MIG Welding Question

Well, that would depend upon other loads upon the structure, which clearly is not behaving as a pipe any more. If it were just supporting itself on-end, for example, then it may sit there under its own weight and wouldn't need welding at all.

• Suggestion 1: the undefined "we" hires a qualified Mechanical Engineer and that individual works from all the design information that is not listed in the original post; a set of first revision General Arrangement drawings for this watoosemedompfont, for example, would be a good first step.

The weld legs have to be a minimum of the wall thickness of the pipe.

It is not calculated, it is known by anyone knowledgeable in welding.

Which one is your joint configuration?

First

Second

Third

The one made with guano rods, obviously.

Like a pipe of 8000mm height 610mm in dia and 12.7mm thick being welded to a baseplate of 1176 dia and 60mm thick?

What u are aiming is to weld a 12.7 mm thick to 60 mm thick plate.

It is a fillet weld joint and thumb rule is for fillet joint is:

The fillet leg size shall be 0.75 times thinnest of the 2 dissimilar thicknesses.

a. In your case it could be (12.70 (x) 0.75 = 10 mm) i.e., 10 mm leg length on

either side of the materials to be joined.

b. If designed purposefully for dissimilar thicknesses welding, then 0.75 % of

thickness on either side (12.7 (x) 0.75 vs 60 (x) 0.75 i.e.,Fillet leg size will be

10 x 45 mm.

c. But pl. check your design symbols (for equal & unequal leg lengths) and weld

accordingly.

d. Use AWS SFA 5.1 E 7018 type electrodes (4.0 mm size) for the welding.

sridhar.

One correction pl.

Since you are using MIG process, use 1.2 mm size filler wire with recommended amps / voltage setting as per manufacturer's recommendation.

sorry for the lapse.

sridhar.

General rule of thumb (unless you are a qualified welding engineer and can calculate the joint configuration) is 1000 lbs per inch of weld per 1/16" of fillet is the weld strength using an ER480S6 wire with appropriate shielding gas. You will need to check the loads being applied and may have to prep the joint for enough weld strength as just increasing fillet size isn't always the answer. Fillet sizes rarely exceed the thickness of the thinnest material.

Look, if this baseplate is on the ground and the pipe has ANY structural load that is dynamicaly loaded then you need gusset plates to support the pipe.

Save yourself a court date and get a structural engineer to calculate the design.