scope:

General

This Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for operating line blanks in sizes NPS ½ through NPS 24 for installation between ASME B16.5 flanges in the 150, 300, 600, 900, 1500, and 2500 pressure classes. The dimensions are suitable for blanks made of materials listed in Table 1.

Definitions

Figure 8 Blank. A figure 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).

Paddle Blank. A paddle blank is similar to the solid end of a figure 8 blank (with handle) and is generally used in conjunction with a paddle spacer in large sizes (see Fig. 1).

Paddle Spacer. A paddle spacer is similar to the open end of a figure 8 blank (with a handle) and is generally used in conjunction with a paddle blank (see Fig. 1).

References

Referenced Standards. Standards and specifications adopted by reference in this Standard are shown in Annex A, which is part of this Standard. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Annex A.

Codes and Standards. Steel line blanks used under the jurisdiction of the ASME Boiler and Pressure Vessel Code, the ASME Code for Pressure Piping, or a governmental regulation are subject to the limitations of that code or regulation. This includes any maximum temperature limitation, or rule governing the use of a material at low temperature, or provisions for operation at a pressure exceeding the pressure-temperature ratings in this Standard.

Quality Systems

Nonmandatory requirements relating to the product manufacturer's Quality System Program are described in Annex B.