Welding Construction Lines

Welding Construction Lines: Welding Symbols a. Full Lines (A, fig. 3-1). Full lines represent the visible edges or outlines of an object.  b. Hidden Lines (A, fig. 3-1). Hidden lines are made of short dashes which represent the hidden edges of an object. c. Center Lines (B, fig. 3-1). Centerlines are made with alternating short and long dashes. … Read more

Welding: Butt Joints

In welding, butt joints are used to join the edges of two plates or surfaces located in approximately the same plane. Plane square butt joints in light sections are shown in figure 6-17. Grooved butt joints for heavy sections with several types of edge preparation are shown in figure 6-18. These edges can be prepared by flame cutting, shearing, flame … Read more

Elements of a Welding Symbol

A distinction is made between the terms “weld symbol” and “welding symbol”. The weld symbol (fig. 3-3) indicates the desired type of weld. The welding symbol (fig. 3-2) is a method of representing the weld symbol on drawings. The assembled “welding symbol” consists of the following eight elements or any of these elements as necessary: … Read more

Welding Construction Lines: Welding Symbols

a. Full Lines (A, fig. 3-1). Full lines represent the visible edges or outlines of an object.  b. Hidden Lines (A, fig. 3-1). Hidden lines are made of short dashes which represent the hidden edges of an object. c. Center Lines (B, fig. 3-1). Centerlines are made with alternating short and long dashes. A line through the center … Read more

Basic Weld Symbols

Weld symbols are used to indicate the welding processes used in metal joining operations, whether the weld is localized or “all-around”, whether it is a shop or field weld, and the contour of welds. These basic weld symbols are summarized below and illustrated in figure 3-3. Arc and Gas Weld Symbols See figure 3-3. Resistance Weld Symbols See figure … Read more

Welding: Edge Joint

This type of joint is used to join two or more parallel or nearly parallel members. It is not very strong and is used to join edges of sheet metal, reinforcing plates in flanges of I beams, edges of angles, mufflers, tanks for liquids, housing, etc. Two parallel plates are joined together as shown in view … Read more

Types of Welds

Types of Welds. It is important to distinguish between the joint and the weld. Each must be described to completely describe the weld joint. There are many different types of welds, which are best described by their shape when shown in cross-section. The most popular weld is the fillet weld, named after its cross-sectional shape. … Read more