Hebei Lufeng Piping Equipment Co., Ltd. supplies quality products which help solve most flange sealing and insulation problems. Our insulation kits are typically used on offshore installations, seawater environments, chemical installations, oil refinery pipelines where the flange need to be properly to prevent leakage and also must be catholically insulated.Our insulation kits are following standards ANSI 16.5 & API 605，other standards need to provide more specifications according to our requirements.
Insulation gaskets may be specified as “E” and “F” type while single, double or one – piece sleeve and washer sets are offered as options for varying degrees of electrical insulation between the flanges. In addition, a wide variety of material options exist for both insulation gaskets and sleeve and washer materials. The G10 retainer and Mylar sleeve are recommended when the conditions allowed.
In order to prevent the loss of protected current and interferent unprotected metal pipes and equipment , We use flange insulation kits in the import and export of pumping stations and oil depots, avoid the cathodic protection current into the trunk. Flange Insulation kits can also be used underground as well as different lots of stray current line (different material, old and new pipelines, etc.) connections, as an anti-corrosion measures.
Where need flange insulation gaskets?
- Import and export of stations at start and end of protected pipelines.
- Import and export of stations at the middle of protected pipelines. However, to ensure the continuity of condutive pipe at the both sides of the stations, the pipes outside of the flanges should be connected by cable.
- In the ends of pipe which across the protected current assumped pipes
- The connections of the protected pipes and should not be cathodic protected
- Stray current interference zone
- Dissimilar metals, old and new pipeline connections; the bare and coated pipe connections connections.
- Location using electrical ground
The parts of an insulation gasket
General have an insulation gasket
Some insulation sleeves
Some insulation washers and meral washers
All these parts are designed according the flange sizes
Can be installed without change the flange
Leatou will packed all the parts together
Avoid the loss during the transportation and installationHow to order?
Please provide the following information when ordering
Flange type and standard
Working temperature,pressure and media
Insulation sleeve material
Washer materialHow to install?
1.Open box and check all the parts available.
2.Check the joint faces are clean and free from indentations and scoring, the joint surface finish should between 3.2um to 6.3um.
3.Align the flanges, ensure that the flanges coaxial. Insert the gasket parallel and carefully. Do not use jointing compounds, grease or lubricants with our gasket materials. These compounds can affect the friction between the gasket and the flange and can lead to premature joint failure.
4.Bolting. Apply bolt lubricant to the bolt and nut threads and to the face of the nut to be tightened, assembly the steel washer, insulation washer and insulation sleeve to the bolts by turn (make sure the steel washer always close to the nut) and insert into the bolt holes, put insulation washer, steel washer and nut one the another side of bolts.
5.Tighten all the bolts until the flange meet the gasket.
6.Check the distance between flanges to make sure the it’s parallel
7.Tighten to 30% of the suggested load
8.Tighten to 60% of the suggested load.
9.Tighten to full suggested load. (Too much load will damage the gasket)