Monday, April 22, 2013

[MW:17511] Name Plate Hydro Test pressure

Hi friends
 
Vendor has fabricated a process equipment with skirt support as per ASME Sec VIII Div.1
 
The height is 11 metres and ID is 4.5 metres.
 
The vessel is going to be erected at site in vertical position with skirt supports.
The HydoTest Pressure specified on drawing for Vertical position is 14.5 Kg/cm2g.
 
However Due to shop height restriction vendor is not able to conduct Hydro Test in Vertical position and  has done hydro test in horizontal position  adding the head difference ( for every 10 m height - 1 Kg/cm2g head to be added).
So the actual Hydro Test Pressure conducted in shop is at 15.5 Kg/cm2g.
Also he has mentioned the corrected hydro test pressure i.e. 15.5 Kg/cm2g on Name Plate.
Nothing is mentioned about this corrected pressure in drawing or QAP.
 
Is it correct ?
 
Does the fabricator have to mention the actual tested corrected  hydrotest pressure on Name Plate or the Pressure mentioned on drawing.
Please give code reference.
 
Regards
 
Prem Nautiyal
 

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