COMO LEER E INTERPRETAR UN DIGRAMA DE TUBERIAS E INSTRUMENTOS ENTREGA 01

Introduction to Automation and Instrumentation

Overview of the Topic

• The speaker, José de Jesús, introduces the channel focused on automation and robotics.

• The session aims to delve into the reading and interpretation of piping and instrumentation diagrams (P&ID).

Understanding Piping and Instrumentation Diagrams

Key Components of P&IDs

• P&IDs consist of symbols that represent various instruments; understanding these symbols is crucial for interpretation.

• Instruments are depicted as circles containing letters and numbers: letters denote the instrument type/function, while numbers indicate their location in the plant.

Instrument Identification Standards

• According to ISA standard S5.1, instruments can be identified using up to five letters:

• First letter: variable associated with the instrument.

• Second letter: modifies the first letter.

• Third letter: indicates passive function.

• Fourth letter: denotes output function.

• Fifth letter: modifies third or fourth letters.

Examples of Instrument Identification

Reading Instruments

• An example illustrates an instrument with 'P' for pressure, 'D' for differential, 'I' for indicator, and 'C' for controller.

• The complete identification reads as "controller indicator of differential pressure located in section 37."

Further Examples and Applications

Additional Instrument Types

• Another example involves a flow meter where 'F' represents flow, followed by 'E' indicating primary element; it reads as "primary element indicator of flow located in section 25."

Importance of Location

• ISA standards emphasize proper placement of instruments either in-field or on panels for operator accessibility.

Detailed Analysis of Specific Instruments

Pneumatic Control Valves

• A pneumatic actuator valve controls process line pressure; it is self-regulating according to ISA standards.

Response Mechanisms

• In case of air pressure failure, valves may fully open or close slowly based on specific conditions outlined by ISA.

Level Measurement Systems

Level Indicators

• A glass level indicator shows liquid levels within a tank; it operates alongside an open loop system involving a transmitter and an indicator.

Signal Transmission

• Transmitters convert level measurements into standardized electrical signals (4–20 mA or voltage ranges), which are then displayed on indicators.

Flow Measurement Techniques

Primary Elements in Flow Measurement

• A primary element like an orifice plate creates a pressure drop proportional to flow rate; this relationship allows estimation of flow based on measured pressure differences.