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The what I welded today (/whenever) thread (pics please)
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Coldman
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Had to chop out a couple of 3" refrigeration ammonia stop valves and replace with stop/check valves.
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The replacement valves were shorter in both dimensions so the first job was to weld on pups.
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Left hand valve welded in.
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Setting right hand valve in position and adjusting gap.
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All welded out.
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Flat out like a lizard drinkin'
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Poland308
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Nice job on the valves.
I have more questions than answers

Josh
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I'm not a big fan of heat tint colors, but sometimes those are fun to watch :D

316L 21,3x1,6 mm pipe.
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-Markus-
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Cold man, What must one do before welding on a system that has contained ammonia?

Mick
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Rick_H
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Nice Markus was that machine or hand?
I weld stainless, stainless and more stainless...Food Industry, sanitary process piping, vessels, whatever is needed, I like to make stuff.
ASME IX, AWS 17.1, D1.1
Instagram #RNHFAB
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Coldman
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If welding on a vessel we purge for 10min with nitrogen. If pipework first we pump it down to a bit of vacuum then break with air and get into it. If there is oil present (often) it will have disolved ammonia which gases out into the weld and welder. This is where inexperienced welders put on their skirts and run away screeming. I've been sucking it for 35 years as a fridgy and since I've been welding I get calls from all over for crap jobs nobody wants to touch. Is this a niche? Anyway you don't want ammonia in your welds. This happens when valves don't hold - it happens. The arc and gas shield glows green like the hulk, the tungsten starts to disappear and you get severe porosity in your weld. Alot of cursing happens about this time. To seal off a butt we weld a socket on the pipe upstream from the joint to let pressure and flow out while we complete the butt and then screw a plug or valve into the socket.
I watched a mate of mine weld a 12" leg into the underside of a horizontal vessel with oil and ammonia running out through the joint. He used 5p for root and 7016 out. That joint got xray ultrasonic and mag particle and passed all. Awesome job. Gobsmacked.
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Rick_H wrote:Nice Markus was that machine or hand?
Thanks Rick. That one was hand welded this time. 2mm is much harder to get same colors due to heat.
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Starting a new batch of frames.
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Love your work, Zank.



Kym
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Thanks coldy. If my current job goes tits up (possible) im heading straight to our local Refrigeration company, that does welded systems.

Mick
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Coldman
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That would be gbi?
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MosquitoMoto wrote:Love your work, Zank.



Kym
Thanks, Kym!
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KYNgsx

Welcome to the Forum

Tell us a bit about yourself in Member Introductions if you like.

Neat work too!

Trev
EWM Phonenix 355 Pulse MIG set mainly for Aluminum, CIGWeld 300Amp AC/DC TIG, TRANSMIG S3C 300 Amp MIG, etc, etc
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Last ones for this week.
Image
Chip B by Mike Zanconato, on Flickr

Image
Chip B by Mike Zanconato, on Flickr

Image
Chip B by Mike Zanconato, on Flickr
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I am crying in my cups!
Everlast 250EX
Miller 250 syncrowave
Sharp LMV Vertical Mill
Takisawa TSL-800-D Lathe
Coupla Bandsaws,Grinders,surface grinder,tool/cutter grinder
and more stuff than I deserve(Thanks Significant Other)
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zank wrote:Last ones for this week.
Image
Chip B by Mike Zanconato, on Flickr

Image
Chip B by Mike Zanconato, on Flickr

Image
Chip B by Mike Zanconato, on Flickr
Pure weldporn.


Kym
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Nice work, as usual, Zank!

Nothing special here... I am trying out a new camera. It's a bit of a cheapie, but it doesn't have 30 features I'll never use.

Just some basic pipe fab. First pic in standard mode, second in "macro" for close-ups. We'll see how they come through on the forum.

Steve S
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Poland308
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are those some sort of vac regulators?
I have more questions than answers

Josh
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They're pressure relief valves (safeties) on a liquid Hydrogen trailer.

Len
Now go melt something.
Instagram @lenny_gforce

Len
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Poland308
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Like on a semi trailer or a skid for set up somewhere?
I have more questions than answers

Josh
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Semi trailer, but they're also used on the stationary tanks that they deliver to.

Len
Now go melt something.
Instagram @lenny_gforce

Len
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Rick_H
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The temps like to steal the sanitation tooling we have at the lines so I fabbed up a lockable holder..of course in stainless.
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IMG_20150917_214607803.jpg
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Last edited by Rick_H on Sat Sep 19, 2015 11:18 pm, edited 1 time in total.
I weld stainless, stainless and more stainless...Food Industry, sanitary process piping, vessels, whatever is needed, I like to make stuff.
ASME IX, AWS 17.1, D1.1
Instagram #RNHFAB
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Good one Rick. Does the job nicely!
EWM Phonenix 355 Pulse MIG set mainly for Aluminum, CIGWeld 300Amp AC/DC TIG, TRANSMIG S3C 300 Amp MIG, etc, etc
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Poland308 wrote:Like on a semi trailer or a skid for set up somewhere?
Semi trailer.

I knew Len would recognize them...

Steve S
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Poland308
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Cool always like to learn a little more.
I have more questions than answers

Josh
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