Insulation Connector

The insulating joint is the essential pressure component necessary for steel pipeline cathodic protection system, broadly applicable to steel pipeline cathodic protection systems, adopts a unique design based on referencing foreign latest product structure  to overcome problems of inadequate rigidity, prone to leak, unable to be buried under ground short service life, ete.

Design specifications：

BPV  Code Sect Ⅷ Div.ⅠAppendix2  GB150

Design code：ASME B31.3  GB50253

Technical characteristic：

•  Dimensions ：DN15～DN1200

•  Pressure grade：PN1.6～PN40.0MPa

•  Service life：same as the service life of pipeline

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

•  End slope meatus：in accordance with  ASME B31.4 and the regulations for welding technics

•  Installation place：buried-levelly under the earth

Quality inspection:  

• 100% insulating resistance value test： ≥10MΩ@DC1000V

• 100% insulating intensity test：no breakdown or arc for one minute @5000V 50Hz 

• 100% hydraulic pressure testing pressure: 1.5 times of designed  pressure

• 100% air-tight testing pressure：equivalent to designed pressure

• 100% non-destructive testing：to 100% the crack detection of the weld line of all the butt-connectors by ray accordance with ASME  BPV Code Ⅷ UW-51，App.12，App.6 or JB4730, other welding line  are 100% detected by ray or magnetic power.

• 100% surface of end slope examination

• 100% hardness test on weld joints

• 5% submerging electrolysis fluid insulating intensity testing：≥6MΩ

• 5% hydrostatic pressure plus bending test ：longitudinal stress 72%×the regulated test bending intensity.

• 5% hydrostatic pressure fatigue test：1MPa～85% hydrostatic  pressure test for 40 cycles

• 100% the thickness of coated dry velum test

• 100% visual and dimensional check

•  5% coat adhering test

Material s characteristics：

• Assembled parts：according to ASTM A694 F52/JB4726

• Stub end：same with pipeline material

• Insulating material：ASTM D709 G11 or GB1301.1-1998 high strength epoxy glass

• Filling material：high strength epoxy resin

• Sealing material：rubber fluoride 26

• Sealing stickiness：silicon rubber

• Internal & external surface anti-corrosion insulating material：two- component solvent-free epoxy coating, anti-corrosion thermal contraction bushing. 

After-sales service

We promise that:

We answer and solve your questions and consult within 24 hours.

We arrive to the domestic job site within 48 hours from the time you asked.

Overseas job site service available.

Service telephone: +86-24-88256563

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