Monolithic insulation joints are welded, prefabricated, three-piece joints used on pipelines to provide electrical isolation to prevent corrosion. They provide current dispersion on the cathodic protection system. They provide electrical isolation between the pipeline section and adjacent structures and pipelines.

What is the purpose of a monolithic insulation joint?

The purpose of installing insulated joints on gas and oil pipelines is to ensure electrical isolation between sections of the pipeline and to prevent harmful electrochemical interactions between the sections. Insulation joints are also used to ensure effective current dispersion on cathodic protection systems.

Design Standard: ASME CODE Section VIII Division.1 UNI CIG 10285

Material:

Technical characteristics:

Size range: DN25(1")~DN200(48")

Pressure class: ANSI 150~ANSI600(up to ANSI1500)

Working temp: -10 - +90°C

Suitable media: Gas, Oil, Water

100% Hydrostatic test: 1.5times MOP

100%Electrical resistance: ≥100MΩ(1000V DC) under dry air, 25°C

100% dielectric strength : 3.5KV/50Hz(1min)(max up to 5KV as per request)

100%Coating thickness: ≥300um

100% Appearance and dimension inspection service life:same as the service life of the pipeline

Ambient temperature:-30°C-90°C

Applicable medium: oil, gas, water, chemical feed, mineral slurry