Domestic Threaded Flanges

Industrial Threaded Flanges for Piping Connections

Threaded flanges are a practical choice for industrial piping lines where welding is not preferred or not allowed. Their internal threads connect directly to threaded pipes, making them useful for small-bore pipe runs, repairs and utility lines. Plants working with air, water, steam, low-pressure hydrocarbons, or general service fluids often rely on threaded flanges for clean installation and easy maintenance work.

These flanges are often used in areas where hot work permits can slow down jobs or where welding equipment cannot be brought in. Maintenance teams, shutdown crews and fabrication shops use threaded pipe flanges to build or modify lines without cutting or welding, which simplifies on-site work.

Common Industrial Applications

Threaded flanges are widely seen in:

• Utility lines and low-pressure service
• Small-diameter process connections
• Instrument hook-ups
• Test points and equipment tie-ins
• Repair jobs in confined spaces

Their threaded design helps reduce field preparation time and supports quick assembly during maintenance or equipment changeouts.

Material Options and Build Quality

Threaded flanges are available in carbon steel and stainless options depending on the operating environment. Carbon steel is commonly used across general industrial pipelines, while stainless is selected for lines exposed to moisture, certain chemicals, or higher corrosion exposure. Each flange is produced following standard industrial manufacturing practices that support consistent dimensions, thread quality and performance.

Sizes, Rating and Purchasing Details

This collection features threaded flanges in standard classes and pipe sizes. Pricing can vary based on material, size and rating, so each product listing displays the threaded flange price clearly for procurement teams preparing quotes or planning upcoming work. Customers can check the product details for pressure class, dimensions and pipe compatibility to match their pipeline needs.

Industrial Sourcing Made Easy

This category is built for plant operators, contractors, project buyers and OEM builders looking for high-quality threaded flange options for both new installations and replacement work. Each product page includes clear specifications so customers can select the correct product for their application.

Available Industrial Sizes

At Trupply, our threaded flange category includes commonly used industrial sizes such as 3 threaded flanges and 4 threaded flange options used throughout refineries, chemical plants, mechanical rooms, fabrication shops and OEM equipment builds. These flanges follow widely used ASME dimensional standards to support proper fit-up with common industrial pipe schedules and fittings.

For flexible piping designs, threaded flanges can be combined with slip-on flanges, weld neck flanges, or socket weld flanges to meet system requirements while maintaining reliability and ease of installation.

Sizes

Size & Dimension table for Flanges

Materials

A105 - The standard forged carbon steel piping components for ambient and high temperature / pressure systems

SS304 - A common standard for stainless steel due to its malleability, high corrosive resistance weld-ability  

SS316 - A molybdenum stainless steel that provides excellent tensile, creep and stress-rupture strengths at elevated temperatures

Material Description for Flanges

Video