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Quick Details

  • Material: Stainless Steel
  • Technics: Forged
  • Type: insulating joint
  • Place of Origin: Guangdong, China (Mainland), Shanghai, China (Mainland)
  • Model Number: DN800
  • Brand Name: changhao, Changhao
  • Connection: Welding
  • Shape: Equal
  • Head Code: round
  • products: insulating joint
  • size: 1''-60''
  • Insulating resistance: more than 10 MΩ at DC 1000V
  • dimension code: ASME B16.25

Packaging & Delivery

Packaging Details wooden cases
Delivery Time 10 days


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 companys insulating connectors 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, etc. The insulating connectors have realized buried parts maintenance-free function and allow a service life matching the pipelines. 

Technical characteristics:


Pressure grade:PN1.0-PN40MPa

Service life:same as the service life of pipeline

Ambient temperature:-30°C-90°C

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


Quality requirement:


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

Insulating intensity: no breakdown or arc for one minute @2500V 50Hz

Hydraulic pressure testing pressure: 1.5 times of desingned pressure

Air-tight testing pressure: equivalent to designed pressure

Non-destructive testing: All the butt-connectors are 100% ray-detected according to JB4730-94; other pressure welding
seams are 100% magnetic power detected.
Groove: adopt AP15L standard

Quality requirement:


This product adopt's material satisfy below request

Insulanting meterial: hign strength epoxy resin and fiberglas stratification composite material

Bends intensity: Lengthways≥390MPa Side direction≥290MPa

Pulls stretch intensity: Lengthways≥340MPa Side direction ≥240MPa
Compressive intensity:≥390MPa Water-absorbing≤30mg

Scaks in water behind resistance≥5x108Ω Breakdown resistance≥35KV

Assemblies steel: 16Mn JB4726; ASTM A694 F52 F60

Short pipe 20# 16Mn GB8163-99 X70 X65 X56 X52 X46 API SPEC.5L

Sealing material: O shape or U shape gland ring: Rubber fluorine, Jing base butadiene rubber, According ASTM D2000

Lining material: Cold solid colophony

Insulating paint: Imports liquid epoxy resin

Anti-corrosin insulating material: two-component solvent-free epoxy coating, anti-corrosion thermal contraction bushing

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China (Mainland) | Trading Company
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