Product Specification

ISO Full Nipples for Vacuum System: Reliable Extension for High-Vacuum Plumbing

Product Description

ISO full nipples for vacuum system are straight, double-flanged tubular fittings designed to extend vacuum lines, connect components, or provide spacing between flanges while maintaining high-vacuum integrity from atmospheric pressure down to 10⁻⁹ Torr. Also known as ISO double-flange nipples or spool pieces, these components feature identical ISO-K or ISO-F flanges on both ends and a smooth, uninterrupted internal bore.

Manufactured from high-quality 304L or 316L stainless steel, ISO full nipples are essential for vacuum chambers, pumping systems, transfer lines, and process equipment. They conform to internationally recognized ISO 1609, ISO 2861, and Pneurop 6606 standards. Unlike KF fittings which are limited to smaller diameters (up to DN50), ISO nipples are available for nominal diameters from DN63 through DN630, making them the standard choice for medium and large-scale high-vacuum systems. Whether you need to offset two components, accommodate thermal expansion, or simply add length to a vacuum line, these nipples deliver the conductance, reliability, and flexibility that demanding applications require.

Key Features & Characteristics

• Configuration: Straight tubular body with identical flanges on both ends

• Flange Types: ISO-K (clamp with centering ring) or ISO-F (bolted)

• Vacuum Range: Atmospheric to 1×10⁻⁹ Torr (UHV compatible with metal seals)

• Nominal Diameters (DN): DN63, DN80, DN100, DN160, DN200, DN250, DN320, DN400, DN500, DN630

• Lengths: Standard (custom lengths available)

• Material: 304L or 316L Stainless Steel (low carbon, UHV compatible)

• Internal Surface Finish: Ra ≤ 0.8 µm (electropolished or mechanically polished)

• Outgassing Rate: < 2×10⁻⁸ Torr·L/s·cm² (after vacuum cleaning)

• Leak Integrity: Helium leak tested to < 1×10⁻⁹ mbar·L/s

• Bakeout Capability: Up to 400°C (ISO-F with metal seals)

• Centering Ring: Elastomer or metal (for UHV)

Applications

• Vacuum line extensions: Adding distance between pumps, valves, and chambers

• Thermal expansion management: Accommodating movement in heated systems

• Instrumentation positioning: Placing gauges, RGAs, or viewports at specific locations

• Large-scale coating systems: Semiconductor, optical, and decorative PVD

• Thin-film deposition: Sputtering, evaporation, and ALD system plumbing

• Space simulation chambers: Thermal vacuum system interconnections

• Research beamlines: Synchrotron and particle accelerator vacuum systems

• Industrial vacuum processing: Metallizing, heat treatment, and drying systems

• ISO-K to ISO-F transitions: Converting between clamp and bolted standards

Why Choose Our ISO Full Nipples for Vacuum Systems?

We combine precision tube fabrication, CNC flange machining, and electropolishing to deliver ISO nipples that meet or exceed international vacuum standards. Every nipple is helium leak tested, ultrasonically cleaned with semiconductor-grade detergents, and double-bagged in a cleanroom environment. Custom lengths, mixed flange types, and UHV-grade finishes (metal seal ready, Ra ≤ 0.4 µm) are available with engineering support.