Dear friends,
one of our fabricator is insisting on conducting hydrotest on a vessel at shop (designed to ASME Sec VIII), with scaffolding fixed inside. they do not intend to remove the scaffolding.
Can someone throw some clarity on this, how decision to be taken OR pros & cons be established
Hello Friends
We have a specification that calls for a BOND STRENGTH in cladded (2-14 Cr + SS347) plate. The clause states that the "Stainless Steel Bond Strength shall be at the upper yield strength at the low end, and approaching the UTS at the high end"
Now i am feeling confused, since as...
Dear Friends
Few years back I faced a peculiar problem in few pressure vessels, where we found that Pressure vessels have become magnetic after fabrication - all these pressure vessels were Weld overlaid & a couple of them were Heat Exchangers.
The metallurgy of the equipments was LAS-2-1/4...
As per UW-42, is it permissible to restore a dished head thickness falling below the minimum required thickness?
One of my fabricator has deposited the welding as per UW-42 onknucle of an ellipsoidal head The min req. thickness was 10mm, but observed was 9.6mm.
Any input would be highly...
Hello
reviewing some test certificates of spiral wound gaskets for one of our projects. the supplier has not conducted compression and recovery test for our non standard gaskets. When contacted, he says that he would need no. of bolts and bolts diameter to conduct this test.
As i understand...
Sorry if the question is silly, but a little confused here.
If material SA387 Grade 5 class1 changes to class2 or class3, should the welding consumable selection be affected?
OR would it need requalification?
Currently welding SA387 grade 5 class 1 with E8018-B6.
Hello
I am required to do a high temperature tensile test on plate material SA387 Grade 11 Class 2.
The design temperature at which I am required to do the test is 549 deg. C. I have chosen 550 deg. C as nearest round up.
As such, ASME Section IID provides high temp tensile and yield...
Hello
API-660, clause 7.6.4.6 states that 'perforated impingement plate baffles shall not be used'. Can anyone throw some light on the logic behind this prohibition? Any input would be appreciated. Thanks.
Hello experts.
We have some valves with Inconel 625 material (cast valves with ASTM A494-CW6MC grade material). The valve is machined with RTJ groove. My query is regarding the hardness of this material for RTJ groove specified by the client. Our client specifies that hardness to be minimum...
Hello
Please refer the attached photographs. These pictures belong to a cast product. I have observed some unevenness/modulation in the surface. this unevenness is evident on touching also. This is inherent of teh casting. Note that the casting is now in machined condition. I have also notice...
Hi
I recently met a case, where for a Heat Exchanger, tubesheet is specified to be of SA965 Gr 316L. However, my suppliers intends (and infact has already procured) material with SA182 Gr 316L material. On comparing, I find that the material chemical composition and mechanical properties are...
Hello
I am reviewing a WPS where my supplier has to weld A213 T22 tube to a thermocouple pad of material UNS44600. The operating temperature is max 610 deg. C. They are using ENiCr-3, which is classified to be used upto 480 deg. C. My earlier preference was to suggest them the use of ENiCrMo-3...
