Tig'n copper
Posted: Thu Oct 05, 2017 9:32 pm
I'm gonna be working up a PQR/WPS for staino pipe soon. Masking tape on the ends for purging takes time. I found that 2-1/2" OD copper tube (18#) slides over 2" pipe neat so I decided to make up some purge caps. (2" s/s sched 160 pipe will be my test coupons). Sliced some rings and flattened out some copper tube to make the caps. Decided to fuse them together with tig. Tried straight arc, bit like pelican poop. Tried pulse, bingo. Squeezed in the vice to remove gaps.
Settings:
DCEN
sharp 3/32" lanth, No.6 cup
10l/min argon
145amps on the pedal
2.5 pps
50% on time
50% background current
I mashed the pedal when cold to puddle then dropped back to a consistent 106 amps for the run.
Settings:
DCEN
sharp 3/32" lanth, No.6 cup
10l/min argon
145amps on the pedal
2.5 pps
50% on time
50% background current
I mashed the pedal when cold to puddle then dropped back to a consistent 106 amps for the run.
- Cap1.jpg (142.15 KiB) Viewed 731 times
- Cap2.jpg (104.83 KiB) Viewed 731 times
- cap3.jpg (89.75 KiB) Viewed 731 times
- cap4.jpg (133.13 KiB) Viewed 731 times