Annex B In-service Welding- CWI Part C

Read Carefully and Take Test Annex B: In-service Welding B.1 General This annex provides welding practices for making repairs to and installing appurtenances on piping systems that are in service. Of particular importance are the welds that melt into the carrier pipe since they cool at an accelerated rate due to the quenching effect of … Read more

Section 10 Repair and Removal of Weld Defects- CWI Part C

Read Carefully and Take a Test Section 1 0: Repair and Removal of Weld Defects 0.1 General Paragraph 1 0.1 states that weld defects may be identified at any time. 1 0.2 Authorization for Repair Paragraph 1 0.2.1 states that company authorization is required for crack repairs, back weld repairs, and double repairs. Company authorization … Read more

Section 9 Acceptance Standards for NDT – CWI Part C

Read Carefully and Take a Test Section 9: Acceptance Standards for NDT 9.1 General This section presents acceptance standards for imperfections found by radiographic, magnetic particle, liquid penetrant, ultrasonic, and visual testing. NDT shall not be used to select welds that are to be destructively tested for welder qualification. 9.2 Rights of Rejection The acceptance … Read more

Section 8 Inspection and Testing of Production Welds- CWI Part C

Read Carefully and Take a Test Section 8: Inspection and Testing of Production Welds 8.1 Rights of Inspection The company shall determine whether inspection will be non-destructive or destructive, whether the inspection will occur during or after welding, and the frequency of inspections. 8.2 Methods of Inspection NDT will usually be radiographic testing but may … Read more

Section 7 Design and Preparation of a Joint for Production Welding – CWI Part C

Read Carefully and Take a Test Section 7: Design and Preparation of a Joint for Production Welding The purpose of Section 7 is to establish requirements for production welding. 7.1 General Production welding shall be performed only by qualified welders using qualified welding procedures. This paragraph identifies the cleanliness requirements for the surfaces to be … Read more

Section 6 Qualification of Welders – CWI Part C

Read Carefully and Take a Test Section 6: Qualification of Welders 6.1 General The purpose of welder qualification is to prove the welder’s ability to make sound welds using qualified procedures. Welders must qualify by testing before they perform any production welding. A welder who satisfactorily completes a welding procedure qualification test is also qualified … Read more

Section 4: Specifications – CWI Part C

Read Carefully and Take a Test Section 4: Specifications 4.1 Equipment This subsection calls for good judgment, sound engineering, suitable operating practices, and attention to safety in the operation of welding equipment. Arc welding equipment shall be operated within the voltage and current ranges specified on the welding procedure specification. Gas welding equipment shall be … Read more

Section 3 Terms, Definitions, Acronyms, and Abbreviations – CWI Part C

Read Carefully and Take a Test Section 3: Terms, Definitions, Acronyms, and Abbreviations For the purposes of this standard, the welding terms, and definitions in AWS A3.0 Standard Welding Terms and Definitions apply with the additions and modifications listed in subsection 3.1. Terms defined in AWS A3.0 are not defined again here. Additional key terms … Read more