MULTIPLE RESTRICTION ORIFICE PLATE
PetroSan Oilfield Engineering Co. is ISO 9001 certifide quality manufacturer and fabricators of stanless, duplex and high nickel alloy material Multi hole restriction orifice, Multi-stage orifice, Multistage restriction orifice, Restriction orifice noise, Universal Orifice plate, Calibrated orifice, Flow orifice vs restriction orifice, Orifice Plate Assembly, Multi Stage Restriction Orifice Assemblies, Multi-Stage Restriction Orifice, Single / Multistage Restriction Orifice Assemblies.
Multistage orifice plates multi-stage restriction assembly.
- Single-hole, multistage design.
- Multi-hole, multistage design.
- Higher operating temperature and pressure limited by material and flange .
- Suitable for liquid, gas and steam flow measurement.
- Latest Specification Vertical Machining Centre (VMC).
- Accuracy ≤ ±0.5 % of actual flow rate.
- Repeatability of measurement of 0.1 %.

Restriction orifices are used to reduce fluid pressure or flow rate in a pipe system. The pressure drop caused by forcing flow through the restriction orifice is calculated properly, considering all relevant operational parameters.
If the desired pressure drop cannot be obtained using a single plate, a multi-stage restriction orifice assembly is necessary. The system consists of many orifice plates that reduce fluid pressure to their maximum capacity. This method reduces pressure in numerous stages to accomplish the desired pressure reduction without causing noise, vibration, or cavitation.



In fluid dynamics, a multistage orifice plate multistage restriction assembly is a form of flow control device that establishes a sequence of constraints to control the flow rate of a fluid, such as a gas or liquid. Here’s how the idea is broken down:
Multistage: This refers to the use of multiple stages or restrictions in series to achieve a desired flow control effect.
Orifice plate: An orifice plate is a flat plate with a precisely machined hole or opening, used to restrict fluid flow. The plate is typically placed perpendicular to the flow direction.
Multistage restriction assembly: This refers to the combination of multiple orifice plates or restrictions in a single assembly, designed to provide a specific flow control characteristic.
The multistage orifice plate assembly works by:
1. Creating a series of pressure drops: Each orifice plate creates a pressure drop as the fluid flows through the restriction.
2. Regulating flow rate: The cumulative effect of the multiple restrictions regulates the overall flow rate of the fluid.
3. Reducing pressure: The assembly can be designed to reduce the pressure of the fluid to a desired level.
This type of assembly is commonly used in various applications, including:
– Flow metering and measurement
– Pressure regulation
– Fluid flow control in pipelines
– Aerospace and industrial processes
Multi-stage restriction orifice assembly Applications :
- Power generation.
- Oil production and refining.
- Water treatment and distribution.
- Gas processing and transmission.
- Chemical and petrochemical industry.
Pipeline size range :
- From 0.5 inch (OD 20NB) up to 46 inch (OD 1150NB)
Material Grade :
For a multistage orifice plate multistage restriction assembly, the application, fluid type, pressure, and temperature determine the material grade. The following are some typical material grades:
1. Stainless Steel (SS):
304 SS (AISI 304): General-purpose, corrosion-resistant, suitable for most fluids.
316 SS (AISI 316): More corrosion-resistant than 304 SS, often used for harsh environments.
2. Carbon Steel (CS):
ASTM A105: Commonly used for high-pressure applications, suitable for non-corrosive fluids.
ASTM A350 LF2: Low-temperature carbon steel, suitable for cryogenic applications.
3. Alloy Steel (AS):
F11 (1.25% Cr, 0.5% Mo): High-temperature, high-pressure applications.
F22 (2.25% Cr, 1% Mo): High-temperature, high-pressure applications, more corrosion-resistant than F11.
4. Nickel-based Alloys:
Inconel 625 (UNS N06625): High-temperature, high-pressure, corrosion-resistant, suitable for harsh environments.
Monel 400 (UNS N04400): Corrosion-resistant, suitable for marine and chemical applications.
5. Titanium:
Ti-6Al-4V (UNS R56400): High-strength, corrosion-resistant, suitable for aerospace and marine applications.
6. Other materials:
Brass (e.g., UNS C36000): Suitable for low-pressure, non-corrosive fluid applications.
When selecting a material grade, consider factors like:
- Fluid compatibility.
- Pressure and temperature ratings
- Corrosion resistance
- Strength and durability
- Cost and availability
It’s essential to consult with a qualified engineer or materials expert to determine the most suitable material grade for your specific application.
Manufacturer and Fabricators of orifice plate, Multistage and Multistage restriction assembly :
Manufacturer of water line Multi hole restriction orifice, Manufacturer of oil and gas Multi hole restriction orifice, Manufacturer of fluid Multi hole restriction orifice, Manufacturer of Multi hole restriction orifice, Manufacturer of Multi-stage orifice, Manufacturer of Multistage restriction orifice, Manufacturer of Restriction orifice noise, Manufacturer of Universal Orifice plate, Manufacturer of Calibrated orifice, Manufacturer of Flow orifice vs restriction orifice, Manufacturer of Orifice Plate Assembly, Manufacturer of Multi Stage Restriction Orifice Assemblies, Manufacturer of Multi-Stage Restriction Orifice, Manufacturer of Single / Multistage Restriction Orifice Assemblies.
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