Complete joint penetration

[200782]

Hello,

I need to make a baseplate for a machine, but my customer is requesting me complete penetration joints as part of the requirments.

my concer is the plate thikness (32mm), I am not sure if it is allowable to do such a job on this kind of material.

in other hand I have a perpendicular union (T) and I do not know how to prepare the material.

 

[gr2vessels]

200782,
There is pressure equipment made of 200 mm and thicker plate, welded full penetration as per the code requirements. 32 mm plate is not categorized as special material;- it however, depends on the material (I only assume that you are using carbon steel material). It is also true that welding full pen 32 mm plate requires considerable effort/costs and no additional gain, compared with a partial penetration, if no corrosion problems are present. Also, if the T union seems to be in the other hand, perhaps you could change hands. As for plate's welding preparation, you could make a double V (V on both sides) and weld slowly, low heat input in the root weld, then blast it with FCAW.
cheers,
gr2vessels

 

[Dinosaur]

Unless there are access problems for the welder, there is no reason you cannot have them fabricate a full pen weld. The shop will just have to bevel one plate edge and then perform a multi-pass weld. There are also double bevel details for full pen welding if they wish. If your client knows enough to want a full pen weld, ask them if they want it to be ultrasonically tested as well. Good Luck.