Station Equipment
Insulating Joint
Product Overview
The insulating joint is the essential pressure component necessary for steel pipeline cathodic protection system, broadly applicable to steel pipeline cathodic protection systems. The Insulation Joints we supply adopts a unique design as per ASME VIII1,Appendix 2 standard and ASME B31.3 code, 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, etc. The insulating joints have realized buried parts maintenance-free function and allow a service life matching the pipelines.
Product Structure
Technical Characteristics
Design code : ASME VIII-1, Appendix 2 and ASME B31.3
Dimension specification : DN15-DN3000
Design pressure : 1.0-40MPa
Service life : Same as the service pipeline
Testing and Inspection Standard
- Hydraulic pressure testing with 1.5 times of designed pressure
- AC3000V applied voltage test
- DC1000V insulating resistance value test
- Visual check
- Dimension check
- 5% the hydraulic added bending test
- 5% the hydraulic circulation (fatigue) test
- 5% submerging electrolysis fluid insulting intensity testing
- 5% the thickness of coated dry velum test
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