API 1104Errata_Add2007附录A.pdf

Date of Issue: July 2007 Affected Publication: API Standard 1104, Welding of Pipelines and Related Facilities, October 2005. ERRATA/ADDENDUM Please insert the following changes to Std 1104: Section 3.2.2, Change: “branch weld: The completed weld joining a branch pipe or branch fitting to a run pipe.” to “branch weld: The completed groove and/or fillet weld joining a set on or set in branch pipe or a set on or set in branch fitting to a run pipe.” Please replace Appendix A with the following attachment: 1 APPENDIX A—ALTERNATIVE ACCEPTANCE STANDARDS FOR GIRTH WELDS A.1 General and its consistency could be significantly less than Options 1 and 2. Option 3 should only be exercised, when neces- The acceptance standards given in Section 9 are based sary, by skilled practitioners with demonstrated knowledge on empirical criteria for workmanship and place primary of fracture mechanics and pipeline load analysis. With importance on imperfection length. Such criteria have pro- these three options this current revision of the appendix vided an excellent record of reliability in pipeline service should provide a more complete approach to determine for many years. The use of fracture mechanics analysis inspection and acceptance limits for imperfections. and fitness-for-purpose criteria for determining acceptance It is usually impractical to qualify individual pipeline criteria is an alternative method and incorporates the eval- welds for the alternative acceptance limits after a defect under uation