ASTM A105 Threaded Flange (NPT) | ASME B16.5
Carbon Steel NPT Threaded Flange | ASME B16.5
ASTM A105 threaded flanges (NPT) are forged carbon steel flanges designed for threaded pipe connections without welding.
Manufactured in accordance with ASME B16.5, these flanges feature NPT internal threads and are commonly used in low-pressure and non-critical piping systems, where welding is not desirable.
ASTM A105 NPT threaded flanges provide easy installation, maintenance flexibility, and cost-effective performance in a wide range of industrial applications.
What Is ASTM A105?
ASTM A105 is a standard specification covering forged carbon steel piping components for ambient and high-temperature service.
Threaded flanges made from ASTM A105 are typically supplied in the as-forged or normalized condition, depending on project requirements.
NPT Threaded Flange Design
Threaded flanges are machined with female NPT threads in accordance with ASME B1.20.1, allowing them to be screwed directly onto threaded pipes.
Dimensions & Standards
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Material Standard: ASTM A105 / ASME SA105
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Flange Standard: ASME B16.5
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Facing Types:
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Raised Face (RF)
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Flat Face (FF)
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Pressure Classes:
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Class 150
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Class 300
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Class 600
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(Higher classes are generally not recommended for threaded flanges.)
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Size Range: 1/2″ – 24″
Inspection & Quality Control
ASTM A105 threaded flanges are supplied with standard inspection and testing, including:
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Chemical composition analysis
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Mechanical property testing
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Dimensional inspection
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Thread gauge verification
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Visual examination
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Certification: EN 10204 3.1
ASTM A105 threaded flanges (NPT) manufactured to ASME B16.5 offer a practical and economical solution for threaded piping systems where welding is not required.
With reliable material performance, standardized threading, and easy installation, A105 NPT flanges are widely used in industrial and utility applications.
Related Products
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ASTM A105 Slip-On Flanges
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ASTM A105 Weld Neck Flanges
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ASTM A105 Blind Flanges
