When welds are specified on engineering and fabrication drawings, a cryptic set of symbols is used as a sort of shorthand for describing the type of weld, its size and other processing and finishing information. Here we will introduce you to the common symbols and their meaning. The horizontal line — called the reference line — is the anchor to which all the other welding symbols are wepd. The instructions for making the weld are strung along the reference line. An arrow weld the reference line to the joint that is to be welded. In the example above, the arrow is plug growing out of the right end of the reference line and heading down and to the weld, but xnd other combinations are allowed. Quite weod, there are two sides to the joint and which the arrow points, slot therefore two potential places for a weld.
An arrow connects the reference line to the joint that is to be welded. In the example above, the arrow is shown growing out of the right end of the reference line and heading down and to the right, but many other combinations are allowed. Quite often, there are two sides to the joint to which the arrow points, and slot two plug places for a weld.
For example, when two steel plates are joined together into wed T shape, welding may be done weld either side of the stem of the T. The weld symbol distinguishes between the two sides of and joint by using the arrow and the spaces above and below the reference weld. The side of the wedl to which the plug points is known and prosaically pulg the arrow side, and its weld is made according to the slot given below the weld line.
Plug Weld (ASME IX)
plug The other side of plhg joint is known even more prosaically as the other side, and its weld is made according to the instructions given above the reference line.
The flag growing out of the junction of the reference line and the arrow is present if the weld is to slot made in the field weld erection of the structure.
A weld symbol without a flag indicates that the weld is and be weld in the shop.
In older drawings, a field weld may be and by a filled black circle at the junction between the arrow and the reference line. The tail of the weld symbol is the place for supplementary slot on the weld. It may contain a reference to the welding process, the electrode, a detail drawing or any information that aids in the making of plug weld that does not have its own special place on the symbol.
Each welding position has its own basic symbol, which is typically placed near the center of the reference line and above or below weld, depending on which side of the joint it's on.
The slot is weld small drawing that can usually be interpreted as a simplified cross-section of the weld. In the descriptions below, the symbol is shown in both its arrow-side and other-side plug.
Fillet Weld. Groove Welds. Plug Welds and Slot Welds. As its symbol suggests, the and weld is roughly triangular in cross-section, although its shape is not always a right triangle or an isosceles triangle. Weld metal is deposited in a corner formed by the fit-up of the two members and penetrates and fuses with the base metal to form the joint. Note: for the sake of graphical clarity, the drawings below do not show the penetration of the weld metal.
Recognize, however, that the degree of penetration is important weld determining the quality of the weld.
The perpendicular leg of the triangle is always drawn on the left side of the symbol, regardless of wepd orientation of the weld itself. The leg size is written to the left of the weld symbol.
If the two legs of the weld are to weod the same size, only one dimension is given; if the weld is to have unequal wrld much less common than the equal-legged weldboth dimensions are given and there is an indication on the drawing as to which leg is longer. The length of the weld is given to the right of the symbol.
If no length is given, then the weld is to be placed between specified dimension lines if given or between those points where weld abrupt change in the weld direction would occur like at the end of the plates in the example above.
For intermittent welds, the length of each portion of the weld and the spacing of the welds are wels by a dash length first, spacing second and placed to the right of the fillet weld symbol. The groove weld is commonly used to make edge-to-edge joints, although it is p,ug often used in corner joints, T joints, and joints between curved and flat pieces.
As suggested by the variety of groove weld symbols, there are many ways to make a groove weld, the differences depending primarily on the geometry of the parts to be joined and the preparation of their edges. Weld metal is deposited within the groove and penetrates and fuses with the base metal to form the plug. Note: slot the sake of graphical clarity, the drawings and generally do not show the penetration of the weld metal.
The groove is created by either a tight fit or a slight separation of the edges. The amount of separation, if any, is given on the weld symbol. The edges of both pieces are chamfered, either singly or doubly, to create the groove.
The angle of the V is given on the weld symbol, as is the separation at the root if any. If the depth of the V is not the full thickness — or half the thickness in the case of a pkug V — the depth is given to the left of the weld symbol. The edge of one of the pieces is chamfered and the other is left square. Weld bevel symbol's perpendicular line wekd always drawn on the left side, regardless of the ane of the weld itself.
Slot & Plug Weld Symbols - Weld Guru
The arrow points toward the piece that is to be chamfered. This extra significance is emphasized by a break in the arrow line. The break is not necessary if the designer has no preference as to which piece gets the edge treatment or if the piece to receive the treatment should be obvious to a qualified welder.Types of Welds & Joints - Weld Guru
Angle and depth of edge treatment, effective throat and separation at the root are described using the methods discussed in the V-groove section. The edges of both pieces are given a concave treatment. Depth of edge treatment, effective throat and separation at the root are described using the methods discussed in the V-groove section.WPS xovv.richarelli.ru AWS D1-Series References to WPS for Plug and Slot Welds AWS D No details for testing of procedure qualification for plug or slot welds are available in this code. The only data available in this code in regards to Plug or Slot is for performance qualification (Clause Base Metal Form and Weld Type). AWS B Dec 12, · Plug Weld. Plug welds are circular welds made through one member of a lap or tee joint joining that member to the other. The weld may or may not be made through a hole in the first member; if a hole is used, the walls may or may not be parallel and the . Jun 19, · QW/QB Definitions plug weld: a weld made in a circular, or other geometrically shaped hole (like a slot weld) in one member of a lap or tee joint, joining that member to the other. The walls of the hole may or may not be parallel, and the hole .
Dimensions of plug welds must be shown on the same side of the reference line as the weld symbol. Aeld size of a weld must be shown to the left of the weld symbol. The pitch center-to-center spacing of plug welds shall be shown to the right of the weld symbol.
Common weld symbols and their meanings
Depth of filling of plug and slot welds shall be completed unless otherwise indicated. Plug welds that are to be welded approximately flush without weld to any method of finishing must be shown by adding the finish contour symbol to the weld symbol fig. Dimensions of slot welds must be shown on the same side of the reference line as plug weld symbol fig.
Length, width, spacing, included angle of countersink, orientation, and location of slot welds cannot be shown on the welding symbols. Jeff Grill hails from Long Island, a mile stretch of land that weld just off the coast of Manhattan and stretches deep into the Atlantic ocean.
He has always been interested in welding from an early age and has the cuts and bruises to prove it as he set out to work with a variety of metals. Save my name, email, and website and this browser for the next slot I comment. We've been mentioned on.