ASME B16. 48:2020 pdf free download

ASME B16. 48:2020 pdf free download.Line Blanks.
(d) For Class 1500 raised face 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.
(f) For all ring-joint 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 B 16.20 and conform to the maximum permitted bore of ASME 816.5 welding neck flanges described in ASME B16.20. Table SW-2.5-3.
5.4 Facing Finish
Facing finish shall be in accordance with ASME 816.5, para. 6.4.5.
6 MATERIALS
6.1 General
(a) Materials for line blanks shall he in accordance with ASME B16.5, Table 1A and shall include material restrictions cited in notes to ASME B 16.5. Tables 2 and 2C. The blank and spacer portions of line blanks shall be nianu• factured 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.
jbJ Recommended bolting materials for flange-blank assemblies are listed in ASME B16.5, Table lB.
(c) 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 specification editions other than those listed in ASME 816.5, Appendix II, provided
(a) the materials are the same specification, grade, type, class, alloy, and heat-treated condition, as applicable
(b) the line blank manufacturer certifies that the requirements of the edition of the specification listed in ASME B16.5, Mandatory Appendix II have been met
7 MARKING
7.1 GeneraL
(a) Line blanks shall be marked as follows:
(2) manufacturer’s name or trademark
(2) material, specification, and grade or class
(3) pressure class
(4) 816
(5) size (NPS)
(6) ring number (if applicable)
(b) Where space does not permit all of the above markings, they may be omitted in the reverse order given in (a).
(cJ The B16 designation may be applied only when the line blank has been manufactured in full conformance with this Standard.
7.2 Marking Method
The marking shall be applied by steel stamping or other marking device that leaves a legible imprint. When marking on the blind portion of the blanks, low stress marking shall be used and shall not impinge on the gasket seating surface.
8 PADDLE BLANK AND SPACER IDENTIFICATION
8.1 PaddLe HandLes
In order to differentiate between an installed paddle spacer and a paddle blank, it is required that there be an externally visible distinction between the two as required by paras. 8.2 and 8.3.