Blind Flanges
for Piping Systems
We're not just any flange manufacturer from Texas — as a custom manufacturer, we supply precision-engineered solutions for any piping system worldwide and will produce your steel blind flange in any thickness, alloy, or coating you require.
Money.
Rent
Pipe Blind Flanges.
- Flange Rating (150#, 300#, 600#, 900#, 1500#, 2500#)
- Size (1/2" – 96")
- Vent, Port and Sizes (if required)
- Steel Material Type (Carbon, Stainless – 304, 316, Other)
- Quantity Needed
- Necessary Delivery Date
| Specification | Details |
|---|---|
| Sizes | 1/2" – 96" |
| ASME Pressure Ratings | 150# • 300# • 600# • 900# • 1500# • 2500# |
| Stocked Alloys | 516-Gr70 CS • 304/316 SS (Any Available Alloy) |
| Port Options | NPT or SWMultiple Ports Can Be Added |
| Face Options | Raised • Flat • RTJ Male • RTJ Female |
| Coating Options | Galvanized • Zinc Plated • Yellow Zinc Chromate |
- Custom HIGH PRESSURE FLANGES made to your exact specs
- FAST DELIVERY: Same-day local shipping available in Texas and Louisiana
- Your go-to Texas Flange manufacturer for critical applications and custom needs
Blind Flange Face & Gasket Types
USA Industries supplies blind flanges in all standard face configurations — Flat Face, Raised Face, and Ring Type Joint (RTJ) — as well as all RTJ gasket profiles including Oval, Octagonal, RX, and BX types for high-pressure service.
Choosing the Right Blind Flange
Blind flange selection involves matching the pressure rating, face type, material, and size to your specific piping system. Use the comparison table and quick finder below to identify the right configuration before you order — or call our team to confirm.
Face Type Comparison
| Face Type | Pressure Rating | Gasket Required | Most Common Use | Available From USA Industries |
|---|---|---|---|---|
| Flat Face (FF) | 150# – 300# | Full-face gasket | Cast iron flanges, low-pressure utility systems | ✓ |
| Raised Face (RF) | 150# – 2500# | Ring or spiral wound gasket | General industrial — most common configuration | ✓ |
| RTJ Female | 300# – 2500# | Solid metal ring gasket | High-pressure, high-temperature critical service | ✓ |
| RTJ Male | 300# – 2500# | Mates to RTJ Female groove | Metal-to-metal seal, extreme service conditions | ✓ |
Pressure Rating Quick Reference
| ASME Class | Common Applications | Typical Industries | Standard Face | In Stock |
|---|---|---|---|---|
| 150# | Low-pressure utility, water, steam | Water treatment, HVAC, general utility | Flat or Raised Face | ✓ |
| 300# | Moderate pressure process service | Chemical, petrochemical, general process | Raised Face | ✓ |
| 600# | Higher pressure process lines | Refining, oil & gas, power generation | Raised Face or RTJ | ✓ |
| 900# | High-pressure service lines | Refineries, offshore platforms | RTJ or Raised Face | ✓ |
| 1500# | Very high-pressure critical service | Upstream oil & gas, high-pressure process | RTJ | ✓ |
| 2500# | Extreme pressure — specialty applications | Wellhead, subsea, high-pressure chemical | RTJ | ✓ |
What Is a Blind Flange?
A blind flange is a solid flange with no bore — it bolts directly to a mating flange to seal off the end of a pipe, nozzle, or pressure vessel opening. Unlike a weld cap, a blind flange is bolted in place and can be removed, making it ideal for systems that require periodic access, testing, or future expansion.
Blind flanges are manufactured to ASME B16.5 (up to 24") and ASME B16.47 Series A and B (26" and larger), and are available in all standard pressure classes from 150# to 2500#.
What Are Blind Flanges Used For?
Blind flanges serve three primary functions in industrial piping systems:
- Maintenance Isolation — Seal a pipeline section for repairs or modifications without shutting down the entire system, reducing downtime and improving operational efficiency
- Pressure Testing — Provide a temporary closure for hydrostatic or pneumatic testing to verify structural integrity and detect leaks before commissioning
- Permanent Decommissioning — Permanently seal pipeline sections being abandoned or taken out of service
- Future Access Points — Install now for future system tie-ins, nozzle connections, or instrumentation access
Common industries include oil and gas refineries, petrochemical plants, power generation facilities, offshore platforms, chemical processing, and water treatment.
Blind Flange Material Options
The flange material should match or be compatible with the pipe material and process fluid to prevent corrosion and ensure long-term seal integrity.
- SA516 Grade 70 Carbon Steel — Standard stocked material for most general industrial applications
- A105 Carbon Steel — Forged carbon steel for higher-pressure service
- 304 & 316 Stainless Steel — Corrosion-resistant, widely stocked in multiple sizes and ratings
- Duplex & Super Duplex Stainless — High strength and corrosion resistance for demanding environments
- Monel, Inconel, Incoloy, Hastelloy — Extreme temperature and chemical resistance
- Titanium — Chemical processing and highly corrosive services
- Custom alloys available — A182, A350, B160, and more on request
How to Select the Right Blind Flange
Selecting the correct blind flange requires matching five key parameters to your piping system:
- Pipe size (NPS) and ASME pressure class (150# through 2500#)
- Face type — Flat Face, Raised Face, or Ring Type Joint (RTJ)
- Material — must be compatible with process fluid and temperature
- ASME standard — B16.5 for 1/2" to 24", B16.47 Series A or B for 26" and larger
- Port or vent requirements — NPT or SW, location, and number of ports
Use our Blind Flange Specifications Tool to look up exact dimensions by size and class, or call our technical team at (800) 456-8721 to confirm the right flange for your application.
Why Choose USA Industries Blind Flanges?
USA Industries has been manufacturing and supplying blind flanges for over 40 years from our facilities in Texas, Louisiana, and Oklahoma. We are not a distributor — we are the manufacturer, which means faster lead times, custom capabilities, and direct technical support.
- Large inventory of stocked blind flanges in CS and SS — ready to ship same day
- Custom sizes, thicknesses, and alloys — any specification, fast turnaround
- Sizes from 1/2" to 96" — ASME B16.5 and B16.47 Series A & B
- Rent or purchase — lower upfront cost with rental available from all service centers
- ISO 9001:2015 certified manufacturing
- U.S.-produced steel — available with MTRs, PMI verification, and full QC documentation
- 24/7/365 emergency availability — service centers in Houston TX, Corpus Christi TX, Prairieville LA, and Broken Arrow OK
Additional Information
Technical Documentation
