Spectacle Blind Flanges
Spectacle blind flanges combine a solid blind plate and a spacer in one connected assembly. Rotating the assembly changes the line between open and closed positions, supporting visible isolation during maintenance.
What to confirm
Provide line size, pressure class, material, facing, thickness, bolt-hole details, handle orientation and standard. The available clearance and operating procedure should be considered before final dimensions are approved.
Where they help
They are often considered for process lines, plant maintenance points and systems where positive visual isolation is important. Project-specific drawings and inspection documents can be reviewed before quotation.
Definition
This industrial pipe fitting page explains the product, its connection purpose and the project conditions that determine the correct design. Final dimensions and materials must follow the approved drawing, piping code and purchase specification.
Specification facts
| Specification field | What to confirm |
|---|---|
| Size and wall | Nominal size, outside diameter, wall thickness or schedule |
| Material | Carbon steel, stainless steel, alloy steel and required grade |
| Standard | ASME, ANSI, ASTM, DIN, JIS, GB or project-specific standard |
| Connection | End preparation, facing, radius, bore, branch geometry or orientation |
| Quality documents | Material certificates, dimensional records, inspection and marking requirements |
Specification and quotation checklist
For a project quotation, please provide nominal size, wall thickness or pressure class, material grade, applicable standard, quantity, end preparation, surface treatment and destination. Drawings, bill of materials and inspection requirements help our team confirm the correct manufacturing route before pricing.
How to order
- Send the size, material, standard and quantity.
- Share the drawing, bill of materials and operating conditions.
- Confirm dimensions, inspection documents and packing.
- Review the quotation and approve the production details.
- Coordinate export documents and delivery instructions.
Quality and export support
Each inquiry can be reviewed against dimensional requirements, material documentation, surface condition, marking, packing and shipping instructions. Buyers may also specify inspection points and required documents before production. Contact our team for a product-specific review.
Frequently asked questions
What information is needed for a quotation?
Provide size, wall thickness or schedule, material grade, standard, quantity, end preparation and any drawing or inspection requirement.
Can the fitting be customized?
Project-based dimensions, materials, markings, inspection documents and export packing can be reviewed against the approved specification.
How do I choose the correct product?
Match the fitting to the pipe size, pressure and temperature, material compatibility, connection method, applicable code and available installation space.
Related pipe fitting resources
Pipe flanges · Pipe elbows · Pipe reducers · Flange types · Request a quotation