Pulsation Dampener - Integral Flange Face / O Ring Piping Base
The higher the pressure for a shell, the thicker the wall. The smaller the diameter of the vessel the lower the cost. Economic volume for high pressure therefore comes in tall slim dimensions. Hence the PULSEGUARD "SlimLine" pulsedampner range. When the external environment requires the vessel body to be from stainless steel - example Oil & Gas Production Platform use, - PulseGuard "SlimLine" Pulsation Dampeners are near mandatory.
To accommodate these requirements PLUS enable these slim body of the pulse Damper to take multiple connection, and continue to give fast supply, the PULSEGUARD PipeGuard HP pulse dampner range are pre-manufactured with a bolt pattern and a Smooth "O" ring face, called SF-"O" type.
System integrity is maintained by releasing the dampers form the system but replacing them with the through flow blinds that we provide, Pt # --dampner/--number/"TFB".
In this "&PB" condition the dampener, is an discharge acceleration head accumulator AND a multi port piping base pressure pulsation interceptor, that isolates pump activity from the system response pulsation.
For single flanged connection accumulator condition Please see drawing / view sheet PigO+1Fg.bmp "Accumulator with Stainless St, & Elastomer"
High, extreme, super, ultra, pressure pulse dampeners design using elastomer Gas bag, nitrogen sac, air balloon, n2 bladder
with liquid outside any of Those membranes, and therefore having to have a corrosion resistant, to the Process liquid, pressure vessel shell, body, housing part. To act as - aka discharge "dampners" - outlet "bottles", acceleration head Reducers, flow fluctuation accumulators for pumps.
1. Dampener bladder membrane elastomer
2. Pressure bottles' housing / vessel for pulsation dampener - bottle "snubber" pulsation suppression device - accumulator:
dampener design pressure being established by an addition, to max working pressure, of 10% - on the basis that a direct acting rv set pressure is 10% above max working pressure. Plus that said rv has a 15% accumulation pressure to fully open. *
in which the factor above is determined by the degree of surity of the cylinder wall being perfect, for example: a "snubber" seamless wall of hot rolled or drawn pipe, a punch forged cup, a forged billet machine bored to form a hollow, the factor is 1
a "suppression device" cylinder formed by any longitudinal welding or joining method the factor is 0,7 where there is a longitudinal joint that has been certified as free of all imperfections by x-ray, the factor may be 0,9
said "allowable working stress" for the dampner material being determined by the lesser of
yield strength x 0,625 , or the ultimate tensile strength x 0,25. no allowable working stress shall be determinable unless the ductility of the material and any jointing is at least 20% elongation at break. said dampener jointing procedure shall have been proven by root, side, and cap bend tests. further assurance of a jointing method may also be indicated by
x-ray, but failure to pass tight radius bend tests is the only acceptable criteria for application to dampner manufacture because they are by definition for a cyclic stress duty, hence ductility for the avoidance of work hardening is of paramount importance. *
c. Retention, against dampener internal pressure, of said end plug within said cylinder, by means that can not be removed without first the depressurization of the cylinder; aka "tamper proof means". preferably said tamper-proof means being a segmental lock ring in a groove that is of a depth into cylinder wall of near 0,45 of the cylindrical wall thickness, groove beginning at a distance in from cylinder end face of 1,4 x wall thickness, and being 0,8 wide
d. Said damper tamper proofing means so arranged that the seal of sealably located end plug will cause the escape of the seal at a pressure above 4x design pressure, and below destruction pressure - thusly ensuring "fail safe" *
e. Having pulsation dampener pre-fill cushion gas filling and venting point that enables both operations without the use of any special tools. typically said filling and venting being operable to open and close with a 3/4" af wrench.
f. Said end plug of the dampener acting as gas end of housing, manufactured from stainless steel to sa 240 grade 316/316l but containing no "titanium kill". Or appropriate corrosion resistant material to customer specification.
g. Integral to cylinder end piece being connectable to the system liquid to be dampened, inlet and outlet means adaptable to the separation between said inlet and said outlet.
Precharge Gas in Elastomer Bladder Type
Gas Bladder Flow Fluctuation Accumulator
Integral Flange Face / O Ring Piping Base
Stainless Steel Flow Fluctuation Accumulator
Plastic Pulse Damper with Co-ax Option
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Click on the picture of the damper below to see how it works and is assembled, animated.