"Contact: Li Chunpeng Tel: QQ:1327077391 13930752103" is also referred to as the insulating joint with pipe insulation joint of buried steel pipeline requirements of the sealing performance, strength properties and electrical corrosion protection required by the. It contains assembly, insulation board, packing, sealing ring, short tube and so on. The insulation joint is improved according to the replacement of insulating flange problems in use, the pressure is an important essential element of cathodic protection system of steel pipe in the cathodic protection system is widely used in steel pipe.
Insulated joint
Two, technical parameters
Size: DN5 ~ DN600;
Pressure grade: PN40Mpa: service life: same as pipe line; applicable medium: oil, gas, water, chemical raw material, pulp.
Three. Quality requirements for editing insulation strength:
2500V 50Hz minutes without breakdown or arcing; insulation resistance: 000V DC resistance than 6M ohm; test pressure:.5 times of the design pressure; air tightness test pressure: equivalent design pressure; nondestructive testing: according to JB4730-94 all the butt joint of 100% radiographic inspection, the other 100% magnetic particle bearing weld groove: the API5L standard.
Four 、 classify and edit rail insulation joint
A kind of high strength rail insulation joint is connected in the two rail end placed rail end insulation, slot type insulation board is clamped on both sides of the joint, two pieces of reinforced cover plate is installed in the groove of the insulating plate, and then use the high strength bolt joint and tighten the penetration holes. The first insulating plate mesh glass cloth groove type insulation board, the first, three, five, seven for the paste insulation adhesive, second, the six layer is the fourth layer of glass mesh cloth, thick glass cloth; second kinds of insulation board is electric heating plate groove type insulation board, the first, three, five. The seven layer is the insulating film second, six layers of glass cloth, the fourth layer is the heating plate with a hole.
Five. Structure and principle
The integral insulation joint consists of the following parts: upper and lower tubes, sleeves, insulation, seals and insulating coatings. An insulating member and a seal are clamped between the upper end of the insulating joint and the lower end of the lower pipe to form a double sealing structure with insulating property. The sleeve adopts the welding and welding or catheter directed two forms, insulating parts and the upper and lower sealing tube firmly wrapped inside, forming a "sealed container", which not only ensures good insulating performance, but also greatly improve the bearing capacity of the insulation structure. The installation requirements of insulating joint installation at 50 meters, to avoid welding die