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It resulted to be, according to the designer, a *line* breaker, in the sense of B31.4 434.15.2 (a). So, a check valve downstream and a automated ball valve upstream will be installed. Thank you, guys.

I found this in a flow chart describing a group of pipes crossing a river (or the like). There are lines of brine, water and oil. Only the oil line has a "land breaker valve " on each side of the crossing. As the pipe is small, it seems to me like a typo - it should read " hand " not "land"...

Does someone know what is a LAND BREAKER VALVE ?

An example, from Wikipedia: "Santiago Calatrava Valls (born 28 July 1951) is an internationally recognized and award-winning Valencian Spanish architect, sculptor and structural engineer whose principal office is in Zürich, Switzerland. Classed now among the elite designers of the world"

Once I modeled a blind flange as shown in the picture, substituting bolts and gasket by axial displacement restrictions. I was interested in the nozzle, so I've skipped the bolt holes. This model is, as rb1957 said, unconservative towards the flange itself. I think that your model shoul include...

To buy the thing is certainly easier, but to build it is funnier. I´d use a Geneva wheel, with the suitable gear train. When loads are small, it´s precise enough to be used in movie projectors.

Thank you, all. Now I know yhat I didn't miss some hard-to-find footnote or interpretation. Thank you.

A vessel has been fabricated in a way that its axis is parallel to the mill rolling direction of the plate - like a pipe. It has a small diameter ( 550 mm ) and thick wall ( 32 mm ). Is that acceptable, to ASME code?

psafety, in addiction to the drain suggested, your vent may be covered with a light, loose lid ( attached by a string, to avoid beeing thrown away ). If the line doesn1t have constant flow, this will avoid any unexpected clogging.

what about a dead leg with expansion bellows ? And, if your problem is small enough, what about the kind of bellows used in pneumatic instrumentation? By the way, what does "adjustable" mean here?

If your tank is already built per API 650, Joe Tank said the last word. If not, API 620 would be more appropriated Anyway,there's a forum on tanks: http://www.ast-forum.com/index.asp

Shmulik, This is a tricky problem, that refuses to go away :-) As I posted, my job was to review the calculations, and I made the mistake of assuming that the indicated MAWP was correct. So I took the long way, until I noticed that it was a matter of redefining the MAWP as equal to the design...

AALAMI, B.; WILLIAMS, D.G. (1975). Thin plate design for transverse loading. London, Beccles and Colchester. 194p.

meanstone, I think that, with an adaptor, the problem will be worse. You'll have two leakage paths, not one. We use RF flanges because they are more efficient in sealing, using less bolt forces to squeeze the gasket enough. FF, on the other hand, avoid bending on flanges - what is no a problem...

There are still informations missing. Allow me to do some assumptions: - the pipe has not a large diameter - comparing with lenght; - the temperature differencial occurs from pipe ( higher ) to vessel ( lower ); - the number of temperature cycles is low ( like maintenance cycles ); If so, I...

SMontgomery119, I cannot see the attachment. So, I missed some details, as the size of things, pressures, number of cycles, and the like. It will be good, if tou provide them. About tha problem, have you considered to split it in two, calculate the flexibility of the piping, then apply the...

You may also use the pump used in haemodialysis - they pump blood, I think

Try a progressive cavity pump. It's a positive displacement device, and I remember I've saw once a fabricant claiming that it would be able to pump a tomato - without smashing it.

Shmulik, you're right. I use this to calculate a convex head in that situation. The problem is, while reviewing calculations done by others, I found that the head was thinner than required - and the head, already formed. So, I went back to the code, to find out if the part was, or not, useable...

Hello everyone, you kindly heard my problem, so allow me to share with you my findings. I'm using PVElite. the first point is that the design temperature is 200 C. Obviously, for hydrotest, I can lower it to 20 C, wich reduced a lot my problem, but not enough. Then, I changed the head from...