RE: [MW:7283] Can we do painting prior to hydrotest?

You have not specified the type of component, fluid and design code.

ASME code for both vessels and piping have this provision. Sec VIII div 1 allows except for lethal service (UG 99) and B31.3 allows except for sensitive leak testing (345.3.1)

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Satish Hingalkar
Sent: Wednesday, September 29, 2010 11:55 PM
To: Materials & Welding
Subject: [MW:7276] Can we do painting prior to hydrotest?

 

Dear Members,

 

Our contractor has raised a design change request for painting prior to hydrotest.As per COMPANY specification,painting to be carried out after successfull complection of hydrotest,but contractor wants to do painting before hydrotest,can we accept this deviation? if  we want to accept the deviation,what criteria to be follow??

 

Our design conditions are 105 barg hydrotest pressure and design temp.85 deg.c,NDT is 10% MT & 10% RT.

 

Waiting for reply.Pl.respond ASAP.

 

Regards,

Satish