The pitch is the distance between centers of each weld segment (not the empty space between the segments; see Figure 2). When intermittent welds are placed on both sides of a joint, they can be directly opposite each other (chain) or they can be offset (staggered).
How far apart should welds be?
It is recommended that distance between two spot welds should be a minimum of 10 times the material thickness . Sufficient overlap of individual sheets being spot welded is necessary to obtain adequate joint strength and for use of standard electrodes.
What is a slot weld?
A slot weld joins the surface of a piece of material to another piece through an elongated hole . The hole can be open at one end and can be partially or completely filled with weld material.
How do you dimension a weld?
The dimensions of a weld may be added to a drawing in the following manner. Dimensions relating to the cross section of the weld are symbolized by b and are given on the left-hand side of the symbol. The cross-sectional dimension to be indicated for a fillet weld is the leg length.
What work angle is commonly used for welding a fillet weld?
A fillet weld has typically a notch opening angle of 135° resulting in a bisector plane inclination of 112.5° against the plate surface.
What is the minimum distance between two welds in a pipe?
The minimum distance between these two joints should be the one-time diameter of the pipe . So, if your pipe is 4′′ NPS the distance should be 4′′. If this is not possible, it should not be less than 11⁄2”.
What is the heat affected zone HAZ of a weld joint?
The HAZ is the area between the weld or cut and the base (unaffected) , parent metal. The HAZ area can vary in severity and size depending on the properties of the materials, the concentration and intensity of the heat, and the welding or cutting process used.
What are the 4 welding positions?
- Flat position. ...
- Horizontal Position. ...
- Vertical Position. ...
- Overhead.
What does the flag mean on a welding symbol?
5 Supplementary Welding Symbols. ... The symbol is a flag that will be at the junction of the arrow and reference line. This indicates that the part while may be assembled in a shop setting, its final welding procedures will be completed in the field during installation .
What is the difference between plug weld and slot weld?
To Create a Plug or Slot Weld. Use the same procedure to create a plug weld or a slot weld. The only difference is that a plug weld’s shape is defined by a diameter , and a slot weld’s shape is defined by a diameter and a length.
What is the pitch of the weld?
The pitch is the distance between centers of segments on one side of the joint . Intermittent fillet welds can be specified on both sides of a joint by placing a fillet weld symbol both below and above the reference line.
What does G mean in welding symbol?
When a finish symbol is used, it shows the method of finish, not the degree of finish; for example, a C is used to indicate finish by chipping, an M means machining, and a G indicates grinding . ... When this symbol is placed on a welding symbol, welds are to continue all around the joint.
What is the correct way to show weld all the way around?
Weld All-Around and Field Weld Symbols
Welds extending completely around a joint are indicated by the weld-all-around symbol (fig. 3-7). Welds that are completely around a joint that includes more than one type of weld, indicated by a combination weld symbol, are also depicted by the weld-all-around symbol.
What is the weakest plane in fillet weld?
For a given amount of weld material, the fillet weld is not as strong as due to the heavy concentration of the stress. ∴ For fillet weld, the weakest plane is along the throat section .
What are the three types of fillet weld?
Tee Joint, Lap Joint, and Corner Joint .
What are the two types of fillet weld?
There are two main types of fillet weld: transverse fillet weld and parallel fillet weld .
