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  1. capntom62

    Welding code for euro waste water systems?

    Is there a European code (ISO or EN) for welding standards for waste water pump systems? How you qualify welders ? Qualify joints ? Quality standards? I know there is ISO 9606 which defines how a welder is qualified, but how about specifically within the application? We are an OEM. Similar...
  2. capntom62

    N95 masks for welding ?

    HR just mentioned to me that our TIG welders should be wearing N95 masks when welding 304 / 316 SS. In all of my 40 yrs of welding I have never heard of this. I have had air quality testing performed to make sure ventilation systems ae working, but never under a helmet. I have used positive...
  3. capntom62

    Finishing a 304 SS welded assembly

    The assemblies can be quite large, 4' foot cube and weigh 2,000 lbs. A cabinet would be large, with cranes or hoists to move parts around, ventilation system constraints, labor hours to blast. We had one blasted in our parking lot months ago and it took about 4 hrs. I have designed and built...
  4. capntom62

    Finishing a 304 SS welded assembly

    We are leaning towards a portable buffing process. Lots of great responses, and some good questions. "What do they want?" As "mfgenggear" states, non technical people do not know what they are looking at and favor the prettier products. Blasting, electropolishing or coatings cost too much...
  5. capntom62

    Finishing a 304 SS welded assembly

    I am not sure if you are asking that question or making a statement. The details of the assembly would prohibit that level of uniformity. Some details are cast, extruded or rolled and welded pipe. They just need to look professionally made to a non technical person.
  6. capntom62

    Finishing a 304 SS welded assembly

    We make waste water pumps from welded commercial pipe fittings. Marketing is asking us to make them "prettier". We currently wire brush and passivate the welds. Electropolishing will be very expensive because of the sizes. Ø 8-12" Dia pipe fitting assemblies can weigh over 1,000 lbs and be...
  7. capntom62

    Basic Welding Knowledge For Engineers

    I work with a lot of younger Engineers and you are not alone. Unfortunately, the knowledge to "join" pieces of metal together ranges from the DIY'r with a Harbor Freight welder in his garage to the Aerospace or Navy Nuclear welder. The knowledge and experience is never given enough credit...
  8. capntom62

    WPS requirement for Amperage for NADCAP

    We are an Aerospace Company updating our PQR / WPS format for documenting the welding current on Aluminum. We use Miller Dynasty 400 machines for Manual GTAW. We will be going for NADCAP accreditation soon and would like to glide thru worry free. What is the preferred method for documenting...
  9. capntom62

    Cool Gel to minimize distortion ?

    In the Aerospace industry some of our Mfg. Engineers talk about using "cool gel" type of products to minimize distortion during welding. Has anybody used it and had success with it ? I have only used copper bars on flat surfaces as heat sinks.
  10. capntom62

    Weld test coupon fixture design for GTAW in Aluminum

    I was looking for more of what the practical shops due. AWS D17 does not cover fixture design.
  11. capntom62

    What is square groove?

    A square groove is defined as the edge prep on a Butt joint. Basically, square corners with no angles. Process and Group have a lot to do with the max thickness. For example, I would not want to weld a square groove butt joint in Inconel in the GTAW process at 10 mm thick.
  12. capntom62

    Weld test coupon fixture design for GTAW in Aluminum

    We are in need of certifying some more GTAW welders in Aluminum in the Aerospace industry, 1G position. There are a few schools of thought when it comes to fixture design. Some say have a copper backing bar that is grooved out with the largest acceptable root reinforcement with Argon back...
  13. capntom62

    Is tack welding the ends allowed on AWS test pieces

    David is correct, I have not been back and have not been getting the emails notifications. Al (GTAW) answered my question in the beginning. IMHO, I would call it going off on a tangent and not hijacking. Knowledge is awesome especially by the audience here. Thanks
  14. capntom62

    Is tack welding the ends allowed on AWS test pieces

    I was told today that we do not allow the ends of WPS test weldments to be tack welded. I thought and have seen the ends to be tack welded to prevent the root opening too much on a groove joint, also on Tee joints. We are welding to AWS D17.1 Thoughts on this ?
  15. capntom62

    Welding thin Titanium with PTA or other?

    We are in the process of developing a new part. There are very thin (.005" sheet)sections adjacent to the weld joints. The corner joint materials are a little thicker at .060. Heat transfer is a the challenge. Years ago I used PTA to weld on very thin base metal without edge melt and burn...
  16. capntom62

    Looking for correct weld symbology

    First you need to define the type of joint. Is that a Lap joint ? The picture is a little unclear.
  17. capntom62

    17-4 Annealed vs H1100

    We have manufactured some parts using 17-4 in the as-purchased Annealed condition. Upon paperwork review, it was discovered that the customer blueprint required the H1100 condition. Uh oh, can we do anything or are they that much different ? The parts have been shipped. They are small stampings.
  18. capntom62

    Brass alloy with a very high microfinish ?

    We are looking for a Brass alloy that we can stamp into very small forms ( .005 thick < 1/2" long ) and process to a very high smooth luster for future electroless nickel plating. We are the stamping house and trying to help our customer. Currently they have specified and we have used Cartridge...
  19. capntom62

    Iron stains bleeding thru silver plate on 410 SS

    Hello: Newbie here. We are an Aerospace mfg and just received parts back from Silver plate (AMS 2410) and we are seeing what appears to be iron oxide bleed thru in the root of the threads on the inside diameter. Diameter is Ø 7.000. I sent one piece out for chemical analysis to see whether it...

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