ASME code for welding of SS316L and Inconel 600 and SS316L and Hastelloy X 194

[SGHO]

I wish to fabricate a 10" vessel using seamless 10" pipe of Inconel 600 that will be welded at the bottom of 11" SS316L cylindrical rod. The pipe portion will be operated at 1000 K and SS316L portion will be attached to an enclosure from the top through a gasket type flange. It will have a cooling provision by winding copper coil around SS316L rod through which process water at 10 [sup]o[/sup]C will flow at 1.5 kg/cm[sup]2[/sup][sup][/sup] pressure. The welded portion will also experience sufficient stress at this temperature. What is the recommended filler wire to be used for such applications and what are the various tests that the weld has to pass through before the vessel is tested at high temperature. The vessel will experience at least 2 bar pressure at 1000 K, so what is the recommended hydro static pressure test that it should be subjected to at room temperature.

For a similar application, I wish to weld a 10" seamless pipe of Hastelloy X 194 with 11" SS316L cylindrical rod. This vessel will be operated at 1200 K, and the maximum vacuum that it should be subjected to is 0.01 mbar or less. What is the recommended filler wire to be used for welding of Hastelloy X 194 pipe and SS316L rod?

Which ASME code should I look into for getting an answer, and what are the hydrostatic pressure test requirements for qualifying the pressure vessels?

Thank you,

Sincerely,

 

[XL83NL]

A sketch would definitely help, but this sounds like an ASME VIII-1 application to me. Although Hastelloy x 194 may not be listed in IID, thus that would limit your options.
One of the API codes, RP 577, may help in selecting a suitable filler. Look at annex D, table D.3, for details. Please bear it’s a guideline, and ultimate filler metal selection is up to the engineer; the code can and does not cover all details to select the best filler metal for your application.

/edt; what’s the UNS number for hastelloy X 194?

 

[weldstan]

Use ER316L to weld 316L to itself.
There are a number of Nickel base alloy filler metals that may be used for the dissimilar metals joint. ER NiCrMo-3, ERNiCrFe-3 and others could be used depending on process conditions.

 

[XL83NL]

A reply from the OP would be much appreciated

 

[SGHO]

Thank you XL83NL,

The location at which SS316L monolith machined from the inside will be welded to Inconel 600 seamless pipe would see a slightly higher temperature than ambient although the SS316L portion will be cooled by copper coil wound around it with inlet water temperature of 14 [sup]o[/sup]C at a flow rate of 25LPM. The same case is when Hastelloy X 194 (UNS N06002) is welded to SS316L monolith machined accordingly from inside. I have included the specific details in the attachment, and I request you to provide details where ever I am not sure.

Sincerely yours,

SGHO

 

[DekDee]

All I can say is I am glad I never wasted a lot of time and money trying to qualify as a Welding Engineer.

 

[XL83NL]

Please please please provide a sketch. Your 2nd post is just as useful as the 1st.
Hast X 194 = UNS N06002
Use standard units. LPM probably means Litres Per Minute, but since you didnt define the abnormal unit, we dont know.