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ASA HV Half Nipples (Grooved Flange)

ASA HV Half Nipples (Flat Flange)

ASA HV Half Nipples (Flat Flange): Compact Straight Nipples for ASA Grooved Flange Sealing

ASA HV Half Nipples (Flat Flange) from TFM are precision-fabricated components designed for streamlined connection to grooved ASA flanges in high-vacuum (HV) systems. These nipples feature a single fixed flat ASA flange, ideal for mating against a grooved flange with an elastomeric o-ring, in accordance with standard ASA sexed flange geometry.

Constructed from high-purity 304L stainless steel tubing, these half-length spools offer a reliable and compact solution for equipment terminations, port interfaces, or modular vacuum assemblies where footprint and sealing integrity are essential.

Key Features of ASA HV Half Nipples (Flat Flange):

  • Single Flat ASA Flange
    Designed to compress against a grooved ASA flange with an o-ring in between, supporting secure vacuum sealing down to 10⁻⁸ Torr.

  • 304L Stainless Steel Construction
    Ensures strong resistance to corrosion, thermal cycling, and chemical exposure—perfect for demanding HV environments.

  • Compact and Versatile Form Factor
    Half-length design makes it ideal for tight-space configurations, flange terminations, or direct-mounting accessories.

  • Rotatable Flat Flange for Easy Alignment
    Simplifies installation by allowing precise orientation during assembly.

  • Vacuum-Grade Fabrication
    All ASA HV Half Nipples (Flat Flange) are helium leak tested and vacuum-cleaned to meet industry-standard HV specifications.

  • Standard and Custom Dimensions Available
    Offered in common ASA sizes (e.g., 4″, 6″, 8″, 10″, 12″) with options to customize tube diameter, length, or flange dimensions.

Typical Applications:

  • Mating with grooved ASA flanges on chamber or pump ports

  • Terminating diagnostic instruments, valves, or viewports

  • Vacuum line stubs or port extensions in modular ASA systems

  • Custom adapter interface to flexible lines or fittings

  • Compact connection points for retrofits or upgrades

TFM also supplies grooved ASA flanges, o-rings (FKM, Buna-N), bolt kits, and blanking flanges for complete integration with your high-vacuum assembly.

In conclusion, ASA HV Half Nipples (Flat Flange) offer a durable, clean, and compact solution for connecting flat-to-grooved ASA flanges within HV environments. Their straightforward design and stainless steel construction ensure performance, flexibility, and reliability in any ASA-standard system.

Ordering Table

Flange Size/OD Drawing Nominal Tube OD Dim A Part Number
ASA 1.5 (5.00" OD) Tooltip 2 3.25 AFH05X020
ASA 2 (6.00" OD) Tooltip 2 3.5 AFH06X020
ASA 2 (6.00" OD) Tooltip 2-1/2 3.5 AFH06X025
ASA 2 (6.00" OD) Tooltip 3 3.5 AFH06X030
ASA 3 (7.50" OD) Tooltip 3 4.13 AFH07X030
ASA 3 (7.50" OD) Tooltip 4 4.13 AFH07X040
ASA 4 (9.00" OD) Tooltip 4 4.13 AFH09X040
ASA 8 (13.50" OD) Tooltip 8 7.75 AFH13X080

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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