Joining, flanges and sealing
Line blinds and isolation plates
Blind type, size, class, facing, thickness and material must match the flange and line design conditions.
Type and construction
Available types
Quick comparison
How the main types differ in selection
TypePurposeBest suited toWatchpoint
Spectacle blindClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Paddle blindClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Paddle spacerClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Reversible blindClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Ring spacerClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Ring-joint blindClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Before selection
Information to define
- 1Size
- 2Class
- 3Facing
- 4Thickness
- 5Material
- 6Handle and marking
Typical materials
Carbon steelStainless steelAlloy steel
Typical connections
Raised faceRing-type joint
Typical media
All piping services
Function
What does this family do?
Technical reference
Related standards
The exact edition and requirements must be checked against the project specification.
ASME B16.48
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Related families
Engineering note
This page supports initial screening and does not replace engineering calculations, project specifications, manufacturer approval or design pressure-temperature checks.
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