16Mo3 can directly welded with P22

[Alan-8899]

We have the equipment side the material is 16Mo3, but the connecting piping material is P22, who can share similar experience: Can these two materials be directly welded or not?

 

[0707]

I think you can but you have to take some precautions.
To be helped we need more data.

luis

 

For the Europhobic among us, what is 16Mo3?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[DekDee]

EN or SA/EN 10216–2 C–0.5Mo Smls. tube

 

[r6155]

You can see 16Mo3 in ASME IX.

Regards

 

[Alan-8899]

P22 the spec. no. is SA-335, P-NO. is 5A.
16Mo3 the sepc. no. is EN 10216-2, P-NO. is 3.

 

[Dhurjati Sen]

Alan, you need a mock-up piece, make a PQR & subsequent WPS. There is no short-cut.

DHURJATI SEN
Kolkata, India

 

[Alan-8899]

Thank you sir, i will ask out wleading team to check.

 

[david339933]

Check out QW-424.1 - WPS qualified on P5A to P5A qualifies P5A to P5A, P4, P3, P1.

 

r6155,
Sadly you are correct.
By incorporating EN standards into the B&PV Code, ASME are creating a Frankenstein. Same goes for AWS.

To answer the original question: both are steels, so 16Mo3 and P22 are eminently weldable. However, if PWHT is required (for either alloy), the hold temperatures are incompatible. My preference for filler metal is to match the lower alloy side (ER80S-D2, E7018-A1).

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[weldstan]

Are you welding 16Mo3 tubes to a P22 header? If so, are you welding the tubes onto the header or into the header? If 'onto', filler metals recommended by ironic metallurgist should be considered. I would recommend 'B3' type filler metals if the tubes are welded into the P22 header.

 

[0707]

the ironic made a good answer.

luis

 

[Alan-8899]

Sir, only the two pipes connected.

 

[XL83NL]

You’ve been given sound advice so far. Sufficient to do some research and homework. Which standards, codes of practice, guidelines - you name it - do you have at hand to consult and dig deeper into what could possibly be a sound answer per your last specific question?

Huub

 

[0707]

Alan-8899

But you also can use a P11 material which is between your two materials, because dilution of welding materials in the HAZ.

luis