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  • Users: pch1
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  1. pch1

    Downstream steam pipe pressure

    Can anyone point me in the right direction for the following: I have steam in a 6" pipe at a pressure of 64 barg and a temperature of 400 C with a mass flow rate of 100 tons per hour. The 6" pipe is connected to a 10" pipe by means of a reducer and the 10" pipe is open to atmosphere. What...
  2. pch1

    Support stop to resist pipe axial load

    Can anyone point me in the right direction: I have a 10" pipe and need to design a support stop to resist an axial load of 45981 N. The pipe saddle I intend using is a Carpenter & Patterson Fig 384-2 which consists of two pipe clamps each 50 mm wide fitted around the pipe. How would I calculate...
  3. pch1

    Mismatch bores/ Wall thickness - Welding (EN and ASME)

    On a project, for economic reasons, we have pipe which has a thinner wall thickness than standard off the shelf fittings. Before anyone says to match the wall thicknesses (in an ideal world) you may want to consider the vast range of pipe wall thicknesses available in the EN standards. Could...
  4. pch1

    Unreinforced branch connections EN 13480

    I have had a quick look at set-on branches DN15 (WT = 2mm) onto a DN600 (WT = 6.3mm) pipe, but my results don't meet the conditions required by BS EN 13480. The piping system design pressure = 5 bar and design temperature = 100 Deg C. I have tried adjusting wall thicknesses of the pipes but to...
  5. pch1

    Dynamic forces exerted by a duct

    I have posted this topic in the piping and fluid mechanics section, but I was hoping to locate a standard to refer to: Can anyone help me locate a standard or similar that will guide me in determining the dynamic forces exerted by a gas flowing through a circular duct. I do have access to most...
  6. pch1

    Dynamic forces excerted by flue gas in ducting

    Can anyone help me locate a standard or similar that will guide me in determining the dynamic forces excerted by a gas flowing through a circular duct. (I did have access to an American piping book which showed an example of fluid flowing through a pipe and the force excerted by the fluid when...
  7. pch1

    Carbon steel (Basalt lined) pipe bends conveying sand

    Can anyone point me in the direction of a supplier (Pref UK) of carbon steel bends (Basalt lined) for conveying sand. Would anyone know what dimension the radius of the bends would be? (i.e. radius = 5D or 10D) Thanks in advance Paul
  8. pch1

    Threaded connections/fluid service BS EN 13480

    Can anyone point me in the direction of where to find a table or text that states where threaded joints may be used for a particular fluid to BS EN 13480. I have got hold of BS EN 13480 and can find the "Classification of piping systems by piping categories", but trawling through the rest of BS...
  9. pch1

    Wall thickness calc induction hardened pipe "Ultra 500S"

    Is it possible to calculate the wall thickness required for induction hardened pipe "Ultra 500S", when given the following stress values for the hardened pipe: Yield strength is 50 ksi and Tensile strength is 80 ksi. Given: P = 100 bar Temp = 50 Deg Celsius E = 1 D = 10.75 inches c = 0.04...
  10. pch1

    Can anyone recommend DN 15 fittings for cooling water pipe to BS EN

    Can anyone recommend DN 15 (1/2") fittings to be used on a cooling water piping, in a waste water treatment plant. The client's spec reads "Mild/carbon steel pipes, fittings and joints shall conform to the relevant provisions of BS EN 10216-1:2002; BS EN 10217-1:2002 & BS EN 10224:2002"...
  11. pch1

    BS EN 10216, BS EN 10224 & BS EN 1092-1 - Material grade selection

    Our client wishes for several piping specifications to be to BS EN standards. For a PN16 system, max pressure 10 barg, max temperature of 40 deg C conveying process water/ cooling water. Can anyone point out which grades of carbon steel to use with BS EN 10216 (Seamless steel tubes), BS EN 10224...
  12. pch1

    100 bar / 1451 psi sludge cake pipeline

    I am in the process of speccing a carbon steel sludge cake pipeline for sizes 1/2" thro 4". Given pressure is 100 barg (1451 psi), corrosion allowance of 0.04" and at ambient temperature (from table A-1 using an allowable stress of 20 ksi for pipe A106 Gr B). For the 4" pipe, I've selected...
  13. pch1

    BS EN 10216-1 pipe pressure ratings

    I have been tasked with creating a spec sheet for BS EN 10216-1 (and a few others) pipe, how do I go about specifying the pipe (BS EN 10216-1), material/grade and knowing which wall thickness would be suitable for a PN16 rating? I have experience with the American standards which when creating...
  14. pch1

    Flange to Flange alignment

    I have two skids to be connected together on site. I am looking for a table or similar that shows the maximum allowable misalignment between two flanges (Face to face misalignment, axial misalignment and rotational misalignment) that would still allow them to bolt together with a pressure tight...
  15. pch1

    Sourcing Breakable / Crackable padlocks

    I am based in the UK and a client has specified that all valve handwheels on a project are to have breakable padlocks with a common key. The environment is high humidity, saliferous. Unfortunately I have tried many suppliers in the UK but they are not familiar with breakable padlocks. Could...
  16. pch1

    Fillet weld BS5950-1:2000

    Using BS5950-1:2000 I've designed a lifting lug (50mm x 20mm Cross Sectional Area)and checked the welding using a 6mm fillet weld in accordance with section 6.8 Design of Fillet welds (6.8.7.3 Directional method) but it all seems too easy, am I missing something? The force through the lug is at...
  17. pch1

    British Steel Construction Handbook Required

    Would anyone be able to help me select a helpful structural handbook. When I was employed in South Africa I had a very useful handbook (Southern African Steel Construction Handbook - the 'Red Book') which included ladder design, base plate design and several other useful sections. Now that I...
  18. pch1

    Designing for blast protection

    I have received a request to check a steel cabinet design against a blast of 0.1N/mm^2. I have received from a consultant a list of beams suitable for the job and the thickness of plate to be used, alas there are no calculations or workings but just the answers. The cabinet dimensions are 4000mm...
  19. pch1

    3D valve blocks wanted

    I am using Autocad 2002. Does anyone know where I am able to get 3D valve blocks from? I am looking for Top Entry and Side Entry ball valves. I have seen a site (I think it may have been a link from the Autodesk website) that you could drag and drop components into Autocad but I couldn't find...
  20. pch1

    Minimum distance between pipelines

    I need to draw a 24" pipeline with ball valve that has an 8" bypass running alongside it. What is the minimum distance that can be used between the two pipelines? Is there a general rule of thumb I can use for any pipeline? Also what is the minimum distance that can be used from a...

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