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  1. weldtek

    Aluminum to Stainless Threaded Connections for Cryogenic Service

    Are there any concerns over using threaded connections between austenitic stainless and aluminum fittings for cryogenic service with a simple thread sealant such as Teflon tape? Thanks for any input.
  2. weldtek

    Re - Normalizing Sec VIII - 1 Interpretation

    I found two interpretations in the latest volume ( 63 ) that pertain to normalizing P1 material, interesting. The interpretations are VIII-1-15-06 and 08. 06 Q- If a plate is normalized once at the mill and then is subsequently normalized again during manufacturing, does UCS 85 (c) require...
  3. weldtek

    Code Case 2235 Weld Procedure - Impact Testing HAZ's

    As many are likely aware the requirement for impact testing HAZ's in thicker materials changed with the 2013 Ed. UG 84 (g)(2) Some of you may have seen Code Case 2235 but if not it may be helpful to know that it allows for the use of PQR's qualified by the old rules ( prior to 2013) thru 2017...
  4. weldtek

    Div 2 - Test Specimen Heat Treatment - P5A

    I'm having some difficulty in understanding the requirements for the heat treatment of test specimens as discussed in Par 3.4.3. Condition A is to be the actual Max temp - 25 F and 80% of the hold time. Condition B is actual minimum temperature + 25 F and 120% of hold time. For PWHT, I...
  5. weldtek

    SA593-4

    Anyone know what this circa 1971 material was. Thanks, John
  6. weldtek

    Need Some Guidance

    We're fabricating a structural component using x95 drill pipe which is roughly 1.25 Cr / .5 Mo and its welded to c.s. Max weld thickness is around 3/4". Would it be advisable to perform PWHT and if so at what temp? Thanks,
  7. weldtek

    QW 193 Tubesheet Mockup

    QW 193 begins with ' When the applicable Code section requires the use of this paragraph...' I've reviewed UHX and UG 20 without finding a reference to QW 193. Does anyone know which paragraph, if any, in Sec VIII requires a tube sheet mockup and testing per QW 193? Thanks,
  8. weldtek

    Hemi Head Connection

    Can anyone recommend a good reference for the proper joint design when attaching a hemi head to a cylinder?
  9. weldtek

    UG-37 (h) Sec VIII and Compress

    Does anyone know if the current version of Compress is set up to handle calculating reinforcement in accordance with the '09 Addenda, where split pads are used ?
  10. weldtek

    AS3920.1

    Anyone know if Australia accepts pressure vessels designed and built to ASME Sec VIII? Is there any overlap between the Australian and ASME Codes?
  11. weldtek

    Compress Over Ride to Raise MDMT?

    Our engineer says that Compress does not allow the user to change the MDMT above -320F on an austenitic stainless design. Does anyone know if there is a way to input a higher MDMT?
  12. weldtek

    1966 Materials A7

    I'm looking at a customer drawing of a vessel built in 1966. Most materials referenced are 285 C but some are listed as A7. I suspect this A7 was a carbon steel structural spec probably roughly comparable to todays A36. Can anyone offer any insight?
  13. weldtek

    D1.1 2010

    Does anyone know the release date?
  14. weldtek

    Knuckle Radius for 2:1 Heads

    Code paragraph UG 32 (d) says that the shape of a 2:1 head can be approximated by a head with a knuckle radius .17D, and a spherical radius of .90D. UG 81 (a) provides tolerances for formed heads and says that the knuckle radius shall not be less than that specified. Is 'that specified' .17D...
  15. weldtek

    Comparison of Brinnel Methods E 10 & A 833

    I'm wondering how close one would expect results to be between portable Brinnel testing using a telebrinneller or equal, in accordance with A 833, and Brinnel testing in a stationary machine using a 3000 kg load? I realize there's more variables in play with the portable test method, but...
  16. weldtek

    Rerate of a Vessel by PWHT

    I'm wondering if any members have had any experience with re rating a vessel by using UCS 68(c In this case the customer would like to re rate their 70's vintage vessel, fabricated from SA285 GrC, from 44 F to 14 F, by way of PWHT.
  17. weldtek

    Time at Temperature, Normalizing

    How critical is time at temperature when normalizing carbon steel? Specifically, if the mill supplies green material with test coupons normalized for 1 hour/ inch, and the fabricator normalizes the part for 1/2 hr / inch, is there reason to be concerned that the test coupons don't properly...
  18. weldtek

    ISO 9000 Auditor Training Courses

    After a brief web search, it appears there are many courses offered. Can anyone make a recommendation as to a training course(s) offered in the US that will lead to accreditation as an auditor?
  19. weldtek

    Welder Qualification Test for Pulse-Mig

    Due to some non-fusion problems I've experienced with pulse mig, I'm contemplating implementing a 'special' qualification test for welders using that process. I'm thinking about a mockup to simulate a nozzle attachment weld where the welder would have to make a circular weld, as in production...
  20. weldtek

    Weld Buildup - Legal?

    There's no question that ASME Sec VIII Div 1 allows weld buildup under certain conditions. Specifically, it is allowed to 'restore' base metal for strength, and, for other purposes such as transitions in thickness. My question is, does the Code allow a fabricator to take a piece of plate say 1"...

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