🔹 Product Overview
Carbon Steel Socket Weld Flanges (SW Flanges) are forged flanges designed for small-diameter, high-pressure piping systems.
The pipe is inserted into the socket of the flange and fillet welded on the outside, providing a strong and leak-resistant connection.
Manufactured from high-quality carbon steel such as ASTM A105 and ASTM A350 LF2, these flanges are widely used in industrial piping where reliability, strength, and easy installation are required.
They comply with major international standards including ASME B16.5, EN 1092-1, DIN, JIS, and GOST 12822 / 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: Socket Weld (SW)
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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 RTJ
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Forged construction ensures high mechanical strength
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Suitable for small bore, high-pressure piping systems
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Excellent sealing performance and vibration resistance
🔹 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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Facing: RF
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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)
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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 Socket Weld Flanges are commonly 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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Pressure vessels
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Industrial process piping
They are especially suitable for high-pressure small diameter pipelines where compact and strong connections are required.
🔹 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 (UT / MT / PT) available
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EN 10204 3.1 / 3.2 certificates provided
🔹 Packaging & Delivery
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Packed in seaworthy wooden cases or pallets
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Plastic caps to protect 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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Short lead time for standard sizes
🔹 Why Choose Our Carbon Steel SW 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 and 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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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 sales team will respond quickly with a technical and commercial offer.