Sonotech Echogel

Sonotech Echogel

Economical Ultrasonic Couplant

Echogel® 20 is an economical, basic-use couplant in medium-thick gel viscosity for ultrasonic inspections, like flaw detection/sizing and thickness gauging, where salt cake or metal corrosion salts are present. Echogel® 20 offers outstanding wetting capabilities and will quickly wet oily and dirty surfaces. It provides good corrosion inhibition and resists viscosity breakdown on salt-caked boilers and other corroded materials. 

Echogel® 20 is available in the following sizes:

  • 1 gallon cube
  • 5 gallon cube
  • 55 gallon drum

Features

  • Enhanced surface wetting to quickly cover oily or dirty surfaces
  • Maintains viscosity on corrosion or salt cake
  • Good corrosion inhibition
  • Silicone free
  • Hydrogen embrittlement testing

Specification Compliance

  • API
  • ASTM F519
  • AWS
  • ASME

Applications

  • Defect Location: subsurface
  • Ideal for:
    • Flaw detection & sizing
    • Thickness gauging
    • Power generating boilers
    • Corroded parts
    • When corrosion, salt, or salt cake is present
    • Large volume flaw inspections
    • Small diameter pipes
    • Weld inspection
    • High strength steel
    • OCTG
    • Tubular goods
    • Pipes, pipe components, connections & couplings

Technical Specifications

Echogel Specifications

Appearance: Transparent gel
Color: Light green
Comparative Viscosity*: 5.5
Actual Viscosity: ~75,000 cps (LV #4 @ 6 rpm)
Long Velocity: 1.55 cm/sec
Impedance: 1.60 Mrayls
Acoustic Performance: 50
Silicone: No
Glycerin: No
Propylene Glycol: Yes
Water Soluble: Yes
Halogens: < 50 ppm
Sulfur: < 50 ppm
Temperature Range†: 27° to 140°F (-3° to 60°C)
Storage Temperature: 50° to 86°F (10° to 30°C)
Compatibility: Most composites and metals

* Subjective measure, 0–10 scale where 0 = water, 5 = medium gel, 10 = very thick paste.

† Couplant integrity and acoustic performance may decline beyond these temperature limits.

How It Works

Step 1: Apply Couplant

Apply a small amount of couplant to the transducer or inspection area before measurement.

Step 2: Removal

Remove couplant immediately after inspection before the couplant dries with water rinse or a combination of water rinse and brushing. A film may form if the couplant is allowed to dry before removal. Remove film by pressure washing, wire brushing or immersing the part in water until the couplant rehydrates and can be washed or brushed off.

Step 3: Storage

Store couplant in the original container. Do not freeze. Store out of direct sunlight. Keep container closed when not in use. Never put unused couplant back into the original storage container. If pumps or valves are used to dispense bulk couplant, wash them thoroughly between drums to avoid contaminating new product.

Description Part # Saved Price Select Option Add to
Sonotech Echogel Grade 20 (specify packaging)
Model #
UT-SO-48-901 - Master $77.00