Welding procedure specification wps yes prequalified. Structural steel welding complete, cut out and present the certificate of competency structural steel welding card below to the person who passed the weld test proof of competency. It is important to note that a number of amendments and corrigenda have now been. Welding on metal that is wet is strictly prohibited. How to write a welding procedure specification wps. If u are changing something consumable, electrical parameters etc. However, the nature and use of a wps, and its supporting procedure qualification record pqr, are commonly misunderstood. Ch9mvn01 consumables base material welding process root. Types 405, 409, 430, 422 and 446 are representative of this group. On the other hand, a pqr is like a checklist with blank lines and spaces for written notes that will be filled out by the inspector during the inspection. Slagboy enterprises authorized by samuel slaghammer oct 28, 2011 welding. The attached data sheets form an essential part of this specification. Welding positions are quite important, and you should plan for them ahead of time. The electrode and the work are part of an electric circuit.
The welding house the wps and the pqr are developed concurrently rough draft the wps to determine how to do the pqrs more than one pqr may be required to fully support the wps e. The end of contact tube recommended to be recessed in the cup nozzle at least 6 mm 14 in. Welding procedure specificaton wps btc gmaw 9010 2011 prequalified per aws d1. Manual welding with equipment that automatically controls one or more of the. How to create welding procedure specification wps and. Understand the intended application for which the wps will be used 2. Qualification of a wps to bs en iso 156141 typically requires the formulation of 3 core documents a preliminary welding procedure specification pwps, a welding procedure qualification record wpqr and a welding procedure specification wps. Jun 06, 2016 how to write a welding procedure specification iso 156141 one of the most important documents in regards to welding is the wps welding procedure specification and many people working with wps look at them like they are just an issue, or something that only the engineers and quality control technicians have to worry about, but is it a hard thing to create andor look at. Only filler metal categories with the same fnumber and same anumber tested in pqr. A wps is usually filled with numerous texts, images, and sentences in accordance to its being an instructional guide. For nonmandatory conditions of pwht, see notes 1, 2 of table pw39 wps qualified range asme ix guideline.
Wps presentation download support ppt and pptx files wps. Experience gained from user contact and welding training of crewmembers showed that. The art and science of joining metals by using the intrinsic adhesive and cohesive forces of attraction that exist within metals. Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. Explains how to use notes on drawings and the bill of materials. You wouldnt want an inspector to come to your shop floor and order you to stop using a 15mm wps because the welder is welding a 15. Welding, brazing, soldering does not include mechanical fastening such as bolts, rivets, screws, etc. The primary alloying additions are chromium and nickel. Most wps will be backed on a pqr procedure qualification record and this. When submitting wpds for the first time, welding procedure specification will also be submitted along with wpdss.
Gas metal arc welding gmaw, by definition, is an arc welding process which produces the coalescence of metals by heating them with an arc between a continuously fed filler metal electrode and the work. This document is produced by the welding engineer in order to ensure the quality and correct design output of the weld. For impact test application, there are some restrictions for welding in verticaluphill progression position. Wpspqr explained american welding society education online. Steel girder bearing plate welding procedure wps 2. The pwps is a preliminary document based on the knowledge and or past experience of the rwc. Wpss are prepared based on the requirements for the practical welding work and the required standards and. More than one pqr may be required to fully support the wps e. Csa standard w59 may be referenced when joining stainless steel to carbon steel.
A welding procedure specification, or wps, is a document that serves as a guide for the effective creation of a weld that meets all applicable code requirements and production standards. Welding can be done without the use of a filler metal by the use of heat energy alone. Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. Ferritic stainless steels are nonhardenable fecr alloys. Dec 28, 2014 cswip welding inspection notes and questions 1. Stainless steels austenitic stainless steels include the 200 and 300 series of which type 304 is the most common. Resistance welding 23 pages, 25 figures basic level prepared by lutz dorn, technische universitat, berlin objectives. The key document is the welding procedure specification wps which. Free download wps office 20162019 for pcandroidios. Another difference is the orientation of the documents contents. Welding is a dependable, efficient and economic method for. Where required by the contract drawings or specifications, welded assemblies shall be stress relieved by heat treating. Find materials for this course in the pages linked along the left. Welding procedure specifications wps allow welders to consistently produce welds that meet desired requirements without any rework.
The welding process welding is a process for joining or fastening two pieces of similar metals workpieces by melting and fusing 1 the base metals being joined and 2 the filler metal applied. The safest way to go at it is to put them all in your wps, as it is approved by the pqr, but the best way to proceed is to define which are the. Guide to understanding welding procedure specification. Welding procedure specification wps before any welding activity can commence, the welder and the qc engineer has to be fully aware of the content of the welding procedure specification, wps. User can also enter a different wpds and wps number if desired. Date joints qw402 details joint design base metals qw403 pno. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas.
Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of the metals which are usually welded. If you are using a manual welding process, you cannot control the. Wps understanding part 1 general technical knowledge. Articles how to write a welding procedure specification wps. With wps offices builtin savetopdf tool you can make documents smaller, more secure and easier to share. Mar 18, 2016 american welding society aws has taken the lead in the welding industry with alternative methods to developing a welding procedure specification wps. Welding procedure specification wps may be generated by an authorized person i. 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. Pwht requirements shall be based on welding procedure specification wps. Weld a test piece in accordance with the requirements of your specification.
Gasshielded arc welding of aluminium gasshielded welding can be divided into the tungsten gasshielded welding and the. Joint type detail amperage range volts range electrical stickout. The welding process and electrodes must be suitable for all positions permitted by the wps asme section ix, qw203. Topic welding industry technical discussions asme welding codes and ownership of wps by kgv date 04112006 12. The joint set up, welding and visual examination of the completed weld should be witnessed by a certified welding inspector such as an aws certified cwi or an inspection body. Scf9201 consumables base material welding process root. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece.
This welding procedure specification covers welding and related operations of stainless steel, which are fabricated in accordance with csa w47. Any combination of shielding gas with wire needs to be cwb certified. No process inventor year country 1 oxy acetylene welding hendry louis chatelier 1895 france 2 electric arc theory davy 1809 england 3 arc welding process augastedemeritens 1881 england 4 carbon arc bernodosolszewski 1887 russia 5 bare wire electrode ng slavianoff 1892 germany 6 covered electrode oscar kiellberg. Welding where in entire welding operation is performed. Additional filler material is typically added to strengthen the joint.
Welding procedure specification wps welding procedure no. Preheat requirements shall be based on welding procedure specification wps. Pdf welding procedure specification wps asme boiler. This is often done by melting the workpieces and adding a filler material to form a pool of molten material the weld pool that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. Reading welding detail drawings 10 hours isbn 97804179537 module id 2920215 identi. A welding procedure specification wps sets broad guidelines for the shop and field. This online course provides a comprehensive overview of these documents in an engaging. Wps presentation download support ppt and pptx files.
The purpose of the document is to guide welders to the accepted procedures so. What is welding procedure specification wps a welding procedure specification wps is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements. The process uses shielding from an externally supplied gas to protect the molten weld pool. Processes 215994 f 201801 guidelines for gas tungsten arc welding gtaw tig gtaw welding for product information, owners manual translations, and more, visit. Scribd is the worlds largest social reading and publishing site. E i2rt where e is the heat energy, i is the current, r is the electrical resistance and t is the time that the current is applied. For welding tasks in pressure systems and steel structures, it isrequired that the wps refers to a welding procedure. Unless specifically required otherwise by the welding variables qw250, a qualification in any position qualifies the procedure for all positions. Lecture notes welding and joining processes materials. No process inventor year country 1 oxy acetylene welding hendry louis chatelier 1895 france 2 electric arc theory davy 1809 england 3 arc welding process augastedemeritens 1881 england 4 carbon arc bernodosolszewski 1887 russia 5 bare wire electrode ng slavianoff 1892 germany 6 covered electrode oscar kiellberg 1907 sweden covered electrode with 7 asbestos. Wps qualified by mechanical testing pqr is documentation to prove that a weld can be made using the procedure and have acceptable mechanical properties how do you qualify a welding procedure. A weld is made when separate pieces of material to be joined combine and form one piece when heated to a temperature high enough to cause softening or melting.
Form qw482 suggested format for welding procedure specifications wps see qw200. With wps offices builtin saveto pdf tool you can make documents smaller, more secure and easier to share. Weldproc software automatically populates wpds and wps numbers for easier tracking. Produce a welding procedure specification wps as stated above. In the same way that a recipe for a cake details what ingredients and quantities youll need, a wps contains details. Slagboy enterprises authorized by samuel slaghammer oct 28, 2011. When higher preheat is required by the applicable construction code i. Enjoy over 50 predefined keyboard shortcuts for writer, presentation and spreadsheets. Always use a range of thicknesses and diameters though, even if they are a bit strict.
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