Search results for query: *

When does a "U" stamp vessel become certified? Is it after the U stamp has been applied, or after the data report is submitted, or after the vessel has left manufacturing facility. We have a U stamped vessel on which one of the openings needs to be modified. Vessel has not yet left the...

Is it permissible under code (VIII-1) to consider material (over and above the thickness required to resist pressure) in threaded (NPT) fittings as having reinforcing value? I could not conclusively decide one way or the other after reading UG-43. Thanks in advance to the forum for your feedback!

Under what circumstances would calibration of displacement channel (in tension) be necessary on tensile testing equipment?

I have found various sources (including manufacturer's websites) that tell me how to determine relieving capacity of a burst disk given a relieving pressure and disk size. I have read articles on Coefficient of Discharge and Resistance to flow methods. However, how do I determine the REQUIRED...

Use of Titanium Grade 4 (UNS R50700) is not permitted for use in PV applications per ASME VIII-1 as it is not included on Table UNF 23.4 Any idea why? Any code cases available that permit its use at all? I have looked at a lot of places and just cannot figure out the reason it is excluded and I...

All, Is there anything within VIII-1 preventing/prohibiting use of materials from ASME II-D table 1A/1B as a bolting material if the same is not listed in table 3? Thanks in advance for your help!

Greetings to all... We are trying to set up a tensile tester (United) in order to perform some tests per ASTM E8. As I read thru E8, I am having some trouble understanding the differences between constant strain rate and constant cross head speed. In my mind the two are the same since "strain on...

We are a manufacturing company and are looking to bring tensile testing capability in-house. We test to ASTM E8 for ASME VIII-1 vessels. Is a 17025 accreditation recommended or required? Any issues if we do not maintain such an accreditation? Thanks to all responders in advance.

Dear All, We currently outsource all of out tensile testing jobs. However, due to various reasons, we have been mulling the idea of bringing the work in-house. We need to perform tests per both ASTM (E8) and EN (EN10002-1 and EN10002-5) specifications on a regular basis. I foresee problems with...

With reference to section 8.3.2.2 of the welding procedure approval document ISO 15614-1, what does the following statement mean: "For branch connections and fillet welds, the range of qualification shall be applied to both parent materials independently"? I have a filet weld between two...

Dear Forum, Could you please give me some guidance as to what the requirements might be for bringing tensile testing (room temp only)services in-house? In particular, are there any specific equipment and/or personnel requirement? ASTM E4 did shed some light into the calibration requirements. But...

Dear Forum, In the ASME Secion IX book, QW-410.37 - "A change from single to multi pass or vice versa" is not included in the list of variables for GTAW for procedure qualification. Does this imply that such a change does not require re-qualification? Thanks!

Hi All, I have worked with PQR's and WPQ's for some ASME welds. What is the requirement for non-pressure retaining, non-critical welds - I am talking about mostly structural welds used to join non critical components together. Quite obviously, codes exist for the important stuff, but I cant seem...

Dear all: Having passed the FE last year, I have now accumulated the necessary number of years of experience most states (Iowa in particular) require to be eligible for applying for the PE exam. Unfortunately, none of the experience years were under the tutelage of a registered PE. There are no...

Dear all, Is there a way to use SAE Grade 8 bolts for ASME code applications? It seems SA354 Grade BD has comparable strength, but how do I re certify grade 8 bolts as SA354 Gr BD? Thanks in advance for your help!

Hello All, Could anybody please point me towards some tubing material that might take some pressure at around 1000C (1800F)? I know its a tough call, but I wanted to consult with the vast knowledge base that we have available here before calling it quits. Thanks in advance for any help on this.

I often find the need to calculate reinforcement area for openings in head and shells of PV's and mostly use SolidWorks in order to do the same. However, this software makes it very cumbersome to calculate areas from a cross section. Have any of you guys had any similar experiences and would...

Would the external pressure calculations of UG-28 apply to thermowells? I am concerned with ones that are essentially suspended (hung) inside a pressure vessel with one side free while the other side is part of a pressure retaining seal. As I read through the "Basis for external pressure...

Is there any logical way (besides FEA) to take credit for additional material available when considering a shell with a non-circular OD in comparison to a regular cylindrical shell? In order to clarify, if I were to compare a cylinder with ID=3" and OD=4.5" (i.e. wall thickness of .25" all...

Could anybody please help me calculate the required hydrostatic test pressure for external pressure on a piece of tubing? UG-99 seems to suggest that the hydrostatic test pressure due to external pressure is the same as that which would be required had the pressure been internal. Is this true...