Specifications of  Insulation Flange

Monolithic Insulating joint
Size: 1''-120'',

CL150, CL200, CL300, CL400, CL600, CL900, CL1500, CL2500
Standard: GB150-2011 or ASME B 31.8 or ASME B 31.4/31.3

Installation place: Aboveground or underground

Business Type: Manufacturer

Materials characteristics of  Insulation Flange

Introduction:

The insulating joint (Isolating Joint) is the key component in Cathodic Protection (CP) System. It is mainly used in underground gas transition and distribution system including gas reducing station, each section of the gas transition and distribution pipeline, also the part between gas reducing station and the pipeline, which increase the life of the plant and equipment by reducing or eliminating the electric and chemical corrosion damage.

Specifications:

Ø Suitable for oil, city gas, natural gas, LNG, LPG, etc.

Ø Size:  1” to 120”

Ø Matching pipeline: API 5L Gr. B, X42, X52, X60, X65, X70, etc.

Ø Pressure rating:  ANSI Class 150, Class 300, Class600, Class 900, Class1500, Class2500

Ø Ambient Temperature: -30°C-90°C

Ø Working Temperature: --20°C-120°C

Ø Assembled parts: According to ASTM A694 F52/JB4726:16Mn Ⅱ(pressure grade<6.4MPa)

Ø Short tube: equivalent to that of pipeline

Ø Insulating material: ASTM D709 G11 or GB1301.1-1998 high-strength epoxy glass cloth laminated material

Ø Filling material: high-strength epoxy resin

Ø Sealing material: rubber fluoride

Ø Sealing stickiness: silicon rubber

Ø Surface anti-corrosion insulating material: two-component solvent-free epoxy coating, anti-corrosion thermal contraction bushing

Standard Testing of  Insulation Flange

*  Hydrostatic test: 1.5 times MOP (Max. Operation Pressure).

*  Electrical Resistance:  >= 20Mohm @ 1000v DC under dry air at 25 oC

*  Dielectric voltage:  >= 3.5kv AC 50Hz (1 minute) (Can be 5kv as per request)

Ordering Information:

Please specify the following requirement:

*  Pipeline Diameter, Grade of pipe, the wall thickness of pipe;

*  ANSI rating

*  Medium to be transported in pipeline and temperature of transported medium

*  Additional Testing required except standard testing: X-ray, ultrasonic & magnetic testing, etc.

Service life of insulation flange joint: same as that of the pipeline; Applicable media: oil, gas, water, chemical raw materials, pulp applicable.

Quality requirements for insulation flange joints

Insulation strength: 2500V 50Hz 1 minute no breakdown or arc; Insulation resistance value: DC 1000V resistance value ≥6MΩ; Hydraulic test pressure: 1.5 times the design pressure; Airtight test pressure: equal to the design pressure; Non-destructive testing: According to JB4730-94, all butt joints are tested by 100% ray, and other pressure welds are tested by 100% magnetic particle. Groove: adopt API5L standard.