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Custom Stub End Flanges | Any Size & Material OEM Support
Stub End flange
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Custom Stub End Flanges | Any Size & Material OEM Support

Stub End Flanges (also called Lap Joint Stub Ends) are specialized pipe fittings designed for removable flange connections. They consist of two parts:
Stub End – A short pipe section with one end beveled for welding to the pipe and the other end flared (raised face) to match a lap joint flange.
Lap Joint Flange – A loose flange that slides over the pipe and bolts to another flange, while the Stub End provides the sealing surface.

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    Key Standards & ComplianceZ

    Standard System

    Typical Codes

    Regions

    ASME

    B16.9, B16.25

    Americas, Middle East

    EN (European)

    EN 10253-2

    Europe

    MSS (Manufacturers Standardization Society)

    SP-43

    General Industry

    Why Use Stub End Flanges?

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    Easy Maintenance

    The Lap Joint Flange can be rotated or removed without cutting the pipe.
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    Cost-Efficient

    Only the Stub End needs replacement (cheaper than full flange replacement).
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    Alignment Flexibility

    The loose flange allows 360° bolt hole adjustment during installation.
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    Corrosion Resistance

    Stub Ends can be made from stainless steel (304/316), duplex steel, or coated carbon steel for harsh environments.

    Common Applications

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    Common Applications

    Oil & Gas – Pipeline systems requiring frequent inspection

    Chemical Plants – Corrosive fluid handling

    Water Treatment – Systems needing regular cleaning

    Shipbuilding – Compact piping layouts

    Important Notes

    Never use a Stub End alone! It must be paired with a Lap Joint Flange.

    For high-pressure/temperature applications, verify flange thickness & material strength.

    Application

    application

    Quality Control Process Chart

    Quality Control Process Chart

    Quality control test

    Quality control test

    During raw materials,manufacturing,inspection and delivery process,all norms are strictly abided by and process control will be well carried out.All reports will be issued timely to do analysis.

    We have devoted a great deal of effort to the process control and management practices in accordance with traceability and consistency of quality will be continually implemented.

    In-house control quality inspection:
    Spectrometer Detection and Analysis of Chemical Elements
    Metallographic Analysis
    Mechanical Property Testing(Hardness, Tensile Strength, Yield Strength, Elongation, Reduction of Area, Charpy-Impact)

    Ultrasonic, Portable Direct Reading Spectrometer, Macro Erosion Test, Intergranular Corrosion Test, Penetration Test, Magnetic-particle Inspection, Size Inspection, Visual check, We’ll do special tests as per clients'demand and accept the third party inspection actively.

    FAQ

    • Q: How does your factory do regarding quality control?

    • Q: May I have some samples before bulk order?

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    • Q: What is the payment terms?

    • Q: What's your delivery time?

    • Q: Is it OK to mark my logo on your products?