This is a lab objective that I completed as part of my AAS Degree in Welding Technology from Texas State Technical College - Waco.  Te objective was to weld a 6" pipe specimen per ASME code using GTAW (Gas Tungsten Arc Welding, a.k.a TIG welding) with four bend specimens.

Procedure Specification:

Material: 6" Standard Wall Pipe
Joint Type: Single V-Groove (60 degree included angle)
Backing: None
Root Opening: 5/32"
Root Face: 1/16"
Position: 5G Fixed
Progression: Upward Progression
Machine: Lincoln Invertec V350-PRO
Process: GTAW (TIG)
Polarity: DCEN
Amperage:
    -Root: 110 Amps
    -Hot Pass: 130 Amps
    -Fill & Cap: 130 Amps
Filler: 1/8" ER70S-6
Electrode: 3/32" EWTh-2
Shielding: 100% Ar 15-20 CFH

All this was done with scratch start and no amperage control (i.e. no foot pedal or finger amperage control).

Root pass:

 

 

Root pass closeup (pen for scale):


Inside of root pass:


Inside of root pass closeup (pen for scale):


Hot pass (the bead that comes right after the root):


I forgot to take a picture of the fill pass itself, but I did manage to get a picture of myself putting it in:


The cap (with bonus background action!):


Slightly closer shot:


Extreme closeup of cap:


With the actual welding done, it's time cut out four bend specimens (2 face bends and 2 root bends):

 

The specimens must have both the root and face reinforcement removed and have all edges rounded (after grinding I went over everything with a flap-wheel):


One specimen being bent:


All four specimens after being bent (notice no openings at all):


Closeup of one of the face bends (if you look real close you can see the weld):


Closeup of one of the root bends (if you look real close you can see the weld):