TITLE: Alignment of Table 3-6 and Figure 3-22

AGENDA ITEM: 650-552 Re.1

TITLE: Alignment of Table 3-6 and Figure 3-22

HANDLED BY: Bhana D. Mistry, TIW Steel Plate Work

Phone: 905 684 9421, Fax: 905 684 7310

E-Mail:

(Item was handled by J. Johnson earlier)

Revision: 1 Aug.28, 2007

SOURCE: Email 11/28/2001, K. Erdman of Matrix Services

PURPOSE: Correct the differences in reference table and Figure.

IMPACT: The business Impact is neutral.

TECHNICAL BASIS: Dimension HN in Table 3-6, column 8 applies to Appendix-A. This should be part of Appendix-A and not part of basic API-650. Delete all values of HN in column 8 of Table 3-6 and replace with revised foot note-d for basic API-650 design. Provide separate equivalent table in Appendix-A for Appendix-A tanks.

JUSTIFICATION: This agenda item will help better understanding and application of Table 3-6 and weld spacing rules.

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PROPOSED CHANGES:

(1) Revise Column 8 in Table 3-6 , deleting all distances and replacing with Foot Note-d

(2) Revise foot notes c and d under Table 3-6 as follows

Note: All Tables and Figure numbers are from API-650, 10 Th. Edition, 4Th. Addendum.

c : Low Type Reinforced nozzles shall not be located lower than elevation shown in Column-9. (Refer to 3.7.3.3 and Figure 3-22)

d: Regular Type Reinforced nozzles shall be located no lower than the highest distance derived from Column 9, 3.7.3, Fig.3-22 and any purchaser stipulated distances. Figure 3-5 and Figure 3-22 depict nozzle types.

(3) Add New Table A-7

Add revised Foot Note-c and d under Table A-7

c: Low Type Reinforced nozzles shall not be located lower than elevation shown in Column-9. (Refer to A.5.2 and Figure 3-22)

d: Regular Type Reinforced nozzles shall be located no lower than the highest distance derived from Column 8, A.5.2 and any purchaser stipulated distances. Figure 3-5 and Figure 3-22 depict nozzle types.

Revise A.5.2 (This revision is to address comment on 650-618 by Ron Baily)

A.5.2 The requirements of 3.7.3 for the spacing of welds do not apply except for the requirement that the spacing between the toes of welds around a connection shall not be less than 2 1/2 times the shell thickness at the connection i.e dimension A, B, C, E, F or G in Fig.3-22 shall not be less than 2 ½ times shell thickness.

Revise A.7.2

A.7.2 Shell nozzles and flanges shall conform to 3.7.6; Figures 3-4B, 3-5, and 3-7; and Tables A-A-7, 3-7 and 3-8.