Spectacle & Line Blinds
Explore our extensive product range below.
Specifications
We offer a wide range of spectacle blinds, spacers and blanks manufacture to API standards and B31.3 specifications. We are capable of handling size ranges from 1″ – 150 lbs class to 36″ – 2500 lbs class.702. We also manufacture bleed rings and lateral joints also.
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DESIGN SPECIFICATIONS
FEMALE RING TYPE JOINT (F-RTJ)
MALE RING TYPE JOINT (M-RTJ)
RAISED FACE (RF)
B16.47 SERIES A
B16.47 SERIES B
DESIGN SPECIFICATIONS
DESIGN SPECIFICATIONS
Paddle blanks, spacers and spectacle blinds may be purchased using carbon steel, 304 SS, 316 SS or any material which the customer may specify. Also several finishes are available as follows: smooth mill machined or serrated finish. All of our blanks are produced according to the thickness required in the ASME Code, B31.3-1987 edition. Regarding blanks section 304.5.3 specifies that the plate thickness shall be equal to
where d = inside diameter of gasket, P = design pressure, SE = allowable stress. Our blanks are designed to withstand any pressure-temperature combination listed in the ASA B16.5 flange design specifications. All ring joint dimensions and tolerances are in accordance with ASA B16.5 and B16.20. Octagonal rings are furnished unless oval rings are specified on male ring joint blanks. All blanks may be ordered with an eye-bolt welded to one end of the spectacle blind for support during installation.
Please contact our engineering department for custom design blanks. Our computerized stress analysis programs are always ready to meet our client needs.
Materials:
Normally A 285 Gr C plate is furnished for carbon steel up to and sometimes through 2″ thickness; A 515 Gr 70 plate, A 181 Class I or II forging, and A 105 Class I or II forging are normally furnished for high pressures or large line blinds.
Other carbon steel, low-alloy steel, stainless steel, or practically any alloy can be furnished.
Delivery:
Advise delivery required because sometimes plate can be used for a 2 to 4 week delivery. Forgings for say a 8 week delivery at a lower price than plate can be supplied, particularly on blinds 2″ and over in thickness.
Notes:
• Practically any alloy or special line blind can be furnished
• Carbon steel blinds have one shop coat of paint
• Tie bar and handle thickness is one half of blind thickness (minimum approximately)
• On all alloy blinds, handles and tie bars are carbon steel unless specifically requested.
• All blinds and spacers shown fit ASA B16.5 flanges. J dimension on male octagonal blind is 1/16″ more than half of the height of an octagonal ring joint gasket
• Sizes 1/2″ through 48″ and larger can be furnished
FEMALE RING TYPE JOINT (F-RTJ)
CLASS 150 – FEMALE RING TYPE JOINT (F-RTJ)
CLASS 300 – FEMALE RING TYPE JOINT (F-RTJ)
CLASS 600 – FEMALE RING TYPE JOINT (F-RTJ)
CLASS 900 – FEMALE RING TYPE JOINT (F-RTJ)
CLASS 1500 – FEMALE RING TYPE JOINT (F-RTJ)
CLASS 2500 – FEMALE RING TYPE JOINT (F-RTJ)
MALE RING TYPE JOINT (M-RTJ)
CLASS 150 – MALE RING TYPE JOINT (M-RTJ)
CLASS 300 – MALE RING TYPE JOINT (M-RTJ)
CLASS 600 – MALE RING TYPE JOINT (M-RTJ)
CLASS 900 – MALE RING TYPE JOINT (M-RTJ)
CLASS 1500 – MALE RING TYPE JOINT (M-RTJ)
CLASS 2500 – MALE RING TYPE JOINT (M-RTJ)
RAISED FACE (RF)
CLASS 150 – RAISED FACE (RF)
CLASS 300 – RAISED FACE (RF)
CLASS 600 – RAISED FACE (RF)
CLASS 900 – RAISED FACE (RF)
CLASS 1500 – RAISED FACE (RF)
CLASS 2500 – RAISED FACE (RF)
B16.47 SERIES A
CLASS 150 – B16.47 SERIES A
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
CLASS 300 – B16.47 SERIES A
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
CLASS 600 – B16.47 SERIES A
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
B16.47 SERIES B
CLASS 150 – B16.47 SERIES B
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
CLASS 300 – B16.47 SERIES B
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
CLASS 600 – B16.47 SERIES B
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
CLASS 900 – B16.47 SERIES B
Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: We do not recommend spectacle blinds in this size range, but recommends paddle spacer sets instead.
NOTE: We cannot guarantee that the web of these blinds can resist cantilevered forces in all orientations.
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