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DSB123, 1)If can not find any hardstamp, You known that some PE design code permit to assume the allowable stress of materials as low as 13000 psi, determine the tensile strength by hardness test or if serious, cutout some the vessel sample then test by mechanical testing, so you can use this...

We confuse that why ASME required demonstration, if demonstration it will like you do the PQR.

1)try to find some hardstamp on the vessel part, your may got material grade and related operating data. 2) calculation the min. required thk. for internal pressure and any mechanical load. 3)Do NDT on welding seam to determine the joint eff. of the vessel. 4)Determine the new operating...

What is the code concept? it require PQR or not? (like AWS Prequalified) thank for any help..

chicopee, you can click "click here to download" and don't worry about flashing sign, it's safe.

Your should do as owner required/ determine.

Now, we found severe CUI attack at the skirt of vessel as detail below: Vessel size: 6'6" dia x 17'2"heigh Material: SA516 Gr.70N (shell, head and skirt) skirt nominal thk: 12.70 mm remaining thk.: around 3.50 mm entire the circum. of skirt. empty weight: around 85000 lbs const. code: ASME VIII...

Background: Exist process piping weld joints (2.5, 6, 14 & 20 NPS) on vessel installation were inspected with UT-TOFD & RT and found lack of side wall fusion, lack of root penetration and gas porosity on ~120 weld joints which it unacceptable by applicable current standard (original...

sacazu, if localized is not big and API 653 is allow welding repair, the easy way is to weld fullfill buildup (groundflush finish).

Tankdude, If the tombstomes are thickened inserts, you can consider the "C" dimension (only 3"), not the "D" dimension. Check out the footnote on the S-N detail.