To isolate a particular section of pipe or equipment
A spectacle blind consists of a spade and a spacer which are manufactured for the purpose of installation in one piece.
It is used as a safety device to isolate a particular section of pipe or equipment when this section or this equipment is to be inspected or decommissioned.
It is different from a valve in the sense that the obturator is considered an isolation device.
Depending on the size and class of flanges, it will be more suitable to offer two separate components (spade and spacer) instead of a spectacle blind to limit weight and avoid handling heavy parts.
- A cost-effective solution for safely insulating a section of piping
- Quick and easy installation
- 100% leak-proof between the upstream and downstream sides
- Note: A spectacle blind is considered a true isolation device, unlike a valve
- Other names: spade or spacer or line blank
GENERAL DATA
- Standard: ASME B16.48.
- Mounting between flanges: ISO PN 2,5 to PN 420, ASME 150 # to 2500 #, others on consultation.
- Material: Standard: 304L / 316L stainless steel, others according to your application.
- Fluid: liquid, gas, steam.
- Diameter: according to the nominal diameter of the flange.
- Operating pressure: limited to the nominal pressure of the flange.
- All types of faces: RF, RTJ, male or female fitting.
Here are a few examples of blinds we have manufactured for various applications:
RF spectacle blinds made in cupro-nickel
These spectacle blinds (in accordance with ASME B16.48) are made of cupronickel because this material has antifouling properties. The antifouling treatment is designed to prevent aquatic organisms from attaching to the surface.
Fouling is a natural phenomenon, and it is important to protect submerged objects such as ship hulls, as well as certain facilities on oil platforms, in ports, and at nuclear power plants (such as heat exchangers cooled by seawater)...
For this application, cupronickel was chosen for its ability to resist the growth of aquatic organisms on its surface, which is not the case with standard stainless steel and duplex grades.
Left: RTJ-F spectacle blinds made in SS316L / In the center: painted spectacle blinds / Right: PTFE-coated spectacle blinds
If you do not find the answer you are looking for, please contact us either by phone at +33 (0)5 59 30 85 20 or via the contact form. We will respond as soon as possible.
A single hollow shutter is also called spacer or ring. A single full shutter is also called spade. Finally a reversible shutter also takes the name of spectacle blind.
