Hydrostatic Test / Isolation Plugs

GripTight™ High Pressure Test Plugs

I.D. Sealing Version
Pressures to 14,000 psi (960 Bar)
Sizes from .93" to 8.53" (23.6mm - 216.7mm) In Stock
Larger Sizes through 42" (1066.8 mm Available

Note: For sizes smaller than .93" see SQ2
For sizes larger than 8.53" - Contact factory

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Test Open End Pipes, Pipelines, Tubes and Pressure Vessels Quickly and Safely

High pressure pipe testing is safer than ever before, thanks to EST's GripTight™ High Presure Test Plug. Unlike other plugs that can loosen and eject under high pressure - even becoming dangerous projectiles - the GripTight actually uses test pressure to seal more securely against the pipe's inner diameter. The greater the pressure - the greater the grip! The result is safer installation, better sealing and all around safer testing.

Features & Benefits

Safe: Pressure on plug squeezes grippers tighter; plug can not be ejected under pressure when properly installed.
High Pressure Performance: Have been used for pipe burst tests in a manufacturing environment. Tests at higher pressure with greater safety, typically to 80% of yield.
Eliminates Weld Caps: No welding or cutting required. Speeds fabrication testing, reducing test times up to 80%.
Engineered Seal Design: Reduces seal wear for long lasting performance.
Optional High Pressure Pipe Cap: Plugs can be used in solid or ported configurations.
Positioning Washer: Prevents plug loss in pipe end, and eliminates plug lock-up after hydro test, common with inferior plug designs.
Retaining Spring: Assures retraction of gripper segments. Superior to O-ring design.
Easy to Maintain: Replacement seals and grippers readily available and easy to replace.
Super Stock: 1" to 24" in Sch 40 and 80 (DN25 to DN200) sizes are in stock for same or next day shipment. Larger sizes through 42" (1,066.8 mm) also available - Contact factory.
Optional Seals: Viton®, Silicone, EPDM.
Quality Assurance System: Manufactured under a Quality Assurance Program certified to ISO 9001:2000 and several U.S. nuclear industry standards including ANSI N45.2, NQA-1, 10CFR 50 Appendix B, and 10CFR 21.

Viton® is a registered trademark of DuPont Dow Elastomers

Literature (PDF)

GripTight Test Plug Literature (DC1204)

Operating Instructions (PDF)

Technical Papers (PDF)

ISO9001 Quality Assurance Manual - 19 pages (QA0100)

Expansion Seal Technologies

Hydrostatic Test / Isolation Plugs

GripTight™ High Pressure Test Plugs

Test Open End Pipes, Pipelines, Tubes and Pressure Vessels Quickly and Safely