ASME B16.48 | Line Blanks | Class 150–2500
Elite supplies Spade Blinds, Paddle Blanks, Spacers and Figure-8 Blinds for positive mechanical isolation in piping systems. These line blanks are installed between mating flanges to provide a clearly defined open or isolated condition during operation, maintenance, inspection, pressure testing and plant turnaround activities.
Spade and Paddle Blanks are available in standard and project-specific configurations, with materials and inspection requirements selected according to service conditions and applicable specifications.
| Specification | Details |
|---|---|
| Product | Spade Blind / Paddle Blank / Line Blank |
| Primary Standard | ASME B16.48 |
| Size Range | NPS 1/2–24; larger sizes available by project requirement |
| Pressure | Class Class 150, 300, 600, 900, 1500, 2500 |
| Configuration | Spade, Paddle, Spacer, Figure-8 / Spectacle Blind |
| Installation | Between mating pipe flanges |
| Construction | Plate, forged or machined construction, as applicable |
| Thickness | Standard or project specified |
| Paddle | Integral handling and identification paddle |
| Flange Compatibility | Based on applicable mating flange dimensions |
| Marking | Size, class, material, heat number and required identification |
| Heat Treatment | As required by material specification |
| Surface Finish | Standard or customer specified |
| Inspection | Dimensional, visual and material verification as applicable |
| NDE | PMI, UT, MT, PT and other methods when specified |
| Documentation | MTC, COC, inspection reports and project documentation |
| Configuration | Description |
|---|---|
| Spade / Paddle Blank | Solid blank used to completely block the flow path and provide positive isolation |
| Spacer | Maintains an open flow path between mating flanges |
| Figure-8 / Spectacle Blind | Combines a blind and spacer in one reversible assembly |
| Spade / Paddle Blank | A solid line blank used when complete mechanical isolation of a piping section is required. The integral paddle provides a convenient handling point and visible identification. |
| Spacer | Used when the line is in the open position. The spacer maintains the required flange configuration while allowing the process to flow. |
| Figure-8 / Spectacle Blind | A combined blind and spacer assembly that can be rotated between the open and isolated positions. |
| Inspection / Documentation | Availability |
|---|---|
| Material Test Certificate | Standard / As specified |
| EN 10204 3.1 | Available |
| EN 10204 3.2 | Where specified |
| Certificate of Conformance | Available |
| Dimensional Inspection | Available |
| Chemical Analysis | Material dependent |
| Mechanical Testing | Material dependent |
| Heat Treatment Records | Where applicable |
| PMI | As specified |
| UT | As specified |
| MT | As specified |
| PT | As specified |
| Visual Inspection | Standard |
| Third-Party Inspection | Available |
| ITP | Project specific |
| Material Traceability | Maintained |
| Packing & Marking Records | Available |
Carbon Steel
ASTM A105/A105N, ASTM A181, ASTM A350 LF2/LF3 and ASTM A694 F42, F46, F52, F60 and F65.
Stainless Steel
ASTM A182 F304/F304L, F316/F316L, F321/F321H, F347/F347H, F310/F310S, F317 and F904L.
Duplex & Super Duplex
ASTM A182 F51, F53 and F55.
Alloy Steel
ASTM A182 F1, F5, F9, F11, F12, F22, F91 and F92.
Nickel Alloys
Nickel 200/201, Monel 400/K500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.
Copper-Nickel Alloys
UNS C70600 and C71500, including 90/10 and 70/30 Cu-Ni alloys.
Material selection is based on operating pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Where required by the application, project or customer specification:
Note: ASME B16.48 is the primary dimensional standard for line blanks. Other flange standards may apply to the associated piping system or project-specific configuration.
Spade Blinds and Paddle Blanks are commonly used in:
For quotation, please provide:
Size + Pressure Class + Type + Material + Thickness + Flange Configuration + Quantity + Inspection Requirements
Example
6″ Class 600 Spade / Paddle Blank, ASME B16.48, ASTM A105N, RF flange application, EN 10204 3.1.
