ASME B16.48:2020 pdf free download

ASME B16.48:2020 pdf free download.Line Blanks.
ASME B16.48 covers pressure-temperature ratings. materials, dimensions, tolerances, marking, and testing for operating line blanks in sizes NI’S .4 through NI’S 24 for installation between ASMF. B16.5 flanges in the 150, 300, 600, 900, 1500, and 2500 pressure classes.
2 GENERAL
2.1 Definitions
2.1.1 FIgure-B BLank. A tIgure.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 Figure 2.1.1-1).
2.1.2 PaddLe Blank. A paddle blank is similar to the solid end of a figure-8 blank. Ii has a plain radial handle. It is generally used in conjunction with a paddle spacer In large sizes.
21.3 PaddLe Spacer. A paddle spacer is sin’iilar to the open end of a Ilgure-8 blank It hasa plain radial handle. Ii is generally used in conjunction with a paddle blank
2.2 References
Codes, standards, and specillcatlons, containing provisions to the extent referenced herein, constitute requirements of this Standard. These reference documents are listed in Mandatory Appendix I.
2.3 Quauty Systems
Nonmandatory requirements relating to the product manufacturer’s Quality System Program are described in Nonmandatory Appendix A.
2.4 Relevant Units
This Standard states values In both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. 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.
ft) For NPS 1 ‘I,, and larger blanks in aasses 600 and 900 raised face, the inside diameter is equal to Schedule lOS welding neck flange bore,
(d) For Class 1500 raised race blanks, the inside diameter Is equal to Schedule 40 weldIng neck flange bore.
(e) For Class 2500 raised face blanks, the inside diameter Is equal to Schedule 40 through NPS 6, Schedule 60 For NPS 8 and NPS 10, and Schedule 80 for NPS 12.
For all ting-loint blanks, the Inside diameter Is equal to the pipe outside diameter.
(g) Dimensions are based on concentric Installation of spiral wound gaskets with inner rings as required by ASME 816.20 and conform to the maximum permitted bore of ASME 8163 welding neck flanges described In ASME 816.20, Table SW-2.5-3.
5.4 Facing Finish
Facing finish shall be in accordance with ASME B 16.5. para. 6.4.5.
6 MATERIALS
6.1 GeneraL
(a) Materials for line blanks shall be in accordance with ASMF. B16.5, Table IA and shall include material restricboris cited in notcs to ASME B16.5. Tables 2 and 2C. The blank and spacer pomona of line blanks shall be nunu(actured as one piece in accordance with the applicable material specification. Assembly of multiple pieces into a blank or spacer portion by welding or other means Is not permitted by this Standard. Attachment of the handle or web (tie bar) to a blank or spacer portion by welding or other means is permitted.
(b) Recommended bolting materials for flange-blank assemblies are listed in ASME 816.5, Table lB.
jc For materials manufactured to editions of the material specification other than those listed in ASME 816.5, Mandatory Appendix II. refer to para 6.2.
(d) Criteria for the selection of materials are not within the scope of this Standard.
6.2 MateriaLs Manufactured to Other Editions
Materials may meet the requirements of material speciflc-auon editions other than those listed In ASME B16.S, Appendix II. provided.