ANSI B16.5 Threaded (Screwed) Flanges

Reliable Threaded Flanges for Weld-Free Piping Connections

ANSI B16.5 Threaded (Screwed) Flanges are manufactured in strict accordance with ASME/ANSI B16.5 standards, providing a dependable solution for piping systems where welding is not practical or permitted. These flanges feature precision-machined internal threads that allow them to be screwed directly onto threaded pipes, eliminating the need for welding while ensuring a secure mechanical connection. They are widely used in applications requiring convenient installation, easy maintenance, and reliable sealing performance, particularly in low- to medium-pressure piping systems.

Premium Materials and Precision Manufacturing

Our ANSI B16.5 Threaded Flanges are manufactured from premium carbon steel, stainless steel, alloy steel, duplex stainless steel, and other high-performance materials to meet a wide variety of industrial operating conditions. Advanced forging technology, CNC precision machining, accurate thread processing, and controlled heat treatment ensure outstanding dimensional accuracy, excellent thread engagement, and superior mechanical strength. Every flange is carefully manufactured to comply fully with ASME/ANSI B16.5 dimensional and performance requirements.

Reliable Sealing and Long-Term Durability

Designed for dependable service, ANSI B16.5 Threaded (Screwed) Flanges provide excellent resistance to pressure, corrosion, vibration, and thermal cycling. Their threaded design minimizes installation time while avoiding heat-affected zones that may result from welding. When combined with suitable sealing compounds, PTFE tape, and compatible gaskets, these flanges provide stable, leak-resistant performance in demanding industrial environments. Their robust construction also contributes to reduced maintenance costs and extended service life.

Complete Size and Pressure Class Selection

Our threaded flanges are available in NPS 1/2" to 24" with pressure ratings including Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, and Class 2500. Standard sealing face options include Raised Face (RF) and Flat Face (FF), while customized dimensions, thread specifications, surface finishes, and protective coatings are available according to customer requirements. Both standard and special material grades can be supplied for corrosive or high-temperature applications.

Wide Range of Industrial Applications

ANSI B16.5 Threaded Flanges are extensively used in oil and gas pipelines, petrochemical plants, chemical processing facilities, water treatment systems, fire protection networks, compressed air systems, hydraulic installations, marine engineering, power generation, pharmaceutical production, food processing, instrumentation pipelines, and general industrial piping systems. They are particularly suitable for small-diameter pipelines and locations where welding may create safety concerns or where future disassembly is required.

Comprehensive Quality Assurance

Each ANSI B16.5 Threaded Flange undergoes a comprehensive inspection program throughout production. Raw material verification, chemical composition analysis, mechanical property testing, dimensional inspection, thread gauge inspection, hardness testing, non-destructive testing (NDT), surface examination, and final visual inspection are performed to ensure full compliance with international standards and customer specifications. Third-party inspections and additional testing can also be arranged to meet project-specific requirements.

OEM Manufacturing and Worldwide Supply

We provide OEM and customized manufacturing services for EPC contractors, engineering companies, distributors, and industrial customers worldwide. Customized materials, pressure ratings, thread types, corrosion-resistant coatings, laser marking, packaging, and inspection documentation are available upon request. With advanced manufacturing facilities, experienced technical personnel, and an efficient global logistics network, we deliver high-quality ANSI B16.5 Threaded (Screwed) Flanges that offer consistent performance, dependable quality, and timely delivery for industrial projects around the world.