkler industry. in theory, use of galvanized steel piping in dry pipe fire sprinkler system applications makes sense. galvanized steel pipe is not more corrosion-resistant than black steel piping under normal use conditions in dry and preaction fire sprinkler applications.
dry pipe fire sprinkler systems almost always contain water from multiple sources: because of the highly localized nature of corrosion attack in galvanized steel piping, through‐the‐wall penetrations occur faster in galvanized steel corrosion than black steel exposed to the same conditions. galvanized steel piping subjected to the corrosive conditions typically found in dry and preaction fire sprinkler systems produces discharge water that may be high in zinc levels. the use of galvanized steel piping within the fire sprinkler industry is a complete misapplication of the construction material. the dry conditions inside the piping that must exist in order for galvanized steel piping to be effective against oxygen corrosion are also ideal for the use of black steel piping.
so, to answer your question, nitrogen and black pipe is the way to go. if you still specify galvanized pipe, or see it specified, this paper would be very much worth your time: /hubfs/ecs_august2018/pdf/white-paper-six-reasons-why-galvanized-steel-piping-should-not-be-used-in-dry-and-preaction-fire-sprinkler-systems.pdf it’s not that galvanized pipe doesn’t protect the pipe – it does – but it also forces all of the corrosion to happen at the weakest point in the system and not across the entire system. the projected life for schedule 10 galvanized steel pipe can be increased from 10 (compressed air) to 150+ years with 98% nitrogen in a perfect scenario. ** all owners will pay a premium for the galvanized sch 40 and nitrogen systems up front obviously.
before moving to the south, i used black steel and compressed air for 10 years for all the dry systems my company installed in los angeles. if i were a building owner that expected to own the building more than 5 to 10 years, i would opt for nitrogen and black sch. we identified a systemic problem with galvanized pipe and after researching the issue found that galvanized pipe was much more susceptible to corrosion in persistently moist (or wet) environments. if the answer is longer than 10 years i would recommend nitrogen with black steel every time. and replacing system in a nursing home attic or data center is not cheap.
ideal for branch line use in wet, dry, pre-action and deluge systems, wheatland’s gl fire sprinkler pipe has a galvanized exterior and is comparable to the galvanized steel performs very poorly in dry and preaction fire sprinkler systems when there are pools of trapped water standing within the the following discussion presents the primary reasons galvanized steel piping should not be used in fire sprinkler piping., fire sprinkler pipe for sale, fire sprinkler pipe for sale, fire sprinkler pipe price, commercial fire sprinkler pipe, fire sprinkler pipe suppliers.
to combat corrosion, fire sprinkler systems utilize either galvanized steel or black steel for pipes, as each type of steel has corrosion use internally galvanized, stainless steel, or similar corrosion-resistant pipe in all new dry-pipe, pre-action, refrigerated-area, deluge, and exposure- it’s not that galvanized pipe doesn’t protect the pipe – it does – but it also forces all of the corrosion to happen at the weakest point in the, fire sprinkler black pipe, fire sprinkler pipe diameter, fire sprinkler pipe supply near me, schedule 40 sprinkler pipe, fire sprinkler pipe size chart, stainless steel fire sprinkler pipe, xl fire sprinkler pipe, fire sprinkler pipe material, fire sprinkler pipe fittings, orange fire sprinkler pipe.
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