Dimensions that may be applied to the plug weld symbol include size, depth of filling, included angle of countersink, number of welds and their spacing (pitch). The size of a plug weld refers to its diameter in inches at the base of the weld. This dimen­sion is located to the left of the weld symbol, […]

The difference between the two welds, plug and slot, is in the shape of the hole in which the weld metal is deposited to fuse the two members of the joint. The plug weld is made through a round hole, and the slot weld is made through an elongated hole, Figure 15.1. Note that a […]

Several applications of the melt-thru symbol are shown in Figure 14.5 and Figure 14.6. In Figures 14.5(a) through (c), the melt-thru symbol is used with a groove weld. However, it can also be used for flange welds as in Figure 14.7(a) and (b). The melt-thru symbol is used in the same manner and has the […]

Back or backing and melt-thru welds are frequently used with groove welds to strengthen the weld on the opposite side of the joint. A back weld is distinguished from a backing weld only by its sequence of application with respect to the face side of the groove weld. In the case of a back weld, […]

Consumable inserts may be used in conjunction with single groove welds. The insert is a filler metal that is fused into the root of the joint and becomes a part of the weld. The symbol for indicating a consumable insert is a square shape _ _ and is located on the opposite side of the […]

A joint with a groove weld may include a requirement for back gouging. This opera­tion is the removal of base and weld metal from the other side of a joint that has been groove welded. It is performed to ensure that there will be complete penetration when welded from that side. When back gouging is […]

The length of a groove weld is specified by placing the dimension to the right of the weld symbol, Figure 13.7. The length and pitch (distance between centers) of intermittent welds are specified by placing the dimen­sions to the right of the weld symbol and are separated by a hyphen, Figure 13.8. The length and […]

The groove weld size is the depth of thematerial actually included and fused in theweld, Figure 13.4(a). If the weld is to have partial penetration,the dimension of both the groove size and thegroove weld size should be given. The weld-ing symbol shows these two dimensions tothe left of the weld symbol, Figure 13.4(b). They are […]

GROOVE WELD The eight types of groove welds are shown by symbols that indicate how the members are to be prepared and welded, Figure 13.1. In the J — and bevel groove welds, only one of the two members is chamfered or beveled. To indicate the member to be prepared for these welds, the arrow […]

The fillet weld symbol may be used in combination with other symbols, Figure 12.18. This is also true of many of the other weld symbols. Figure 12.18(a) shows the application of the fillet weld on the opposite (other) side of a square groove weld. Figure 12.18(b) shows the application of a FIGURE 1 2.1 8(a, […]