+86 13722725788 Jerry@RockCrystal.com.cn
INSULATING JOINTS
Insulating joints Insulating joints Insulating joints Insulating joints Insulating joints
         
　 　
　

　

The insulating Joints 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

　

 　

DIMENTION TABLE
PN25/ANSI 150 PN40/ANSI 200
Size AxS B C D N.W AxS B C D N.W
(Kg) (Kg)
DN25 Φ34*4 65 48 250 2.1 Φ34*4 65 48 250 2.1
DN40 Φ48*4 82 65 300 3.5 Φ48*4 82 65 300 3.5
DN50 Φ60*4 98 66 350 5.2 Φ60*4 98 66 350 5.2
DN65 Φ76*5 112 68 350 6.5 Φ76*5 112 68 350 6.5
DN80 Φ89*5 127 72 400 7.5 Φ89*5 127 72 400 7.5
DN100 Φ114*5 150 72 400 13.2 Φ114*5 150 72 400 13.2
DN125 Φ140*6 190 85 500 17 Φ140*6 190 85 500 17
DN150 Φ168*7 230 100 500 23.3 Φ168*7 230 100 500 23.3
DN200 Φ219*7 272 114 500 34 Φ219*7 272 115 500 34
DN250 Φ273*8 325 140 800 70 Φ273*8 325 144 800 70
DN300 Φ325*8 378 162 800 90 Φ325*10 395 203 800 126
DN350 Φ356*8 457 165 900 185 Φ356*12 484 205 900 227
DN400 Φ406*8 535 175 900 240 Φ406*10 545 218 900 246
DN450 Φ457*8 520 190 900 165 Φ457*10 550 250 900 245
DN500 Φ508*10 630 215 900 335 Φ508*12 630 265 900 358
DN600 Φ610*10 695 230 1000 325 Φ610*14 706 315 1000 450
DN700 Φ711*10 800 250 1200 415 Φ711*14 815 350 1200 630
DN800 Φ813*12 950 265 1300 706 Φ813*16 960 365 1300 995
　


PN64/ANSI 300 PN100/ANSI 600
Size AxS B C D N.W AxS B C D N.W
(Kg) (Kg)
DN25 Φ34*4 80 85 250 4 Φ33.4*3.91 90 100 250 5.3
DN40 Φ48*4 95 90 300 5 Φ48.3*3.91 100 100 300 6.5
DN50 Φ57*4 108 90 350 6.5 Φ60.3*3.91 115 105 350 8.5
DN65 Φ76*5 125 95 350 8.8 Φ76.1*5.49 135 120 350 13.5
DN80 Φ89*5 140 95 400 10.5 Φ88.9*5.49 155 125 500 18.7
DN100 Φ114*5 165 115 500 18 Φ114.3*6.02 190 135 500 28
DN125 Φ140*6 196 120 600 26 Φ141.3*6.55 220 150 600 41
DN150 Φ168*7 240 135 600 42 Φ168.3*7.11 255 170 600 57
DN200 Φ219*8 278 158 600 51 Φ219.1*8.18 320 187 600 90
DN250 Φ273*10 350 186 800 98 Φ273.1*9.27 372 215 800 138
DN300 Φ325*12 395 203 800 152 Φ323.9*9.53 440 235 800 193
DN350 Φ355.6*8.8 484 205 1000 213 Φ355.6*12.7 480 255 1000 272
DN400 Φ406.4*10 490 244 1000 220 Φ406.4*12.7 550 280 1000 365
DN450 Φ457*11 570 265 1000 315 Φ457.2*14.27 600 300 1000 448
DN500 Φ508*12.5 630 275 1200 421 Φ508*15.09 685 330 1200 660
DN600 Φ610*16 720 330 1200 580 Φ609.6*15.05 815 400 1200 1070
DN700 Φ711*17.5 815 375 1300 756 Φ711.2*19.05 900 440 1300 1280
DN800 Φ813*20 970 410 1300 1220 Φ812.823.8 1000 480 1300 1650