The insulating joint is a new generation developed product to resolve use problems of old insulating flange. It is the essential pressure component necessary for steel pipeline cathodic protection system, broadly applicable to steel pipeline cathodic protection systems. Our company s insulating joint adopts a unique design based on referencing foreign lasted product structure to overcome problems of inadequate rigidity, prone to leak, unable to be buried under ground, short service life, etc. The insulating connectors have realized buried parts maintenance-free function and allow a service life matching the pipelines.

Technical characteristics:

Dimension specification: DN15-DN1200.

Pressure grade: PN1.0PN40MPa.

Service life: same as the service life of pipeline.

Ambient temperature: -3090

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

Quality requirement:

Insulating resistance value ≥10 MΩ @DC1000V,Maximum voltage: ≥3KV

Insulating intensity: no break down or acc for one minute@2500Hz.

Hydraulic pressure testing pressure: 1.5 times of designed pressure.
Air-tight testing pressure: equivalent to designed pressure.

Non-destructive testing: All the butt-connectors are 100 ray-detected.

According to JB 4730-94;other pressure welding seams are 100 magnetic power detected.

Groove: Adopt AP15L standard.