Introduction to Plant Design and Chemical Engineering Equipment

Comprehensive vocabulary flashcards covering the core principles of plant design, piping components, codes and standards, fluid and solids handling, rotating equipment, and chemical reactors.

Plant Design

The systematic process of creating a blueprint for a chemical plant that can manufacture products safely, efficiently, economically, and sustainably.

Conceptual Design

The initial plant design phase focused on a broad, high-level feasibility study of the process, defining products, required capacity, simple block flow diagrams (BFDs), and rough capital cost estimates to reach a 'yes or no' decision.

Basic Design (Front-End Engineering Design / FEED)

The design stage that defines the process more clearly prior to major investment, producing preliminary P&IDs, PFDs, accurate mass/energy balances, preliminary equipment sizing, and utility requirement estimations.

Detailed Design

The final engineering design phase that prepares the plant for construction and operation by creating exact equipment specifications, 3D layouts, stress analysis of piping, instrumentation integration, and final cost estimations.

Revamp / Retrofit Design

A plant design project focused on improving, upgrading, expanding, or modernizing an existing plant through debottlenecking, energy efficiency enhancements, environmental compliance upgrades, or feedstock switching.

Process Flow Diagram (PFD)

A schematic diagram used in process engineering to indicate the general flow of plant processes and equipment, displaying the relationship between major equipment items and primary streams without showing minor piping details.

Piping and Instrumentation Diagram (P&ID)

The primary schematic drawing used for laying out a process control installation, showing the interconnection of process equipment and the instrumentation used to monitor and control the process.

ASME Boiler and Pressure Vessel Code (BPVC)

A recognized engineering code that governs the design, fabrication, inspection, and testing of pressure vessels, boilers, and associated pressure containment components.

ASME B31.3

The standard engineering code that establishes requirements for materials, design, fabrication, assembly, and testing of chemical and petrochemical plant piping systems.

Pipe Schedule

A standard numerical designation specifying the wall thickness of a pipe, approximately related to internal pressure and allowable working stress by $\text{Schedule Number} ≈ \frac{1000 P}{S}$.

Elbow Fitting

A pipe fitting used to change the direction of a pipeline, typically manufactured in $45^{\circ}$ and $90^{\circ}$ angles.

Reducer

A pipe fitting designed to connect pipes of differing diameters together to transition flow area and manage velocity.

Valve

A mechanical device used to control, regulate, or direct the flow of fluids through a piping system by opening, closing, or partially obstructing the flow pathway.

Tee Fitting

A T-shaped pipe fitting used to create branches or splits in a pipeline, permitting fluids to combine or divide.

Coupling

A short fitting used to join two lengths of pipe together, typically for permanent or long-term inline connections.

Union

A pipe fitting similar to a coupling but designed to allow easy and non-destructive disconnection of piping segments for maintenance, inspection, or repairs.

Cap and Plug

Fittings used to seal off the terminal ends of pipes when lines are not in active service or must be closed temporarily.

Cross Fitting

A plus-shaped fitting providing four intersecting openings that allow fluid distribution or convergence across perpendicular piping segments.

Hoop Stress

A circumferential mechanical stress acting perpendicular to the longitudinal axis of a pipe or vessel cylinder wall, generated by internal fluid pressure.

Axial Stress

A normal longitudinal stress acting parallel to the centerline axis of a pipe, induced by internal pressure, thermal expansion, fluid weight, and external mechanical loadings.

Economic Pipe Diameter

The optimum internal diameter of a pipe that minimizes the total annualized cost by balancing capital investment against ongoing pumping energy expenses.

Equivalent Length

A measure of frictional resistance in fluid mechanics representing the length of straight pipe of the same diameter that yields the identical pressure drop as a given fitting, valve, or disturbance.

Velocity Head

A measure of the kinetic energy per unit weight of a flowing fluid, directly proportional to the square of the fluid velocity.

Fouling Factor

A design allowance representing the thermal or frictional resistance caused by the progressive accumulation of scale, deposits, or corrosion on pipe or heat exchanger walls.

Orifice Meter

A differential pressure metering device containing a plate with a constriction orifice inserted into a pipeline to measure flow rate based on head loss.

Venturi Tube

A flow metering device that measures fluid velocity by constricting flow through a smooth convergent cone and throat, minimizing permanent pressure loss upon recovery.

Pitot Tube

An instrument that determines flowing fluid speed at a specific point in a stream by measuring the difference between stagnation pressure and static pressure.

Dilute Phase Pneumatic Conveying

A pneumatic transport system where particles are fully suspended in high-velocity air at relatively low pressure to move bulk dry solids through pipes.

Dense Phase Pneumatic Conveying

A low-velocity, high-pressure pneumatic transport method where bulk solids move as slugs, waves, or plugs, preventing degradation of fragile or abrasive materials.

Angle of Repose

The steepest angle of descent relative to the horizontal plane to which a granular bulk material can be piled without slumping; its tangent equals the coefficient of sliding friction.

Belt Conveyor

A mechanical conveying machine consisting of a continuous belt supported by pulleys or idlers used for high-capacity transfer of bulk solids over long distances and inclinations up to $30^{\circ}$.

Screw Conveyor

A mechanical conveyor that utilizes a rotating helical screw flight in a stationary U-shaped trough to push sticky, viscous, or granular materials forward.

Bucket Elevator

A vertical mechanical conveyor featuring spaced or continuous buckets attached to a loop of belt or chain to elevate bulk materials between elevations.

Drag Chain Conveyor

A bulk handling machine (also known as a Redler machine) that pulls material inside a closed rectangular trough using a single or double chain with flights.

Centrifugal Pump

A dynamic fluid transport machine in which a driven rotating impeller imparts velocity and rotational kinetic energy to liquid, converting it into pressure head within the casing.

Diaphragm Pump

A positive displacement pump that uses the reciprocating deflection of a flexible diaphragm to displace liquid without dynamic packings or mechanical seals.

Gear Pump

A rotary positive displacement pump that moves viscous fluids under high pressure by trapping liquid within the teeth cavities of rotating intermeshed gears.

Peristaltic Pump

A positive displacement pump that advances fluids through a flexible tube by squeezing it progressively with rotating rollers or shoes.

Net Positive Suction Head (NPSH)

The margin between the absolute total pressure at the pump suction nozzle and the liquid's vapor pressure, required to exceed a designated threshold to avoid cavitation.

Cavitation

A destructive hydraulic phenomenon occurring when static pressure drops below fluid vapor pressure, generating vapor bubbles that violently collapse in high-pressure regions.

Positive Displacement Compressor

A gas compression machine that raises fluid pressure by trapping a fixed volume of gas inside a chamber and mechanically decreasing that volume.

Dynamic Compressor

A continuous-flow compressor that uses rotating impellers or blading to impart high kinetic energy to gas, which is converted to static pressure in a stationary diffuser.

Fractionator Liquid Drum

A horizontal or vertical cylindrical process vessel positioned between major equipment to provide surge storage capacity, liquid holdup, and vapor-liquid disengagement.

Cyclone Separator

A static separation vessel that uses high-velocity tangential inlet gas flow and centrifugal acceleration to remove suspended solid particles or droplets from a gas stream.

Continuous Stirred Tank Reactor (CSTR)

A continuous open reactor operating at steady state where reactants are continuously fed and agitated so that the mixture is fully mixed with uniform composition and temperature identical to the effluent stream.

Tubular Flow Reactor (TFR)

A continuous reactor where fluids pass through a cylindrical tube under assumed plug-flow conditions with no axial mixing, yielding high conversion rates per unit volume.

Fluidized Bed Reactor

A heterogeneous chemical reactor where fine solid catalyst particles are suspended in an upward stream of fluid, displaying fluid-like behavior with high heat transfer efficiency.

Industry 4.0

The trend toward automation and data exchange in industrial manufacturing, incorporating simulation software, digital twins, and smart sensors into plant design and operation.