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Thanks for your replies so far, they have been most helpfu. Can anyone advise how I can calculate the deccelartion rate on a 500NB check valve and a line velocity of 4.6m/s of seawater. Is there an industry accepted empirical formula to calculate this ? Cheers Peter

I have a 20 inch(DN500) pipe with a flow velocity of 4.5 meters per second, I have a few constraints and don't want to go to DN600, what are my options for putting a check valve in this line. Cheers Peter

I have a spread sheet with the valves for a project listed. It calls for a 300# ansi flanged 80dn ball valve, it then goes on to give the trim code as 080-SBBTST /00, I suspect that this code is not righ, to analise the trim code you need "Richards Selection Guide PIM-AA-05", I cant find this...

That is a great site reference. Thanks Ed.

Hi Col. I see that you are in Melbourne. I am in Brisbane and may be in Melbourne for a few days later in the month, I would be interested in seeing what you have achieved. Anyway here's my email steelstubs@optushome.com.au Cheers Peter.

Does anybody here use Inventor for structural steel work, and if so how productive is it compared to AutoCAD. Could Inventor be configured to model a structural steel project and then spit out the detailed beams and columns etc. I am seriously thinking of getting a copy of Inventor and having...

Thank you for those excellent links Fernando.

3Darray is an autocad command. To use it in lisp you need to add an underscore at the front of it like this command "_3DARRAY"

This will be off topic for most of you. I am having a debate that goes "War accelerates the development of scientific and technological knowhow". I believe it does. I am having this debate on a science forum with some rather testy chaps who think that it dosent. They say that there is...

You could try Steel Stubs, it has British and Australian steel shapes as well as all the US ones. It draws them in 3D from point to point just like a line. http://steelstubs.bizland.com I think it's good but then again I wrote it. Regards Peter.

Just press "Print Screen" and then open Paint and then paste in the screen shot. You can then use paint to clip out the toolbars, menue's etc and save to a file. Open Powerpoint and insert the file. Done.

It is highly unlikely that you are going to design a better seal but you may be able to upgade the seal standards on some of their pumps. Unlike like stuffing boxes mechanical seals are very sensative to the product and pump specifications. I would go to the original specifications of the pump...

Isometric piping is drawn in 2D usually. To draw isometrically in 2D go to the Tools pull down menu(ac2000) and select Drawing settings. Set the snap to isometric. You now have an isometric cursor and you can toggle the 3 main drawing planes with F5. It is a little difficult to dimention...

Down-load Ottopdf off the web, it will do the job for you and it's free. Peter.

Hi I would like to know what standard bolt or screw size is associated with a 5/8" or 3/4" ring spanner. ie. 5/8" ring spanner fits on nut(standard nut)what size would the bolt be. I dont want to go back to site to measure it. I know it is not a 5/8 bolt. Peter

Hi Download the PowerPoint tutorial for Steel Stubs. It has some slide presentations that will help you.The commands you need to look at are SOLPROF and SOLVIEW also see how you can use the clipping planes in the tutorial. http://steelstubs.bizland.com Good Luck Peter

I came across this site in my ramblings. Dont know if it's any good or not. http://www.vbdesign.net/cadpages/ Peter.

Got to the Bethlehem Steel web site and check out their archive section. There is a good database with names and properties of old steel shapes etc. Peter.

BigAl Change the DIMASO setting to on. Peter.

You will get a good but varied response from the structural steel detailers forum at http://groups.yahoo.com/group/steel-detail It is a very active forum. Peter