FRP FLANGES, BLIND FLANGES & MANWAYS
Quality Construction. Reliable Performance. American Manufacturing.
Strand Composites manufactures and supplies high-quality Fiberglass Reinforced Plastic (FRP) flanges, blind flanges, manways, and covers for demanding industrial applications.
Designed and manufactured with the same commitment to quality, engineering, and craftsmanship that goes into our FRP vessels and piping systems, Strand products provide dependable solutions for corrosive industrial environments.
We proudly support American manufacturing through our commitment to domestically sourced materials, products, and services.
Standard Products. Custom Solutions. Manufacturing You Can Trust.

STOCKED FRP FLANGES & MANWAYS
Strand Composites offers a selection of standard FRP flanges, blind flanges, manways, and covers to support industrial maintenance, replacement, and new construction requirements.
FRP Flanges & Blind Flanges
Our stocked flange and blind flange offerings include:

• Sizes from 1 inch through 16 inches

• 50 PSI and 150 PSI pressure options

• Ineos Derakane 411 and 470 resin options

• ANSI B16.5 Class 150 bolt-hole and bolt-circle drilling

FRP Manways & Covers
Strand also offers FRP manways and covers for industrial vessel and tank applications.
Available configurations include:

• 24-inch and 36-inch sizes

• 2 PSI, 10 PSI, and 20 PSI pressure options

• Derakane 411 and 470 resin options

Contact our sales team for current inventory, product availability, and pricing.

QUALITY CONSTRUCTION & MANUFACTURING
Every Strand FRP flange and fitting is manufactured in our ASME-accredited, climate-controlled production facility, following the same quality assurance and quality control practices applied to the FRP components incorporated into our manufactured equipment.
Our manufacturing approach emphasizes consistent laminate construction, corrosion resistance, and dependable product quality.
Monolithic Hand-Layup Construction
Strand flanges are manufactured using monolithic hand-layup construction. Flange, hub, and neck dimensions meet or exceed the published ASTM PS 15-69 dimensional requirements.
Custom flanges can also be manufactured to applicable ASME RTP-1 or ASME Section X requirements, subject to the applicable design and construction scope.
Standard Corrosion Liner
Our standard flange construction incorporates a nominal 110-mil corrosion liner consisting of two Nexus surfacing layers and two chopped-strand mat layers.
This construction provides a corrosion-resistant barrier appropriate to the specified resin system and intended service conditions.
Resin Selection
Strand offers flange products utilizing Alta and AOC resin systems.
Resin selection is an important consideration in FRP equipment design. Our team can assist with evaluating resin requirements based on the intended chemical service and operating conditions.
Reinforced Construction
All Strand flanges 4 inches and larger incorporate Type II construction consisting of chopped-strand mat and alternating layers of 1½-ounce mat and 24-ounce woven roving, as applicable to the published construction.
Resin-Coated Bolt Holes
All flange bolt holes and spot-faced areas are resin coated to provide additional protection to exposed laminate surfaces.
Dimensional Configuration
Strand flanges are supplied with unmachined nozzle necks and backs unless otherwise specified. Custom requirements should be identified during the quotation and engineering review process.

CUSTOM FRP FLANGES & MANWAYS
Can't find the exact configuration you need? Strand can build it.
In addition to our standard stocked products, Strand Composites manufactures custom FRP flanges and manways to customer specifications and project requirements.
Whether you need a nonstandard diameter, custom configuration, specific resin system, or an engineered component, our team can work with you to evaluate the requirements and develop an appropriate manufacturing solution.
We welcome inquiries for:

• Custom flange dimensions and configurations

• Special drilling and connection requirements

• Custom manways and access covers

• Project-specific resin requirements

• Engineered FRP components

• Volume and production orders

Provide your drawings, specifications, operating conditions, and project requirements so our team can evaluate your application.
Contact Strand to discuss your custom FRP component requirements.

DOMESTIC MANUFACTURING. INDUSTRIAL EXPERIENCE.
Strand Composites believes in supporting American manufacturing through the use of domestically sourced goods and services.
Our FRP flanges and manways are manufactured in our own climate-controlled production facility, allowing us to maintain direct oversight of manufacturing processes and quality practices.
From standard replacement components to custom-engineered requirements, Strand is committed to providing dependable products and responsive customer support.

REQUEST PRICING OR TECHNICAL INFORMATION
Whether you need a standard FRP flange, replacement blind, manway, or custom-manufactured component, Strand Composites is ready to help.
Contact our team for:

• Current product availability

• Stock product pricing

• Volume discounts

• Custom manufacturing quotations

• Technical information and product specifications

Let Strand Composites help you find the right FRP solution for your application.