ASME B16.48:2005 pdf free download

ASME B16.48:2005 pdf free download.Line Blanks.
3.3.2 Female Ring-Joint Blanks. Female ring-joint grooves shall be shaped with the groove side wall surface finish not exceeding 1.6 Lm (63 iiin.) Ra roughness. The finish of the gasket contact faces shall be judged by visual comparison with Ra standards (see ASME B46.1) and not by instruments having stylus tracers and electronic amplification.
3.3.3 Male Ring-Joint Blanks. The gasket shape (ring) for male ring-joint blanks shall not exceed 1.6 i.m (63 iin.) Ra roughness. The finish of the gasket contact faces shall be judged by visual comparison with Ra standards (see ASME B46.1) and not by instruments having stylus tracers and electronic amplification.
4 DIMENSIONS
4.1 General
Dimensions shall be in accordance with Tables I through 18 (Tables A-i through A-18 of Nonmandatory Appendix A).
4.2 Tolerances
4.2.1 FacIng Tolerances. Tolerances for facings shall be in accordance with ASMF 1116.5.
4.2.2 ThIckness Tolerances. Thickness tolerances are
NPS 18 and smaller —zero + 3.0 mm (0.12 in.)
NPS 20 and larger —zero + 4.8 mm (0.19 in.)
4.3 Openings
(a) For NPS 14 NPS and NPS I blanks in all raised face classes, the inside diameter is equal to standard weight welding neck flange bore.
(b) For NPS l’4 and larger blanks in Classes 150 and 300 raised face, the inside diameter is equal to the pipe outside diameter.
(c) For NI’S 1/4 and larger blanks in Classes 600 and 900 raised face, the inside diameter is equal to Schedule lOS welding neck flange bore.
(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 NI’S 8 and NI’S 10, and Schedule 80 for NI’S 12.
(f) For all ring-joint blanks, the inside diameter is equal to the pipe outside diameter.