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Orifice plate installation - how much straight pipe should be upstream and downstream?
Wiki User
∙ 14y ago
As a rule of thumb - 10 x pipe diameter upstream, 5 x pipe diameter downstream
Isuru
Wiki User
∙ 14y ago
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What is the plural of orifice?
Orifices is the plural of orifice
Orifice in a sentence?
By the time the fight was over, the boxer had blood flowing from every orifice of his broken body.
What is the order of efficiency of venturi meter orifice meter and rotoameter?
The orifice plate can easily be changed to accomodate widely different flow rates, whereas the throat diameter of a venturi is fixed, so that its range of flow rates is circumscribed by the practical limits of Dp.The orifice meter has a large permanent loss of pressure because of the presence of eddies on the downstream side of the orifice-plate; the shape of the venturi meter prevents the formation OS these eddies and greatly reduces the permanent loss.The orifice is cheap and easy to install. The venturi meter is expensive, as it must be carefully proportioned and fabricated. A home made orifice is often entirely satisfactory, whereas a venturi meter is practically always purchased from an instrument dealer.On the other hand, the head lost in the orifice for the same conditions as in the venturi is many times greater. The power lost is proportionally greater, and, when an orifice is inserted in a line carrying fluid continuously over long periods of time, the cost of the power may be out of all proportion to the saving in first cost. Orifices are therefore best used for testing purposes or other cases where the power lost is not a factor, as in steam lines.However, in spite of considerations of power loss, orifices are widely used, partly because of their greater flexibility, because installing a new orifice plate with a different opening is a simpler matter. The venturi meter can not be so altered. Venturi meters are used only for permanent installations.It should be noted that for a given pipe diameter and a given diameter of orifice opening or venturi throat, the reading of the venturi meter for a given velocity is to the reading of the orifice as (0.61/0.98)2, or 1:2.58.(i.e. orifice meter will show higher manometer reading for a given velocity than venturi meter).
What is the purpose of the vent and bleed hole in a orifice plate?
Bleed or Weep Holes are located at the elevational top or bottom of the Orifice Plate. The Weep Hole is tangent to a circle equal to 98% of the line I.D. DRAIN HOLES are located at the bottom of the Orifice Plate to prevent liquids in a gas or condensate in a steam flow from damming up behind the Orifice Plate. VENT HOLES are located at the top of the Orifice Plate to allow gases in a liquid flow to vent pass the Orifice Plate.
What standard is used for manufacturing and sizing the restriction Orifice plate and integral orifice?
As per R.W.Miller's hand book for flow measurement -- Bhadek
What is impulse piping?
It is the pipe which connects upstream and downstream pressure across orifice(constrictions) to the DP Transmitter.
Does a restriction orifice need a beveled hole?
Orifice plates which are used in flow measurement are mostly concentric "square-edge" type. The bore of the orifice is not constant when one moves from the upstream side to the downstream side along the cross section. The bore size is constant for a few mm only and then expands till it reaches the downstream face. This inclined cut is called the bevel in an orifice. The main reason to have a bevel in the orifice is to avoid turbulence thereby providing more accuracy to the measurement. Restriction Orifice plates are not beveled since their intent is to reduce the pressure only.
Difference between an orifice plate and a restriction orifice?
An orifice plate is a plat eused to measure flow. Pressure sensors are placed upstream and downstream of the the plate and hepressure differential is used with Bernoullis Equation t compute flow (including some experimental factors). A retriction plate is similar to an orifice plate but is much thicker. It is used to drop pressure upstream of a system. The convergence, throttlnig through thick section and divergece works the fluid and reduces total energy (transformed in firction, heat etc). This leads to an overall pressure reduction.
What is integral orifice instrument?
For pipe size <1/2",and clean fluid service,it is common to use orifice installed integrally with the differential pressure Transmitter.It provides compact installation and the overall accuracy is pre-determined.
What is the working principle of orifice meter?
An obstruction (orifice) is placed in a pipe filled with fluid. The pressure of the fluid is measured at two different points: 1) just upstream of the orifice and, 2) close to the contraction of the fluid (vena contracta). The difference in these two pressures is known as differential pressure. The differential pressure across an obstruction (orifice) in a pipe of fluid is proportional to the square of the velocity of the fluid. Many factors associated with the pipe, orifice and fluid affect the measurement. Satisfactory measurement requires steady-state, homogeneous, turbulent flowing fluids. Other properties which affect the measurement include: the ratio of pipe diameter to orifice diameter and the density, temperature, compressibility and viscosity of the fluid.
Where is the fixed orifice tube located on a 1997 cougar xr7?
On my Cougar, it is on the liquid line exit from the condenser. My application has post and nut line connectors, so if you have spring locks, it might be downstream, closer to the evaporator.
What is a propane orifice?
An orifice is a hole (as in "anus orifice"). A propane orifice could be created using brass. Consult your local professional.
What is the plural of orifice?
Orifices is the plural of orifice
What is vaginal orifice?
The vaginal orifice is the opening of the vagina
What is the meaning of orifice?
An orifice is an opening, cavity, or hole.
Vaginal orifice what is it?
The vaginal orifice is the opening of the vagina
How do you spell orifice?
That is the cirrect spelling of orifice (a hole or opening).
