Table of Contents
How do you identify an orifice in a pipeline?
An orifice tab is welded on the orifice plate which extends outer of the line giving an indication of the orifice plate.
How you would identify the upstream side of an orifice plate?
A text label printed on the paddle or handle of any orifice plate customarily identifies the upstream side of that plate. In the case of the square-edged orifice plate it does not matter which side of the plate is upstream.
What is orifice in pipe?
An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. A little downstream of the orifice the flow reaches its point of maximum convergence, the vena contracta (see drawing to the right) where the velocity reaches its maximum and the pressure reaches its minimum.
Why are regular orifice flanges installed in a pipe?
Orifice flanges are installed in a straight run of pipe in order to avoid turbulence at the plate. When installing the orifice plate flange the pressure taps need to be at the same elevation to each other.
Which way does an orifice plate go?
Ideally, this edge will be knife-sharp. Looking at the side-view of this orifice plate, the intended direction of flow is left-to-right, with the sharp edge facing the incoming fluid stream and the bevel providing a non-contact outlet for the fluid.
What are the different types of orifice plates and state their uses?
Types of Orifice Plates
- Square Edge (Standard) Bore. For the common square edge concentric bore orifice, the bore and bevel is the standard method of limiting the plate edge thickness.
- Quadrant Edge Bore. The quadrant edge bore is an orifice with the inlet edge rounded.
- Eccentric Bore.
- Segmental Bore.
- General Description.
What is orifice and its types?
Orifice is defined as the small opening on side or bottom of a tank through which any kind of fluid is flowing. The opening can be of circular, triangular or rectangular in cross section and they are named on the basis of shape accordingly. Orifices are mainly used for measuring the rate of fluid flow.
What is upstream and downstream in orifice plate?
For most piping systems it is 20 pipe diameters upstream and 5 Downstream for an orifice plate. (Vena-Contracta Taps are located 1 pipe diameter upstream of orifice plate and at the point of minimum pressure downstream, this point is called the vena-contracta. This point varies with Beta ratio.)
Which of the following is the orifice plate design?
Which of the following are orifice plate designs? The most common design is the thin concentric orifice plate (Answer A), which operates in the turbulent flow regime. Eccentric (Answer C) and segmental (Answer F) orifice plates can handle similar applications for fluids with solids in liquid or liquids in gas.
What is orifice flange?
An Orifice flange is a disc-shaped flange, engineered with either a Raised Face or a Ring Type Joint facing. The traditional orifice flange assembly consists of a pair of flanges, orifice plate, bolts, nuts, gaskets, jacking screws and plugs. Jacking screws ensure the easy removal of the primary flow element.
What are the types of orifice?