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  • Users: rsauk
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  1. rsauk

    Greylock 14 (Graylock 14)

    Hi. I am interested in anyones experience in using 'Loload' spiral wound gaskets. In particular in the situation with bolting together ANSI.B.16.5 Slip On Flange to Weld neck flange. It has been suggested that using a traditional 'spiral wound' gasket is not recommended due to potential...
  2. rsauk

    wet steam destroys 'impingement' plate

    Several exchangers are having tube failures due to 'wet steam'eroding impingement plates and consequently tube failure follows. The steam inlet nozzle is 4"nb and is therefore very difficult to repair impingement plate. Is it possible to fit a 'diffuser' within the nozzle. If so,does a...
  3. rsauk

    Spark Testing Rubber Lined Tanks

    our inspection requirement is to 'spark test' a carbon steel rubber lined tank.. Unfortunately the rubber is now conductive due to long term exposure of Phosphoric acid. This results in positive response from testing eqipment. Has anybody experienced this and is there a different approach.
  4. rsauk

    Oil Cooler exchanger.

    what is the consequences of not having 'balance' holes provided in division plates, in channel ends. the tube side service is cooling water.
  5. rsauk

    failed tubes on exchanger unit .

    have you any particular info ; about suppliers of ferrules within UK.
  6. rsauk

    failed tubes on exchanger unit .

    We are experiencing recurring failure on tube-ends resulting from erosive action of quench water being redirected at velocity from division plate on channel end. Does any one have experience of providing 'sacrificial' barrier on tube sheet and including 25mm. into tube bore. Tubes are tube-end...
  7. rsauk

    hydrogen blistering ion Amine stripper

    The plate material for this amine stripper is A516-grd70. 38mm.thk. (presumably laminated) The bottom of this column has blistering which has cracked. The blisters are contained in a band approx 12feet (circumferentially) x 3feet blisters are linear (top and bottom) each blister being...
  8. rsauk

    Emergency foot valve

    I have been asked to consider the inclusion of "emergency foot valve" in a storage tank (BS2654) which will contain Hydrogen peroxide. Why is this and how will it operate. It is to be manually operated from top of tank.
  9. rsauk

    avoiding pwht on thick materials.

    I have a situation where 57mm.thick.cs. nozzles will be welded to vessel(set-on type) which is also 57mm. thk.(cs.) It has been suggested that somewhere in ASME V111 div.1 or 2. it is possible to avoid pwht. these nozzles are new nozzles which will be welded in-situ. Does anyone know if there...
  10. rsauk

    PVC Lined GRP tanks

    BS4994 requires pvc lining of GRP tanks to be radiused at intersection between tank wall and floor. With a sloping base(floor) it is very difficult to fabricate such a radius on pvc liner. One fabricator overcomes this difficulty by providing square edge (shell to base) configuration. Does...
  11. rsauk

    stress corrosion cracking in 316 stainless steel

    Thanks for your observations which concurr with my opinions.<br>However,the situation I found myself in with regard to this pressure vessel working at 0.7barg at temp. of 50 degrs.C was complicated by the fact that this cracking was discovered when replacing a vessel leg support, This support...
  12. rsauk

    stress corrosion cracking in 316 stainless steel

    We have a pressure vessel which exhibits micro cracking in the vessel external surface (underneath lagging).<br>Can we safely weld io this surface.

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