Friday, January 28, 2022

Building Code for Duct Pipe Screws! Imperial Stove Pipe screws heads pop off! Be careful

2012 IRC

M1502.4.2 Duct installation.

Exhaust ducts shall be supported at intervals not to exceed 12 feet (3658 mm) and shall be secured in place. The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Exhaust duct joints shall be sealed in accordance with Section M1601.4.1 and shall be mechanically fastened. Ducts shall not be joined with screws or similar fasteners that protrude more than 1/8 inch (3.2 mm) into the inside of the duct.

https://www.thebuildingcodeforum.com/forum/threads/dryer-duct-joint-connection-methods.10586/page-3 

I was staring at stainless steel self-tapping sheet metal screws - what size to buy? I bought 1 inch. TOO long!!

Who knew there was CODE against that? haha.

Good thing I searched it out.

https://codes.iccsafe.org/content/IRC2018/chapter-16-duct-systems#IRC2018_Pt05_Ch16_SecM1601.4.1 

so you can't cut and paste quotes.

Says the two duct pipes need one inch of overlap - at minimum!!

I'm probably going to wait to install the stainless steel duct pipe. I'm gonna put the worm clamps around the duct pipe already installed - as a safety measure increase the increased temperature and pressure causes it to explode.

The aluminum heat exchanger stripes will cool down the duct pipe by at least 100 degrees Fahrenheit - so should be safe.

I will use the infrared gun to check the temperature and the change.

Then I'll get a stainless steel elbow - since that will get the most heat - and will keep it from rusting out. So in the Spring I will install a new "rust-free" duct pipe system.

At least for most of it.

I LOOKED for stovepipe crews - I thought they were stocked at one of the local DIY stores. I went to two of the DIY big box stores. NOPE.

Maybe they're at the third one.

OK the Imperial Stove Pipe screws got bad reviews - said the Heads popped off!!  (Made in China)...

So what other Stove Pipe screw brands are there?

Meeco.

Gets decent reviews.

OH the Big Box local was selling Imperial anyway - good thing I didn't buy those.

I'll just get Hex Washer Head number 8 self-tapping Stainless Steel sheet metal screws 1/2 inch



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