Dear Larry , usually the holding time for buried Piping should be 2 hours for the strength test and 24 hours for tightness test , while for above ground piping the holding time should be 30 minutes to two hours ( Depends on project Inspection ) providing that ALL welds should be accessible for visual inspection to any leak.
Regards,
Sohaib
From: Larry <quality@unieng.com.au>
To: materials-welding@googlegroups.com
Sent: Wed, December 8, 2010 4:18:47 PM
Subject: [MW:8611] Hydrostatic Test
Hi There,
Is there any table on holding time on hydrostatic test as per ASME B31.3 NFS, or any table in ASME code that would refer to it?
Thanks in advance.
Larry Zarate
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