A: 1/8 inch (3 mm) for material under 1 inch; for 1 inch exactly, 3/16 inch (5 mm). (This type of question appears in Part A – Fundamentals; Part C requires you to look up the exact table.)
CWI holders can add “9-Year Recertification” or specific code endorsements (e.g., D1.5 Bridge Welding). 3. Detailed: CSWIP Welding Inspector (TWI) Common in Europe, Middle East, and offshore industries.
PCN separates welding inspection from NDT methods. You may need PCN in Visual Testing (VT) plus specific sector modules (e.g., wrought products, castings, welds).
Welding inspector certification is a formal validation that an individual possesses the knowledge, skills, and ability to inspect welded joints, verify compliance with codes and drawings, and report findings. It is not a single certificate but a tiered system based on experience and exam difficulty. | Body | Certification Name | Primary Region | Key Feature | | :--- | :--- | :--- | :--- | | AWS (American Welding Society) | CWI (Certified Welding Inspector) | Americas, Global | Most recognized in N. America; requires endorsement for codes. | | TWI (The Welding Institute) | CSWIP (Certification Scheme for Welding & Inspection Personnel) | Europe, Middle East, Asia, Global | Strong international recognition; 3 levels (1, 2, 3). | | BINDT (British Institute of NDT) | PCN (Personnel Certification in Non-Destructive Testing) | Europe, Oil & Gas | ISO 9712 based; often required for specific NDT methods. | | API (American Petroleum Institute) | API 577 (Welding Inspection & Metallurgy) | Oil & Gas, Refineries | Focused on welding for pressure vessels, piping, tanks. | | IIW (International Institute of Welding) | IWI (International Welding Inspector) | Global (via authorized bodies) | Standardized framework; levels: Basic, Standard, Senior. | 2. Detailed: AWS Certified Welding Inspector (CWI) The most widely held welding inspector certification globally.