Many valves use adhesives such as Loctite for thread locking and cylindrical fitted parts. However, Loctite is not recommended for chlorine service do to the explosion potential due to outgasing during curing. Does anyone know of an adhesive that can be used in chlorine service?
Make sure that your clearly specify the conditions to the pressure relief supplier. Your conidtions are extreme and exceed the recommendations of just about every type of presssure relief valve that I am aware of. I would suggest that you specify that the set pressure be held tighter than...
I believe that the class designation are based on saturated steam. For example, when these class designations were established, with the flange materials in use at the time, that a class 600 flange was good for 600 psi saturated steam. As materials improved the actual pressure ratings...
I believe that Section VIII of the ASME Code requires the horizontally mounted pressure relief valves be designed and tested in the horizonal position. I'm not exactly sure of the wording. I am not aware of any ASME Code certified valves that have been certified in the horizontal position...
API only lists orifice sized for standard flanged valves. The best thing to do is to contact the valve manufacturer for technical information. If the valve has an ASME Code stamp then it should be listed in the National Board "Red Book".
In the mid 80's ASME Section VIII added rules for the capacity certification of liquid relief valves. The required overpressure was 10%. To achieve a full lift at 10% overpressure valve manufacturers redesigned their valves. One feature that most of these valves have is a "pop" action similar...
Many liquid pressure relief valves do not lift until the pressure is almost at the 10% overpressure value. At the pressure that the valve is set to open there is a very small amount of flow. The flow does not significantly increase until the high lift pressure is reached, which can be as high...
A valve set at 1250psig may actually be set as high as 1287.5 psig if you consider the 3% tolerance on set pressure. Also the valve may not lift until 1375 psig which is the 10% overpressure. If you provide more info on the type of valve I may be able to help more.
In addition to balanced bellows valves there are also balanced piston valves that have vents which should not be plugged. These two types of valves are shown in the "Crosby Pressure Relief Valve Engineering Handbook."
Plugging the vent, combined with a leaky bellows or piston seal...
