[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-662688-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-662688-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","welding-ndt-symbols","WELDING & NDT Symbols","","Welding & NDT Symbols introduces how welding requirements and non-destructive testing needs are communicated on engineering drawings using concise symbolic representation. It explains why vague instructions like “weld here” are risky, and how specifying welds design-side helps ensure the correct weld type and size for parent material and service conditions. The presentation covers key standards (AWS A2.4, ISO 2553, EN 22553), the purpose of symbols, and the basic structure of welding symbols using reference lines and arrows.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/welding-ndt-symbols/662688/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/welding-ndt-symbols/662688.png","ImageObject",300,407,{"name":42,"@type":43},"Mabel","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-10-28",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",5,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"Why is specifying welds on drawings important?","Question",{"text":63,"@type":64},"Relying on the welder to choose a suitable weld can be extremely risky because weld type and size must match the parent material and service conditions. The necessary information is normally available only in the design office.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What do the main welding symbol components represent?",{"text":68,"@type":64},"All welding symbols use two basic parts: a reference line (horizontal) and an arrow (inclined toward the joint). The tail designates welding and cutting process and related specifications or supplementary information.",{"name":70,"@type":61,"acceptedAnswer":71},"How are additional references used to clarify welding symbols?",{"text":72,"@type":64},"When a specification, process, test, or other reference is needed, it is placed in the tail of the welding symbol to clarify the requirements.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},662688,1793221737,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,100,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":102,"slug":103},6,50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":55,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":101,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":80,"read_time":144},7971474920318,"https://ap-avatar.wpscdn.com/avatar/74000ee537e6b0ca360?x-image-process=image/resize,m_fixed,w_180,h_180&k=1788430171632181674","By: Kamran Khodaparasti  \n􀂃 This presentation was developed to provide readers with a general introduction to welding & NDT symbols.  \n􀂃 Comments are welcome at [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com)  \n􀂃 Please ask your questions about this topic and all aspects of welding via:  \n􀂃  [http://forum.weldeng.net](http://forum.weldeng.net)  \n􀂃 References:  \n􀂃 R.S. Parmar, Welding Engineering and Technology, 2005, pp.837‐866  \n􀂃 AWSA2.4, Standard Symbols for Welding, Brazing, and Nondestructive Examination, 2007  \n􀂃 ISO 2553, Welded, Brazed and Soldered Joints‐ Symbolic Representation on Drawings, 1992  \n􀂃 E. N. Gregory andA. A. Armstrong, Welding Symbols on Drawings, CRC Press, 2005  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 2  \n􀂃 It is sometimes argued that it is unnecessary to specify welds on drawings and that the welder should be relied upon to deposit a suitable weld. This practice can be extremely risky because the type and size of the weld must be appropriate for the parent material and service conditions of the fabrication, and the necessary information and data are normally available only in the design office.  \n􀂃 that major problems will arise unless welded joints are carefully specified by the design office. The situation is particularly critical where, for example, work is placed with a subcontractor and the instructions need to be especially precise.  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 3  \n􀂃 The instruction ‘weld here’ is rarely seen on a drawing because it is open to a number of different interpretations.  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 4  \n􀂃 When it is required to indicate desired welding information on engineering drawings, it may seem that the weld can simply be drawn as it will appear. In the majority of cases, symbolic representation can be used to cut down the time needed to complete the drawing and improve clarity.  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 5  \n􀂃 Symbols are used to convey the design requirements to the shop in a concise manner.  \n􀂃 American (AWSA2 .4)  \n􀂃 International (ISO 2553)  \n􀂃 Also EN 22553 (identical to ISO 2553)  \n􀂃 In the UK ‘weld symbol’ and ‘welding symbol’ are interchangeable by common usage but in the American standard on symbols they have different meanings.  \n􀂃 A weld symbol required type of weld, and the basic weld symbols.(basic V, U or triangle, representing, respectively, single‐V, single‐U or fillet welds)  \n􀂃 The welding symbol includes the weld symbol and supplementary information.(a reference line to which the weld symbols can be added and an arrow line pointing to the position of the welded joint. Additional elements may be added such as weld sizes and lengths, welding process and non‐destructive testing requirements, which all contribute to the welding symbol)  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 6  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 7  \n􀂃 All welding symbols have 2 basic parts:  \n􀂃 A reference line ( is always horizontal)  \n􀂃 An arrow ( is always inclined to the reference line at one end)  \n􀂃 The tail of the symbol is used for designating the welding and cutting process as well asthe welding specifications, procedures, or the supplementary information to be used in making the weld (omitted when reference is not used)  \n􀂃 The arrow points to a spot on drawing where the welding is to be done.  \n􀂃 The reference line has two sides:  \n􀂃 Other side, above the line  \n􀂃 Arrow side, below the line  \nWelding & NDT Symbols [kkhodaparasti@yahoo.com](kkhodaparasti@yahoo.com) 8  \n􀂃 When a specification, process, test or other references is needed to clarify a welding symbol, the reference is placed in a tail on the welding symbol.  \n􀂃 Including the basic 2 elements (reference line & arrow) , a welding symbol may consist of the following 8 elements:  ","cbCaijY16TmKNC1c","https://ap.wps.com/l/cbCaijY16TmKNC1c","pdf",2347847,79,"English","# Welding and NDT Symbols Introduction\n## Why welds must be specified on drawings\n## Standards for welding and NDT symbols\n# Structure of welding symbols\n## Reference line and arrow\n## Tail and reference placement\n## Elements that make up a welding symbol","[{\"question\":\"Why is specifying welds on drawings important?\",\"answer\":\"Relying on the welder to choose a suitable weld can be extremely risky because weld type and size must match the parent material and service conditions. The necessary information is normally available only in the design office.\"},{\"question\":\"What do the main welding symbol components represent?\",\"answer\":\"All welding symbols use two basic parts: a reference line (horizontal) and an arrow (inclined toward the joint). The tail designates welding and cutting process and related specifications or supplementary information.\"},{\"question\":\"How are additional references used to clarify welding symbols?\",\"answer\":\"When a specification, process, test, or other reference is needed, it is placed in the tail of the welding symbol to clarify the requirements.\"}]","WELDING & NDT Symbols | PDF",199]