Allowable stress for A-523 Material

[T5580]

I'm searching the allowable stress at elevated temperature for ASTM designation A523. ASME II-D is not listed. I do found the Yield strength at room temperature. Any help to find this info is appreciated.
Regards,

 

[xhpipe]

What code are you working to????

Regards,
XHPIPE

 

[T5580]

xhpipe,
Thanks for the question. I don't know what code it should be used. This is a plain end seamless pipe for high-pressure pipe-type cable conduit. The material specification was initiated by the IEEE Insulated Conductor Commitee in recognition of the need for a specification embodying the special requirements of pipe for high-voltage electrical circuits. It is not a power piping. It is a pipe carrying the electric cable with oil content at high pressure approx. about 500 psig. I need the allowable stress regardless what code it is. Your suggestion is appreciated.

Regards,

 

[xhpipe]

Hmmm,

Well B31.3 offers you a methodology of developing a S value for a non-listed material. You could use this approach I suppose but the S value and code are married to each other and I'm still not sure what if any code is applicable to what your doing.

Using the B31.3 approach for something which might fall under the jurisdiction of another code is not correct.

So I still wonder whats the code??? Hmmmm

Regards,
XHPIPE

 

[xhpipe]

Cable Conduit??????

The materials listed by ASME have been deemed useful in pressure piping systems, pressure vessels, boilers etc.

To use a material which is rated as electrical conduit rather than pressure retaining material is not a wise idea that anuone would sanction (especially at 500PSIG),

Regards,
XHPIPE

 

[T5580]

xhpipe,
It Sounds odd, but that is what the client wants to use. You have mentioned B31.3 methedology of developing the allowable stress value for non-list material. Is it the same that ASME II-D Appendix 1 has offered? I guess I have to come up with something practically exceptable from the stress point of view. Please direct me to the B31.3 section as you mentioned.
Regards,

 

[xhpipe]

See 302.3.2 in B31.3

This can give you a design stress but I repeat the material itself may not be manufactured to a level that would allow it to be used as presssure pipe in other words a derived S value doesnt turn a sows ear into a silk purse.

Proceed cautiously.....

Regards,
XHPIPE

 

[T5580]

xhpipe,
Thanks for the info. It is the same as appears on ASME Sec II-D Appendix 1.
Regards,