Following are general changes requiring a requalification for smaw process based on table 6. Constant current smaw machines are either ac, dc or acdc. Shielded metal arc welding smaw a process that welds by heat from an electric arc between a fluxcovered metal electrode and the work. Steve, need some more information, what is the welding process tig gmaw or stick smaw carbon or stainless. This subject is very complicated and only these precautions related to arc welding will be discussed in this brochure. Wdt 108 smaw filletofc 3 wdt 109 smaw filletpaccac 3 wdt 110 industrial blueprint reading 3 wdt 115 gtaw carbon pipe 3 wdt 116 gtaw stainless pipe 3 wdt 119 gas metal arcflux cored arc welding 3 wdt 120 shielded metal arc welding groove 3 wdt 122 smaw filletofc lab 3 wdt 123 smaw filletpaccac lab 3 wdt 124 gas metal arcflux cored arc. Prepare smaw equipment for openroot vgroove pipe welds.
Welding with equipment that requires only occasional or no observation of the welding. Are you estimating a big job and plan on inputing the time that you and your managment come up with, anyway be careful i was. Welding technology pipe tube welding shortterm certificate. The stable arc, even at low welding currents, makes the electrode very suitable for sheet metal. Experience gained from user contact and welding training of crewmembers showed that. Downhill root, uphill fill and cap mig monday duration.
This adds significantly to the weld time of small diameter pipe and was not included in the chart. Welding procedure specification for shielded metal arc welding of steel pipe and fittings. Wldg,,, select one approved elective from group 1 listed below 4. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld. Weldingrelated expenditures, investments, and productivity. The normal procedure is to grind the root pass to eliminate the excessive convexity.
Applying shielded metal arc welding smaw techniques. One routine use of smaw is for joining pipe of various thicknesses and diameters. Also need to take into consideration handling, cutting, prepping, labor climate, some welders are fasterslower then others etc. Wldg 2443 advanced shielded metal arc welding smaw 5 4. Teaching of asme ix code to students of gtaw, gmawfcaw, smaw and saw welding processes article pdf available in journal of materials education 3912. Welding with equipment that requires manual adjustment of the equipment controls in response to visual observation of the welding, with the torch, gun or electrode holder held by a mechanized device. Automated welding work cell for pipe spool prefabrication. In gas shielded arc welding, both the arc and the molten puddle are covered by a shield of inert gas. Shielding comes from the decomposition of the electrode covering.
Techniques for welding hot passes after the root pass is welded, the root bead is generally very convex on the exterior of the pipe. Specifications should require the welding subcontractor to be qualified for the project, such as requiring a minimum experience of three separate projects exceeding 60 dia. This is a demowps prepared by online welding software of. The pri mary gases used for this process are helium, argon, or carbon dioxide. A cc power source is one in which current or amperage remains constant even for changes in welding voltage. Mar 04, 2015 direction of welding is vertical either with upward or downward progression. Smaw smaw e9018 e9018 332 18 18 18 70 160 14 24 3 9 0 0 0 to weld layers are representative only actual number of passes and layer sequence may vary due to variations in joint design, thickness and fitup.
What can be done to manage the hazards associated with smaw. Check and be sure the area is safe before doing any welding. Student must make an appointment with the welding technology department for an interview and bennett mechanical aptitude testing. Chapter 3 introduction to welding in the navy as well as private industry, welding is widely used by metalworkers in the fabrication, maintenance, and repair of parts and structures. Sureweld 710p is recommended for welding api grades x46, x52, and x56 pipe. In india nearly 90% of the welded fabrication is done by this process and even in the most advanced countries like usa, ussr, japan, and the west european. Ppt smaw welding powerpoint presentation free to download. Constant current cc power sources are used in the smaw process. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems.
Students will demonstrate competency in shielded metal arc welding. History of welding the art of welding is an ancient one but the science of shielded metal arc welding is relatively new. The ticket below indicates that a minimum pipe diameter qualifed is 25 mm od. Shielded metal arc welding is one of the most versatile joining processes in industry and it is extensively used the world over. For manufacturers of orbital pipe welding equipment it is not wise to make specific statements about weld times, without knowing the exact particulars about the welding application. There are four main pipe welding positions, numbered 1, 2, 5 and 6. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld an electric current, in the form of either alternating current or direct current from a welding power supply, is used to form an. The brain that contains the problem probably also contains the solution. Manual welding with equipment that automatically controls one or more of the welding. Lincoln electric supplies electrodes, power sources, automatic and semiautomatic wire feeders, submerged arc wire and flux, which are the industry standards for pipeline construction around the world. Covering bevel setup, tack welding, e6010 open root, e7018 hot pass and cap. Pipe welding and everything you need to know how to stick weld pipe to pass a 6g open root pipe welding certification. Comparing any pipe welding task against another is usually a very difficult task unless all the particulars of the application are known.
Pdf teaching of asme ix code to students of gtaw, gmaw. The advantage for doing this was welding the root pass in a composite sa210 a1 core with 3048 clad window weld. Smaw stainless steel pipe welding is a more advanced method of welding than smaw carbon steel and requires special training specific to stainless steel metals which can lead to even higher pay. Also known as stick welding, flux shielded arc welding and manual metal arc welding mmaw, this is a relatively uncomplicated process as it uses simple equipment and its fairly straightforward to learn.
Mte 12 or mac 111 2 sp wel 124 shielded metal arc welding advanced prerequisite. The equipment is relatively simple, inexpensive, and portable. Weld 3b smaw stick 4 weld 4b gtaw tig 4 weld 5b gmaw mig 2 weld 7b fcaw flux core 2 weld 154b d1. Tig welding walking the cup pipe welding 2 12inch sch80 carbon steel pipe duration. Stick welding shielded metal arc welding or smaw although mostly considered archaic nowadays, especially when compared to the tig and mig, shielded metal arc welding, or stick welding, is a manual welding technique that relies on a consumable electrode coated in flux that is then used to lay the weld.
Weld steel pipe in 6g using smaw linkedin slideshare. Understand and apply math skills as they relate to welding module 3. Incorrectly installed or improperly grounded equipment is a hazard. What are the principle hazards associated with smaw. Pipe lowered to proper grade and pulled into alignment. Welding lecture hours shoplab hours acetylene cutting 5 20 plasma cutting 5 20 smaw stick welding 20 85 smaw stick plate welding 20 85 smaw stick pipe welding 20 85 gmaw mig welding 20 85 gtaw tig welding 20 85 gtaw tig plate welding 20 85 gtaw tig pipe welding 20 85 blueprint reading 30 flux cored arc welding fcaw 5 20. Xray quality joints can be produced with sureweld 710p using flat, horizontal, overhead, verticalup and verticaldown welding procedures. The user should compare the weld times and the weld data used against their own application. The welding voltage changes as changes in arc length occur. The smaw process is better suited for these type of welds since the joint. For the pipe and tube welding shortterm certificate in welding technology, the student must complete 28 of the 43 credit hours listed above. With detailed accurate information and pictures of the electrode angles, machine setup, pipe welding techniques, and the entire welding certification from start to finish. Wear dry, holefree insulating gloves and body protection. Wel 2 f spring semester drf 166 welding blueprint reading prerequisite.
Welding subcontractor or welders are inexperienced with production welding of steel pipe. The pipe welding bureau recommends that 2 38 od 2 nps pipe be used for this. Manufacturing, construction, and mining industries in which welding is considered a critical enabling technology. Identify and explain openroot vgroove pipe weld techniques with smaw equipment. Certification in this technique will qualify welders for high placement and high levels of pay. Oct 11, 2012 tig welding walking the cup pipe welding 2 12inch sch80 carbon steel pipe duration. Pipe is laid bell onto spigot pipe is engaged at about a 10 degree angle. The electrode and the work are part of an electric circuit. All welding parameters and requirements found in the paragraphs and tables of. Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. Shielding is obtained from decomposition of the electrode covering. This specification covers the welding of piping used in gas, steam, electric and. Depending on the type shielding gas, this process is of also known as co. Apply your skills to careers in manufacturing, construction, aerospace, shipbuilding, pipe.
Chiping, grinding smaw e7018 140 to to to to to to varies 3 12 gmawfcaw tube to work distance. The shield of inert gas prevents atmospheric con tamination, thereby producing a better weld. This booklet is a guide to welding pipe with shielded metal arc welding smaw and double ending pipe using automatic welding. As an example, many users require a manual gtaw root pass to their manual welds. Guidelines for shielded metal arc welding smaw warning this document contains general information about the topics discussed herein.
Daytona state college offers an industry recognized certi. As an example, any change to the following essential variables for performance qualification with shielded metalarc welding smaw will require requalification. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece. Stick smaw welding 155 095 a july 2005 visit our website at. Smaw is a wellestablished form of welding used extensively in commercial and industrial applications around the world. Shielded metal arc welding, aws designation smaw, is also commonly called arc welding, stick welding and stick electrode welding although there had been initial work on arc welding in the 1700s using carbon electrodes powered by. Affordable and search from millions of royalty free images, photos and vectors. This is pretty much just flat welding because the pipe will be lying on its side on the curved edge and can be rotated as you weld. Shield metal arc welding is an arc welding process that uses a consumable electrode to initiate the arc and provide the filler material. Welding with the torch, gun or electrode holder held and manipulated by hand. The 1g position isnt used very often, but its still important to recognize it. Stick welding application shielded metal arc welding is one of the most widely used processes, particularly for short welds in production, maintenance and repair work, and for field construction. Wel 123 or instructor approval 3 sp eng 100 occupational english 3 sp wel 126 pipe welding i corequisite. Accessory equipment, such as part motion devices and manually controlled filler material feeders may be used.
When arc welding in a confined area, such as a boiler, tank, or the hold of a ship, bear in mind that all the hazards associated with normal arc welding are amplified, so the precautions mentioned here are even more important. Smaw welding, which stands for shielded metal arc welding, is one of the worlds most popular welding processes. Module one 29301 presents shielded metal arc welding smaw of openroot pipe joints. The good lowing properties of the weld metal give a good inish to the weld beads on both butt and illet welds. Shielded metal arc welding smaw also known as stick welding is an arc welding process which produces coalescence by heating with an electric arc between a covered metal electrode and the surface of the base metal. Objectives upon completion of this module, the trainee will be able to do the following.
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