METAGLAS® Type 13 — Sight Glass Flange to ANSI B16.5
The METAGLAS® Type 13 is a precision-engineered metal-fused sight glass flange
designed for installation on base flanges or weld neck flanges with a flat sealing surface.
Built to ANSI B16.5 fitting dimensions, it provides secure, high-visibility process observation
while maintaining full pressure integrity.
Suitable exclusively for flat-face flanges without sealing ledge, this unit requires a
complete gasket for reliable sealing. The fused glass-to-metal construction ensures a
permanent mechanical bond, combining optical clarity with mechanical resilience.
Design & Construction
Standard: ANSI B16.5 — fitting dimensions for base and weld-neck flanges
Flange Compatibility: Flat-face flanges only (no sealing ledge)
Sealing: Requires a full-face gasket for correct installation
Glass Bonding: Metal-fused glass with internal compressive stress for superior strength
Performance: Excellent resistance to pressure cycling, vibration, and temperature shock
Applications
Process vessels and reactors with ANSI B16.5 flange connections
Sight flow and observation ports in pressurised systems
Chemical and petrochemical plant installations
General industrial service requiring reliable optical inspection
Key Advantages:
Compliant with ANSI B16.5 dimensions for direct fitment
Flat-face design eliminates the need for sealing ledges
Metal-fused construction ensures permanent mechanical integrity
Leak-tight, maintenance-free, and vibration-resistant assembly
John Moncrieff Ltd supplies METAGLAS® Type 13 assemblies engineered
for precision, durability, and full compliance with ANSI and PED standards — delivering
uncompromising reliability in demanding process environments.
