Model Taper Pipe Engagement

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FLtenwheeler
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Model Taper Pipe Engagement

Post by FLtenwheeler »

What is the correct engagement for model taper pipe threads?

I have heard some were around 6 threads for the fine thread fittings. What about 5/16”-27?

Thanks

Tim
He who dies with the most unfinished projects: Should of put more time into their hobby.
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Bill Shields
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Re: Model Taper Pipe Engagement

Post by Bill Shields »

More than enough

On 1/4-40 MTP you are lucky to get that many
Too many things going on to bother listing them.
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SPSteam2491
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Re: Model Taper Pipe Engagement

Post by SPSteam2491 »

For 1/16" NPT, it's going to be about 3/16" (or about 5 turns). But really you keep turning until it won't leak for your application.

It's going to vary based on pipe material, thread dope used, size, etc. The best way to get a better ballpark engagement length is to make some test pieces up with the thread dope you are going to use, assemble together and leak test (a rubber tip air nozzle works great for this).
Thanks
John LaFavor
Pacific Design Shops
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