Announcement

Collapse
No announcement yet.

Can someone Explain Multi-passing?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Can someone Explain Multi-passing?

    can some one please explain multi-passing? maby how it is done! thanx
    D-dawgg
    Canadian eh!
    Canadian beer too strong for ya? Go to the USA! (no offence but american beer tastes like water compared to canadian)

  • #2
    thats when you have/need to make more than one bead down a joint to achieve the proper fill of the joint.

    Comment


    • #3
      I drew a quick thing It has the metal in black, weld pattern in red. It's just a real quick drawing I apoligize because it's rough.
      Attached Files
      Joe
      [email protected]

      Comment


      • #4
        (Each circle of red represents a pass) for those who didn't know.

        Comment


        • #5
          Nothing wrong with that SGT.

          Comment


          • #6
            Originally posted by wrench3047
            I drew a quick thing It has the metal in black, weld pattern in red. It's just a real quick drawing I apoligize because it's rough.
            that sure is a LOT of pass's

            Comment


            • #7
              21 is abut the proper number needed for 1" fillet or groove.......Patience is needed!!!!! Paul
              More Spark Today Pleasesigpic

              Comment


              • #8
                Originally posted by paulrbrown
                21 is abut the proper number needed for 1" fillet or groove.......Patience is needed!

                Wow paul that seems like a lot what rod you doing that with 3/32"???


                Gary
                Dry Creek Welding
                Dynasty 300DX Tigrunner
                Trailblazer 302
                Spectrum 2050
                suitcase 12RC

                Comment


                • #9
                  Originally posted by paulrbrown
                  21 is abut the proper number needed for 1" fillet or groove.......Patience is needed!!!!! Paul
                  Yeah, and think about NUKE piping, eh Paul
                  L*S

                  Comment


                  • #10
                    d-dawg,

                    Multi-pass technique is required when the thickness of your weldment is greater than your welder's single pass rating. The sequence of beads is important, as well as allowing the weldment to cool between passes, usually to at least 500°.
                    Beads should be run in sequence - the root pass will be the first bead. Successive beads should be run from one side of the joint to the othet IN SEQUENCE - bead 3 next to bead 2, then bead 4 on top of bead 2, bead 5 next to 4, etc., for as many repetitions as necessary.

                    Hope that made sense. It would be best if you went to the book store and picked up a copy of "Welding Essentials". It has a lot of good info for a beginer.

                    Hank
                    ...from the Gadget Garage
                    Millermatic 210 w/3035, BWE
                    Handler 210 w/DP3035
                    TA185TSW
                    Victor O/A "J" series, SuperRange

                    Comment


                    • #11
                      For out of Position welds, welders max capacity can be to great to control. those big bad rods don't like to go uphill and overhead....I find 1/8" to work well and for me are easier to control. Before I welded alot, I saw a piece of ships anchor chain that had been welded together, each link 220lbs,12"x30"x7', they said it took 24 hours nonstop welding, I did not believe them at the time, but after study and actual practice, I understood. The chain was 750' long, not easy to move about, they used 2 D11 Cat Doziers.
                      More Spark Today Pleasesigpic

                      Comment


                      • #12
                        /That should read[220lbs,12"x30"x7"] still alot of welding, Paul
                        More Spark Today Pleasesigpic

                        Comment

                        Working...
                        X