A Spade Type Blind Flange is a solid metal plate used to completely block off a pipeline. It is typically installed between two flanges to isolate a section of piping for maintenance, inspection, or safety purposes. Spades are commonly used together with spacers (forming a spectacle blind set).
Spade type Blind Flanges
$999,999,999.00Price
Key Features
- Positive Isolation: Provides a reliable physical barrier to stop flow in the pipeline.
- Simple Installation: Installed by inserting between two flanges and tightening bolts.
- Interchangeable Use: Often paired with a spacer for easy switching between open and closed positions.
- Clear Identification: Usually equipped with a handle for easy handling and visibility.
- Robust Construction: Suitable for high-pressure and high-temperature applications.
Standards
- ASME B16.48 (Line Blanks)
- API 590 (Recommended Practice)
- Custom designs available per project requirements
Material
- Carbon Steel (e.g., ASTM A516 Gr.60/70)
- Stainless Steel (e.g., ASTM A240 304 / 316)
- Alloy Steel (upon request)
Size Range
- NPS: 1/2” – 48” (DN15 – DN1200)
Pressure Rating
- Class 150 / 300 / 600 / 900 / 1500 / 2500
Types
- Spade (Paddle Blind): Solid plate used to block flow
- Spacer (Ring Spacer): Open ring used to allow flow
- Spectacle Blind: Combination of spade and spacer connected by a web
Facing Type
- Raised Face (RF)
- Ring Type Joint (RTJ)
Surface Treatment
- Anti-rust oil
- Black painting
- Galvanized or coated (optional)
Applications
- Oil & Gas pipelines
- Petrochemical plants
- Refineries
- Power generation facilities
- Offshore and onshore piping systems
Inspection & Testing
- Dimensional inspection
- Visual inspection
- Material certification (EN 10204 3.1)
- Optional NDT (UT, PT)
Marking
- Size (NPS/DN)
- Pressure class
- Material grade
- Standard (e.g., ASME B16.48)
- Heat number / Manufacturer’s mark
