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ASME B16.48 Ring Joint Female
Spectacle Blanks - Paddle Blanks - Paddle Spacers

Spectacle Blank
  A combination of a Paddle Blank and a Paddle Spacer fabricated, for field convenience, as a single unit. Weight limitations and the associated difficulty of handling heavy pieces in the field are the primary considerations in specifying a Spectacle or Figure 8 Blank over separate components.

Paddle Blank
(Photo Not Shown)
  A positive shut-off device normally installed adjacent to, or in conjunction with, a valve. Their purpose is to prevent accidental flow through a pipeline or into a vessel.

Paddle Spacer
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  ASME B16.48 Designed Paddle Spacers are bored to the outside diameter diameter of pipe and are of the same thickness as the Paddle Blank it replaces.


Standard Finish: Gasket = 63 AARH finish. Facing = 125 AARH lathe finish

Denotes Required Specifying Information
  Product Name / Description (i.e. Spectacle Blank, Paddle Blank, Paddle Spacer)
  Nominal Pipeline size (e.g. 10")
  Adjacent flange class and type (e.g. 150# RF, MSS SP-44 (if using ANSI B16.47, specify series A or B)


RJ - For use with Ring Joint flanges.

  Material of construction (e.g. carbon steel, stainless steel - or it may be specific e.g. SA516 Gr. 70, SA240 Type 304 S.S.)
Denotes Optional Information    
  Alternate Gasket Surface/Finish (click here to see available gasket surface finishes)
  Special Dimensions
  Corrosion Allowance
  Special marking or tagging requirements
  Special QA, traceability or paperwork requirements (e.g. CMTR's)
  Oxygen cleaning (click here to see Mack Iron cleaning capabilities)

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