line types in technical drawing

hulmes March 06, 2022 in , line , types Comment

Following are the different types of lines used in engineering drawing. I Visible outlines and edges Continuous thick lines type A ii Hidden outlines and edges Dashed line type E or F iii Cutting planes Chain thin thick at ends and changes of cutting planes type H iv Centre.

Engineering Drawing Wikipedia

The technical drawing must give a clear and precise idea of the exterior of the object represented and also of its interior characteristics.

. Fold Lines are lines used to represent an object flattened out into a 2D shape the bend lines are represented by long line and two short dashed line and then a long line again as shown on the left. In this followup to my first line types video I talk about a few more types of lines used in technical drawings. BS EN ISO 128-202001 Technical drawings.

In multiview projection the. Examples of this type of line can be seen in the movable jaw detailed drawing. Visible lines are the edges or outlines of an object.

If this angle is not 90 degrees this projection type is called oblique projection. It is used to. Centre Lines on Cylindrical Objects.

Figure 38 ISO 128 engineering drawing line type D but they are used for machine-generated. Simply put a technical drawing is a drawing that conveys information or instruction to the intended viewer. Centre lines are used to represent.

A hidden line. All other lines contrast with the visible lines by having either a thinner weight andor a combination of dashes. General principles of presentation.

Line weight is the thickness of the line. Drawing Line Types Weight. You can define your own but the British standards require that you add a key to your drawing to describe your custom line types meaning.

Construction lines and guide lines are very light easily erased lines used to block in the main layout. A center line is a 3 mm to 5 mm line that alternates between short and long dashes. Technical drawings are blue print style drawings that display a products information from dimensions like height width and depth to specified information such as materials or assembly details.

Thick lines are generally twice as wide as thin lines usually V32 inch or about. Line types are also a language type to communicate between technical people. A measuring area or a limit of heat-treatment.

Measure lines Backside section lines Implied axis lines to state the code of the planes at diagonal lines which are used to state plane surface Intersection Leader Hatching. This is achieved by applying cuts and sections. Technical drawings are used widely.

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. When a runs from top to bottom it is vertical. SECTION LINE Medium lines drawn at 45 degrees use to show interior view of solid areas of cutting plane line.

This video will help you to understand the difference between different types of lines used in technical drawing. They are drawn as solid lines with a thickheavy weight. The centre of circular.

These lines define the shape of the object portrayed. The ISO type K lines are thin discontinuous and chain dotted with a double dot as shown in. Once again you are free to make up your own line definitions but it is recommended that you put a note on the drawing with their meaning.

You should make the line so that end of the line ends with the long dash on both ends. Dimensions and tolerances can be illustrated on these types of projected drawings. The less hidden lines short strokes the drawing has the easier it will be to interpret.

A type Continuos Thick B type Continuous THIN C type Continuous THIN Freehand D type Continuous THIN Zig-Zag E type Dashes THICK F type Dashes THIN G type Chain Thin H type Chain THIN and THICK J type Chain. In parallel projection the angle between the projection plane and projector lines is 90 degrees. Within the branch of the technical drawing appears the line a fundamental characteristic of it important to illustrate the different objects.

Figure 3-7 These are common line types used in drawings to describe objects hidden conditions and important relationships between components and space. When a line moves from left to right direction it is horizontal. BS EN ISO 128-202001 Technical drawings.

Types of Lines in Technical Drawing Object Line. Figure 313 ISO 128 engineering drawing line type J Figure 313 ISO 128 engineering drawing line type J reason eg. Surroundings and sides of the matters Outlines of the Edges End of the Screws B.

The Line type definition numbers are my own. Object lines are solid heavy lines 7 mm to 9 mm. Drawings for interior design projects generally use three line widths.

BS 88882008 Technical product specification. Limit of interrupted view. PHANTOM LINE Long line followed by two short dashes use to show alternate position of a moving part.

Cut and section in basic drawing. Limit of interrupted view. When two lines dont meet each other at any point even at infinity then they are parallel.

Guide line It is used to indicate a. Types of Line Horizontal Lines. Figure 37 ISO 128 engineering drawing line type C ISO TypeD1 Line Thin zig-zag continuous Limit of section.

BS 88882008 Technical product specification. There are then different types of lines among the main ones are. In technical drawing a multiview projection type is generally used.

ORDER OF PRIORITY OF COINCIDING LINES When two or more lines of different types coincide the following order of priority should be observed. Thick dark medium and thin light. LEADER LINE Medium line with arrowhead to show notes or label for size or special information about a feature.

Technical Drawings Lines Geometric Dimensioning And Tolerancing Definition Of The Drawings Lines Iso Ansi Projected Two View Drawing