Pipe Isolation Kits

Schallert line stop flanges are available in carbon steel and stainless steel. Sealing elements are commonly made from polyurethane, while optional materials such as Buna-N, EPDM, and Viton are available for high-temperature or chemically aggressive applications. AIS material compliance is also available upon request for projects requiring specific material standards.

An isolation flange is a fitting welded or saddled onto a pipeline that provides access for a line stop head to enter and seal the pipe. Schallert's line stop flanges feature a push-style completion plug secured with set pins accessible from the outer diameter, with optional o-ring sealing for added leak protection. They are available in sizes from 4 inches to 48 inches.

A flange kit in pipeline isolation typically includes the line stop flange, completion plug, set pins, blind flange, and associated bolt hardware required to complete a line stop operation. Schallert supplies complete flange kits — including optional contoured nozzles for direct pipe welding — compatible with their full range of completion plug setting tools and adaptable to other methods of plug setting.

Schallert Enterprises manufactures pipe isolation kits for pipelines ranging from 3/4 inch up to 84 inches in diameter. The folding head linestop machines cover sizes from 8 inches to 84 inches, while pivoting head machines handle high-pressure applications. Custom configurations are available to accommodate non-standard pipe sizes and unique project requirements.

Yes. Schallert pipe isolation kits are specifically designed for live, pressurized pipeline operations. Folding head and pivoting head linestop machines can seal pipelines at pressures up to 150 psi for standard sealing elements, while the pivoting head models support up to 450 psi at 250°F, making them suitable for high-pressure industrial, mill, and refinery applications.

Schallert Enterprises offers select pipe isolation kit components — including certain folding head linestop machines — for both purchase and rent. Models such as the FH7248, FH3024, FH1008, and FH1612 are available for rental, making them a cost-effective option for contractors performing one-time or infrequent line stopping jobs. Contact Schallert for current rental availability and pricing.