ASTM A333 Grade 6 welding

[Jay_]

Hey fellas,
i am new on here so bear with me,
The application that we have in our shop requires us to thicken the pipe wall in order for it not to be teared,
So in order for us to do that, we are going to weld a reinforcement on one end of the pipe,
The material of the reinforcement available here is the ASTM A335,
My question is: since the available material is of ferritic alloy steel, and the pipe material is of a low alloy steel, should i be worried about the welding of the two metals together? (cracks, corrosion... etc),
The electrode to be used is the E7018,
Thank you in advance,
Greetings gents,

Detailing is a hobby,

 

[LittleInch]

what code is this being built to / designed to/ welded to?

Normally there are lists of essential variables in which your welding procedure will cover or not as the case may be.

If you need a new WPS then you'll need a WPQT where these issues will present themselves.

I can't think corrosion would be an issue unless you've got a lot of water or electrolyte floating around and even then...



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[david339933]

A335 has many type/grades....P11,P21,P22,P5,P91 etc...which one are you referring?

 

[weldstan]

Why are you welding a high temp material like A335 (Grade??) to low temp steel (A333-6), which I assume is the pressure retaining item. Is the A-335 XX a pressure part? They can be welded together but you may well need preheating to avoid cracking in the low alloy HAZ depending on the grade and thickness. To what Code, if any is your design?

,

 

[Jay_]

Actually this is no pressurized pipeline and i should have probably mentioned that.
This is going to be used for drilling purposes, and the reinforcement i was talking about is just to strengthen the wall against mechanical dynamic stress and not stress induced by a pressurized fluid passing through the pipe line.
I mean the pipe wall’s thickness is 12.7mm.
The client’s requirement is to put kinda like a cylindrical reiforcement at one end of the pipe just to get almost 25mm thickness. The cylindrical reiforcemnt has has a inner diameter just like the outer diameter of the pipe and an outer diameter of (pipe outer diameter+reinforcement thickness*2)and a height of 400mm, so basically the pipe is going to be 400mm inside of the reinforcement
The welding against the original pipe is going to be a lap welding (flat), the client doesn’t mind the material of the sleeve ( the reiforcement) but i was just looking around and asking some suppliers here and ASTM A333 wasn’t found. However the ASTM A335 is available, the welding is going to be as per AWS d1.1.
Im thinking of choosing a low alloy steel for a reinforcement such as S235 or S275 or even S355, is there any advice anyone would care to mention?
Anything would be highly appreciated!
Best of regards!


Detailing is a hobby,