Can I use X22CrMoV12-1 bolting for ASME valve?

[UHoustonMSME]

We have traditionally used A193-B16 bolts for valves up to 1050F. Beyond 1050F we use INCONEL 625 or B446 bolts. This works fine but is really expensive.

EN 10269 permits use of the X22CrMoV12-1 (DIN 1.4923) bolts to 600 C (1100 F). This is a 12 chrome creep resistant steel, perhaps similar to ASTM 422.

Would this bolt material be permissible on an ASME rated valve?
Do I need to go to ASME for approval?
Does anyone in the forum have experience with this issue or this DIN material?

 

[metengr]

UHoustonMSME;
Is the valve itself under one of the ASME B&PV Code book Sections?

 

[UHoustonMSME]

No. The valves are typically rated to ASME B16.34. B16.34 para 6.4.1 specifies bolt area requirements and directs user to Sect VIII Div 1 or Sect III Div 1, Cl 2 or 3, for allowable stresses. Our interpretation is that we can not rate valve to B16.34 if we do not use ASME materials for bolting.

 

[metengr]

I reviewed ASME B16.34-2004, and you are correct if the bolts are for cover or bonnet applications.