What is the weld symbol?
The weld symbol distinguishes between the two sides of a joint by using the arrow and the spaces above and below the reference line. The side of the joint to which the arrow points is known (rather prosaically) as the arrow side, and its weld is made according to the instructions given below the reference line.
What is the difference between a weld symbol and a welding symbol?
The weld symbol indicates the type of weld and, when used, is a part of the welding symbol. Welding Symbol: The welding symbol consists of several elements (see Figure). Only the reference line and arrow are required elements. Additional elements may be included to convey specific welding information.
What do different weld symbols mean?
Welding symbols are used to communicate between the designer and the welder. The arrow and leader line point to the joint in question, while the weld symbol tells you what type of weld to do. If the weld symbol is below the reference line (such as in symbol 1), the weld should be made on the same side as the arrow.
What are the 3 main components of a weld symbol?
Elements of a Welding Symbol
- Reference line.
- Arrow.
- Basic weld symbols.
- Dimensions and other data.
- Supplementary symbols.
- Finish symbols,
- Tail,
- Specification.
Why are welding symbols used?
Weld symbols are how the designer of a custom metal form communicates how objects should be welded to welders working the manufacturing line. Without clearly-marked weld symbols, the welder won’t know where to place a weld, what type of weld should be made, and the weld size.
What does flag on weld symbol mean?
A flagpole indicates a field weld, which simply means the weld is to be made on site, rather than in the shop. The symbol consists of a flag that is placed at the intersection where the end of the reference line meets the arrow.
What are the main parts of the welding symbol?
There are two parts that make up the main body of a welding symbol. These include the reference line and the arrow. The horizontal line that makes up the main body is called the reference line. This is the anchor to which all the other welding symbols are tied.
What is the basic element of a welding symbol?
Arrow
Arrow. The arrow is the fundamental element of a welding symbol. It’s an essential part of the welding symbol and points to the joint to be welded. The side to which the arrow points on the joint is defined as the “arrow side,” while the opposite is referred to as the “other side.”
What are the 4 types of welding?
There are four main types of welding. MIG – Gas Metal Arc Welding (GMAW), TIG – Gas Tungsten Arc Welding (GTAW), Stick – Shielded Metal Arc Welding (SMAW) and Flux-cored – Flux-cored Arc Welding (FCAW). We dive deeper into each type of welding here.
What is bevel weld?
Bevelling is the process of preparing metal to be welded, usually by cutting an angled slope on the edge of the metal. In pipe welding bevelling is an integral part of the engineering process. Two pipe ends due to be welded together have their shapes altered by removing some of the metal from each end.
What is melt through weld?
Melt-through is caused when the welding from one side melts through the base metal to the other side of the joint.
What does the G MEAN on a welding symbol?
For example the following letters are used to convey this information on a symbol: For example there is a G, as shown below, so the welder needs to grind the weld to create the contour that is needed, and the actual contour is to be ‘flush’. This means that the weld needs to be ground down so that it is flush with the base metal.
How does gas metal arc welding ( GMAW ) work?
Gas Metal Arc Welding (GMAW) is a welding process which joins metals by heating the metals to their melting pointwith an electric arc. The arc is between a continuous, consumable electrode wire and the metal being welded. Thearc is shielded from contaminants in the atmosphere by a shielding gas. GMAW can be done in three different ways:
Is the melt through symbol omitted from welding symbols?
There is not always a root opening and this dimension can be omitted from the welding symbol. It is common to put a root opening on a part to ensure complete penetration or even melt through. The melt through symbol is included in supplementary welding symbols. Grooves that associate with U and J preparations are a rather special weld.
What are the numbers on the GMAW electrodes?
GMAW (MIG welding) electrodes are designated by some letters and numbers such as ER70S-6, ER90S-6 and E308L etc. I will explain the meaning of these symbols: