Materials substitution

[ChrisOverh2o]

I have a requirement for a Siemens build (compressor piping) where they have indicated SA515 Gr 70 for a gusset detail on a small bore nozzle of SA 106B materials. I understand SA515 is coarse grain structure and SA516 is a finer grain structure. SA 515 may give slightly higher toughness at elevated temperatures, but the op temp of this unit will not exceed 130C. I have to build and register these fittings with ABSA, does anyone think that I will have an issue substituting the more readily available SA 516 GR 70 materials?

 

[weldstan]

At the design conditions there is no difference between the two nd the SA-516 will be tougher at startup temps.

 

[ChrisOverh2o]

THanks weldstan, that was my understanding as well, I am just not a metallurgis or materials engineer so i was drawing my conclusion from ASME code

 

[ChrisOverh2o]

Okay, I have a new challenge, I have to calculate the stored energy in KJ for pneumatic testing. My max allowable is 1677 KJ, I have 27 meters of 36" pipe, and testing to 700 kPa, can someone help me with the ABSA calc? Or direct me to an online location where I can input the numbers, test will be using standard compressed air.

 

[EdStainless]

what is wrong with Google?

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

 

[ChrisOverh2o]

Yep, did that right after i posted, i apologize for wasting peoples time, have the calculation done already, thanks.