A large gas and electric utility uses coordinates internal to the corporation facilities to identify the location of equipment (fittings, valves, subsystems, pipe runs, compressors, etc.). Each piece of equipment or pipe run has a tag number associated with it. The tag number is used as a document ID for accessing various documents, such as the specification sheet, a drawing, a bill of materials, and an Operations and Maintenance manual for the item. The documents are filed numerically by tag number. The tag number is comprised of the following elements: the area number of the plant the system type (s = steam, o = oil, g = gas) the line number or system number it is located on a pipe size an item number (sequential number for the type of equipment starting with 1) Example: Tag # 170-G-221-8-1234 for Newport Gas Plant is: in plant area 170 a gas system (G) *gas line number 221 8 item #1234 1. Create tag numbers for the items listed below. The first number is shown as an example. a. b. c. d. e. E 101 107 Pipe run item #438 on 12" line number 44 in the Chillicothe Natural Gas Plant area Valve #623 on 4" line number 789 in the San Francisco Steam Plant area 447 Well fitting #651 on 8" well line number 66 in the San Francisco Oil Basin area 73 Valve #437 on 12" line number 44 in the Chillicothe Natural Gas Plant area 101 Pipe fitting #321 on 16" line number 1878 in the San Francisco Steam Plant area 637 Pipe fitting #652 on 4" line number 788 in the Chillicothe Natural Gas Plant area Valve #752 on 8" well line number 66 in the West Colorado Oil Basin area 77 2. h. Tag Numbers a. b. C. Line #702 on 4" well line number 833 in the West Colorado Oil Basin area 87 d. 101-G-44-12-438 4. Indicate the order in which documents with the tag number IDs should be filed using a location guide plan and an encyclopedic storage arrangement. File Order Primary Guide Secondary Guide Folder label Chillicothe Chillicothe Natural Gas Plant 101-G-44-12-437 San Francisco San Francisco Oil Basin San Francisco Steam Plant West Colorado West Colorado Oil Basin 3. Key an alphabetic index for the records. A sample entry is shown below. Alphabetic Index Indexed Name Location Area Line|Size Item Chillicothe Natural Gas Plant Chillicothe 101 44 12 437 Key a master index for the records. A sample entry is shown below. Master Index Location Indexed Name Area Line Size Item Chillicothe Chillicothe Natural Gas Plant 101 44 12 437