Page 56 - GarlockFluidSealing2010

B-24
Expansion Joint Installation
Preparation
Check service range
¦ Double check performance limits against anticipated
operating conditions
¦ Check temperature, pressure, vacuum recommen-
dations
¦ Check total joint defection—alter as needed to
reduce defection to correct range
¦ Anchor lines
Check location
¦ Proper location is usually close to main anchoring
point
¦ Install pipe guide(s) for proper alignment
¦ Joint should absorb pipeline expansion / contraction
between fxed anchor points
Check cover
¦ Check outside joint cover for damage
¦ Cover will keep harmful materials from penetrating
joint carcass
Check alignment
¦ Alignment should be 0.125" (3.2 mm) or less
¦ If 0.125" (3.2mm) must be exceeded, use a special
offset joint
Check support
¦ Weight must not be carried by joint
¦ Support with hangers or anchors
Check fanges
¦ Clean all mating fanges
¦ Do not gouge or mutilate surfaces during cleaning
¦ Carefully examine used parts for smoothness
Installation
Apply lubricant
¦ On elastomeric joints only, not required with all
PTFE- or FEP-lined joints
¦ Coat rubber faces with graphite in water, or
glycerine, to prevent joint adherence to pipe fanges
Insert bolts from arch side
¦ On elastomeric joints only, not necessary with PTFE
joints/couplings with threaded holes
¦ Set bolt heads adjacent to arch
Tighten bolts
¦ Elastomeric joints only, tighten gradually and
equally, alternating around fange
¦ Edges of joint must bulge slightly at fange O.D.
Check tightness
¦ Within one week after application, then periodically
¦ In hot or cold water systems during cyclical changes
Typical Piping Layout Proper Use of Anchors in Branch Connections