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Insulating Joint |
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Monolithic Insulating Joint |
Gas Insulating Joint
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Gas Insulating Joint |
PLG Insulating Joint
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Monolithic Insulating Joint |
Oil Insulating Joint
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Genaeral Description of Insulating Joint |
| Insulated joints in pipelines may be subject to overvoltage failure due to lightning and, in some applications, AC voltage. When a pipeline is near an electric transmission line, it can be subject to significant AC voltage if a phase-to-ground fault occurs. Over-voltage protection against both lightning and AC fault current is possible using appropriately rated products. |
Structure of Insulating Joint |
Insulating Joint consist of following part: Short section pipe, Fixed ring, insulating part, sealing part and insulating coating. Between short section pipe there are insulating part and sealing part to form a double sealing structure of insulating property. The fixed ring are beveled for welding or directly welding with the short pipe to form a "sealing space " . This will largely enhance the insulating effect and also the anti-pressure capability. |
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Sealing style of Insulating Joint |
Insulating Joint has good insulating effect and long life-span. the sealing system is very important for insulating effect. At present, the Monolithic Insulating Joint adopt "U" type sealing ring to achieve double insulating system. |
Performance Parameter of Insulating Joint |
1.Electrical Resistance: 1000V test insulating resistant¡Ý200M¦¸
2.Dielectrical voltage: >= 3.5kv AC 50Hz (1 minute) (Can be 5kv as per request)
2.Hydrostatic test: 1.5 times pressure
3.Air-tight test: equal pressure
4.100%RT Examination on weld seams
5.Beval: ASME B16.25 |
Technical Features of Insulating Joint |
1.Specification :1/2"¡«128"
2.Pressure Class: PN0.6¡«PN42MPa
3.Life Span: same as line pipes
4.Suitable Medium:oil, city gas, nature gas, LNG, LPG, etc
5.Working Tempreture:-19¡æ ~ +120¡æ |
Welded Short Pipe Material |
1.API 5L Gr. B,X42,X46,X52,X56,X60,X65,X70,X80.
2.S235 JR,16Mn,20#,Q235.
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Insulating Material & Features |
1.Insulating material: hight density epoxy resin and glass fibre shape composite material.
2.Bending strength: lengthway¡Ý390MPa,cross¡Ý290MPa.
3.Tensile strength: lengthway¡Ý340MPa,coss¡Ý240MPa.
4.Compression strength:¡Ý340MPa.
5.Combination steel:ASTM A694 F42,F46,F52,F56,F60,F65;ASTM A105;16Mn,20#,ect.
6.Pipe-pups:API 5L X42,X46,X52,X56,X60,X65,X70,X80;S235 JR;Q235;20#;16Mn.
7.Insulating material:O-ring or U-shape sealing ,fluorine rubber, nitrile butadiene rubber.
8.Filling Material: cold resin.
9.Coating: imported liquid epoxy resin.
10.Anti-corrosive material: Heat shrinkable anti-corrosion materials. |
Specification of Monolithic Insulating Joint |
Pressure : ANSI 150LB |
Pressure : ANSI 200LB |
Pressure : ANSI 300LB |
Pressure : ANSI 600LB |
Pressure : ANSI 900LB |
Pressure : ANSI 1500LB |
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