AWS CWI Part B - Module 1 (Contents and PPT)

Module 1 - Clause 1 

1.0 General Requirements

1.0 General : Part B  includes a review of the Book of Specifications, analysis and application of WPSs and PQRs, extensive hands-on learning with inspection tools and high-quality plastic weld replicas, and a full-length, timed practice examination and access to additional online resources and practice questions are also included.

1.1  Scope

1.1.1 This specification applies to the American Welding Society Certified Welding Inspector (CWI) examination and shall not be used for any other purpose. The CWI Practical Exam relies on the use of molded plastic replicas of actual weld specimens and as there are some visual characteristics of metal that do not reproduce in plastic with sufficient fidelity, the exclusion of acceptance criteria for these characteristics should not be construed as an endorsement for the exclusion of these criteria for any actual fabrication.

1.1.2 This specification includes representative requirements for Structural Steel, Pipeline, and Pressure Piping applications. They are intended to be applied to inspector examination weld replicas and not to actual industrial facilities, equipment, or structures.

1.1.3  Unless otherwise noted, requirements contained in this Book of Specifications, in Clauses 1.0, 5.0, and 6.0, are to be considered general requirements applicable to all three applications.

1.1.4  Normative Annexes in this specification are provided for requirements and Informative Annexes are provided for information. Both are considered as part of this specification. No inference should be drawn from the assignment of Normative versus Informative as to the use of the Annex on the examination.

1.1.5  Calculations, formulae, definitions, and material properties used on the CWI examination will be based on data published in the Annexes to this specification. As this Book of Specifications applies to three applications, terms and definitions are not limited to AWS A3.0, Standard Welding Terms and Definitions.

1.1.6 Use of the terms “shall,” “should,” and “may” in this specification have the following significance: Shall.  Specification provisions that use “shall”  are mandatory. Should. Specification provisions that use “should” are non-mandatory practices that are considered beneficial.  May.  Specification provisions that use “may” mandate the choice of optional procedures or practices that can be used as an alternative or supplement to specification requirements.

1.2  Visual Inspection

1.2.1 Visual inspection for cracks in welds and base metal and other discontinuities may be aided by a strong light, magnifier, and mirror as may be found helpful or necessary.

1.2.2 Weld sizes, length, and locations of welds shall conform to the requirements of this specification.

1.2.3 Joint preparations, assembly, and welding techniques shall be verified.

1.2.4 Suitable measuring tools and gages shall be used where necessary.

1.3  Dimensional Tolerances

Unless otherwise specified, the following standard dimensional tolerances shall apply when using this specification. They do not apply to the dimensions in test specimens, Annex IV, or to discontinuity acceptance limits.

1.3.1 Decimal tolerances are determined by the number of decimal places (precision) used in the dimension as follows:


±  0.3

(e.g,, 1.0 mm could be 0.7 to 1.3 mm)


±  0.13

(e.g., 1.00 mm could be 0.87 to 1.13 mm)


1.3.2 Whole number tolerances are determined by the overall dimensional length used in the dimension as follows:

Whole numbers > 150 mm                                        ± 3 mm

Whole numbers from 25 to 150 mm inclusive           ± 1.5 mm

Whole numbers from 1 to < 25 mm                           ± 0.8 mm