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The ElectroStop® monolithic isolation joints are a leak-proof, maintenance-free and long lasting block against the flow of electric current in all piping systems. The ElectroStop® eliminates short circuits and field assembly. The ElectroStop® is coated internally and externally to prevent corrosion and is 100% hydrostatically, electrically and weld tested. All ElectroStop® monolithic isolation joints are manufactured under an ISO Quality Management System.
Monolithic isolation joints shall be bolt less and completely factory assembled in accordance with the appropriate requirements of ASTM, API, DIN and BS codes. All welds shall be butt weld construction. The dielectric isolation material shall be a high temp thermosetting fiberglass epoxy material. Sealing shall be by dual static, self energized “O” ring seals housed in accurately machined grooves, fully protected from cavitation in full compliance with ASME design codes. Each unit shall be tested for Electrical (@5kv, 25 Mohm), Hydrostatic (@ 90% of burst pressure.) and Weld (Ultrasonic/Magnetic Particle). The Monolithic Isolation Joint shall be the Electro-Stop® Isolation Joint as manufactured by GPT.
Eliminates Short Circuits
Bolts, sleeves and washers — the major source of short circuits in most isolation assemblies — are eliminated with the ElectroStop® monolithic isolation joint. Each joint is electrically tested during production to assure integrity, performance and isolating properties.
Eliminates Field Assembly
The ElectroStop® isolation joint is completely factory assembled and tested. There are no flanges, gaskets, nuts, bolts, sleeves or washers to handle and consequently no fluid leaks due to improper field assembly.
Coated Both Internally and Externally
A two-part bonded epoxy is sprayed to within 2” (50.8mm) of each weld end. Each joint is tested for coating thickness uniformity and for coating holidays.
100% Hydrostatically Tested
All ElectroStop® joints undergo hydrostatic pressure tests at 90% of burst pressure determined by barlows formula for each individual ElectroStop®. Testing is normally conducted for 60 minutes on 3” to 48” joints, but can be longer upon customer request. A pneumatic test is held at 10 psi for 10 minutes.
Completely Weld Inspected
All ElectroStop® joints undergo a weld inspection with a combination of phased array ultrasonic testing (PAUT), visual testing (VT), and magnetic particle testing (MT) on all welds. In addition, radiography testing (RT) can be conducted upon request. All ElectroStop® joints are manufactured under an ISO 9001;2015 Quality Management System.
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