In this youtube Channel For Interview Question of QC Engineer, QC Inspector, Piping Inspector, Welding Inspector. also cover diffe... Facebook 5 Types of Welding Positions: 1g, 2f, 3g, 4g... - EZIIL The four basic welding positions are flat (1F/1G), horizontal (2F/2G), vertical (3F/3G) and overhead (4F/4G). Each letter tells yo... EZIIL Origin, Development, and Jurisdiction of the ASME Code ASME Boiler and Pressure Vessel Committee ... In the formulation of its rules for the establishment of design and operating pressu... www.webaero.net ASME Section IX: Unlock Expert Welding Standards - PetroSync Dec 1, 2025 —
In the context of ASME Boiler and Pressure Vessel Code (BPVC) — particularly Section IX (Welding, Brazing, and Fusing Qualifications) — a proper feature related to welding refers to a required characteristic or attribute that must be correctly addressed for a welding procedure or welder performance qualification. These features ensure the weld meets code requirements for strength, integrity, and inspectability. Here are the key proper features related to ASME Code welding:
1. Essential Variables For each welding process (e.g., SMAW, GTAW, GMAW, SAW), essential variables are features that, if changed beyond a specified range, require requalification of the Welding Procedure Specification (WPS). Examples:
Base metal thickness range Pipe diameter (for groove welds in pipe) Filler metal classification Heat input (for some materials) Preheat and interpass temperature range Postweld heat treatment (PWHT) asme code welding
2. Non-Essential Variables Features that can be changed without requalification (e.g., weld technique, oscillation, root gap within limits). 3. Supplemental Essential Variables Required for impact testing (e.g., material toughness requirements). These include:
Maximum interpass temperature Minimum preheat PWHT time/temperature
4. Weld Joint Features
Groove weld : Proper root opening, groove angle, bevel, land Fillet weld : Proper leg size, throat thickness, convexity/concavity Tack welds : Must be made by qualified welders, fused into final weld
5. Inspection & Testing Features
Visual examination : No cracks, incomplete fusion, undercut beyond limits (e.g., ≤1/32" for certain thicknesses) Bend tests : No open defects >1/8" in any direction Tensile test : Must exceed specified tensile strength of base metal Radiographic or UT : No relevant indications exceeding acceptance criteria (ASME Section VIII, Div. 1, UW-51 for full radiography) In this youtube Channel For Interview Question of
6. Welder Performance Qualification Features
Welding position (1G, 2G, 3G, 4G, 5G, 6G) Type of weld (groove vs. fillet) Diameter and thickness limitations Visual and mechanical test results