External sliding type steam direct buried insulation pipe

Product introduction

The steel sleeve steel composite steam prefabricated direct buried thermal insulation tube produced by the company adopts ultra-fine high temperature resistant centrifugal glass wool material, multi-layer radiation shielding and full sliding roller bracket structure, in addition to shock absorption, further improve the thermal resistance, reduce or Prevent heat flow leakage loss; the outer anti-corrosion layer is made of epoxy coal tar paint plus glass cloth or three-dimensional glass steel winding anti-corrosion method. The adhesion between the anti-corrosion layer and the metal outer protective steel tube is enhanced, so that the anti-corrosion reliability and the service life are improved; and the outer surface temperature of the directly buried pipeline is ensured to be ≤50 °C. It is used to transport steam pipes with a pressure of 2.5Mpa and a temperature of 380°C or less.

Second, the product structure form:

Prefabricated direct-buried steel sleeve steel steam insulation pipe (outer sliding) product structure form: 1, working steel pipe 2, aluminum foil reflective layer 3, glass wool thermal insulation layer 4, aluminum foil reflective cloth, 5, stainless steel fastening tape, 6, Sliding guide bracket, 7, outer protective steel tube 8, epoxy coal tar paint plus glass cloth or three-dimensional glass steel winding anti-corrosion. The structure is as follows:

Third, product features:

◆Under 350°C, centrifugal glass wool is an excellent thermal insulation material with light weight and stable geometric shape.

Wrapped with multiple layers of staggered seams, effectively reducing heat loss, while controlling the surface of the jacket to prevent the production of cold bridges

Raw, so that the temperature control of the jacket anti-corrosion layer is guaranteed. And have physical properties after drying with water and a few

What shape can be fully recovered. This feature allows the pipeline to adapt to the construction strips in high water table areas

It will bring great convenience to construction and reduce construction costs.

◆Using the characteristics of high strength and good sealing of steel casing, it has successfully solved the difficulty of waterproof and leakage. Steel

The tube is made of an outer protective layer and has the characteristics of high strength, not easy to be damaged and can withstand the upper load of the snare, in order to achieve long

Life expectancy, steel outer casing needs to be treated with anti-corrosion treatment to ensure the safety of heating pipes, which can be at different temperatures.

A safer and more widely used environment, especially for high temperature steam pipeline projects.

◆Sliding brackets and internal fixings in steam pipes are made of special materials to prevent heat bridges from being produced.

Raw, so that the temperature control of the jacket anti-corrosion layer is guaranteed.

◆The anti-corrosion of the outer steel tube is made of epoxy coal tarpaulin plus glass cloth or three-dimensional glass steel winding anti-corrosion method. When multiple layers are wound, the layers are staggered and compacted. The anti-corrosion primer is applied to the non-wound portion at both ends of the pipe. The anti-corrosion life can be greatly increased. Hydrophobic system

Fully enclosed form, flexible layout, reasonable structure, safe and reliable.

◆ The tidal tube on the steel casing can remove the humid gas in time and can be used as the alarm signal tube for daily operation.

◆The thermal compensation of the pipeline is made of high quality bellows compensator and installed in the casing to form a direct buried form.

There is no need to set observation wells, the construction operation is convenient and the construction period is short.

Fourth, technical requirements:

Executive Standard: CJ/T200-2004 "Technical Conditions for Prefabricated Direct Buried Steam Insulation Pipes for Urban Heating"

Transport medium: steam

Working pressure: ≤2.5MPa

Medium temperature: ≤350°C

Working environment: underground soil

V. Product technical description:

1, work, outer protective steel pipe

The outer protective tube adopts spiral seam submerged arc welded steel pipe conforming to GB/T9711.1, and the corrosion grade is A and B grade.

The hydraulic pressure test of 0.6 MPa is carried out 100%, and steel pipes of other materials can also be used according to customer requirements.

2, insulation layer

The insulation material is made of glass wool insulation and aluminum foil reflective layer, and other materials of insulation materials can also be selected according to customer requirements. The double-layered staggered insulation material of the thermal insulation material is bundled on the working steel pipe to reduce the heat loss, and no surface friction occurs with the steel casing, which prolongs the service life of the thermal insulation layer, and the thickness thereof depends on the medium temperature.

density:

≥48kg/m3

Maximum working temperature (°C)

454

Average fiber diameter:

≤8μm

Corrosive:

no

Water content:

≤1%

Thermal conductivity (W/m.k):

K=0.0235+0.0002t

Non-combustible:

Class A

Implementation standards:

GB13350

3. The rolling guide tube susceptor is composed of a clamp bracket and a high temperature resistant heat insulating material, which is clamped on the Dinggong steel pipe and erected in the outer casing to form a free rolling system. Hoop material: Q235 or stainless steel belt (Sus304) high temperature and high strength insulation material: compressive strength 1.2MPa, thermal conductivity 0.17W / m. k.

Sliding guide bracket

4. The fixed bracket fixing bracket is built-in, and the tensile strength of the steel pipe is used to offset the thermal expansion thrust of the pipeline.

There is no need to hit the ground anchor, no need for an axial bellows compensator on the outer protective tube, saving investment and safe operation.

5, anti-corrosion layer

The anti-corrosion of the outer surface of the outer casing is made of three-dimensional fiberglass winding anticorrosion.

Shandong Yitong Energy Saving Co., Ltd. is a professional manufacturer of polyurethane prefabricated direct buried and empty rack pipes integrating scientific research, development, manufacture and sales. The company has passed ISO9001 quality system certification, IS014001 environmental system certification, OHSAS18001 occupational and health safety management system certification, production license, quality supervision and inspection certificate. The company's products have repeatedly passed the quality inspection and testing of the department through the national authority and the corresponding test report. The factory covers an area of 55,000 square meters, with 3 high-density polyethylene outer tube production lines, 2 sets of automatic plastic sleeve insulation production lines, 5 sets of high and low foaming machines and on-site foaming machines, and a specialized steel pipe anti-corrosion production line. One production line, one set of steel pipe shot blasting equipment. Shandong Yitong Energy Saving Co., Ltd. always adheres to scientific and technological innovation and develops polyurethane prefabricated direct buried insulation pipes that meet industry standards or exceed industry standards. The product has good waterproof, shockproof, anti-pressure, heat insulation, corrosion resistance, convenient construction and long service life. It is widely used in heating, fire, chemical, electric power, oil transportation, water delivery, and has a service life of up to 30 years.