Insulating joint

Dimension specification: 1"~60"

Pressure grade: class150~2500
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: ≥3.5kv
Insulating intensity: no breakdown or one minute @2500v 50HZ
Hydraulic pressure testing pressure: 1.5times of designed 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 API 5L standard

Material Requirement

This product adopt’s material satisfy below request:

 
Insulating material: high strength epoxy resin and fiberglass stratification composite material
Bends intensity: lengthways ≥390 MPa Side direction ≥290 MPa
Pulls stretch intensity: lengthways ≥340 MPa Side direction ≥240 MPa
Compressive intensity: ≥390 MPa water –absorbing ≤30mg
Soaks in water behind resistance: ≥5*108Ω Breakdown resistance ≥35kv
Assemblies steel: 16Mn JB4726; ASTM A694 F52, F60
Short pipe: 20# 16Mn GB8163-99 X70 X65 X60 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-corrosion insulating material: two-component solvent-free epoxy coating, anti-corrosion thermal contraction busing