[AT] Russian Metric uses BSPP

[Dennis Johnson]

Work I have done in Russia and China commonly uses BSPP threads for pipe. They are a real pain to get to seal. I developed a strong hatred of them.
Recently I purchased a small “stock tank” from Tractor Supply to use for cooling drinks with ice at a wedding. The drain on it was BSPP. We screwed in a male NPT thread and a valve and it held without significant leakage.

Dennis


Sent from my iPad

> On May 12, 2019, at 6:44 PM, James Peck <jamesgpeck at hotmail.com> wrote:
> 
> Automation Direct sells low price electrical components. I recently saw BSP threaded conduit connectors and cord grips offered for sale in the US. I do not like this. 
> 
> 6 types of hydraulic threads
> https://www.parker.com/literature/Tube%20Fittings%20Division/Four-Easy-Steps-to-Identifying-Hydraulic-Treads.pdf
> 
> SAE inch straight threads
> NPT inch tapered thread
> 
> BSPP British inch straight thread
> BSPT British inch tapered threads
> 
> Metric straight thread
> Metric tapered threads
> 
> Tapered fittings seal by thread interference. Straight threads seal by the o ring.
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