Gg back gouging or back grinding of weld เซาะหรือเจียรดา้ นหลัง Mb welding with backing material เชอ่ื มโดยใช้วสั ดุรองหลงั Nb welding without backing ( no backing) เชื่อมโดยไม่ใชว้ ัสดรุ องหลงัWhere – the weld inspection zone: a) All work - Completed weld faces plus ½ inch on both sides of weld shall be visually inspected for the entire length of the weld. Altemately, if multiple reference lines are used, the back weld symbol shall be placed on a reference line subsequent to the reference line specifying the groove weld [see Figure 27(A)]. 5 Symbols for surfacing. Part 1. Dimension. Figure 1 illustrates the value of typical back-gouging applications carried out on arc welded joints. Re: Backgouge on weld. ½ diameter, used to either make part or all of a circle. This type of weld is used for tubular. Bevel. F134 The first operation required by the above symbol is: a. 3-49). 50 Non-Member Price: $38. So, Weld Symbol supplements a Welding Symbol to provide full details about the welding requirements. In addition, the gouged groove must be back filled with quality weld metal. Flat 0° to 15° 150° to 210°. In addition, the format of the Standard has been changed and editorial changes have been included in line with current Standards Australia policy. Back gouging c. The term "_____" indicates removal of weld material and base metal from the other side of a partially welded joint. Fillet welds are the most common types of welds. An introduction into reading Welding Symbols. Maximum single pass. Overhead 0° to 80° 0° to 125°. Remove all slag, spatter and weld discontinuities between passes. Standard Welding Symbol Layout 60 Standard Welding Symbols 61 Using Finger Gauge 67 Using Bridgecam Gauge 70 Definitions 73. P GB 50661-2011. 2. Back gouging. A poorly designed weld joint can lead to the failure (Fig. ¼(5/16) It indicates that the bevel formed has a. Pipe Welding Positions (cont. Very interesting approach. Weld Design Symbols - Free download as PDF File (. The presence of ”R” means removable backing. , 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. 7. This video explains what both of those welds are and the differences between them. Even performing SAW using a single solid-wire in direct electrode positive (DCEP) mode, the simplest. NASCC: THE STEEL CONFERENCE WELDING SYMBOLS AND PRESENTATION FOR DESIGNERS AND DETAILERS (N72) PRESENTER: ROBERT WHYTE, PE, SE LBYD, INC. Orbital welding is a welding process that uses a robotic welder to make a weld. Particularly in maintenance and repair, the ability to gouge or groove metal. Near the start of the video, there is an explanation of the weld symbol used, square butt with 1/8" root opening. The ______ joint is often the best choice for horizontal butt welding. 3. Has anyone used these tapered ceramic backers?The owner is calling foul and wants all the "backgouged" welds to pass UT since the customers contention is that the weld symbol with "backgouged" should be a full pen weld and not have any root detectable reflectors. Rev. Weld repair the affected area. A procedure may require a gouge process to remove steel backing, burn off weld tabs or back gouge. back gouge. 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 Bevel Groove With Back Gouge Written By: Randy Dempsey, CWI/CWE, TT IV Signature: Typical Welding Symbols Double-Fillet Welding Symbol Chain Intermittent Fillet Welding SymbolStaggered Intermittent Fillet Welding Symbol Fillet Weld Size 1/46 3/164 Length Omission of Length indicates that Weld Extends Between Abrupt Changes in Direction or as Dimensioned 5/16 7/16 2-5 2-6 Pitch (Distance Between Centers) of Segments Fillet. FIGURE 4. BASIC WELDINGBASIC WELDING • COMMON WELDING PROCESSES • WELDING TERMINOLOGY • WELD SYMBOLS / JOINT CONFIGURATION • WELDER RELATED • WELDING SAFETY 3. 4: "6. A weld process by heating in assembly to suitable temperatures and by using a filler metal, having liquidus above 450°C (842F) and below the slow DS of the base. As long as it is feasible to make a full penetration, such situations are. 1. 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. • Repair: Possibly simply increase the face reinforcement. What is it that is special about the root pass? Simple: it’s the most challenging part of the weld to make, and it’s the easiest part to do badly without anyone being able to tell after the weld is completed. Back to Table of Contents. Struggles that come with gouging. 2 Back Weld Symbol, The back weld symbol is placed on the side of the reference line opposite a. 2. "-Brent Yes. SUPPLEMENTARY SYMBOLSSUPPLEMENTARY SYMBOLS. The insert is a filler metal that is fused into the root of the joint and becomes a part of the weld. 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). Spacer Material Symbol • Groove weld may include a metal strip inserted at root of joint – Maintains root opening or bridges members of a joint with wide gap • Spacers may be removed by back gouging after initial weld – Second weld completed from opposite side • Spacer may be integral to weldDon, back gouging usually refers to carbon arc gouging. make it easier on your welder by performing the back gouging on the outside. where applicable, should be specified) Welding Progression: Up POSTWELD HEAT TREATMENT (QW. The back weld symbol is placed on the side of the reference line opposite a groove weld symbol. In contrast, a welding symbol is the complete information package the designer wants to relay to the welder. 2. Stringer beads: This type of welding is often used for welding thin metals together. its the same weld symbol you have shown. 2 of Appendix D. The basic welding symbol consists of the reference line, about which the weld symbol and dimensions are located, and an arrow designating the location for the weld. In joints with thicknesses of 0. Other types of welds include flange welds, plug welds, slot welds, seam welds, surfacing welds, and backing welds. Back Gouging. one fusion line will be present during back gouging. d. "backing -- a material placed at the root of a weld joint. Base Metal. Add the reinforcing fillets when convenient. Back gouge refers to the removal of weld and parent metal from one side of a partially welded joint in order to allow fusion and full joint penetration from the other side. MULTIPLE CHOICE QUESTIONS. Basic Weld Types &. What is back chipping in welding? Back chipping is an essential procedure for the welding, which removes the weld root from the back. g. L. Clarification required how much depth back gouging is accepted. CJP (complete joint penetratio n): A joint root condition in a groove weld in which weld metal extends through the joint thickness. In the case of melt through, the groove is reinforced with a weld on the back side of the joint welded from the opposite side. 1, after back gouging it is not possible to achieve the exact same joint configuration. Part 1. V Groove. (SI unit symbol: kg) is the base unit of mass in the International System of Units (SI). Back to Table of Contents. 4 Supplementary symbols. with the BTC-P10-GF you can't gain access to the back side of. E. Can ensure 100% joint fusion at the root & can remove discontinuities of the root pass. Back-gouge second side to sound weld metal and visually inspect back-gouge. W. 2 and 6. 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. Yes the print shows splice plates where they terminated support angles at the toe of the main corner angles. 3. Retire los materiales para la reparación de soldadura. Back gouging is indicated in the tail section of a welding symbol. After welding we are doing Backgouging . UNDERCUT GAUGE BRIDGECAM. 2 Use of surfacing symbol. , fill the bevel flush. b. 1. 114D 4 1/4 8. the spacer material symbol modifies the shape of the groove weld symbol by the addition of a circle within the groove symbol. Created Date: 1/22/2019 4:01:57 PMBack gouging is a process of cutting a groove in the back side of a joint that has been welded. Fillet Both Sides. This ensures that the joint is fully penetrated and strong. 0 Standard Welding Terms. Unit 14 Welding Symbols 179 A field weld symbol indicates the weld is not done where the unit is initially made, Figure 14-15. Backing bar weld symbol according to AWS A2. eomeioee ‘Base, Motal Thickness: swe . Orbital welding is used to weld thin sheets of metal together. welding instead of manual welding for making root pass. Study Resources. 4. e. The most obvious use of gouging is to remove large amounts of metal or welds that need to be repaired. The vertical leg of the fillet weld symbol is always shown drawn to the ____ of the slanted side of the symbol. Back gouging is done to assure full complete joint fusion at the root and eliminate root pass discontinuities. Chemical back gouging, on the other hand, involves using a chemical agent to remove the weld metal and base metal. Add, back-gouge in tail. Weld repair the affected area. Gouging is necessary for many tasks related to welding. Hoses and Power Cables 195 Section 3 Cutting and Gouging 149 Gas Hoses 195 Power Cable 197 Chapter 7 Flame Cutting 151 Coolant System 197 Objectives 151 Coolant 197 Key Terms 151 Coolant Hoses 197 Introduction 152 Control Wire 198 Metals Cut by. Which type of weld joint can be fitted together so that the joint forms a V-groove or square butt joint? outside corner. The 5/16" fillet in the T-joint and the backing weld in the groove (other side). Perhaps you assumed to you would see a single V with a closed root and a back gouge with air carbon arc, then rewelded end from the opposite side?. The basic welding symbol consists of the reference line, about which the weld symbol and dimensions are located, and an arrow designating the location for the weld. 3—2005 SECT ION 62 5 SYMBO L S FOR SURFAC I N G 5. Convex. Weld SYMbol definitions BACK WELD, OTHER SIDE per AWS A2. Type 1: CJP groove weld (statically and cyclically loaded. a. 80° to 90° 0° to 360°. The joint design in question is from the prequalified ,B-U2 in AWS D1. A welding symbol is what you see on the fabrication drawing. b. CHAPTER 10 Practice Exercise 1 Describe completely all of the information contained in the following welding symbols 2. Dimension. Concave- Direction of welding is placed in the tail of the weld symbol. Design Part 4. I mean to ask if I have a plate structure (instead of beams & columns). 10. Bevelling the plate edges allows access to all parts of the joint, enabling good fusion throughout the weld to be achieved. In the case of melt through, the groove is reinforced with a weld on the back side of the joint welded from the opposite side. AUGUST 1, 2012. See moreThe back gouging symbol on a welding diagram indicates that the welder must gouge out the reverse side of the weld, down to the base metal, before. Back gouging is required to remove the base metal and weld by arc gouging or grinding at the other side of the weld thereby ensuring the deep fusing and penetration welding on the other side subsequently. 1, examines each component of the welding symbol reference line required arrow required tail basic weld symbol dimensions and. nena sosnnnnnnnnnnneennnnseneeee od use of surfacing symbol. This increased emphasis on safety and health often is accompanied by reconsideration of how certain tasks are performed, for example, cutting. For moment frames, consider using partially restrained or flex-Back gouging is a process of cutting a groove in the back side of a joint that has been welded. The objective of Back gouging. 1 Sequence of Operations. CJP Welding Type 2. But more often than not weld symbols can be misused or overused. Member Price: $28. Back gouging is a process of cutting a groove in the back side of a joint that has been welded. 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 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 that side (Figure 9). 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. The overall joint was a tee, composed of two 3 in (75 mm) steel members, and was prepared with a double bevel groove preparation, using a 50 degree included angle, no root opening and no root face. Coxstrucrion Single V-groove weld (2) PREQUALIFIED WELDED JOINTS Complete-penetration groove welds Back gouge 4-159 Mota Hickness (U = unlimited) z 3 Back gouge V- weld (2) . 1. IMPLEMENTED ON. E. Field Weld Effective Throat M - Machine. 23. GTSM = GOUGE TO SOUND METAL BROKEN ARROW POINTS TO MEMBER OF JOINT TO BE BEVELLED. When referring to prequalified joint for per AWS D1. 1 52 53 34 58 general. Supplementary symbols used in association with this butt weld symbol may include the type of weld. A Type 1 CJP weld is one that uses a backing strip or backing plate to guarantee complete fusion between both plates with the root backing. then like stated back gouge the second side to cut out the line of non-fusion and get down to sound material, then weld it back up flush. Back gouging is required to remove the base metal and weld by arc gouging or grinding at the other side of the weld thereby ensuring the deep fusing and penetration welding on the other side subsequently. For weld processes that can be prequalified as per paragraph 10. specified, a tail is included as part of the welding symbol for inclusion of the. back gouge D. While the steel code allows for prequalified welding procedur es, this code does not. Q. forward gouge. 5. 6 การก าหนดสัญลักษณ์การเซาะหลังแนวเชื่อม (Back Gouging Symbol) ในแนวเชื่อมที่การซึมลึกไม่สมบูรณ์นั้น เราอาจจ าเป็นจะ. 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). " What it does not say is that a welder qualified with back gouging (instead of backing) is qualified for. back gouge. (38' high) If they show full pen, I will be back gouging/grinding, but with the basic symbol they gave me, (just the double square groove) I did not plan. Once again, there is little chance the welder can do what you specify due to limited access between the two ends of the wide flange beams. Weldment. ca. 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. 3). No tail note on back v. Sometimes plates are either grooved and welded or just welded on one side and then back-gouged and welded. A backing (strip) is a piece of metal that is placed on the backside of a weld joint to prevent the molten metal from dripping through the open root (burn through). Process of cutting a groove in the back side of a joint that has been welded. Two of the most common methods of gouging metal are plasma gouging and air carbon-arc gouging. Back Gouging . bar removal, back gouging, and re-welding requirements. 7. Consumable inserts are made from same. 5″. Clean the completed weld of all debris, slag and spatter. When there are no specific dimensional requirements specified for butt welds on a drawing using weld symbols, it would normally be assumed that the. When the steel backing bar is removed, often by air carbon arc gouging the root of the weld may be restored by rewelding. 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. For groove welds in 8 mm thick plate, single V bevels are used. 3 Basic weld symbols. 1 clause 2. See Det. Back Gouging. The act of back gouging the root isn't technically "welding" and in many cases is not performed by the same individual that welded the joint. Bevel Groove. Horizontal 0° to 15° 125° to 150°. 25 inches. Which side do you weld first and which side is back gouged? By welderbrent Date 04-12-2017 13:31 Well, isn't that obvious Lawrence? You backgouge from the side. Part 2. If backwelding is not possible, must remove and reweld. The welding symbol you describe could go either way as there is no technical difference in the symbols for back or backing welds. 20 inches or more, you can still obtain penetration without creating a groove bevel. 4, where the V groove weld. Determination of which type (backing weld vs. If R is omitted in backing symbol, its means permanent backing to be used. By waccobird Date 09-23-2010 14:16. I've seen the ceramic backer bar that is tapered along one edge, that allows the root weld to be the reinforcing weld on the far side of the joint. Code for Welding of Steel Structures. With 3/16 if you want to gap you can gap it between 1/16 and 3/32 it will help considerably but if you want to achieve a true 100% weld you will have to back grind or on heavier stuff back gouge and grind then. So with regard to B-U2, this “other side” weld is not being used for backing. Il O CD o a (BOTH SIDES) (ARROWÄ (OTHERN SIDE SIDE CD å . The sequence of welding determines which designation applies. pdf), Text File (. If the weld metal is not entirely adhered to the base metal, the weld zone strength will be compromised. We would like to show you a description here but the site won’t allow us. true. Square Welding Symbol. No tail note on back v. This video is the concluding part of the series ' WELDING SYMBOLS EXPLAINED'. These welds would be in the vertical or horizontal position unless flipped on end. Wetting Out. arrow. NORTH CAROLINA DEPARTMENT OF TRANSPORTATION DOUBLE V GROOVE WITH BACK GOUGE WELDING PROCEDURE SPECIFICATION (WPS) AWS D1. welded. construction-and-building; 26. Design-related specifications, such as type, thickness, and length of weld, weld quality, surface treatment, filler material and testing specifications, can be indicated directly at the weld by means of the symbols given in this standard. 1 Symbol application. The metal that is being welded on. 5. 3 – Structural Welding Code – Sheet Steel AWS D1. Weave beads: Weave beads are often used for welding thicker metals together. The welding symbol requirements for CJP and PJP welds are specified in AWS D1. The removal of weld metal and base metal from the other side of a partially welded joint to assure complete penetration upon subsequent welding from that side. 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. 0 Plate Thickness in inches Type of loads acting on welding joints Welding Symbols as per ISO 2553) Weld Reference symbol line. In addition to the cost, it creates undesir - able triaxial stresses. Welding symbol states bevel groove on arrow side with 3/8" depth of preparation, back or backing weld symbol on the other side. The back weld is the "last" weld deposited to "fill" the groove that results when the second side is back gouged to remove any unfused material or weld in the root that might be compromised. Guili Tru-Weld Equipment Company C. The sequence of welding determines which designation applies. American Welding Society 550 NW LeJeune Road Miami, Florida 33126 AWS D1. The details nearest the reference line go first. Complete joint penetration is required. The momentary recession of the flame into the welding or cutting tip followed by reappearance or complete extinction of the flame. 30) 4. 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 . The question is, when performing a back gouge, does one need to show a st ep in the welding symbol indicating that that 'U/J" groove created by back gouging needs to be treated as a groove, or is it assumed, any weld made ontop of said back-gouge is sufficient? Thanks! By jwright650 Date 03-08-2016 14:37 Personally, I think Option 1 is. So basically, the weld symbol is a part of the welding symbol. The welding symbol (see Fig. welded. hogan666 (Structural) 23 Feb 09 13:09. 4. But the weld symbol shall specify the weld dimensions (S- throat size) for the PJP weld. 1 general. The back weld is made after the groove weld, and the backing weld is made before the groove weld (see 6. 3. Backgouging is a term used in welding to designate one operation consisting in grinding the root pass from the back side to sound metal and then finishing the weld by the back side. 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. Therefore, a note in the tail of the welding symbol may specify which type of weld is required or it may be specified in the legend. Also the weld size (E) applies individually to each groove. Good access at the root Back gouging and back welding to get good weld quality Less weld metal. WELD QUALITY The fact that the double sided joint requires two difficult-to make root passes makes it unlikely that the reduced weldweld symbol calls for a CJP groove weld with a throat that ex-tends through the thickness of the member (as illustrated in part B). Figure 1, located on page 50, illustrates the steel backing. 2. One way is to use a welding symbol with multiple reference lines on the drawing. The result was the Fiback Weld Backing Tape that came in two variants – 200AMP and 600AMP. Care must be taken to achieve the. 2. NOTE3 Figure 14-15. E. Flattening out of a weld due. Examples are in U. A back weld. a symbol used when the throat is larger than the sides of the weld. 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. the spacer material symbol modifies the shape of the groove weld symbol by the addition of a circle within the groove symbol. F Concave H - Hammer. How can the groove be cut on the edge of a plate? Back gouging 31. Principle 12: A good welded connection recognizes commercial realities. 4. What two units are used to show the minimum shear strength of a spot weld? Pounds per weld 29. Back Gouging. The heat from the transferred arc melts the metal rapidly, and a high-velocity gas jet blows the molten. December 2019. 7. The predominant way of doing this is either using the symbols from ISO 2553, which is common in Europe, or AWS D1. These are: Butt joint; Corner. leg = 1. This eliminates potential harmful effects that discontinuities on the weld tab may cause. A Welding Symbol is partial without a Weld Symbol. Weld 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. 7. Back gouging is a material removal process that is used to remove weld material that is located on the back side of a weld joint. Customary units. 2. Backing welding is commonly used with groove welding in order to strengthen the other side of the weld. Back-gouging and/or back-grinding to achieve root weld integrity are introduced as necessary. The welding symbol without dimensions and with "CJP" in the tail designates a CJP weld as follows: The welding symbol without dimension and without CJP in the tail designates a weld that will develop the adjacent. When back-gouging is required, the welding symbol must include a. The best way to clarify intent for back or backing welds is to provide. to indicate the member to be prepared for the J- and bevel welds the arrow breaks toward that member. Of course, you will have to specify what size weld on the inside corner. 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. Runoff tabs are used to help with fit-up. measurement used to show the size of an object. 17 Back to Table of Contents UNDERCUT. 1, Clause 4. Fillet Near Side. The back gouging symbol on a welding diagram indicates that the welder must gouge out the reverse side of the weld, down to the base metal, before depositing more weld metal. txt) or view presentation slides online. 75 x thickness. . Remove all slag, spatter and weld discontinuities between passes. c. Types of Joints. to facilitate complete joint penetration. Backgouging refers to the process of removing weld and base metal from the backside of a weld. As mentioned above, here are the words in AWS D1. A type of weld that is triangular in shape and joins two surfaces at right angles to each other in a lap joint, T-joint, or corner joint. Field weld. 178いテくAxial Weld 9. Gouging is necessary for many tasks related to welding when the operator is trying to remove material to get to clean metal. A Definition is the removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side. The double-sided CJP weld needs back gouging. The welder moves the torch back and forth across the width of the metal being welded. NOTE: Butt weld made aft er welding other side (b) Use of backing run or backing weld symbol to indicate single-run backing weld. Flashcards; Test; Learn; Solutions; Q-Chat: AI Tutor; Spaced Repetition; Modern. A spot weld symbol can be placed as an arrow side, other side, or straddle the reference line where it means no side significance. Common additional symbols used with groove welds are the melt through, backing bar, and back weld and backing symbols. 7. Example 1 (top left side) in the below picture shows the welding symbol for single fare bevel weld. A backing weld goes on before the actual groove weld. Fillet Far Side. 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. 1 has the following definitions. Specifications are often located near the views to which. " From what I understand from these definitions, only after backgouging then back weld is considered "with backing. Back gouging -. 2. The weld may either be made from one side with steel backing or from both sides with back gouging. A welding symbol has three parts: Reference line: this is the main part of the symbol and it's function is to carry or provide all the information on the weld to be made. 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. Unless it follows a different standard. The term "_____" indicates removal of weld material and base metal from the other side of a partially welded joint. The root pass is used to fill in the space between the two pieces of metal being joined. Back notching. To help operators understand the type of weld joint (fillet or groove) and the weld position, each weld is given a number and a letter — 1G, 2G, 3G, 4G or 1F, 2F, 3F, 4F — to indicate the position and the type of weld required, encompassing all welding positions. 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. Completed Joint. Back gouge the opposite side to sound metal, back weld. 0 Standard welding terms and. Change you use of "full depth partial penetration weld" to describe something that IS NOT a CJP. This is mainly because of the many and varied possible welding conditions that can be obtained with semiautomatic welding variables most often used with aluminum and. -it gives all the information necessary for preparing and/or welding joint. Gouging is necessary for many tasks related to welding when the operator is trying to remove material to get to clean metal. UNDERCUT GAUGE. MMA gouging differs because it requires special purpose electrodes with thick flux coatings to. 1, the contractor can require additional performance testing, i. ck '>---. Where a weld root's consistency cannot be guaranteed, back gouging techniques are used. Gouging is the term to define a type of corrosion which occurs on a metallic surface in which a hole, groove or indentation is created. 1/D1. Tee Joint – Full strength joint In a full strength joint, leg = 0. Uploaded by: Sudip. There are two types of CJP which should be understood clearly before going through the topic.