What is the best way to differentiate between 17-4PH and 15-5PH material? My arc/spark machine results say the Cr content is lower than 17-4 range in the 15-5 Cr content range. Is there an appreciable difference in the amount of ferrite in 15-5 verses 17-4? What etchant will best show this...
Folks,
Anyone know a quick visual method for determining carburization on 3XX SS boiler tubes (waiting for coal ash corrosion is too long). I anticipate we will sandblast several strips across the pendants and then use ??? (etchant) to determine the severity of carburization the pendant is...
When the electric utlity plants I work with were built (60's, 70's, 80's), the original engineering construction firms, two different ones, used construction specifications that did not allow high pressure (2000-2900psi), high temperature (1005F) socket welding over 2". B16.11 is acceptable to...
Can Code Case 2235-9 - Use of Ultrasonic Examination in Lieu of Radiography Section I; Section VIII‚ Divisions 1 and 2; and Section XII be used for B31.1 pressure piping? My first answer is obviously no based on the criteria called out in the title of the code case, however, a contracted NDE...
I have an absorber tower where an MDEA amine solution is part of the process stream. Repair welding (fillet welds) is needed on the ASME pressure vessel. Almost every document I have researched instructs PWHT to be performed after repair welding. The material is 15/16" SA-212-B plate and the...
Does anyone have recommendations for a quality online NDE training program to satisfy MT and PT requirenments per SNT-TC-1A? We are investigating starting up our internal NDE program and sending multiple techs/ engineers to a training site is not an option.
Thank you,
Metalhoo
Why do I obtain readings from a calibrated portable alloy analyzer (Xray tube) of 45-58% Cr for A532 (28G) material which should be 23-30% Cr? Is it due to the volume of carbides on the surface of the cast impeller part between the interdedritic structure? I have no way of verify the...
From what I am told, in 1996 some electrode mfg's went to the ASME code stating they could not meet the mechanical requirements for a E9018 and others could. So the code was changed stating that the E9018 can now be used and called an E8018.
Well, the electrode suppliers who were able to meet...
I have a qualified PQR for welding P1 to P45 material with 5.11 filler material. I have created a WPS for joining these two materials together however I do not have spare P45 material to certify my welder.
Am I correct when referring to QW-403 that I can use another base material (say P1 to P1...
Per 2007 B31.1 Section 5, 127.2.1, E)"When austentic steels are joined to ferritic steels, the weld metal shall have an austenitic structure."
Does anyone have any thoughts on this statement for the example below?
For example, if one had a threaded/seal welded thermowell attachment where the...
Is anyone familiar with this material specification? We currently have this material on one of our half century old boilers and I'm trying to determine the correct P-number/F-number for repair of this material. It is a 2% chrome tube. Is it considered P5a or P4 material?
Thank you,
Metalhoosier
I have a vessel 14psig and 220F that needs repair due to a pinhole leak. The vessel contains sour service gas. The vessel is 40+ years old SA-212 material, 0.250 min wall thickness that was fully stress relieved after fabrication. We intend on:
1) performing a local hydrogen bake at 600F for 2...
Would someone mind giving their thoughts on this weld connection on a RH crossover? This was originally called out by the OEM. I would think a P5A to a P5B would last longer due to the closer coefficient of thermal expansion, especially with the fluctuation of temperature a RH can see during...
I have access to in service pressure vessels with NB numbers, or ASME Stamps, or both that have been installed over the past 40 years. I'm trying to sort and catalog these vessels to determine if further classification is needed. Can someone shed some light on what parts of what ASME sections...
