1. Bill Bruce 30 June 2010 Appendix B Revisions for Twenty-First Edition of API 1104 Proposed Letter Ballots

2. © Det Norske Veritas AS. All rights reserved. Appendix B Revisions for 21st Edition of API 1104 30 June 2010 2 Proposed Revisions to Appendix B  Eight letter ballot items pertaining to revisions to Appendix B for Twenty-First Edition of API 1104 are proposed - Seven pertain to various technical issues discussed at New Orleans meeting in January - Eighth letter ballot pertains to incorporating weld deposition repair into Appendix B - Includes MS Word document of Appendix B revised using “Track Changes” and “Insert Comment” features  Proposed ballot items were developed by a working group established at New Orleans meeting  Have since been distributed to Maintenance Welding sub-committee members  No comments were received - Ready for discussion

3. © Det Norske Veritas AS. All rights reserved. Appendix B Revisions for 21st Edition of API 1104 30 June 2010 3 Proposed Revisions Pertaining to Various Technical Issues  Proposed revisions include: - Clarify the definition of in-service weld as being welds that include fusion into the carrier pipe - Heat input ranges for each layer to be specified for procedures using temper bead - Procedures that rely on tempering and weld deposition sequence should include tolerance for bead spacing to assure tempering - Carbon equivalent for pipe and attachments is an essential variable - For in-service fillet welds, SMYS is not an essential variable - For non-fillet welds, the completed weld should meet or exceed the SMYS of the pipe. - A change in the bead spacing beyond the limits specified in the WPS constitutes an essential variable - Determine the maximum hardness of the coarse grained HAZ of the pipe and attachment - For temper bead procedures, include requirement for welder to demonstrate the ability to make welds within the specified heat input range

4. © Det Norske Veritas AS. All rights reserved. Appendix B Revisions for 21st Edition of API 1104 30 June 2010 4 Proposed Revisions to Incorporate Weld Deposition Repair  Weld deposition repair is a useful pipeline repair technique for applications where repair by welded full-encirclement sleeves and fiber reinforced composites is difficult or impossible, such as corrosion-caused loss of wall thickness in bend section, elbows, and tees  The use of this technique is addressed in ASME B31.4, ASME B31.8, CSA Z662, and ASME PCC-2  Proposed revisions include: - Procedure and welder qualification - Essential variables - What test welds need to be made - How many test specimens need to be extracted - What tests the specimens should be subjected to - Suggested in-service welding practices for weld deposition repair  Letter ballot consists of MS Word document using “Track Changes” and “Insert Comment” features

5. © Det Norske Veritas AS. All rights reserved. Appendix B Revisions for 21st Edition of API 1104 30 June 2010 5 Safeguarding life, property and the environment www.dnv.com