Home>API standards>API RP 554-3-2021 pdf free download

API RP 554-3-2021 pdf free download

API RP 554-3-2021 pdf free download.Process Control Systems— Project Execution and Process Control System Ownership.
1.2 Document Organization This document is organized to follow the sequence of activities associated with the typical life cycle of a PCS as summarized in Table 1. The life cycle phases as they apply to PCSs are as follows. — Appraise. Develop business goals and requirements and identify basic functions required. This step is often also referred to as the concept stage. — Select. Further develop business goals and functions into a PCSs scope defnition. This step often is part of the early portion of front-end engineering design (FEED). — Defne. Finalize PCSs scope defnition, select hardware and software, and prepare all applicable design drawings, specifcations, and procure other hardware and equipment. This step often forms the bulk of FEED. — Execute. Develop detailed design and procurement, construction/installation, checkout, testing, commissioning. — Operate. Commission, operate, and maintain. API 554 consists of three parts, each focusing on a major aspect of PCSs. The three parts and the areas that they cover are as follows. — Part 1, Process Control System Functions and Functional Specifcations. Covers the basic functions that a PCS may need to perform, and describes recommended methodologies for determining the functional and integration requirements for a particular application. — Part 2, Process Control System Design. Covers the hardware and software applied to PCSs and provides recommendations for implementation. Design considerations and references to design practices for control centers and other control system buildings and enclosures are also provided. — Part 3, Process Control System Project Execution and Ownership. Covers project organization, skills and work processes required to frst execute a process control project and then to own and operate a PCS. The portions of API 554 that deal with each phase of the life cycle are identifed in Table 1.
3 Terms and Defnitions The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any addenda) applies. 3.1 batch control Control functions that occur in a series of complex steps or phases that may combine continuous control, sequence control, and discrete control to execute a processing scheme. 3.2 commissioning The process of preparing a PCS and all of its components and feld instrumentation for operation after all loop testing and validation testing has been completed. 3.3 continuous control Control functions that are continuously and repetitively executed to control the values of process variables such as pressure, temperature, fow, etc. that are part of a continuous process such as a refning process, or within a portion of a process associated with a batch control system. 3.4 control loop That part of an instrument control system that includes the input sensor, transmitter, communication path, control algorithm, and fnal control element. Control algorithm may be executed as one of many such algorithms in a PCS or be performed by stand-alone electronic, pneumatic, or mechanical devices. 3.5 discrete control Control functions that involve on-of operations and interlocks. Discrete control variables are generally associated with thresholds above or below which a control action is taken. The control action is a discrete function such as opening or closing a valve, starting or stopping a motor, etc. 3.6 encryption The coding and decoding of data transmissions using algorithms and encryption keys that are known only to the sending and receiving devices. A wide variety of encryption techniques and algorithms are available and have varying levels of security associated with them.
3.10 feldbus A digital communication network that connects the feld sensors, transmitters, and control actuators together and to either a controller or control network. A feldbus network allows devices to send and receive messages over a shared path. Devices may send current measurements and/or diagnostic messages and receive commands or confguration data. 3.11 feld devices Any sensors, measuring devices, control elements, etc. that are used to sense or directly control process conditions. Current technologies allow increased “intelligence” to be added to the feld devices, e.g. self- diagnostics, control functions, and network interconnectivity. 3.12 frewall A combination of hardware and software installed on computers and network connections to prevent undesired messages from a digital network from reaching or passing through the computers. A frewall may also hide the presence of a computer from other computers on the network. 3.13 front-end engineering design FEED Engineering activities performed during the identifcation of project scope and costs. These activities are generally those necessary to develop designs to the point where scope and cost estimates can be supported. 3.14 human machine interface HMI A computing resource for a PCS that is used as an operator or engineering interface for displaying data or inputting information or operating commands. 3.15 local area network LAN A computer network connecting computers and other electronic equipment to create a communication system. These networks commonly use Ethernet or similar communications methods. 3.16 operability The characteristics of a PCS that allow the control system to be operated and maintained in a simple and reliable manner, but still provide all of the functionality and security required of the system.

Related PowerPoint Templates

Template Categories
Popular Tags