ASME B16.48-2005 pdf download

ASME B16.48-2005 pdf download.Line Blanks.
1.1 General
ASME B16.48 covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for operating line blanks in sizes NPS through NPS 24 for installation between ASME B16.5 flanges in the 150, 300, 00 900, 1500, and 25(X) pressure classes.
1.2 DefinItions
1.2.1 Flgure-8 Blank. A Iigure-8 blank (also called a spectacle blank) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar (see Fig. 1).
1.2.2 Paddle Blank. A paddle blank is similar to the solid end of a figure-8 blank It has a plain radial handle. It is generally used in conjunct ion with a paddle spacer in large sizes.
1.2.3 Paddle Spacer. A paddle spacer is similar to the open end of a figure-8 blank. It has a plain radial handle. It is generally used in conjunction with a paddle blank.
1.3 References
Codes, standards, and specifications. containing provisions to the extent referenced herein, constitute requirements of this Standard, These reference documents are listed in Nonmandatory Appendix B.
1.4 Quality Systems
Nonmandatory requirements relating to the product manufacturer’s Quality System Program are described in Nonmandatory Appendix C.
1.5 Relevant Units
This Standard states values in both Metric and US. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parenthesis or separate tables. Refer to Nonmandatory Appendix A. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard. Nonmandatory Appendix A provides dimensions in U.S. Customary units.
4.4 Facing Finish
Facing finish shall be in accordance with ASME 816.5, para. 6.4.5.
5 MATERIALS
Materials for line blanks shall be in accordance with ASME B16.5, Table 1-A, and shall include material restrictions cited in notes to Tables 2 or F-2 of ASME B16.5. Recommended bolting materials for flange-blank assemblies are listed in ASME B16.5, Table 1-B,
Criteria for the selection of materials are not within the scope of this Standard.
6 MARKING
6.1 General
(a) line blanks shall be marked as follows:
(1) Manufacturer’s name or trademark
(2) Material, specification, and grade or class
(3) Pressure class
(4) B16
(5) Size (NI’S)
(6) Ring number (if applicable)
(l) Where space does not permit all of the above markings, they may be omitted in the reverse order given in 6.1(a).