It is used to provide engineering requirements for a purchased item. Internals of equipment are shown in PFD only if required for a clear understanding of the working of the equipment. required to mount assemblies in next higher assemblies or on foundations are included in the parts list of the drawing which define the attachment (usually the higher level assembly or installation drawing). It is not normally used to control design. ), or such semi-processed items as blank panels, castings, and electronic equipment drawers etc. A multi detail drawing is to be used cautiously. Horizontal 3. It will take less then a minute, Technological and other processes/equipments associated with steel industry, Management in steel plant along with training and development, Raw materials and other materials used in steel plants, Role of Leadership in the Management of Organizations, Role of Communication in the Organization, Shape Control Technologies in Hot Strip Mill. Drafting students or those reading the drawings have to learn what they mean, just as one learns a new language. Curved You can make a variety of lines using these tools: 1. Structural drawings are primarily concerned with the load-carrying members of a structure. which affect the physical or functional characteristics of the co-functioning items, and (iii) any other characteristics which cannot be changed without affecting system interfaces. It includes (i) connections of major elements of a circuit represented by single line graphic symbols, (ii) the course of the main circuits (connection of major components) shown in the most direct path and logical sequence, and (iii) electrical characteristics which are essential to an overall understanding of the system. Gesture lines 5. Parallel or cross-hatching 4. The drawing type permits the required alteration to be performed by any competent manufacturer including the original manufacturer, the altering design activity, or a third party. Identification 2. A Dimension is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part. The mechanical schematic diagram depicts mechanical and other functional operation, structural loading, fluid circuitry, or other functions using appropriate standard symbols and connecting lines. Structural detail fabrication drawing includes all the details needed for the fabrication of the structures. In this case, the drawing is prepared by placing the plane parallel to the inclined surface. It includes (i) pictorial views, (ii) a wiring tabulation or reference to a wiring list which identifies wire numbers or colour codes, circuit reference designations, wire lengths, wire type and gauge, termination methods, and other related data, (iii) instructions for fabrication of the harnesses, minimum bend radii for conductors, and cross-references to the using assembly or installation drawings and associated electrical diagrams, (iv) parts list specifying parts (connectors, terminal lugs, etc.) It does not necessarily show physical relationship. It depicts the electrical connections and functions of a specific circuit arrangement without regard to the physical shape, size, or location of the elements. A mechanical schematic diagram symbolically depicts elements of the unit, assembly, or system involved and displays the relation of each element by interconnecting lines. Loading diagrams for hoists and slings, flow diagrams for hydraulic or pneumatic control valves, and simple unit flow diagrams, etc. Texture Use this line knowledge to your advantage! Depiction of the items in the assembly relationship, using sufficient detail for identification and orientation of the items. are normally given in a tabular form on the drawing usually on the right side or bottom of the drawing. The use of a right type of line results in a correct drawing. Reference dimensions are to be included in GA drawing. Top Answer. Requirements for decorative or protective finishes, processes, settings and adjustments, and other relevant data necessary to complete the item as an assembly. These are described below. LINES. Texture 5. Cross-reference to applicable installation drawings, wiring lists, schematic diagrams, test specifications, and associated lists, A unique identifier assigned to each assembly configuration. The same revision status applies to all details on a multi detail drawing and hence a change to one detail of the drawing can affect the associated records of all other details (material control data, manufacturing planning, and microfilm etc.). Technical drawing is normally accepted as legal document and is frequently being used for regulatory approvals. Lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. and process requirements for connections, (v) reference to associated assembly drawing, connection diagram, interconnection diagram, or wiring harness drawing. It includes (i) dimensions and tolerances for overall length and breakout locations, (ii) identification of parts, bulk materials, and processes required for fabrication of the cable assembly, (iii) preparation of the cable ends, (iv) orientation and offset of connectors, (v) maximum diameter of cable, (v) minimum bend radii for wiring within the assembly, (vi) detail views of moulded areas, (vii) conductor lay patterns, (viii) identification band or other marking requirements, (viii) a wiring list, wiring diagram, or schematic diagram, (ix) finish, special assembly, and/or storage instructions and (x) test requirements. google_ad_height = 250; Technical drawings are also known as ‘engineering drawings’. It is prepared to (i) illustrate logic functions, and (ii) facilitate circuit analysis and diagnosis of equipment problems. Structural drawings are of three types namely (i) design drawings, (ii) detail fabricating drawings, and (iii) erection drawings. It provides design details and establishes item identification for the computer program. It is a design information drawing. A ‘general layout drawing’ is normally prepared in plan-view. Sometimes the technical information conveyed by a drawing can best be shown by a view thatrepresents the object as it would look if part of it were cut away. A multi detail drawing defines two or more uniquely identified parts in separate views or in separate sets of views on the same drawing. When an observer is viewing a … A detail drawing establishes item identification for each part depicted thereon. It includes (i) location identification and termination methods for each end of wire, (ii) a description of each wire (e.g. It is prepared to show the interconnections between units, sets, groups, and systems. The fourth category of control drawing is the design control drawing. The layout drawing is prepared either as (i) a conceptual design layout to present one or more solutions for meeting the basic design parameters and to provide a basis for evaluation and selection of an optimum design approach, (ii) a design approval layout to present sufficient details of the design approach for cost estimating and design approval, (iii) a detailed design layout drawing depicting the final development of the design in sufficient detail to facilitate preparation of detail and assembly drawings, (iv) a geometric study to develop movement of mechanical linkages, clearances, or arrangements. clouds in daylight) and line figures, then it is preferred to use hard pencils. They establish requirements for assembly and test. ), (iii) rigging instructions, and (iv) critical structural items to display loading or lifting data. in simplified form. They are generally prepared or printed in standard size of paper. It is prepared to provide maximum clarity in defining the part. 5 Figure 5: Example of technical & engineering drawing that uses 6 different types of lines Figure 6: Drawing that shows various types of lines 6. It fully describes and locates all reinforcements in relation to the finished surface of the concrete and to any holes or fixings. Style Other types of lines are defined by the technique you are using: 1. A dimension line which is a type B line (thin, continuous and straight). I guess like any type of technical drawing you need to have an understanding of what device you’re trying to illustrate, its functions, and the space creators need to understand while assembling. However, small electrical items mounted by wire connections only may be located either by depiction on the assembly drawing or inclusion in the pertinent wiring list or connection diagram. If the drawing consists of lighter subjects (e.g. This pencil type is great for any technical work that involves making lines that are easily erasable. It discloses the basic technical information and performance requirements necessary for a contractor to complete the detailed design required to develop and produce an item. A master drawing provides the complete engineering description of a printed board which includes (i) all dimensions and tolerances necessary to establish board size and shape, mounting hole locations, cutouts, and hole sizes, etc., (ii) un-dimensioned holes located by the conductor pattern and at theoretical grid intersections, (iii) minimum annular rings for conductor patterns surrounding terminal holes to control both hole-to-terminal relationship and registration between layers, (iv) minimum conductor width, spacings, and distance to board edges, (v) registration marks to assure proper alignment of patterns and marking masters on two-sided and multilayer boards, (vi) definition of the cross section details of multilayer boards, (vii) dielectrics thickness between layers of multilayer boards, (viii) raw materials and plating requirements, (ix) etch back allowances, (x) reference designation marking, (xi) maximum rated voltage, (xi) identification and traceability marking requirements, (xii) test points, (xiii) test tab requirements, (xiv) the shape and arrangement of conductor or circuit patterns, hole locations, and printed marking requirements, (xv) critical pattern features which may affect circuit performance, (xvi) views of  conductor or circuit patterns and printed marking requirements, (xvii) applicable process specification, and (xviii) process allowances used in preparing the artwork master. It identifies the master source code, object code, or both, for the computer program in human readable form. The drawing is usually prepared to the scale with building dimensions. A selected item drawing is prepared when it is feasible to select from an existing group of existing items those items which (i) meet the required characteristics for a particular application, and (ii) pass additional tests or inspections imposed by the using design activity for characteristics not normally specified for the original item. It depicts physical and functional interfaces of related or co-functioning items. Control drawing is that drawing which is used for the control of certain activities. 3H All the best Types Of Lines In Art Drawing 34+ collected on this page. Those informations which cannot be given in the plan and sections view such as material specification, tolerances, and bill of materials etc. The fourth type is connection diagram or wiring diagram. In Technical Drawings, Lines are used for the interpretation of drawings by the technical people involved. It includes (i) physical relationship of circuit elements and their connections, (ii) items identified by reference designations, (iii) clearly identified terminal arrangements, (iv) wires numbered for reference, and (v) wire and termination descriptions. Electrical and electronic diagrams depict the elements or functions of electrical or electronic items using standard symbols and connecting lines or data in tabular form. The diagram below shows the various types of line, their description and general application: 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Three types of drawings are generally used. It is prepared to describe power, signal, radio frequency, audio and general purpose electrical cable assemblies including both single-run and branched cables. The thickness of the lines must be chosen according to the type and size of the drawing from any of the six groups given in Table 1. Movement 5. An altered item drawing includes (i) information necessary to identify the existing item prior to alteration, including the original item identification, (ii) complete details of the alteration, (iii) a unique identifier assigned to the altered Item, (iv) re-identification marking requirements, and a parts list when the alteration necessitates any additional items to produce the altered item. It consists of a parts list which identifies the computer programs and applicable notes. Technical Drawings and their Types. Heavy Lines are lines used to show the outline of the object you are drawing. A two-point perspective is one of the most widely-used perspective drawings, as it gives a very realistic feel to the sketch. 1.2 Types of Lines: Usually lines created are all of the same thickness and type, but lines on an engineering drawing signify more than just the geometry of the object, and it is important that appropriate line type is used in the right place, because each gives different meaning. Section :3: Line types -identification PURPOSE In this section you will be able to recognise and interpret different line types, and the need for variation in thickness used on engineering drawings. The Line type definition numbers are my own. It is prepared either as a wiring type diagram which shows each wire, or as a cabling type diagram which primarily shows cables but can also include wires. This information includes dimensional data, hardware descriptions, and general configuration information for the installation site. 3 4 5. It includes (i) physical or functional mating characteristics of the matched items (set), (ii) unique identifier assigned to each of the parts and to the matched set, and (iii) discrete identification marking of the matched set. An altered item drawing describes the physical alteration of an existing item under the control of another design activity. The seventh type is the logic circuit diagram. It shows internal connections, but may include external connections which have one termination inside and one outside the assembly. o Line Thickness It is a single drawing prepared to describe parts usually related to one another. These are (i) computer program listing drawing, (ii) computer program assembly drawing, and (iii) computer program set drawing. The drawing specifies the media materials, marking requirements, and the applicable specifications. Width 3. It is prepared when the required dimensions, tolerances, or other characteristics of items can only be specified in terms of the matched relationship. L. It provides criteria for performance, acceptance, and identification of supplier items by disclosing the engineering design characteristics required normally for control of interfaces and to ensure repeatability of performance. Create your account. and bulk materials required for the fabrication of the harness, and (v) applicable processes. There are usually six categories of control drawing (Fig 1) as given below. A layout drawing depicts design development requirements. The assembly drawing normally includes the following. A line can be a straight or a curve, they must have a specific starting point and an endpoint, and may be with or without interruption through his. It is prepared to establish the physical and functional characteristics necessary to ensure microcircuit interchangeability. This includes items which are interchangeable only as a set because of special requirements for machining, electrical characteristics, performance, etc. It includes (i) mathematical equations for the geometric features, (ii) tabulated coordinates, (iii) graphic sections, and (iv) a summary of features and relationships to more basic coordinate systems in appropriate combinations to define the contoured surface or the desired points on a contoured surface. Diagonally crosses the flat surfaces characterize, Bending lines (with tubes and machined parts), Umrahmungsen (from Prüfmaßen/Form- and position tolerances and details), Drawing of views and limitations interrupted cuts (drawn freehand), Drawing of limitations interrupted views and slices (with automatic character Signed), Identification of division lines in the form of cuts, Identification of limited areas, e.g. The wiring list is a form of connection or interconnection diagram. It is an administrative type drawing which assigns unique identifiers which are compatible with automated data processing systems, item identification specifications, and provides a cross reference to the original incompatible identifier. type, size, and colour etc. It establishes item identification for the set. Technical drawings are most frequently used to establish engineering requirements. Asked by Wiki User. A pipe bend drawing establishes, by pictorial or tabular description or a combination thereof, end product definition for a single, multi-plane, pipe or pipe assembly along with the identification for the bent pipe or pipe assembly. Special application drawings are of several types. The structural drawings guide in detailing, fabricating, and installing parts of the structure. It can be prepared for any level of assembly and can include one or more levels. This is particularly because 2H contains a very light amount of lead. It is prepared to describe items which can be fabricated by use of the patterns to produce the item or to produce a tool for use in fabricating the item. It establishes item identification for the controlled items. It is the preferred drawing type for an inseparable assembly. They are design information drawings. A contour definition drawing contains the mathematical, numeric, or graphic definition required to locate and define a contoured surface. It is prepared when it is desired to identify all of the items required to perform a specific operation in kit form. looking at the drawing. The GA drawing does not establish item identification. It is normally prepared for one or more related assemblies. It contains the details necessary to make or trace connections involved. These lines are drawn by leaning on your pencil a lot harder than when drawing construction lines but not hard enough to crack the pencil point. It is prepared as either a detailed or simplified drawing. The sixth category of control drawing is the identification cross reference drawing. The drawing is prepared to add, remove, or rework items to satisfy the user’s requirements or to incorporate mandatory changes in delivered equipment. It is prepared to define complex surface geometry which cannot be conveniently included in the detail drawings of an item. An un-dimensioned drawing represents the shape and other design features of an object at a precise scale predominantly without dimensions. This drawing discloses sufficient information to ensure identification and re-procurement of interchangeable items. It includes (i) a parts list of the contents of the kit including the identification of each item, (ii) documents which are a part of the kit, (iii) pictorial representations, (iv) special tool requirements for installation of the kit, and (v) retest or recalibration requirements. Complex technical drawings were made in renaissance times, such as the drawings of Leonardo da Vinci.Modern engineering drawing, with its precise conventions of orthographic projection and scale, arose in France at a time when the Industrial Revolution was in its infancy. The rules for lines in technical drawings are in the ISO 128-20 described. However, a detailed layout drawing is sometimes used for this purpose. Technical drawing has existed since ancient times. satyendra; March 8, 2017; 4 Comments ; Assembly drawing, Civil drawing, control drawing, Engineering drawing, GA drawing, piping and instrument drawing, process flow diagram, schmatic diagram, single line diagram, structural drawing, Technical drawing, wiring list,; Technical Drawings and their Types. It establishes new item identification for the altered item. A wiring harness drawing specifies the engineering requirements and establishes item identification for a wiring harness (a group of individually insulated conductors, including shielded wires and coaxial cables, held together by lacing cord or other binding). The second category of control drawing is the vendor Item drawing. A selected item drawing defines refined acceptance criteria for an existing item under the control of another design activity which requires further selection, restriction, or testing for such characteristics as fit, tolerance, material (in cases where alternate materials are used in the existing item), performance, reliability, etc., within the originally prescribed limits. Line types are also a language type to communicate between technical people. Normally a standard set of symbols is used to prepare drawings of processes. (adsbygoogle = window.adsbygoogle || []).push({}); Except a few category of drawings (e.g. They describe typical applications and minimum content requirements. A structural drawing is a type of technical drawing which depicts the design and working drawings for building as well as technological structures. Technical drawing is a language of lines, quite literally because the reader of the drawing needs to rely on the fact that every line on the object visible as an edge is shown unless clearly stated, so if something is missing it throws the sense out and introduces doubt. The fifth category of control drawing is the interface control drawing. Implied lines And their 5 functions are: 1. A PFD normally comprise of but not limited to (i) all the process lines, utilities and operating conditions essential for material balance and heat and material balance, (ii) utility flow lines and their types which are used continuously within the battery limits, (iii) equipment diagrams to be arranged according to process flow, designation, and equipment number, (iv) simplified control instrumentation pertaining to control valves and the likes to be involved in process flows, (v) major process analyzers, (vi) operating conditions around major equipment, (vii) heat duty for all heat transfer equipment, (viii) changing process conditions along individual process flow lines, such as flow rates, operating pressure and temperature etc., (ix) all alternate process and utility lines operating conditions, and (x) material balance table for essential streams. Type of lines is a form of language communication between technical individuals. They are prepared either manually or with the aid of computer. The projection lines for the hole-centre spacing dimension of 32mm are centre lines. It depicts the functions of the major elements of a circuit, assembly, and system etc. The erection drawing is prepared to provide detailed installation information for (i) functionally related items (such as a control system, electrical system, or hydraulic system) which cannot be effectively shown on an assembly drawing of the item to which it belongs, or (ii) a part or assembly which is so large or complex that the major assembly drawing cannot accommodate all relevant data. For general engineering drawings, the types of lines recommended by the Bureau of Indian Standards shown in table 2 must be used. The assembly drawing is prepared for each group of items which are to be joined to form an assembly and that reflect one or more of the (i) a logical level in the assembly or disassembly sequence, (ii) a testable item, (ii) a functional item and (iv) a deliverable item. Section Lines. Where an assembly drawing contains detailed requirements for one or more parts used in the assembly, it is a detail assembly drawing. In this followup to my first line types video, I talk about a few more types of lines used in technical drawings. Please read on Lines in Mathematics here. An… A kit drawing identifies an item or group of items with instructions for their use. A modification drawing is not a substitute for existing drawing types used to produce the item prior to modification. The fifth type is the interconnection diagram. Organization 4. The Bureau of Indian Standards has prescribed the types of lines in its code IS-10714-1983 to be used for making a general engineering drawing. Engineering changes are incorporated into the latter drawing types to the extent that future production is to reflect the modifications. It provides sufficient engineering definition for acceptance of interchangeable items within specified limits. They are of following types. It is prepared to show the connection of wires and circuit elements at any level of assembly or installation. 2012-04-20 02:02:58 2012-04-20 02:02:58. google_ad_client = "ca-pub-7057920448327527"; Technical drawing Lines are used for different purposes to provide specific information for designers, manufacturers, etc. It is prepared to show the detailed design of a circuit and to assist in tracing the circuit and its functions. It is used to provide a means of establishing engineering requirements for the selection, qualification testing, and acquisition of an item, and documentation to assure interchangeability of specified items. required to produce the object code from the source code is also specified. They do not address architectural details like surface finishes, partition walls, or mechanical systems. These lines … The process of producing technical drawings, and the skill of producing those, is often referred to as ‘drafting’. It consists of tabular data and instructions necessary to establish wiring connections. Thin lines for outlining. Vertical 2. This video will help you to understand the difference between different types of lines used in technical drawing. Electrical items depicted as they are to be mounted. Clarity is the essential aspect of the technical drawings. Here is a list with different line types and their application: If you are a beginner in technical drawing, you will see the stichpunktartigen information on the cases of application of different line types is not very anschlaulich be. They outline the size and types of materials to be used, as well as the general demands for connections. A line can be a straight or a curve, they must have a specific starting point and an endpoint, and may be with or without interruption through his. Technical drawings carry a ‘title block’ in the right bottom corner for their identification. A microcircuit drawing specifies the engineering requirements and establishes item identification for a microcircuit. Reinforcement drawing is part of civil drawing. The basis of any drawing is a line. They describe three-dimensional objects through the medium of two-dimensional paper. Enter your e-mail address and your password. An introduction to the styles and importance of technical drawing Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A cable assembly drawing depicts an electrical cable assembly of defined length and establishes item identification for that assembly. A PFD normally does not include (i) minor process lines which are not usually used in normal operation and minor equipment, such as block valves, safety/relief valves, etc.

types of lines in technical drawing

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