Tensile strength of thread connection 1

[Hanson Gill_1983]

Hello,

Please can someone tell me how to find the tensile strength or tensile rating in lbf of the connections below.

3-1/2" TUBING 12.95 PPF, TENARIS HYDRIL 533 connection
3-1/2" TUBING 15.8 PPF, NKEL connection
3-1/2" TUBING 12.7 PPF, JFE BEAR connection

Is it tensile strength in psi x area of the thread section?

Any formulas or guidance would help.Thanks

 

[MJCronin]

Make five of each type and go to a materials test lab.

Break all five in tension and take the average figure.

Suggest that you use 20 to 40% of this average in design.

I don't know why you would want to do this ..... It is not required by any of the piping codes that I am aware of ...but,

I am assuming that the Client's 20-something newbie engineer thought it might be a great idea ....

I assume that you are interested in testing these joints in the non-pressurized conditions... Right ?


MJCronin
Sr. Process Engineer

 

[EdStainless]

Don't these joints have load ratings?
Of course the rating for these would be axial load along with an internal pressure.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[LittleInch]

How to find out?

1) Look up the website of each of these bespoke connectors
2) If it doesn't tell you find a human on the contact us page
3) Buy three of each and then pull them apart as MJC says.

There is no formula AFAIK.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MJCronin]

Five of each .....

MJCronin
Sr. Process Engineer

 

[blacksmith37]

Can't guess without pipe grade ; at least L-80 or you would not be using proprietary connections , but maybe Q 125 or even V 150. That is ;minimum yield between 80,000 and 150,000 psi.

 

[chicopee]

Manufacturer's catalog or supplier's data sheets would be a good starting point.