Galvanized pipe threading

[Anonymous]

Hello:

I am designing a device to be screwed onto a 1 inch diameter threaded galvanized pipe. 

The galvanized pipe threading is 1 inch in length but the diameter of the threading starts out one size
and then increases in size as it ends at the pipe.  

Because of the increase in thread diameter, I can only get my device screwed onto the pipe about 1/4 of an inch.

How do I design the threading so it accommodates the increase threading diameters so that 

the device I am screwing onto the 1 inch galvanized threaded pipe uses the whole 1 inch thread? 

Thank you.

Tom 

[g-andresen · Accepted solution]

Hi,

Could it be that you are looking for an NPT (conical thread)?
You should find NPT in the thread lists.

günther

[Anonymous · Accepted solution]

Hello Gunther:

Thanks for responding.

I am using ISO Pipe Threads.

There is no NPT option.

The options are:

BSP

DIN

GB

ISO

Tom 

[g-andresen · Accepted solution]

Hi,

Are there no conical threads here?

günther

[Anonymous]

Gunther:

I did as you suggested and it did not work.

The printed device only screws onto the galvanized pipe about 1/2 inch.  I need it to screw onto a 1 1/2" threaded area. I need to be able to adjust the width but The system sets up the diameter of the threaded area and does not allow me to adjust it. 

What am I not doing right?

Tom 

I 

[TheCADWhisperer]

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[Anonymous · Accepted solution]

Gunther:

It worked!

After conducting numerous test prints, the device was able to be screwed onto the pipe as needed.

Now the complete design is being printed and hopefully all is as needed.

Thank you very much for your advice. I could not have done it without you.

Tom 

[g-andresen · Accepted solution]

Hi,

Please mark contributions which have led to a solution as accepted solution.
This will help future readers to find their way around.

günther