Overview
EN ISO 10692-1:2001 - “Gas cylinders - Gas cylinder valve connections for use in the microelectronics industry - Part 1: Outlet connections” defines outlet connection types, dimensions and performance requirements for cylinder valve outlets used where the highest cleanliness and freedom from particles are required (microelectronics and similar special applications). It is the international ISO text adopted by CEN (EN ISO 10692-1:2001).
Key topics and technical requirements
- Scope: Outlet connections for valves used with pure gases and gas mixtures in ultra‑clean applications; intended to ensure interchangeability and contamination control.
- Materials: Recommended materials include AISI 316L (microfinished) for valve and nipple with minimum hardness ~130 HBW and AISI 304 (silver plated thread) for the union nut. Other materials allowed if equivalent in strength and corrosion resistance (see ISO 11114‑1).
- Sealing and gaskets: Default gasket is a recessed, flat Ni‑200 (nickel) fully annealed gasket with hardness 80–100 HBW and sealing surface finish ≤ 0.8 µm. Note: nickel gaskets are typically single‑use.
- Leak integrity: Tightness requirements are specified using helium leak testing: outboard leak rate ≤ 1 × 10‑8 mbar·l·s at 137 bar when tightened to 50 N·m; inboard leak rate to meet corresponding limits.
- Design features: Anti‑rotation keys on nipple and valve, union nut with venting holes, and detailed concentricity tolerances (e.g., diameters concentric within 0.05 mm) to prevent incorrect mating and ensure safety.
- Series and dimensions: Connection series covered include 630/640 and 710/720 families; detailed dimensions, thread profiles (clause 9) and mandatory diameters are provided in figures and tables.
- Allocation guidance: Annex A gives mandatory outlet allocations for selected single gases; Annex B provides worked examples for allocating other gases and mixtures.
Applications and users
- Cylinder and valve manufacturers designing or certifying ultra‑high purity (UHP) gas connections for microelectronics.
- Gas suppliers and distributors specifying valve outlets to avoid cross‑contamination.
- Semiconductor fabs, analytical labs and surface‑engineering facilities that require trace‑contaminant control.
- Quality, safety and compliance engineers responsible for leak testing, material compatibility and component interchangeability.
Related standards
This standard helps ensure safe, leak‑tight, and particle‑controlled cylinder valve connections optimized for the microelectronics industry and other demanding UHP gas applications.
