https://www.stahlrohr-fittings....-flansche.com/zunge-

Tongue & Groove Flanges, ASME B16.5 / B16.47 / B16.36 / Groove & Tongue Flange

Manufacturer, Supplie & Exporter of Tongue & Groove Flanges, ASME B16.5 / B16.47 / B16.36 / Groove & Tongue Flange Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS.