3 run 2 layer eaisest yet hardest weld to achieve?

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how's it going guy, Now everyone can do a 3 run 2 layer fillet weld, but not everyone canachieve full penitration, i can do the nicest looking 3run2layer but sometimes i get nopenitration at all, does anyone have any tip's to get peno first time everytime,some people have told me to pre heat my gun i hold at 45 degrees with a slight slaint to push the weld pool, im am going for my 8g pressure ticket so i need to get this right, my v-up is perfect my rotating pipe is perfect horziontal is perfect but this damn 3run2 layer lol, any tips would be appreciated
Reply:In my limited experience, I've just about given up on a 3 pass built up weld.The last pass has to be pretty wide, and you have to pile it up against the vert piece of steel.  It winds up requiring a pretty wide pass with a high angle, or a weave to put heat into both toes.Point that sucker up high, and come down on a side to side weave to fill in the gap.Or better yet..........do it in four passes (which I know you can't do for the test).  Two on the "floor", fill in between the two, then build the last pass between the third pass and the vert steel.  It makes for a tighter, more focused, hotter bead.but if ya gotta do it, make sure you get heat in both toes.  Aim as you move the gun up and down as you proceed"Any day above ground is a good day"http://www.farmersamm.com/
Reply:gun is almost pointed straigt at the vertical steel, and you move it up and down to place the heat in both toes, but always keep it pointed almost straight at the vert steel"Any day above ground is a good day"http://www.farmersamm.com/
Reply:I suppose it could be put this wayyou need penetration on the vert plate, and fusion on the previous passes.  the real heat needs to be on the vert"Any day above ground is a good day"http://www.farmersamm.com/