Threaded Coupling 2

[mechbadem]

Hello everybody,

Even though I have checked the ASME B16.11 i could not understand the pressure rating in bars for Class 3000 SA 105 threaded coupling.

Can you help me?

 

[GenB]

You may find tables for pressure and temperature for several classes of materials. but you still need tocalculate, 3000 is just a nominal name. B16 has metric tables too.

 

[XL83NL]

You have to insert the respective wall thickness, matching the Class rating you picked, into your Code of Construction.

 

[sharmass]

Couplings need to be designed considering them as equivalent pipe size. (Refer UG-44)
3000 class threaded couplings are considered as equivalent to Schedule 160 pipe
6000 class are equivalent to Schedule XXS (See table 7 in B 16.11)
Material for stress values can be considered as coupling material (e.g. SA-105 and NOT SA-106)

Pipe tolerance + corrosion allowance + threading allowance must be considered (Refer 2.1.1 of B16.11)