When welding thin st/st (generally 304/316) tube we have traditionally TIG welded outside using a purge gas on the inside of the tube, but have previously tacked the assembly for trial fits without purge gasses.
A client has suggested that we should purge all tack welds as the oxide layer...
Interesting thoughts, thank you.
For clarification the jacket is outside of the vessel. The 92C mean temp calculated is the wall between the steam and the water.
The measured 80C figure was on the outside of the jacket (which is the outer skin excluding the insulation and cladding.)
We all...
Thanks again.
We know the worst case scenario is sufficient to cause stress points. For info the assmbly (horizontal cylinder) is 6 metres long.
I have been given an analysis by an unknown "expert" who has suggested that with steam at a nominal 105C will give a temperature on the jacket wall...
Thanks for the quick replies.
The tank is indoors and the ambient is 25 - 30C.
Wall thickness 3mm
Taking the temperature of steam seemed a good starting point, but that is also true of the outer jacket skin too, so the jacket and vessel shell would expand together = no problem.
We have...
We have a vessel that is heated with steam in an atmospheric jacket.
The steam is thus at atmospheric pressure. The bulk water inside the vessel is at approx 35C and static. How can I calculate the mean temperature of the material of the vessel shell (in this case stainless steel).
I...
having had the reverse probelm of trying to keep sugar from sticking (see sugar syrup thread) I know that moist conditions will make sugar stick....
Have you considered a fine water spray over the donuts before dusting with sugar?
Fuel quantity is not a great issue as we run sprint races off road that typically run max 8 laps of a 1/4 mile oval. Power is far more important!
In the UK we have had reports of some cars (ie Lotus elise converted to run on bio ethanol (which is now available as a pump fuel and thus can be...
I am thinking of converting a Honda Blackbird engined race car to run on Bio-ethanol as I've heard that reasonable power increases can be attained without mechanical changes. Has anyone got any views / advice? in particular what CO figures should be achieved or is there an alternative to use...
Agree with Katmar and to work out the length of which ever line you decide to use, (personally I'd take the centre line then add on a margin for rolling as it will need to be overlength anyway)Imagine rolling 1 turn along a flat surface. The diameter of the coil would form 1 side of a traingle...
Not sure where / if you will get one off the shelf but there are a number of companies that can build one specifically for your needs. If it's to be FDA approved I assume it's for the US, take a look at www.walkerstainless.com if you're in the UK try www.carlisleuk.com Hope that helps.
Does anyone have any figures for the latent heat capacity of cream as it cools and the various fats solidify?
I'm aware that there is an effect both as cream is initially cooled and as it is aged, and that the actual make up of creams can differ, but can anyone point me towards a source of...
Hi,
With reference to the cable tray, the biggest problem is trapped areas. Whilst conduit or trunking allows surfaces to be cleaned, dirt and bacteria can grow inside, the open format of tray at least allows the areas to be hosed down.
I tend to use tray "on edge" so that the horizontal area...
I've used Caustic at 85C without problem, and I'm not aware of any limiting factor up to boiling, though above 85C there is a lot of steam to contend with which can lead to changes in concentration over a period of time.
Most detergents have other chemicals blended in- surfacants wetting agents...
You shouldn't have a problem at 75C subject to what chemicals are blended with the caustic, We've used 85C without issue. Increasing temp will help your washes, But watch out for dangers of burns etc as temp is increased.
I'd generally suggest you dont drop below 1% solution.
The criteria you...
We are trying to feed granulated sugar from a hopper into preheated water to make a sugar syrup. The system works fine, but the steam rises from the water and dampens the sugar in the hopper causing blockages. We control sugar dropping with a rotary valve which has an air ring below (compressed...
