Welding Symbols – Explained Basis Symbols with Chart and Diagram

You might be searching to know that how to recognize the welding symbols and what type of message they portray. You may have searched a lot but all went in vain, don’t worry because we revive you. In this regard and to answer the questions, we have this productive article. Let us go through it for better comprehension of weld symbols.

From the very beginning, we have a horizontal line that is also called a reference line. This line is the basis of all the symbols. So, it is compulsory to keep it in mind while reading this article. After that, there is an Arrow line for the welt that goes left to right and the tail would for additional information.

Summary of the weld symbols

To sum up, you can name them the basics of welding symbols:

  • Reference line
  • Arrow
  • Basic weld symbols
  • Dimensions and other data
  • Supplementary symbols
  • Finish symbols
  • Tail
  • Specification
  • Process, or other references

Without these symbols, it is difficult to work effectively. The diagram on the weld letter makes us able to have a clear understanding of them.

Basics of weld symbols

The basic portion carries the understanding of the welding process. It explains the metal joining process and how all goes in the right direction. Further, the induction, arc and gas symbols, brazing, and forge thermit comes under the umbrella of the basics of welding symbols. Reference line from left to right helps us indicate them easily. Later on, the three weld symbols represent a square, fillet, and V-groove weld. After that, above the reference line, the weld symbol is placed as compared to placing below it because this placement is worthy.

Welding Chart

The welding chart also symbolizes things clearly and helps us determine how to use them. We will present you with a welding chart. Give it try and get the answers to your questions.

welding symbols
basis welding symbols

Types of welding symbols

The types of weld symbols help recognize the operations of welding, location, measuring different dimensions, and primary information. A lot of symbols are being used in the welding table, web and trade.

Further, we can go having knowledge about cutting processes and identification of the filler metal. To get more about weld types, let us dive in.

⦁ Plug welds and slot welds

These two types of welds are mainly taken into usage to join overlapping members, one of which has holes (round for plug welds, elongated for slot welds) in it. Weld metal is deposited in the holes and penetrates and fuses with the base metal of the two members to form the joint. For further clarifications, the plug welds, the diameter of each plug is put to the left of the symbol, and the plug-to-plug spacing is put to the right.

On the flip-side, the slot welds carry each slot is given to the left of the symbol, the length and pitch, and the difference would be of slash that is given to the right of the symbol, and a detailed drawing is referenced in the tail.

You need to keep in mind that the arrow-side and other-side designations display that piece contains the hole(s). Remember that if the hole does not get proper fulfillment with weld metal, the depth to which it is to be filled is given within the weld symbol.

⦁ Flare bevel groove weld

If you have been looking forward to joining a round or curved piece to a flat piece, the flare bevel groove weld meets the objectives perfectly. With the inclusion of the flare-V, the depth of the groove formed by the two curved surfaces takes all the sides to the true direction. Most noteworthy, the weld symbol’s perpendicular line is always drawn on the left side, regardless of the orientation of the weld itself. The mig welder for home use, this is commonly seen in it.

⦁ J-groove welding symbols

The edge of one of the pieces is given a concave treatment and the other is left square. It is to the U-groove weld what the bevel groove weld is to the V-groove weld. As with the bevel, the perpendicular line is always drawn on the left side and the arrow (with a break, if necessary) points to the piece that receives the edge treatment. Depth of edge treatment, effective throat, and separation at the root are described using the methods discussed in the V-groove section.

⦁ Bevel groove welds

One piece of the weld carries two different dimensions in the form of chamfered and the second one is the left square. The bevel symbol’s perpendicular line is always drawn on the left side, instead of the orientation of the weld.

The arrow in the piece gives directions toward the piece that is to be chamfered and in that scenario, the extra significance is given to break in the arrow line. Further, the angle and depth of edge treatment, effective throat, and differentiation at the stem are described using the ways discussed in the V-groove section.

⦁ Cutting letters

The cutting letters have also a remarkable place in the symbolization of the welding process. You might have observed and seen them in different welding blueprints. To determine and know all types of cutting, we go with the cutting process and letter designation.

  • Arc cutting AC
  • Air carbon arc cutting AAC
  • Metal arc cutting MAC
  • Oxygen cutting OC
  • Chemical flux cutting FOC
  • Metal powder cutting POC
  • Arc oxygen cutting AOC

While going through the cutting process, the letter designations are assistive and portray the ideas in a short way. Moreover, you would have to keep in mind that the letter designations don’t have interconnection with arc spot, resistance spot, arc seam, and projection welding.

Final verdict on Welding Symbols

To sum up, we have clearly defined the purpose of having knowledge and the basic if field weld symbols. The well-research and explained four types of welding symbols fully depict the overview of symbols in a very clear way.

The availability of the chart shows the letter designations, the reference, and tails for clear understanding. The welding drawings in the chart we presented are, of course, helpful. So, it is now in your hands to take this initiative and comprehend these welding symbols.

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