[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-668941-105":59,"doc-detail-668941-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","pid-symbols-isa-symbols-and-loop-diagrams","P&ID Symbols - ISA Symbols and Loop Diagrams","","Covers P&IDs (Piping and Instrumentation Diagrams) used in instrumentation and control to show how instruments are interconnected in a process. Explains the role of standardized ISA S5.1 symbol and identification letter conventions, including how tag numbers combine letters and digits to encode measured variables and component functions. Describes tag descriptors with examples and clarifies instrument location determination through the presence or absence of a line (no line, solid line), including typical mounting scenarios near the process or in control rooms.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/pid-symbols-isa-symbols-and-loop-diagrams/668941/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/pid-symbols-isa-symbols-and-loop-diagrams/668941.png","ImageObject",300,407,{"name":92,"@type":93},"8796093062539","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-03","2026-11-01",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is a P&ID used for in instrumentation and control?","Question",{"text":112,"@type":113},"A P&ID is used to help field techs, engineers, and operators understand the process and how instrumentation is interconnected.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does ISA S5.1 define tag numbers and tag descriptors?",{"text":117,"@type":113},"Tag numbers use letters and numbers placed near an instrument to identify the device type and function. The first letter designates the measured variable, while the succeeding letter(s) designate the component function or modify the meaning.",{"name":119,"@type":110,"acceptedAnswer":120},"How can you determine instrument location from the diagram?",{"text":121,"@type":113},"The presence or absence of a line indicates location: no line typically means the instrument is installed in the field near the process, while a solid line indicates mounting in the control room accessible to the operator; absence of accessibility is also described for out-of-sight placement.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},668941,1793521528,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":66,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},8796093062539,"P&ID SYMBOLS  \nISA Symbols and Loop Diagrams  \nP&IDs  \nPiping and Instrumentation Diagrams or simply P&IDs are the “schematics”used in the field of instrumentation and control (Automation)  \nThe P&ID is used to by field techs, engineers, and operators to better understand the process and how the instrumentation is inter connected.  \nMost industries have standardized the symbols according to the ISA Standard S5 .1 Instrumentation Symbol Specification.  \n• Piping & Instrumentation Drawing (original)  \n• Process & Instrumentation Diagram (also used)  \n• Process Flow Diagram – PFD (simplified version of the P&ID)  \nTemperature Process  \nUsing pictorial diagrams may be informative however it is not practical or CAD friendly especially in a multi-loop process.  \nTemperature Controller  \nand Recorder  \nSteam  ~~ ~~  \nPneumatic  \nControl Valve Heat Exchanger  \nTemperature Transmitter  \nBuilding the P&ID  \nThe P&ID will use symbols and circles to represent each instrument and how they are inter-connected in the process.  \nTemperature Controller  \nand Recorder  \nTemperature Transmitter  \nThermometer  \nTemperature Sensing Bulb  \nPneumatic  \nControl Valve  \nTag Numbers  \nTag “numbers” are letters and numbers  \nplaced within or near the instrument to identify the type and function of the device.  \nTT  \n206  \nTI  \n206  \nTag Descriptors  \nThe first letter is used to designate  \nthe measured variable  \nPressure Level Flow Temperature  \nThe succeeding letter(s) are used to designate the function of the component, or to modify the meaning of the first letter.  \nIndicator Recorder Controller Transmitter  \nTag Numbers  \nTag “numbers” are letters and numbers  \nplaced within or near the instrument to identify the type and function of the device.  \nFCV  \nTemperature Sensing Bulb  \nTT  \n206  \nTRC  \n206  \nTI  \n206  \nTemperature Recording Controller  \nTemperature Transmitter  \nTemperature Indicator  \nISA S5.1 Identification Letters  \nExamples  \nInstrument Location  \nThe presence or absence of a line determines the location of the physical device. For example no line means the instrument is installed in the field near the process.  \nX Y Z  \n123  \nNo Line  \nThe instrument is mounted in the field near the process,(close to the operator)  \nSolid Line  \nThe instrument is mounted in the control room (accessible to the operator)  \nNo Line  \nThe instrument is mounted out of sight (not accessible to the operator)","cbCainOGj7IrJUV0","https://ap.wps.com/l/cbCainOGj7IrJUV0","pdf",162436,18,"English","# P&ID Overview\n## Purpose of P&IDs\n## Relation to ISA Standard S5.1\n# ISA Symbols and Loop Diagrams\n## Building the P&ID with Symbols and Circles\n## Tag Numbers and Tag Descriptors\n## ISA S5.1 Identification Letters\n# Instrument Location Using Line Presence\n## No Line Mounting\n## Solid Line Mounting","[{\"question\":\"What is a P\\u0026ID used for in instrumentation and control?\",\"answer\":\"A P\\u0026ID is used to help field techs, engineers, and operators understand the process and how instrumentation is interconnected.\"},{\"question\":\"How does ISA S5.1 define tag numbers and tag descriptors?\",\"answer\":\"Tag numbers use letters and numbers placed near an instrument to identify the device type and function. The first letter designates the measured variable, while the succeeding letter(s) designate the component function or modify the meaning.\"},{\"question\":\"How can you determine instrument location from the diagram?\",\"answer\":\"The presence or absence of a line indicates location: no line typically means the instrument is installed in the field near the process, while a solid line indicates mounting in the control room accessible to the operator; absence of accessibility is also described for out-of-sight placement.\"}]","P&ID Symbols - ISA Symbols and Loop Diagrams | PDF",45]