🔹 Product Overview
Carbon Steel Threaded Flanges are flanges with internal threads that allow connection to pipes without welding.
They are designed for small-diameter, low to medium pressure piping systems where welding is not feasible or where frequent dismantling is required.
Manufactured from high-quality carbon steel such as ASTM A105 and ASTM A350 LF2, these flanges provide reliable mechanical strength and leak-resistant performance for industrial piping applications.
They are produced in accordance with major international standards including ASME B16.5, EN 1092-1, DIN, JIS, and GOST 12820 / GOST 33259, making them suitable for global pipeline and engineering projects.
🔹 Key Features
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Material: Carbon Steel ASTM A105 / ASTM A350 LF2
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Connection Type: Threaded (NPT / BSP)
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Standards: ASME B16.5, EN 1092-1, DIN, JIS, GOST
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Pressure Rating: Class 150 – Class 600 (PN10 – PN40)
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Facing Type: RF (Raised Face), optional FF
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No welding required, easy installation and maintenance
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Suitable for pipelines where heat treatment after welding is not allowed
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Good sealing performance when used with proper thread sealant
🔹 Size & Technical Range
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Size range: 1/2” – 4” (DN15 – DN100)
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Pressure class: Class 150 / 300 / 600
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Thread type: NPT / BSP / BSPT
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Facing: RF / FF
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Manufacturing: Forged and CNC machined
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Custom dimensions available upon request
🔹 Materials & Grades
Available carbon steel grades include:
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ASTM A105
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ASTM A350 LF2 (low temperature service)
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ASTM A694 F42 / F52 (pipeline projects)
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EN P245GH / P250GH
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GOST 20, 09G2S
🔹 Applications
Carbon Steel Threaded Flanges are widely used in:
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Oil & Gas pipelines
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Petrochemical and chemical plants
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Power generation systems
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Boiler and steam pipelines
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Industrial process piping
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Water treatment systems
They are mainly applied in small bore piping systems where welding is impractical or not permitted.
🔹 Quality Control & Certification
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Chemical and mechanical testing of raw materials
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Dimensional inspection
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Visual inspection
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PMI testing (optional)
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NDT testing upon request
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EN 10204 3.1 / 3.2 certificates provided
🔹 Packaging & Delivery
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Seaworthy wooden cases or pallets
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Plastic caps to protect threads and sealing faces
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Anti-rust oil coating
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Clear marking: size, pressure class, material, heat number
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Stable delivery time for standard sizes
🔹 Why Choose Our Carbon Steel Threaded Flanges
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Professional manufacturer and exporter for global B2B customers
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Full compliance with ASME / EN / DIN / GOST standards
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Stable quality with competitive price
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Custom fabrication based on drawings
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Fast quotation and technical support
🔹 Request a Quote
To receive an accurate quotation, please provide:
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Size (DN or inch)
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Pressure rating (Class or PN)
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Thread type (NPT / BSP)
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Material grade (A105 / LF2, etc.)
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Standard (ASME / EN / DIN / GOST)
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Quantity
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Application or project details
Our technical sales team will respond quickly with a professional quotation.