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Pipe Isolation Blinds · Buy or Rent

Pipe Isolation Blinds Paddle Blinds, Spectacle Blinds & Blind Flanges

The Gulf Coast's largest inventory of slip blinds and blind flanges, 1/2" to 96" in classes 150# to 2500#. Stocked items ship same day, and as a custom shop we machine hydro and isolation blinds to any thickness, handle, alloy, face, or coating. Rent or buy, with support 24/7/365.

Get A Quick Quote Call (800) 456-8721

Shop: Isolation Blinds Specialty Blinds Storage Racks By Application

Paddle blind and spectacle blind animation

Hydro & Isolation Blinds

Paddle Blinds, Spectacle Blinds & Blind Flanges

Positive isolation for maintenance, turnarounds, and hydrostatic testing. Isolation, hydro, or custom thickness in every size and class.

Paddle Blinds

Line blanks and blind spades for temporary isolation and hydrotesting.

Sizes: 1/2" – 96"
Classes: 150# – 2500#
Rent: Yes

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Spectacle blind, also called a figure 8 blind

Spectacle Blinds

Figure 8 blinds that switch between open and closed, with the position visible at a glance.

Sizes: 1/2" – 96"
Classes: 150# – 2500#
Rent: Yes

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Paddle spacer blind, also called a ring spacer

Paddle Spacers

Ring spacers that hold flange spacing when the paddle blind comes out.

Sizes: 1/2" – 96"
Classes: 150# – 2500#
Rent: Yes

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Blind Flanges

Close off a pipe run or vessel nozzle. Huge stock, ships same day.

Sizes: 1/2" – 96"
Classes: 150# – 2500#
Rent: Yes

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Specialty Slip Blinds · Exclusive to USA Industries

Vented, Purge & PSV Blinds

Our proprietary EZ® designs vent, purge, or isolate during line blinding, for hydrogen, LNG, and any service that needs it.

EZ Vent®

Vented (ported) blinds that bleed off trapped gas or pressure at the blind.

Ports: NPT or SW
Sizes: 1/2" – 96"
Rent: Yes

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EZ Purge®

Machined channels purge nitrogen or inert gas across the blind face.

Channels: 3/4", 1", 1-1/2" wide
Sizes: 1/2" – 96"
Rent: Yes

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EZ Vent-Purge®

Vent on one side, purge on the other, in a single blind.

Sizes: 1/2" – 96"
Classes: 150# – 2500#
Rent: Yes

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EZ Guillotine™

Isolates the flare header side of a PSV in seconds, with the PSV bolts still in place.

Service: PSV flare header
Sizes: 1/2" – 96"
Rent: Purchase only

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Line Blind Storage Solutions

Paddle Blind, Blind Flange & PSV Racks

EZ Lock® and EZ Store™ racks keep blinds, blind flanges, and valves organized, protected, and ready to deploy, on site or in the field.

EZ Lock Blind Rack®

Lockable storage for paddle, spectacle, and spacer blinds.

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EZ Lock Blind Flange Rack™

Upright storage that keeps blind flanges secured and easy to pull.

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EZ Store Blind Flange Rack™

Stackable racks that save floor space in the yard or warehouse.

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PSV Storage Racks

Small, medium, large, and custom racks for pressure safety valves.

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Buying Guide

Which Blind Do You Need?

Paddle blinds, spectacle blinds, and blind flanges each serve a different isolation and testing role. Find your application below, or call us and we'll spec it for you.

ApplicationRecommendedWhy

Temporary isolation for maintenance or a turnaroundPaddle Blind ›Positive shutoff. Isolation thickness, rentable for outages.

Hydrostatic testing a piping systemPaddle Blind (Hydro) ›Hydro thickness rated for test pressure, 150# to 2500#.

Switching a line between open and closed oftenSpectacle Blind ›Blind and spacer in one piece. The position is visible at a glance.

Holding flange spacing after the blind comes outPaddle Spacer ›Ring spacer used as a pair with the paddle blind. "O" cut handle.

Closing off a pipe run or vessel nozzleBlind Flange ›ASME B16.5 and B16.47. Huge stock, ships same day.

Venting trapped gas or pressure at the blindEZ Vent® ›NPT or SW vent ports, one or multiple, on one or both sides.

Purging nitrogen or inert gas during isolation or commissioningEZ Purge® ›Machined purge channels across about half the gasket area.

Venting and purging at the same blind, such as hydrogen or LNG serviceEZ Vent-Purge® ›Vent ports on one side, purge channels on the other.

Pulling a PSV for repairEZ Guillotine™ ›Isolates the flare header side in seconds with the PSV bolts in place.

Storing and protecting blinds and blind flangesEZ Lock® & EZ Store™ Racks ›Organized, secured, and ready to deploy on site or in the field.

Why USA Industries

The Gulf Coast's Largest Inventory of Slip Blinds & Blind Flanges

40+Years in Business

ISO9001:2015 Certified

24/7Emergency Support

1/2"–96"Size Range

Stocked & Ready to ShipThe largest ready inventory of paddle, spectacle, and spacer blinds and blind flanges in the Gulf region. Same-day shipping on in-stock items.

Rapid Custom MachiningAny size, thickness, alloy, face, handle, or coating, built to your specs with fast turnaround for planned and unplanned outages.

American Mill MaterialBlind plate sourced from American mills, with MTRs on request. Stocked in SA516 Gr.70, 304 SS, and 316 SS. Any alloy to order.

4 Locations. Buy or Rent.Facilities in S. Houston TX, Corpus Christi TX, Prairieville LA, and Broken Arrow OK. Rental programs for paddle, spectacle, and spacer blinds and blind flanges: get what you need and return it when the job is done.

Get A Quick Quote See Rentals

Get a Quote or Order

Send us these details and we'll respond the same business day.

Blind type and quantity
Line size and pressure class
Thickness: isolation, hydro, or custom
Alloy, face type, and handle
Rent or buy, and date needed

Get A Quick Quote Call (800) 456-8721

Paddle blind, paddle spacer blind, and spectacle blind illustration — Paddle, Spacer & Spectacle Blinds

Technical Data Sheet

Pipe Isolation Blinds

DS-BLD-001 Rev. Current

Specification	Details
Sizes	1/2" – 96"
Rating Classes	150# • 300# • 600# • 900# • 1500# • 2500#
Thickness Options	Isolation • Hydro • Custom
Stocked Alloys	SA516 Gr.70 CS • 304 SS • 316 SS (Any Alloy to Order)
Large Diameter	Series A • Series B (In Stock)
Face Options	Flat • Raised • RTJ Male • RTJ Female
Handle Options	T • 7 • Straight
Coating	Carbon steel blinds coated with black primer (Others Available)
Documentation	MTRs available on request
Delivery	Same-day shipping on stocked items • Pickup or delivery

ASME StandardB16.48

ASME StandardB16.47 (26"+ Series A & B)

ASME StandardB16.5

Industries Served

Trusted Across Process Industries

RefineriesPaddle and spectacle blinds for turnaround and maintenance isolation across crude units, hydroprocessing, and FCC. Rentals keep overhead low between outages.

Petrochemical & ChemicalCorrosive and high-temperature service in the exact alloy your process needs, including 316 SS, Hastelloy, and Inconel.

Power & EnergySteam, cooling, and feedwater systems, with ASME compliance across all pressure classes.

Water & WastewaterNSF ANSI/CAN 61 certified stainless blinds for potable water, plus blind flanges and paddle blinds for treatment and pumping.

LNG & MidstreamCryogenic and high-pressure gas service. EZ Vent® and EZ Purge® handle complex vent and purge requirements.

PharmaceuticalsStainless blinds with full material traceability and MTRs.

Semiconductor & Data CentersBlind flanges in 304 and 316 SS for process and cooling piping, with material documentation.

EPC & ContractorsProject quantities, fast delivery, accurate certifications, and one source for every blind and flange type.

Common Questions

Paddle Blind & Blind Flange FAQ

What is a paddle blind used for?

A paddle blind, also called a line blind, blind spade, or line blank, positively isolates a section of piping during maintenance, turnarounds, or hydrostatic testing. The solid plate is inserted between flanges to block flow and isolate downstream piping from the process.

What's the difference between a paddle blind and a spectacle blind?

A paddle blind is a single plate inserted between flanges. A spectacle blind (figure 8 blind) joins a solid blind and an open ring in one piece, so operators can switch between open and closed without removing it, and the position is visible at a glance.

What is a paddle spacer?

A ring spacer that goes in when the paddle blind comes out, holding flange spacing so the line can return to service. Spacers are used as a pair with paddle blinds.

Can I rent blinds from USA Industries?

Yes. Paddle blinds, spectacle blinds, paddle spacers, EZ Vent®, EZ Purge®, EZ Vent-Purge®, and blind flanges are available to rent or buy. The EZ Guillotine™ is purchase only. See rentals.

What sizes and pressure classes are available?

1/2" to 96" in ASME classes 150#, 300#, 600#, 900#, 1500#, and 2500#. Custom thicknesses and non-standard ratings are available on request. Paddle blinds conform to ASME B16.48 (up to 24") and ASME B16.47 Series A & B (26" and larger). Blind flanges conform to ASME B16.5 and B16.47.

What alloys are available?

Stocked in SA516 Gr.70 carbon steel, 304 SS, and 316 SS. Any alloy can be ordered, including 316L, Hastelloy, Inconel, and Duplex, for corrosive, cryogenic, or high-temperature service. MTRs are available on request.

What are EZ Vent®, EZ Purge®, and EZ Vent-Purge® blinds?

USA Industries' proprietary specialty slip blinds. EZ Vent® vents trapped gas or pressure, EZ Purge® purges nitrogen or inert gas across the blind, and EZ Vent-Purge® does both in one blind. They're ideal for hydrogen, LNG, and any line blinding that needs venting or purging.

Industry Terminology