A flexible corrosion-resistant sleeve that withstands welding heat and prevents liquids from reaching the weld zone.
The innovative sheet-metal design permits the flexibility that’s vital to easy insertion, sealing, and weld quality.
The unique bore seal works in conjunction with the sleeve flexibility to permanently seal off the weld zone from liquids.
Flexibility: Thin, flexible profile adjusts to pipe ovality for easy insertion and consistent weld & seal quality.
Sealing: Unique bore seal design accommodates pipe ID tolerance and utilizes sleeve flexibility to seal off weld zone.
Heat Resistance: Wide, thick insulation keeps weld heat from damaging protective coating. Permits a long internal pipe coating holdback and normal welding time.
Light Weight: Allows for easy handling and insertion.
Large Diameter Pipelines: Flexibility, seal design, and light weight makes FlexSleeve suitable for pipe up to 80” diameter.
Long Distance Pipelines: Fast and easy sleeve installation. Normal weld times. Functions with internal pipe alignment clamps for automatic welding.
Silicone grease for lubricant.
Sleeve OD metal often interferes with pipe ID when pipe ends are out-of-round.
Solid steel does not conform to pipe ovality.
Sleeve conforms to pipe shape, creating even seal pressure around entire circumference.
Solid machined steel does not easily expand and utilize pipe pressure to enhance seal pressure.
O-rings not designed to seal with pipe ID & ovality tolerance range.
Image of FlexSleeve after hydrotest. Pipe milled away to see bore seal functionality.
The pipe is charged to pressures exceeding 300 bar (4,350 psi) without any weld at all.
FlexSleeve’s unique seals prevent liquid from reaching the weld zone and causing corrosion.
1/8” thick x 4” wide insulation
Raised center hump allows for consistent, high-quality root pass around entire circumference. Avoids slag entrapment that may occur when OD of sleeve is far from pipe ID.
250° F (120° C) max interpass temperature before starting next weld pass.
AUT, MUT, and RT examinations performed on completed welds are consistently approved by independent labs and inspectors.
FlexSleeves work with external automatic welding & internal lineup clamps.
Our welded joint system changes the way internally lined pipelines are built. At last, a system that uses ordinary construction methods AND provides long-term protection from internal corrosion and erosion. It’s what’s on the inside that counts.
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