Grazie
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Thank you
Following will answer your query…
According to this the flange is not acceptable.
6.4.5 Flange Facing Finish. Flange facing finishes
shall be in accordance with paras. 6.4.5.1 through 6.4.5.3,
except that other finishes may be furnished by
agreement between the user and the manufacturer. The
finish of the gasket contact faces shall be judged by
visual comparison with Ra standards (see ASME B46.1)
and not by instruments having stylus tracers and electronic
amplification.
6.4.5.1 Tongue and Groove and Small Male and
Female. The gasket contact surface finish shall not
exceed 3.2 _m (125 _in.) roughness.
6.4.5.2 Ring Joint. The side wall surface finish of
the gasket groove shall not exceed 1.6 _m (63 _in.)
roughness.
6.4.5.3 Other Flange Facings. Either a serrated
concentric or serrated spiral finish having a resultant
surface finish from 3.2 _mto 6.3 _m(125 _in. to 250 _in.)
average roughness shall be furnished. The cutting tool
employed should have an approximate 1.5 mm (0.06 in.)
or larger radius, and there should be from 1.8 grooves/
mm through 2.2 grooves/mm (45 grooves/in. through
55 grooves/in.).
6.4.6 Flange Facing Finish Imperfections. Imperfections
in the flange facing finish shall not exceed the
dimensions shown in Table 3 (Table II-3 of Mandatory
Appendix II). A distance of at least four times the maximum
radial projection shall separate adjacent imperfections.
A radial projection shall be measured by the
difference between an outer radius and inner radius
encompassing the imperfection where the radii are
struck from the centerline of the bore. Imperfections
less than half the depth of the serrations shall not be
considered cause for rejection. Protrusions above the
serrations are not permitted.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ABHISHEK GHOSH
Sent: Friday, August 16, 2013 7:59 PM
To: materials-welding@googlegroups.com
Subject: [MW:18450] Inspection of Flange Face
Dear Experts,
During inspection of Flange ( WNRF) , I found some imperfections on Face of Flange .Kindly refer attached document to view snaps of 3 flanges. This condition is before hydro test. I found this during Bolt Torquing process.
Kindly guide me to decide whether these 3 flanges can be accepted or rejected ? - Also mention code reference in support of Acceptance or Rejection .
Thank you for your time .
Regards.
ABHISHEK GHOSH
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