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Coker Furnace Supports

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This topic contains 1 reply, has 2 voices, and was last updated by  Anonymous 12 years, 6 months ago.

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  • #2720


    We have had the occasional lower radiant furnace tube move off of its J-Hook support, which we believe is linked to uneven thermal growth of the tube during on-line spalling in combination with end-tube support restrictions (not able to freely slide through circular tube support hole into header box).  The dropped or drooped tube often remains in service until a planned shutdown, though we have done on-line support installation in some cases to avoid shutdown. Does anyone use a bar or other device to supplement the basic J-hook to reduce the frequency of such events?

  • #5528


    We use Ladder type supports  (all within radiant cell including tube return bends and no ETS) in DCU heaters with heater outlet point ( through heater casing) with zero vertical movement. Coils move upwards and the expansion is absorbed in the cross over tubes.

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