Insulating Joints Manufacturers,Supplier and Exporters in China

Shanghai Changhao High Pressure Pipe Fittings Co., Ltd
Shanghai Changhao International Co., Ltd

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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 (Kg)	AxS	B	C	D	N.W (Kg)
DN25	Φ34*4	65	48	250	2.1	Φ34*4	65	48	250	2.1
DN40	Φ48*4	82	65	3.5	3.5	Φ48*4	82	65	300	3.5
DN50	Φ60*4	98	66	5.2	5.2	Φ60*4	98	66	350	5.2
DN65	Φ76*5	112	68	6.5	6.5	Φ76*5	112	68	350	6.5
DN80	Φ89*5	127	72	7.5	7.5	Φ89*5	127	72	400	7.5
DN100	Φ114*5	150	72	13.2	13.2	Φ114*5	150	72	400	13.2
DN125	Φ140*6	190	85	17	17	Φ140*6	190	85	500	17
DN150	Φ168*7	230	100	23.3	23.3	Φ168*7	230	100	500	23.3
DN200	Φ219*7	272	115	34	34	Φ219*7	272	115	500	34
DN250	Φ273*8	325	144	70	70	Φ273*8	325	144	800	70
DN300	Φ325*8	378	162	90	90	Φ325*10	395	203	800	126
DN350	Φ356*8	457	210	185	185	Φ356*12	484	205	900	227
DN400	Φ406*8	535	220	240	240	Φ406*10	545	218	900	246
DN450	Φ457*8	520	190	165	165	Φ457*10	550	250	900	245
DN500	Φ508*10	630	265	335	335	Φ508*12	630	265	900	358
DN600	Φ610*10	695	250	325	325	Φ610*14	706	315	1000	450
DN700	Φ711*10	800	250	415	415	Φ711*14	815	350	1200	630
DN800	Φ813*12	950	950	706	706	Φ813*16	960	365	1300	995

PN64/ANSI 300						PN100/ANSI 600
Size	AxS	B	C	D	N.W (Kg)	AxS	B	C	D	N.W (Kg)
DN25	Φ34*4	80	85	250	4.0	Φ33.4*3.91	90	100	250	5.3
DN40	Φ48*4	95	90	300	5.0	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