ASME B16.48-2020 pdf free

ASME B16.48-2020 pdf free.LINE BL .ANKS.
3.1 Pressure Classes Line blanks covered by this Standard are for the following pressure classes: 150, 300, 600, 900, 1500,
and 2500 as listed in ASME B16.5.
3.2 Pressure- Temperature Ratings
3.2.1 Ratings. Ratings are the maximum allowable working gage pressure at the temperature shown in ASME B16.5, Tables 2 and 2C for the appropriate material.and pressure class. For intermediate temperatures, linear interpolation between temperatures within a pressure class is permitted by ASMF 816.5.
3.2.2 System Pressure Testing. Line blanks may be subjected to system tests at a pressure not to exceed 1.5 times the 38°C (100°F) rating rounded off to the next higher 1 bar (25 psi) increment. Testing at any higher pressure is the responsibility of the user, taking into account the requirements of the applicable code or regulation.
3.2.3 Mixed MateriaL Joints. Should either the two flanges or the line blank in a flanged line blank assembly not have the same pressure-temperature rating, the rating of the assembled joint at any temperature shall be the lower of the flange or line blank rating at that temperature.
4.1 HandLe The handle or web (tie bar) may be integral or attached to the line blank or spacer. The web and its attachment shall be capable of supporting the weight of the blank or spacer in all orientations without permanent deformation to the web.
4.2 Edge Preparation
In addition to machining, flame, plasma, saw cutting, and press punching are acceptable methods for forming the inside and outside diameters of line blanks. Surfaces shall be free of projections that would interfere with gasket seating.
4.3 Facing
4.3.1 Raised Face Joint BLanks. The gasket-seating surface and dimensions for line blanks used with raised face flanges shall be in accordance with ASME 1316.5. A raised face may be specified for these blanks at the option of the purchaser. The height of the raised faces shall be in addition to the thicknesses, t, listed in Tables 4.3.1-1 through 4.3.1-6.
4.3.2 FemaLe Ring-Joint Blanks. Female ring-joint grooves shall be shaped with the groove side wall surface finish not exceeding 1.6 pm (63 pin.) 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.
4.3.3 MaLe Ring-Joint BLanks. The gasket shape (ring) for male ring-joint blanks shall not exceed 1.6 pm (63 pin.) 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.ASME B16.48 pdf download.