CWB Welding Inspector Level 1 key terms

The examination of a weld and surrounding base metal using the naked eye, aided by tools such as magnifiers, mirrors, and gauges, to detect surface discontinuities and verify compliance with acceptance criteria.

The shape and dimensions of a weld's face or root, including cap height, width, toe angle, and undercut depth, which are evaluated during visual inspection against specified limits.

A groove melted into the base metal at the weld toe or root that remains unfilled by weld metal, reducing cross-sectional thickness and acting as a stress concentrator.

The height of weld metal above the base metal surface on a groove weld face, or above the weld root, which must fall within specified minimum and maximum limits.

The junction between the weld face and the base metal, where stress concentration is high and where discontinuities such as undercut and toe cracks commonly initiate.

An interruption in the normal physical structure or configuration of a weld, such as a crack, porosity, or inclusion, which may or may not be a defect depending on acceptance criteria.

A discontinuity or combination of discontinuities that, by code or specification, renders a weld or component unacceptable for its intended service.

The specified limits and conditions in a code or standard that define whether a weld discontinuity is acceptable or must be repaired or rejected.

A handheld tool with calibrated edges or fingers used to measure weld dimensions such as reinforcement height, leg length, throat thickness, undercut depth, and misalignment.

The junction of two or more members to be joined by welding, classified by configuration such as butt, lap, tee, corner, or edge joint.

An arc welding process using a consumable electrode covered with flux that melts to form shielding gas and slag, protecting the molten weld pool from atmospheric contamination.

An arc welding process using a continuous solid wire electrode and an externally supplied shielding gas to protect the weld pool, commonly used for high-deposition welding.

An arc welding process using a non-consumable tungsten electrode and an inert shielding gas, often with a separately supplied filler metal, known for precise control and high-quality welds.

A consumable or non-consumable component that conducts current and, in consumable electrode processes, melts to become part of the weld, often coated with flux in SMAW.

A gas or gas mixture supplied to the welding arc to exclude atmospheric oxygen and nitrogen, preventing porosity and embrittlement in the molten weld pool.

The electrical current flowing through the welding circuit, measured in amperes, which controls heat input, penetration, deposition rate, and electrode melting rate.

A welding process that uses an electric arc between an electrode and the workpiece to generate the heat needed to melt and join metals.

The amount of thermal energy introduced into the weld per unit length, typically calculated from voltage, current, and travel speed, influencing cooling rate and weld properties.

The localized volume of molten metal formed during welding that solidifies to become the weld, whose size and shape affect penetration, bead profile, and defect formation.

The application of heat to a base metal before welding to slow the cooling rate, reduce hydrogen cracking risk, and improve weldability, especially in thick or high-carbon steels.

A set of rules and requirements adopted by an authority for the design, fabrication, inspection, and testing of welded structures or components.

A document established by consensus that provides technical requirements, guidelines, or characteristics for activities or their results, often referenced by codes and contracts.

A written document that provides the welding variables and parameters required to produce a weld that meets specified requirements, and which must be followed by the welder.

A record of the actual welding variables used and the test results obtained during qualification of a welding procedure, which supports the corresponding WPS.

The process of testing and documenting a welder's ability to produce welds meeting specified requirements, often through visual and destructive or nondestructive testing of a test coupon.

The formal recognition by an independent organization that a person, product, or process meets specified requirements, often involving examination and periodic renewal.

A person qualified by training and experience to perform inspections of welding work, verify compliance with specifications, and document results, often certified by a recognized authority.

A documented strategy that defines the inspection activities, methods, stages, acceptance criteria, and responsibilities for verifying the quality of welded fabrication.

A failure of a product, process, or document to meet specified requirements, which must be documented and resolved through an approved disposition such as repair, rework, or rejection.

The process of removing and rewelding unacceptable portions of a weld or base metal to restore compliance with specified requirements, often requiring re-inspection.

Cavity-type discontinuities formed by gas entrapment during solidification of the weld metal, appearing as surface or subsurface pores that can reduce weld strength.

Nonmetallic solid material entrapped in weld metal or between weld and base metal, often from flux residue in processes such as SMAW, which can act as a stress concentrator.

A type of cold cracking that occurs after welding when hydrogen trapped in the weld metal diffuses and causes brittle fracture, often delayed and requiring preheat or low-hydrogen consumables.

The material being welded or joined, whose composition, thickness, and surface condition influence weldability, inspection requirements, and the selection of welding parameters.

The metal or alloy added during welding to form the weld deposit, supplied as electrodes, rods, or wire, and specified to match or enhance the properties of the base metal.

The organized records, reports, and certificates that provide objective evidence of inspection activities, qualifications, and compliance, supporting traceability and quality assurance.