My question is how Back arc gouging shall be included in the WPS, thanks By 803056 Date 01-16-2013 17:57 Edited 01-16-2013 22:14. Fillet Both Sides. The back weld is made after the groove weld, and the backing weld is made before the groove weld (see 4. 2 AWS A3. Illustrations for a double bevel groove with back gouge. Add the reinforcing fillets when convenient. Any remaining gouges must be repaired. Customary units. The root pass is used to fill in the space between the two pieces of metal being joined. b. NORTH CAROLINA DEPARTMENT OF TRANSPORTATION DOUBLE V GROOVE WITH BACK GOUGE WELDING PROCEDURE SPECIFICATION (WPS) AWS D1. The double-sided CJP weld needs back gouging. Conclusion. We use Weld symbols everyWhere, from con-tract documents and fabrication level drawings to hand-drawn sketches for informal use in the office. Back gouging is done to assure full complete joint fusion at the root and eliminate root pass discontinuities. e. ¼(5/16) It indicates that the bevel formed has a. For butt joints and welds an S with a number to the left of a symbol refers to the depth of penetration. As a matter of fact, in my opinion the fillet weld symbol is completely inappropriate for skewed joints. E. Could kind of depend on the particular shop practice, but the weld symbol shown on the left (outside) of the joint could be interpreted to show a back-gouge that extends to a previously made inside groove weld. A full welding symbol is made of an arrow line, reference line, & welding symbol. although both use the same welding symbol. Back Gouging The removal of weld and base metal by arc gouging or grinding from the other side of a partially welded joint to assure complete fusion and penetration upon subsequent welding from. Backgouging, or removal of the unfused. E. 17 Back to Table of Contents UNDERCUT. Field Weld Effective Throat M - Machine. The most obvious use of gouging is to remove large amounts of metal or welds that need to be repaired. Its symbol is a straight line showing what the finished surface will look like. 1. Like the 200AMP variant, this weld backing tape also comes in two different widths – 2. 8 explains the meth- What is Back Gouging in Welding? Back gouging is a material removal technique used to remove weld material from a weld joint's back side. back gouge. Bevelling the plate edges allows access to all parts of the joint, enabling good fusion throughout the weld to be achieved. ~. 18. Metal type. 6 การก าหนดสัญลักษณ์การเซาะหลังแนวเชื่อม (Back Gouging Symbol) ในแนวเชื่อมที่การซึมลึกไม่สมบูรณ์นั้น เราอาจจ าเป็นจะ. Tips and Tricks are two general words in the welding industry similar to TIG. Weld one side, i. How is the removal of the backing strip noted on a welding symbol? The. Vee it and weld the one side then back grind the back side and weld it then you will have your 100% penetration. The welding symbol (see Fig. The width of the groove is usually 1/8 in. 0 0. Think of a backing weld as the support for the real weld. Add, back-gouge in tail. Note: Size, weld symbol, length of weld, and spacing must read in that order, from left to right, along the reference line. Any weld made one side without backing or back gouging is considered as a partial joint penetration weld per AWS D1. 0 Standard Welding Terms. 0000 61 section $ symbols for surfacing 5. The sequence of welding determines which designation applies. Back Gouging is the term given to the process of removing weld and base metals from the backside of a weld to take it back to clean. Arrow: this is what is used to point the reference line to where you need to weld. The symbol used is ‘RT’. tail. 0 Standard Welding Terms. You failed to include a significant part of that clause 2. This is not to be confused with a symbol that is a half circle on the reference that is solid black, or filled in, which indicates melt-thru. Lindell Project. El ranurado posterior es el proceso de usar una herramienta para quitar metal de la parte posterior de una soldadura. 1-2010). Where a weld root's consistency cannot be guaranteed, back gouging techniques are used. Back gouging. For groove welds in 8 mm thick plate, single V bevels are used. AWS A3. (120VAC), optional Control Modules (for programmable shape cutting or welding, straight-line cutting and/or welding, straightline gouging, programmable stitch welding, as well as weave capability), optional aluminum rails. Weld size (length of leg) Length of increments. 1 A welder qualified with a backing strip can weld an open root joint if that root pass is back gouged and welded from the back side, but cannot weld an open root filled only from one side. wider than the electrode diameter, with depth of gouge controlled by travel speed. 0 complete Welding on back gouged side after LPT / or MPTWeld symbols on drawings was originally published in 1982 based on BS 499 (British Standards Institution 1980), ISO 2553 (International Standards Organisation 1979) and ANSI/AWS A2. Backgouging and welding the second side of a joint must fall into one of those two conditions. welding instead of manual welding for making root pass. The back and backing weld symbols are identical. The double-sided CJP weld needs back gouging. supplementary symbols. 1) backing. A procedure may require a gouge process to remove steel backing, burn off weld tabs or back gouge. The same weld symbol appears above and below the reference line along with all detailed information. ‘b’ for - BC-U4b: Back Gouge Basic Weld Types & Symbols - Gouging: Basic Weld Types & Symbols - BASIC CJP WELD SYMBOLS: CJP WELDS COMMON WELD PROCESSES & POSITIONS Common Weld Processes & Positions Commonly Used Arc Welding Processes Are: Shielded Metal Arc Welding (SMAW) – Stick Electrode. txt) or view presentation slides online. The welding symbol requirements for CJP and PJP welds belong stated in AWS D1. Now you are grinding to remove any unfused root, possibly some excessive melt through, what ever the reason, that can be considered a back gouge operation to attain sound metal. 5. All of that air and hot slag flying around up. The symbols given in this document can be used on technical drawings for welded components. 1 clause 2. g. The Arrow Just as it sounds, the arrow is a line and arrowhead coming off one end of the reference line. Also the weld size (E) applies individually to each groove. None of the above Questions F134 and F135 refer to figure 3. Back gouging is a process of cutting a groove in the back side of a joint that has been welded. In this video it is explained about MELT-THROUGH SYMBOL AND BACK OR BACKING WEL. To be full pen and prequalified, you would have to address the back side of the root (back gouge). By waccobird Date 09-23-2010 14:16. In this episode, we are going to show you how to gouge ou. 707 x leg leg = 1. W. 7. In addition to the cost, it creates undesir - able triaxial stresses. The sequence of welding determines which designation applies. 2. where applicable, should be specified) Welding Progression: Up POSTWELD HEAT TREATMENT (QW. top bulge. 5. reference to back-gouging in the tail as shown in Figure 31. 1 Distinction between weld symbol and welding symbol. 2a–c) in three ways: (a) elastic deformation of weld joint beyond acceptable limits (like bending or torsion of shaft and other sophisticated engineering systems like precision measuring instruments and machine tools), (b) plastic deformation of engineering component across the weld. a. The long-awaited revision of ISO 15614 Part 1, the ISO standard for the qualification of arc and gas welding procedures for steels and Nickel alloys, was completed in the first half of 2017. When a welder makes a weld, the first part of the weld he makes is called the “root” pass. NOTE: Butt weld made aft er welding other side (b) Use of backing run or backing weld symbol to indicate single-run backing weld. u groove welding symbol. What is Partial Joint Penetration Weld? Partial joint penetration (PJP) welding is a type of weld where the welding filler material partially penetrates the base metal, leaving a gap between the base metal and the root of the weld. hogan666 (Structural) 23 Feb 09 13:09. A spacer to hold. Eng uOttawa. 3, and given below for reference. A3. Download. Material is 5/8". The melt-through shape is a black half circle (see Figure 4). Base Metal. top D. To be certain of removing the unfused land, 'back gouging' the root and filling the groove with sound weld metal is generally carried out. tailb. Bevel. pdf), Text File (. 44 section 5. Inclined 6G—The pipe is fixed in a 45° inclined angle,. Method of Back Gouging Oscillation Contact Tube to Work Distance Multiple or Single Pass (Per Side). This configuration informs the operator the butt weld is to be done in the 1G position (flat butt weld). Skip to product information. Completed Joint. Struggles that come with gouging. Gouge /' ~ 7' 60" Single V Groove, FIELD wi Groove Angle WELD SYMBOL 22-2: 22-3 Illustrations for a Single V-groove with Back Gouge . Fillet Near Side. a symbol used when the throat is larger than the sides of the weld. Single vee groove with grinding flush weld contour in arrow side,unless if the drawing note said that!only one side weld with out backing,back gouging and reweld from second side. Use back weld or backing. 4, where the V groove weld. Please clarify. c. SUPPLEMENTARY SYMBOLSSUPPLEMENTARY SYMBOLS. The air carbon arc cutting process (CAC) is used to cut metal, to gouge out defective metal, to remove old or inferior welds, for root gouging of full penetration welds, and to prepare grooves for welding. Contact. Back gouging removes discontinuities of the root pass and ensures 100% joint fusion at the root, and backing aids complete joint. Before we decode the symbol, it’s important to grasp the concept of a consumable insert. What two units are used to show the minimum shear strength of a spot weld? Pounds per weld 29. to remove weld metal or base metal from the other side after welding. Expert Help. (For the example image of the Welding Symbol. It is used to retain molten weld metal in the joint. to indicate the member to be prepared for the J- and bevel welds the arrow breaks toward that member. 5 2. It's also common to assure good weld penetration in "almost" one. Its purpose is to indicate exactly where to place the weld on the parts. 75 x thickness. BRIDGECAM. Position(s) of Groove Position(s) of Fillet PREHEAT (QW-406) Preheat Temperature, Minimum ELECTRICAL CHARACTERISTICS (QW-409) TECHNIQUE (QW-410) String or Weave Bead Orifice, Nozzle, or Gas Cup Size Initial and Interpass Cleaning (Brushing, Grinding, etc. 3-42). When the dihedral angle is less than 60 degrees, the Z. 4. Determination of which type (backing weld vs. The term Complete Joint Penetration (CJP) is how it is referred in the industry. 1 52 53 34 58 general. Joint and Weld Designation Examples The lower cse letters, e. Common additional symbols used with groove welds are the melt through, backing bar, and back weld and backing symbols. Plasma gouging works in a way similar to plasma cutting. 2 and 6. Two of the most common methods of gouging metal are plasma gouging and air carbon-arc gouging. c. 2. 80° to 90° 0° to 360°. Although these processes are easier and more labor-efficient than conventional methods, such as using an oxy-acetylene torch or grinding, they can also come with. American Welding Society 550 NW LeJeune Road Miami, Florida 33126specify the weld size on a weld-ing symbol. This way, you don't have to back-gouge and weld the reinforcing fillet. In addition, the weld toe of the tack weld or fillet weld on the beam flange would act as a stress concentration and a potential fracture initiation site. Ministry of Housing and Urban-Rural Development; General Administration of Quality Supervision, Inspection. Square Welding Symbol. GB 50661-2011: Code for welding of steel structures (GB50661-2011)root Weld defects Double bevel groove Back gouging to remove root defects Good weld quality 53 Butt Joint J groove Good access at the root Back gouging and back welding to get good weld quality Less weld metal Higher edge preparation cost Better for thickness gt 40 mm 54 Tee Joint Full strength joint In a full strength joint, leg 0. See Det. Joints are combined with welds to make weld joints. The predominant way of doing this is either using the symbols from ISO 2553, which is common in Europe, or AWS D1. Consumable inserts are made from same. With V-groove welds, the edges of both pieces are chamfered, either singly or doubly, to create the groove. A3. Weld SYMbol definitions BACK WELD, OTHER SIDE per AWS A2. I would weld the bevels, weld reinforcing fillet on the first side, then the second side. The welder moves the torch back and forth across the width of the metal being welded. a Fillet Weld, a bevel or square butt, etc. 3. eomeioee ‘Base, Motal Thickness: swe . For nonsymmetrical double groove welds, the symbol needs to show the required. Fillet Weld Symbols. 25-2 Illustrations for a Double V-Groove with Back Gouge. The alternative approach replaced the back gouging operation with a unique root pass procedure that ensured a CJP groove weld. to present this information to help aid in gouging process design. 4. Vertical 15° to 80° 125° to 235°. The root pass is used to fill in the space between the two pieces of metal being joined. D1. Another option would be a "backing weld" on the "other side" and standard fillet weld on the "arrow side" with notes as needed in the tail. 4:2020. 7. So, backgouging refers to the process, while a backgouge is the resultant pit in the base metal from the process. The momentary recession of the flame into the welding or cutting tip followed by reappearance or complete extinction of the flame. Although a backing weld is backing in the form of a weld, the backing symbol represents a material or device. Back gouging. The metal that is being welded on. But more often than not weld symbols can be misused or overused. The weld is made by the robot moving around the workpiece in a circular or orbital path. It also has an excellent heat resistance of up to 550° C. 7. Part 5. 1. Fillet welds are the most common types of welds. When might you not have a weld symbol in the welding symbol? See Figures 10-18 and 10-19. For example if you are. In welding, gouging has been a requirement for many years in several industries and applications – and is one method to scrutinise. arrowc. 20. There are 5 main joints used in welding. Title: A21-desk. Use of a backing symbol should not be confused with the use of back or backing weld symbols. This chapter from the Welding Handbook, 9th Ed. Splices, where required are to be complete joint penetration groove welds. those symbols mean the engineer was drunk or high. American Welding Society 550 NW LeJeune Road Miami, Florida 33126 AWS D1. Back Gouging for Full Penetration Welds When it comes to critical strength application or members where pressure vessels are involved, on many occasions, we. In some cases, weld backing may also eliminate the need to grind or. 5. Hertz (Hz) is the symbol which has replaced the term “cycles per second. Like the 200AMP variant, this weld backing tape also comes in two different widths – 2. Back gouging c. Back-Gouge. 1. Runoff tabs are used to help with fit-up. As long as it is feasible to make a full penetration, such situations are. The Dl. Retire los materiales para la reparación de soldadura. measurement used to show the size of an object. Up to 3/4" 100° Over 3/4" to 1 1/2" 100° Over 1 1/2" to 2 1/2" 150° Over 2 1/2" 225° WPS Description Double V Groove With Back Gouge Written By: Randy Dempsey, CWI/CWE, TT IV Signature:The back weld and backing symbols use the same symbols, and many welders confuse them. CJP (complete joint penetratio n): A joint root condition in a groove weld in which weld metal extends through the joint thickness. The back weld symbol is placed on the side of the reference line opposite a groove weld symbol. 2 Back Weld Symbol. Orbital welding is used to weld thin sheets of metal together. Clean the completed weld of all debris, slag and spatter. Desired weld Figure 14-14. . Back gouge the opposite side to sound metal, back weld. Back-Gouging a weld joint to ensure 100% joint penetration. 75 x thickness. Tail Optional) Sequence of Information in the Tail • Process (as per ISO 4063) • Acceptance Level (as per ISO 5817 or ISO 10042)The most popular weld is the fillet weld, named after its cross-sectional shape. Be able to interpret AWS welding symbols that include all of the information that could be used on them. Figure 45,. ½ diameter, used to either make part or all of a circle. Back, Backing weld, Surfacing weld A back or backing symbol is the same for both, you must look in the tail for further information to distinguish between them. Most of the common weld types in the industry are used when the joint has two members joining together to create an intersection of 90 degrees. 23 CJP Groove Welds for NonTubular Connections. Back-gouging and/or back-grinding to achieve root weld integrity are introduced as necessary. 111 – What is the significance of a break in the arrow line of a welding symbol has?. below. (For the example image of the Welding Symbol with. Welding Symbols: p. The insert is a filler metal that is fused into the root of the joint and becomes a part of the weld. 6 – Structural Welding Code – Stainless Steel In the ____-groove welds, only one of the two members is beveled. 707 x leg. What is the purpose of back gouging? The purpose of back gouging is to prevent incomplete fusion or lack of penetration (LOP) defects, which can lead to. Welding Symbols for Grooves Welded from Both Sides with Back-Gouging Pitch – distance between Only depth of preparation is required in the welding symbol centres of increments 12 75-125 12 75-125 12 GTSM GTSM 10 10 Weld size (length of leg) Length of increments GTSM signifies total effective throat is equal to the thickness of material. welded. Cheers, 26. NOTE3 Figure 14-15. The backing weld symbol indicates a bead-type backing weld on the opposite side. A back weld is when a weld is made in the groove of a joint and followed by a weld applied to the root side. This is a list of the various items that will be needed to build the weldment. Read MoreThis allows it to gouge or cut a wide range of metals, including carbon steel, stainless steel, high-alloy wear plate, copper alloys, and cast irons. Remove all slag, spatter and weld discontinuities between passes. 114D 4 1/4 8. Assuming the base metal is carbon or high strength low alloy steel and provided the. True or False. Welding Symbols for Grooves Welded from Both Sides with Back-Gouging Only depth of preparation is required in the welding symbol GTSM 12 10 GTSM. When it comes to critical strength application or members where pressure vessels are involved, on many occasions, we will have to complete an entire penetration weld so as to meet the parameters of the job or project. Figure 1, located on page 50, illustrates the steel backing. ck Gouge Required before welding side two Ba. A full welding symbol is made of an arrow line, reference line, &. 7. Tack welds help keep the right alignment and distance between the parts that are being fused together. 2. 7. 1 Distinction between weld symbol and welding symbol. Back gouging can ensure 100% joint fusion at the root and remove discontinuities of the root pass. Care must be taken to achieve the. e. A groove (or butt) weld is a type of weld where parts are joined via a weld between a groove or gap (think of the groove joint discussed at the start). Guili Tru-Weld Equipment Company C. Part 3. Air carbon arc cutting is also used when slightly ragged edges are not objectionable. Study Resources. Concave- Direction of welding is placed in the tail of the weld symbol. pdf), Text File (. Here are some commonly used NDT symbols: Radiographic Testing (RT): This technique employs X-rays or gamma rays to inspect welds for internal flaws. The "spacer material" symbol modifies the shape of the groove weld symbol by the addition of a circle within the groove symbol. Weld Related. Sometimes plates are either grooved and welded or just welded on one side and then back-gouged and welded. 235° to 360°. A 6. SPACER. The back weld is made after the groove weld, and the backing weld is made before the groove weld (see 6. specified, a tail is included as part of the welding symbol for inclusion of the. 0 1. QW-482 (Back) POSITIONS (QW-405) WPS No. Weld repair the affected area. The area of the cut is small and, since the metal is. bar removal, back gouging, and re-welding requirements. These welds would be in the vertical or horizontal position unless flipped on end. arrow. 8. What is Back Gouging in Welding? Back gouging is a material removal process that is used to remove weld material that is located on the back side of a weld. In the standard welding system, the _____ connects the reference line to the joint or area to be welded. Many of those questions can be addressed by the welding symbols given by the drawings. I was gonna suggest what Chet mentioned, the purpose of a weld symbol is to simply convey to the welder exactly what work needs to be done. 136 – In what way, an ultrasonic inspection is to be performed for Figure 3?V Groove Weld Preparation. This eliminates potential harmful effects that discontinuities on the weld tab may cause. To address these issues, air gouging is. throat = 0. Minimum effective throat (E) as shown in LRFD Specification Table J2. 62 size (thickness) of surfaces built up by welding. In welding, the hot pass, root pass and capping pass are the three most important passes. See Clause D1. Field weld. 412007 BACK WELD, OTHER SIDE Ba. Single Flare Bevel Weld Symbol: A single flare bevel weld symbol is formed by vertical line on left hand side & a curved flare line on right side of the welding symbol. พอกผิว (Surfacing Weld Symbol). welding from that side". 7. (a) the use of a new symbol for edge weld to replace the symbols for flange edge and corner welds (see Section 6); and (b) the introduction of a symbol for stud weld (see Section 11). ultrasonic inspection of the base metal. A back weld is performed after back gouging as indicated by Dividstecker. 05/25/2008 11:33 AM. Overhead 0° to 80° 0° to 125°. Height, contour, and method of contour are all types of information that can be added to the back or backing weld symbol. A direct splice between the two members is the better detail if you have welders with the ability to weld grooved joints. A Welding Symbol is partial without a Weld Symbol. Weld repair the affected area. When referring to prequalified joint as per AWS D1. The sequence of welding determines which designation applies. UNDERCUT GAUGE BRIDGECAM. Joint ELEMENTARY WELD SYMBOLS. When there are no specific dimensional requirements specified for butt welds on a drawing using weld symbols, it would normally be assumed that the. Do not fill weld access holes with weld material for cosmetic or cor-rosion-protection reasons. TheA big thank you to Hypertherm, who for sponsored this video. Proper preparation is essential for a successful V groove weld. Although both symbols represent the same. The objective of Back gouging is to facilitate completeweld fusionfrom the root side back weld. The edges are then shaped into a V shape using various tools, such as grinders or milling machines. 5/16 * 1/2 - 1018. The alternative approach replaced the back gouging operation with a unique root pass procedure that ensured a CJP groove weld. 2. g. 3. Weld Design Symbols - Free download as PDF File (. When the. , are used to differentiate between joints that would otherwise have the same joint designation “a” for backing bar “b” for back gouge Design Drawings and Welding Symbols Complete info regarding location, type, size, and length of all welds shall be clearly. So with regard to B-U2, this “other side” weld is not being used for backing. backing, or other information. But this is not the end. BTC-P10-GF. If there are voids, gaps, between the weld metal and the base metal, this is referred to as a lack of sidewall fusion. A spot weld symbol can be placed as an arrow side, other side, or straddle the reference line where it means no side significance. 7. 2. " What it does not say is that a welder qualified with back gouging (instead of backing) is qualified for. "joints with back gouging, consistent with the prequalified AWS D1. 00 Easy to read wall chart to complement the AWS A2. Holdren Arc Specialties C. Choose the correct welding symbol that precisely. Back gouging is the smoothing, leveling, and re-applying of weld metal to the root of a joint, which is the area where the weld metal makes contact with the butt joint. 412007 BACK WELD, OTHER SIDE Ba. The symbol consists of a reference line, arrow, and weld symbol that specify the type of groove, the size and shape of the weld, and other important details. Introducing too little heat, resulting in a “cold weld”.