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  • Users: Rakesh2560
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  1. Rakesh2560

    Valve selection for NGL service

    Greetings All, I am new in the field of valve selection and am looking for information related to selection of valve .We are looking to purchase a 24" , 300# Emergency isolation valve for one of our plant we have received offer from different vendors however i have a few questions The service...
  2. Rakesh2560

    flanges A105 and a707

    can we utilize the flange A707 in place of A105 for a steam service ? A707 is a low alloy steel forging utilized for the low ambient temperatures but in my case the ambient temperature is not an issue . I need to understand if there will be any issues from welding point of view also as A105 is...
  3. Rakesh2560

    Ordering boiler tubes

    I am trying to order spare tubes for our 50 years old boiler the tubes are 2.5" and are between steam and the water drum (It is a water tube boiler ) My question is regarding the length of the tubes are the tubes ordered as straight length and then modified at site to have the required bends ...
  4. Rakesh2560

    meaning of dimension

    Greetings all, I have a question related to dimensioning in boiler i was reviewing the drawings for tubes in economizer in our water tube boilers where is observed dimensioning in the following manner 44S X 115P= 5060 (16' 7 3/16") as distance between centre of tubes and bolt hole. my question...
  5. Rakesh2560

    sealant inection in valves

    I am new to selection of valves and would like to know what type of valve are provided with sealant injection points ? Also is there a standard which governs the selection of such valves and where can I get guidelines on sealant injection I understand its vendor specific but would like to know...
  6. Rakesh2560

    12" butterfly sticky issue

    We have 12" butterfly valve which has sticking issues this butterfly valves are triple eccentric with pneumatic actuators and are used in cyclic regeneration service when at the end of each cycle the butterfly valve is closed it often sticks we are looking forward to investigate the issue the...
  7. Rakesh2560

    support plate attachment to scrubber shell

    We have a Acid gas scrubber in our plant during the recent shut down we found that the hold down plate below the distributor and the support plat which supports the packings were damaged. The vessel drawing is not showing the connection of the hold down plate and the support plate to the shell I...
  8. Rakesh2560

    Material for flue gas stack

    I have to select material for isolating the boiler from stack (two boilers are connected to same stack we need one for maintenance) . I am not sure for which material to use for blind ? Our planner has offered a283 gr8 c which is a structural steel grade when I referred as me sec 2 part d it...
  9. Rakesh2560

    60 inch butterfly valve with a drain?

    Greetings friends, Needed a little help we have a 60 inch butterfly valve in a flare line which is passing it has got a small bore gate valve connected to it right opposite the drain we just wanted to know the purpose of the valve can any one tell me what's the purpose of small bore valve...
  10. Rakesh2560

    Tube sheet material deviation

    Hi all , we are in process of procuring tube bundle for our Kettle type S & T heat exchanger the following are the design parameters Shell side tube side corrosion allowance 0.125 0.125 design temp F 415 / 41 MDMT 500 / 41 MDMT deisgn pressure psig 75 / FV...
  11. Rakesh2560

    Tube sheet material in S & T heat exchanger

    hi Everyone, I have a question regarding the material used in Tube sheet construction I am in process of inkind replacement of tube bundle in one of our shell and tube heat exchanger the vendor has suggested me a change in tube sheet material from SA 515 Gr 60 SS clad to A266 Gr 4 SS clad .I...
  12. Rakesh2560

    Why is the sliding suppport supported on 4 nos springs

    Hi all, I am presently working on modification to be done on a vessel for which i needed to check the nozzle loads which requires me to model the vessel in ceasar.The vessel that i am talking about is an horizontal vessel which has one fixed support and other support is resting on 4 nos spring...
  13. Rakesh2560

    Differnce between pzv designed by ASME BPV Sec I for power boilers and ASME Sec 8 div 1

    What are the basic difference as regards to design and testing for pzv which are designed as per Sec 1 and Sec 8 div 1 . We have recently reclassified the vessel as Sec 8 div 1 from Sec 1 should the pzv of the vessel be also reclassified as per sec 8 div 1 from sec 1.
  14. Rakesh2560

    single PZV instead of multiple PZV SETUP

    Hi all, We are in process of providing single PZV instead of existing two PZV INSTALLATION .This is done as there is a requirement for isolation valve at inlet and we need two PZV functioning at a time in current situation .So we are thinking of resizing the PZV so that the combined relief of...

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