Performance Parameter of Insulating Joint

1.Insulating Property: 2500V test insulating resistant≥200MΩ
2.Hydrostatic test: 1.5 times pressure
3.Air-tight test: equal pressure
4. Non-destructive test: 100% radiographic inspection for all joint according to JB 4730-94; Other weld seam by 100% magnaflux inspection
5.Beval: accordng to API 5L

Technical Features of Insulating Joint

1.Specification :DN15~DN3200
2.Pressure Class: PN1.0~PN42MPa
3.Life Span: same as line pipes
4.Suitable Medium: oil, gas, water
5.Working Tempreture:-19°C ~ +70°C

Welded Line pipe Material

1.API 5L X Series pipe
2.GB/T8163 10#, 20# steel pipe
3.GB/T3091 Q235B steel pipe
4.GB/T9711.1 L Series pipe

Insulating Material & Features

1.Insulating material: hight density epoxy resin and glass fibre shape composite material ASTM D709 G11
2.Bending strength: lengthway≥390MPa,cross≥290MPa
3.Tensile strength: lengthway≥340MPa,coss≥240MPa
4.Compression strength:≥340MPa,hydroscopicity≤30mg
5.Electric resistance in water≥5×108Ω,resistance to sparking≥35KV
6.Combination steel:16Mn JB4726,ASTM A694 F52,F60
7.Short pipe: 20#,16Mn,GB/T8163-99
8.X70,X65,X60,X56,X52,X46,API SPEC.5L
9.Insulating material:O-ring or U-shape sealing ,fluorine rubber, nitrile butadiene rubber
10.Filling Material: cold curling resin
11.Insulating coating: imported liquid epoxy resin
12.Anti-corrosive material: Heat shrinkable anti-corrosion materials