Force
– Two Piece Trunnion
Mounted Ball Valve
Document Number:
Revision:
Release Date:
EDC 514
A
05/09/2022
IOM: Installation, Operation and Maintenance Manual
29/43
Ⅵ. Periodic inspection
1.7
Disassembly
Refer to
Chapter VII for disassembly procedure.
1.8
Inspection items for disassembly inspection.
Refer to the table below for the items, methods, judgment and remedial measures of
disassembly inspection.
Inspection
components
Inspection
items
Detection
Method
Judgment
Remedial
measures
Body, Body
Cap
Flange
Corrosion,
Damage, Crack
Visual check,
Measuring
flange
thickness
No appearance
of corrosion,
damage or
crack.
Welding repair
or scrap
Fluids contact
surfaces
Corrosion,
Scratch, Crack
Visual
check,
Measuring wall
thickness,
N.D.E
No appearance
of corrosion.
Propriety of
wall thickness
Welding repair
or scrap
Ball seat, Ball
Seat surface
Corrosion,
Scratch,
Crack
Visual check
No appearance
of wear or
damage.
Replacement of
ball seat.
Ball
Corrosion,
Scratch,
Crack
Visual check
No appearance
of wear or
damage.
Replacement of
ball.
Stem
Corrosion,
Scratch,
Distortion
Visual
check
Dimensional
check
No appearance
of corrosion,
damage or
distortion.
Correction of
defects or
replacement.
O ring
,
Packing
and
Gasket
-
-
-
Replace these
parts at
disassembly.
Replacement.
