Blackhawk full-encirclement LineStop fittings are available in ANSI 150, 300, 600 and 900 Series from 4” through 48” sizes. Split sleeve fittings are also manufactured with side outlet, spherical configurations and with a weld neck flange for hot tapping. LineStop Flanges and Completion Plugs are also available. LineStop Fittings are compatible with specific tapping and plugging equipment and are designed to carry the extra loads imposed during hot tapping and line stopping operations. All fittings can be designed to ASME/ANSI B31.8 (Gas Pipelines); B31.4 (Liquid Pipelines); B31.3 (Chemical Plants & Refineries); B31.1 (Power Plants); DOT 192 Federal Regulation for gas pipelines; DOT 195 Federal Regulation for liquid pipelines and most international codes.