Isolated joint

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