Welding Symbols & Positions

Learn to read welding symbols and understand welding positions with a clear, illustrated reference built for welding students, apprentices, fabricators and anyone preparing to read weld drawings.

Welding Symbols & Positions brings the essentials together in one app: welding symbols and their meanings, 1G to 6G welding positions, common weld defects, visual weld inspection, welding electrodes and the main welding processes. Every topic is explained in plain language with diagrams, and you can test what you learned with practice quizzes.

Welding Symbols
• 31 illustrated lessons on the welding symbol: reference line, arrow, tail, arrow side and other side
• Fillet weld, square groove, V groove, bevel groove, U groove and J groove symbols
• Supplementary symbols such as weld all around, field weld and weld contours
• Dimensions on drawings: weld size, weld length, pitch, intermittent welds, groove angle and root opening
• Switch between AWS-style and ISO 2553 conventions and see how the two systems differ

Welding Positions and Joints
• Plate groove positions 1G, 2G, 3G and 4G and fillet positions 1F, 2F, 3F and 4F
• Pipe positions 1G (rotated), 2G, 5G and 6G
• ISO positions PA to PG, plus H-L045 and J-L045
• The five basic joint types: butt, tee, lap, corner and edge
• Each position explains the plate or pipe orientation, travel direction, common mistakes and practical tips

Weld Defects and Inspection
• Common weld defects, including porosity, undercut, hot and cold cracking, lack of fusion, incomplete penetration, slag inclusion, overlap and spatter
• Visual weld inspection (VT) before, during and after welding
• An introduction to NDT methods (PT, MT, UT and RT) and to the limits of weld acceptance criteria

Welding Rods and Electrodes
• Electrode profiles for E6010, E6011, E6013, E7018 and E7024, plus stainless E308L-16, E309L-16 and E316L-16
• Electrode code decoder for carbon-steel and stainless stick electrodes and carbon-steel solid wire: enter a classification such as E6010, E7018-1 H4R, E308L-16 or ER70S-6 and see what each part of the code means
• Practical articles on MIG, TIG and flux-cored welding, shielding gases, tungsten types and welding safety

Types of Welding and Materials
• Welding processes explained, including SMAW (stick), GMAW (MIG/MAG), GTAW (TIG), flux-cored, submerged arc and resistance spot welding
• Welding basics for materials such as carbon steel, stainless steel, aluminium alloys, galvanized steel and copper alloys
• Side-by-side comparisons such as MIG vs TIG vs Stick

Welding Quiz
• Practice questions on welding symbols, positions, defects and electrodes
• Instant feedback with an explanation for every answer

Made for studying
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• Available in English, Portuguese and Spanish

Important notice
Welding Symbols & Positions is an independent educational reference. It is not affiliated with, endorsed by or certified by the American Welding Society (AWS), ISO or any other standards organization or certification body. The content is a learning aid and does not replace the official standards, your welding procedure specification (WPS), project requirements or the judgment of qualified welding and inspection personnel.