Question on studs and their thread.

Are you trying to make your own Studs?

If so....

Why don't buy them?

No, I on the contrary do not wish to make. I am going to buy. But to the supplier of studs, except a nominal size of the stud, asks to specify - number of threads and thread form (series).

I know, there are alternatives of studs which are marked out as follows:

1 ½ - 6 UNC – 2A

1 ½ - 8 UN – 2A

1 ½ - 12 UNF – 2A

1 ½ - 16 UN – 2A

1 ½ - 18 UNEF – 2A

1 ½ - 20 UN – 2A

1 ½ - 28 UN – 2A

Where:

1 ½ - Nominal size

Numbers (6, 8, 12, 16, 18, 20, 28) – number of threads per in

UN, UNF, UNC, UNEF, - thread form and series

2A – Thread class

With the nominal size and a class to me all is clear. (According to the table 1C (page 12, ASME B16.5-2003)).

But here with parametres, number of threads and thread form, it is not clear. How to prove their choice.

In what paragraph ASME or the standard it is told about it?

Which alternative, according to ASME, is correct.

I am afraid it will turn out so.

I will order 1 ½ - 8 UN – 2A. And it agree ASME it incorrectly. It was necessary to order, for example 1 ½ - 6 UNC – 2A

I ask your help. What variant to choose?

For piping applications you should standardize and use common sizes and threads throughout your plant when ever possible.

Stud Bolt & Nut threads:

1" diameter and smaller = National Course (NC)

1-1/8" diameter and larger = 8 thread/inch

mageslay

Go with PennPiper (as usual). This is the norm for most Petrochemcial sites.

Try this. SA193 & ASTM 193 B7 Stud c/w A194 2H Heavy Hex Nuts

1-1/2-8 gives you a clamping Load P lbs 110,325 @ 3,076 FT. Lbs. (dry) or 2,303 FT. Lbs (lube)

This is a common stud and used in the Petro Industry.

Note: Don't ask me to tighten all those damn studs.

PennPiper

>>>>Stud Bolt & Nut threads:

1" diameter and smaller = National Course (NC)

1-1/8" diameter and larger = 8 thread/inch

Thanks!

And where in ASME it is written?