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  • Users: Seeker88
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  1. Seeker88

    Alloy 800 welding

    Hi folks, I have an existing PQR performed with alloy 800 plate and welding consumables. All of the mechanical tests were performed at room temperature. I now have a new project that I am considering using this PQR and deriving a wps from. However, the design temperature of the new project is...
  2. Seeker88

    ASME hydrotest thickness calculations

    Good afternoon folks, I would like to ask a question if possible please relating to the use of ASME VIII Div 1 for calculating component thicknesses at hydrotest. We are currently designing a shell and tube heat exchanger to ASME VIII Division 1 and the design pressure is 2980 psi on the...
  3. Seeker88

    Nitrogen Service for new vessels

    Hi folks, Just a quick question to ask if there are any specific concerns that need to be cosnidered when welding Carbon Steel components together for nozzles, dished ends etc in Nitrogen service. Design temp is minus 20 deg C and the operating pressure is less than 4 barg. We are using P1 or...
  4. Seeker88

    Adopt an ASTM Material for use in ASME

    Hi folks, Our company is well used to checking through certification of ASTM materials for ASME U Stamp applications. However, my question is as follows; Our client wishes to utilise ASTM A270 tube for a polished heat exchanger. He could get the material dual certified to ASTM A269 (the...
  5. Seeker88

    Chrome Moly Fillet Welds

    Hi folks, Just finished manufacturing a pressure vessel in Chrome Moly material including PWHT. Prior to hydro the client wants to add a welded earthing boss to the foot of the vessel i.e. not the pressure envelope. Would I be ok to preheat the area of welding and the boss then weld as per my...
  6. Seeker88

    Dissimilar welds involving Copper Nickel 70/30

    Hi folks, I am about to start manufacturing a pressure vessel in Copper Nickel 70/30 material. We have lots of existing qualifications for the 70/30 material but the end user now wants us to weld test pieces and gain qualification for 4mm fillet welds joining the following; P1 material to the...
  7. Seeker88

    Marking of Stainless Steel and Titanium

    Hi folks, I have received a question from one of our inspectors relating to the use of marker pens on Stainless Steel and Titanium. Can anyone please advise if there are any standards relating to good practice etc when using markers on these materials. In particular, are low chloride markers OK...
  8. Seeker88

    Quenching Stainless Steel Welds

    Hi all, Just a quick question as posed to me today by a coilleague. What would happen if you poured a bucket of cold water directly onto a stainless steel butt weld the intstant that the welding has been completed? Is the answer the same for most grades in the 300 series of stainless steels or...
  9. Seeker88

    Avoiding Weld Distortion

    Hi folks, I am currently looking at a possible project where we need to weld some 40" NB nozzles onto the side of a vessel which is 56" NB. Is there any references, books or websites that would offer guidance on placing internal 'star' stiffeners into the vessel prior to welding the nozzles so...
  10. Seeker88

    Eccentric cone design to ASME VIII Div 1

    Hi folks, Could someone give me a quick pointer to advise me if it is possible to design eccentric cones to ASME VIII Div 1. Is there an example calculation with formulas in the codebook etc. Any help you could offer would be greatly appreciated. Chas
  11. Seeker88

    Carbon Steel Forgin Suppliers

    Hi folks, I am looking to put out enquiries for Carbon Steel forged rings for us to machine into girth (body) flanges on some heat exchangers. Does anyone know of some good reliable US or European suppliers who can supply rings up to 85" OD x 7" thk in A105N material. Any help you could offer...
  12. Seeker88

    Lug design for local loading

    Hi, First confession - I am not using compress. What I am doing is designing lugs for local loading on a heat exchanger shell and I am trying to find a good worked example of resolving lifting forces and moments for chain angles of 30 degrees and 60 degrees etc. I have already designed the...
  13. Seeker88

    Lifting Lug Design

    Hi folks, Does anyone know where I can see a practical example of lifting lug forces and moments being resolved. I am designing lugs for a chain angle of 60 degrees and need to know how to reolve this force into horizontal and vertical components as well as moments. A practical visible example...
  14. Seeker88

    Manways

    Hi folks, Does anyone know of companies who will supply 20" (or 500mm diameter) manways with spring assisted openings for a design pressure of 150 psig and full vacuum service. Just to complicate matters further the material of construction is alloy C22. Many thanks Charles
  15. Seeker88

    Nozzle Reinforcing to API 661

    HI, I was wondering if anyone could offer advice on the above topic. We fabricate air cooled heat exchangers to API 661 but have recently received requests from clients to start performing nozzle reinforcing calculations as per section 5.1.11 of the code. Is there software available to perform...
  16. Seeker88

    Autocad Valve Drawings

    Hi, Does anyone know where I can find (free) a set of basic valve files that I can use on my project drawings. Any help you can offer would be greatly appreciated Kind regards CB
  17. Seeker88

    American based manufacturers of equipment to PED

    Does anyone know if there is a compreshensive list of vessel and heat exchanger manufacturers in the USA who can design and fabricate units that are PED assessed and suitable for putting into service in Europe?
  18. Seeker88

    Vibration in a rectangular heating tank

    Hi all, I am working on a project at the moment which consists of an oil heater tank (rectangular 3m long, x 2m wide x 2 m high - made from 6 mm thk Carbon Steel). The unit is suffering from vibration induced by motors from a burner placed below our heating tank. Is there any simplified...

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