The joint designation listed as B-L2c-S for SAW welding has 3 different base metal thickness listings. Next to the 3 listings it has max face listed as follows: Over 1/2 to 1" f = 1/4 Max  /  Over 1 to 1 1/2  f = 1/2 Max  /  Over 1 1/2 to 2  f= 5/8 Max.  My question about this is, Does this mean i can only weld material over 1/2" thick using this joint designation for the SAW process or are these thicknesses listed because of the three different Maximum face call outs? I have had one interpretation of this as unlimited thickness is ok because the material thickness is listed because of the required max face callouts of 1/4, 1/2 and 5/8.  I can't see any reason not to weld 1/2" thick material or less than 1/2" with this joint designation using the SAW process.  I think the different thicknesses are listed because of the max face requirements.

We use this joint designation to weld the bevel side first with GMAW process and then backgouge the second side and weld it up with the SAW process. We do this on 3/16" thick to 3/4" thick material and it works well. I have not seen anything that says i can't combine the 2 processes like this. Let me know what you think.