JY series insulation joint
Definition
The insulation joint is a general designation of the pipeline joint with the sealing performance, strength property and electrical corrosion resistance required by the buried steel pipeline at the same time. It contains a combination of parts, insulation board, packing, sealing ring and tube etc.. It is an alternative to insulated flange.
Structure characteristics
The insulating joint adopts the whole extrusion welding form, and the bolt and the flange connection type are not adopted. The insulating joint of the insulation and sealing materials into and fixed to the sleeve (assembly) in the form of. After the insulation joint is assembled, the internal element should be fixed to the corresponding position. In the soil pressure, the provisions of the pressure of the pipeline operation and the plant or the field under water pressure test, the entire insulation joint to remain intact. The sealing element of the insulation joint is close to the insulation board in the interior of the joint, and the sealing element has a permanent elasticity, and the two sides of the sealing element are directly contacted with the exposed metal surface, and the tightness of the joint is ensured.
Product features
Insulation performance: 2500V shaking table test of insulation resistance is more than 200M, the breakdown voltage is greater than or equal to 3KV.
Long life: with the pipeline life, such as strength.
High strength: pressure test more than 1.5PN (pressure).
Use temperature: -30 degrees C - +90.
Applicable medium: oil, gas, water, chemical raw materials, coal slurry, etc..
Material characteristics:
The material you are using to meet the following requirements:
Insulation material: high strength epoxy resin and glass fiber laminated material: D709 G11 ASTM.
The bending strength of longitudinal and transverse: above 390MPa = 290MPa;
The tensile strength is more than 340MPa, lateral longitudinal: more than 240MPa;
The compressive strength is not less than 340MPa;
Absorbent: less than 30mg;
After immersion in water resistance than 5*108.
The breakdown voltage of more than 3.0KV
Combination steel body: 16Mn, JB4726, A694 F52 ASTM, F60
Short: No. 20, 16Mn, GB8163-99;
X70, X65, X56, X52, X46, SPEC.5L API.
Sealing material: O - shaped or U - shaped sealing ring: fluorine rubber, butadiene rubber butadiene rubber, in accordance with D2000 ASTM.
Filling material: cold curing resin;
Insulating coatings; imported liquid epoxy resin;
Anticorrosion material: heat shrinkable anticorrosion material;
Installation requirements:
The 1 insulating joint located within 50 meters, to avoid welding die.
2 insulation joint is connected to the pipe, not in the joint lift pipe within 5 meters.
3 insulation joint and pipeline pressure test.
4 insulation joint and pipeline connection, should be required to repair the mouth, corrosion proof operation is not allowed to make the surface temperature of the insulation joint is higher than 120.
5 insulation joints can be installed in the underground straight pipe section.
6 insulation joints should be installed in the ground when the installation of 20 meters away from the elbow on the paragraph and set the bracket.
7 insulation joint is avoided to install on the vertical tube.
8 buried installation should avoid the installation in the perennial water