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Tianjin Haimen Building Materials Co., Ltd

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Marine insulation engineering

NegotiableUpdate on 06/13

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Marine insulation engineering, rubber insulation engineering, outfitting engineering insulation, insulation cotton and stainless steel insulation

Product Details

▲ Insulation Engineering

Insulation engineering is divided into ocean engineering insulation, oil platform insulation, and tank insulation engineering.

The insulation project consists of insulation layer installation and outer protective layer installation. The insulation layer material can be selected from mineral wool products according to insulation or cold insulation needs,

Ship insulation engineering

Silicate products, rubber and plastic products, calcium silicate products, foam glass and other thermal insulation materials; The outer protective layer can be installed using materials such as patterned aluminum sheet, white iron sheet, stainless steel plate, PVC plate, etc. Elbows, tees, and other pipe fittings can be insulated on site, while insulation boxes for valves, flanges, and other fittings can be made for easy inspection, maintenance, and disassembly. The insulation project constructed by Haimen Insulation Engineering Department has reliable quality, beautiful appearance, and strict construction and acceptance in accordance with national and industry standards.

Tank insulation engineering

▲ Anti corrosion and rust removal engineering

Our company has * sandblasting rust removal equipment, which can complete the factory rust removal of steel pipes and on-site sandblasting rust removal of equipment tanks. The rust removal grade shall meet the national standards according to the requirements of the owner.

Sa1 level - equivalent to SSPC-SP7 level in the United States. The use of simple manual brushing and sanding with sandpaper is the lowest level of cleanliness among the four, and the protection of the coating is only slightly better than that of untreated workpieces. The technical standard for Sa1 level treatment: The surface of the workpiece should be free of visible oil stains, grease, residual oxide skin, rust spots, and residual paint and other contaminants. Sa1 level is also known as manual brushing and cleaning level. (or cleaning level)

Sa2 level - equivalent to SSPC-SP6 level in the United States. Using sandblasting cleaning method is the lowest level in sandblasting treatment, which is a general requirement, but the protection of the coating is much higher than manual brushing cleaning. Technical standard for Sa2 level treatment: The surface of the workpiece should be free of visible grease, dirt, oxide scale, rust scale, paint, oxides, corrosive substances, and other foreign substances (except for defects), but defects are limited to no more than 33% per square meter of the surface and may include slight shadows; Minor discoloration caused by defects and rust; Oxidation scale and paint defects. If there are dents on the original surface of the workpiece, slight rust and paint will still remain at the bottom of the dents. Sa2 level is also known as commodity cleaning level (or industrial level).

Sa2.5 level - is a level commonly used in industry and can serve as an acceptance technical requirement and standard. Sa2.5 level is also known as Near White Cleanup level (Near White level or Out White level). The technical standard for Sa2.5 processing is the same as the first half of Sa2 requirements, but the defect is limited to no more than 5% per square meter of surface and may include slight shadows; Minor discoloration caused by defects and rust; Oxidation scale and paint defects.

Sa3 level - equivalent to SSPC-SP5 level in the United States, it is the highest processing level in industry, also known as white cleaning level (or white level). The technical standard for Sa3 level processing is the same as Sa2.5 level, but 5% of shadows, defects, rust, etc. must be present.

Directly buried pipe joint repair

▲ High temperature insulation blanket

The thermal insulation is widely used in the thermal insulation and protection of petrochemical industry, ships and offshore platforms.

High temperature insulation is composed of

High temperature resistant and fire-resistant insulation is made of materials such as three proof cloth or fireproof cloth, which are cut and sewn according to the shape of the insulation part. The outer protective layer is filled with insulation materials such as ceramic fiber cotton or silicate and processed.

Characteristics of high-temperature insulation blanket

Thermal insulation covers are widely used in industries such as oil platforms, ships, and chemicals due to their fire-resistant, waterproof, corrosion-resistant, high-temperature resistant, and easy to disassemble insulation methods. High temperature types can be equipped with stainless steel wire mesh externally, and their maximum temperature resistance can reach over 1200 degrees Celsius.

▲Marine insulation engineering

Polyethylene outer protective pipe polyurethane prefabricated buried insulation pipe has excellent overall performance. The product strictly follows the CJ/T114-2000 (EN253:2009) standard. The working steel pipe adopts the process of shot blasting rust removal on the outer surface and corona treatment on the inner surface of the outer protective pipe to ensure the three in one performance of the insulation pipe. The service life is as long as 30-50 years, with strong stability and extremely low maintenance costs. The insulation effect is 4 to 9 times higher than other insulation pipes, and the heat loss is only 25% of traditional pipes. Under normal circumstances, it can withstand temperatures of 120 ℃, and the highest peak value can reach 150 ℃. Outer protective tube density ≥ 940kg/m ³, tensile strength ≥ 20Mpa; Thermal insulation foam density ≥ 60kg/m ³, compression strength ≥ 300Kpa, thermal conductivity ≤ 0.03w (m.k), closed cell rate ≥ 90%.

Marine insulation engineeringFeatures:

(1) Convenient production and reduced engineering cost

(2) Excellent insulation effect, energy-saving and environmentally friendly

(3) Long service life and low maintenance costs

(4) Easy construction, reducing environmental damage

Marine insulation engineeringStructure:

(1) Working steel pipes: According to the technical requirements of the conveying medium, seamless steel pipes, double-sided submerged arc spiral welded steel pipes are used.

(2) Thermal insulation layer: rigid polyurethane foam.

(3) Protective shell: Made of high-density polyethylene or fiberglass.

(4) Leakage alarm line: When manufacturing high-temperature prefabricated buried insulation pipes, an alarm line is buried in the insulation layer near the steel pipe. Once a leakage occurs in a certain part of the pipeline, the transmission of the alarm line can trigger an alarm on the detection instrument and display the section of the pipe that quickly handles the leakage, ensuring the safe operation of the heating network. The accurate location and degree of leakage of water, in order to notify maintenance personnel quickly

Safety of polyurethane buried insulation pipe

The high-temperature prefabricated buried insulation pipe designed and produced by Tianjin Haimen Building Materials Co., Ltd. can be equipped with a leakage alarm line according to requirements. Once a leakage occurs in a certain part of the pipeline, the accurate location and degree of leakage of the insulation pipe can be displayed on the detection instrument through the transmission of the alarm line, so as to notify the leakage personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating pipe network.

The properties of polyurethane insulation pipes

High temperature prefabricated buried insulation pipes not only have the technical and practical performance of traditional trench and overhead pipeline laying, but also have significant social and economic benefits, and are also powerful measures for heating energy conservation.

▲ Steel sleeve steel steam insulation pipe

Classification of steel insulated pipes with steel sleeves

Prefabricated steam insulation pipes can be divided into two types of structures: internal sliding and external sliding.

Internal sliding buried steam insulation pipe

Internally sliding buried steam insulation pipe, the insulation material and outer protective pipe remain relatively stationary, mainly due to the thermal expansion of the working steel pipe moving within the insulation material. This structure is suitable for hard insulation materials. The advantage is that there is no need to set a support ring between the working steel pipe and the outer protective pipe, and the inner wall of the outer protective pipe is not easily corroded. However, the disadvantage is that it can easily cause eccentricity and crushing of the insulation material.

External sliding steel sleeve steel insulation pipe

The external sliding steel sleeve steel insulation pipe has a sliding surface on the inner surface of the outer protective pipe, and the insulation material moves together with the working steel pipe. This structure is suitable for soft insulation materials, and its advantages are to ensure that heat flow does not leak out, solve the problem of increased friction caused by radial expansion, and have support rings inside, which will not cause eccentricity or crushing of the insulation material. According to the design and requirements, the outer protective layer of the steel insulated pipe can be treated with three-layer PE, epoxy coal tar or fiberglass anti-corrosion technology measures to prevent steel pipe corrosion.

Steel sleeve steel steam insulation pipe structure:

The prefabricated buried insulation pipe consists of several parts, including working steel pipe, calcium silicate, reflective layer, fastening steel strip, sliding bracket, glass wool, air layer, outer protective steel pipe, and wrapped fiberglass.

(1) All inorganic materials, non combustible, and do not decompose toxic gases.

(2) Easy to process, sawing and cutting, convenient on-site construction, and low loss.

(3) The aqueous solution is neutral or weakly alkaline and will not corrode pipelines and equipment.

▲ Polyethylene outer protective pipe

The density of the polyethylene outer protective tube is ≥ 940kg/m ³, the tensile strength is ≥ 20Mpa, the carbon black content is 2.5% ± 0.5% (mass percentage), and the difference in melt flow rate between the two tubes is not more than 0.5g/10min. Cut both ends of the pipe flat, with an angle error of ≤ 2.5 ° perpendicular to the axis.

▲ Directly buried insulation pipe fittings

Directly buried insulation pipe fittings meet the CJ/T 155-2001 standard, and their product scope of application is equivalent to the standard requirements for prefabricated directly buried insulation pipes in CJ/T 114-2000. Insulated pipe fittings include prefabricated insulated elbows, insulated tees, insulated variable diameter pipes, fixed joints, and insulated joints.

▲ Steel sleeve steel insulation pipe fittings

The technical process requirements for steel sleeve steel insulation pipe fittings basically meet the technical requirements for steel sleeve steel insulation pipes. Meets the CJ/T 155-2001 standard, and its product scope of application is equivalent to the standard requirements for prefabricated buried insulation pipes in CJ/T 114-2000.

▲ Fiberglass lined steel insulated pipe fittings

▲ On site patching of buried pipes

The direct buried pipe patching process is divided into wrapping method, hot melt sleeve method, and sleeve method for on-site patching construction. For detailed processes, please refer to the Haimen direct buried pipe patching process flow.

Direct buried pipe joint filling and wrapping method

(1) Take a thermoplastic strip (usually 50mm wide) and place one end parallel to the weld seam, with a width of * on both sides.

(2) Use a welding gun or spray gun to heat the joint between the weld and the thermoplastic tape until the insulation plastic shell begins to melt at the joint with the thermoplastic tape. Then quickly apply pressure to the insulation pipe on the surface of the thermoplastic tape by hand until the adhesive is squeezed out of the thermoplastic tape section. Perform circular operations in sequence until reaching the starting point, and then cut off the thermoplastic tape at a 50mm overlap with the starting point to check the hot melt condition. If there is any loose contact, use a plastic welding gun to heat the surface of the thermoplastic tape and apply pressure by hand until the adhesive is squeezed out.

Hot melt sleeve method for directly buried pipe joint repair

(1) Break off the throw away hot-melt sleeve and wrap it on the insulation pipe jacket at the bare pipe interface. The width of both ends of the jacket and the axial overlap should be more than 50 mm. The section of the outer jacket should be neat. The middle of the overlap with the outer jacket and the lower part of the axial overlap of the sleeve pipe should be insulated with Flat noodles pads. The wiring terminals about 50 mm exposed at both ends of the wire mesh should be fastened with clamps. The cross-section of the outer sheath should be neat, and the joint between the joint and the insulation jacket should be tightly pressed in a circular shape with packing tape. Use a wooden hammer to lightly tap and tighten while tapping, and tightly bond with the plastic on both sides.

(2) Connect the two end wire interfaces of the heating wire mesh to the power output terminal of the electric fusion machine, adjust the fusion machine according to the set fusion time and current, and heat it until the plastic shell of the insulation pipe melts and overflows at the joint with the hot melt sleeve. The fusion machine will automatically power off and the fusion is completed.

Directly buried pipe patching sleeve method

First, move one side of the insulation pipe sleeve to the welded bare pipe position, and the overlap length with the insulation outer pipes at both ends should be greater than 50 mm. 2) Use a plastic welding gun to weld the cross-section of the sleeve at both ends and the insulation pipe shell in a circular shape, and it is qualified if the welding rod cannot be torn off.

Directly buried steam insulation pipe joint repair

1. The structure at the interface of steam buried insulation pipes should be the same as that of the straight pipe section of the pipeline network.

2. The laying of insulation layers is of composite type, among which the main insulation layer can be divided into high temperature and ordinary types according to the model. The joint ends are all equipped with staggered joints. Before placement, the filling material of the staggered joints should be removed and placed in layers. The wrapping should be smooth and full, tightly tied with packing tape, and covered with an aluminum foil anti heat layer.

3. When the outer sheath of the insulation pipe is a steel jacket, the outer pipe interface needs to be welded. After covering the insulation material, the outer steel jacket is cut into two semi-circular tiles, and the groove is welded firmly to the outer steel jacket of the straight pipe section.

4. Remove welding slag, welding flux coating, and burnt anti-corrosion residue on the outer steel sleeve of the insulation pipe. Perform external anti-corrosion treatment on the interface and welds according to the anti-corrosion requirements of the steel sleeve outside the buried pipe.

5. Keep records of concealed works.

▲ Rock wool products

Rock wool products are mainly made of basalt as the main raw material. After being melted in a high-temperature furnace, they are made into inorganic fibers by high-speed centrifugal equipment, and mixed with a certain proportion of binders, dust-proof oil, and silicone oil to finally produce different products such as rock wool boards and rock wool pipes. Rock wool products have a wide range of applications, including insulation for various high-temperature pipelines, tanks, equipment, ships, and walls in industries such as petroleum, chemical, and metallurgy. They also have excellent sound absorption effects. The bulk density is 60-150kg/m ³, the average fiber diameter is ≤ 7 μ m, the slag ball content is ≤ 12%, the thermal conductivity is ≤ 0.044w/m.k, and the maximum operating temperature is 650 ℃.

(1) Thermal insulation performance: Good thermal insulation performance is a basic characteristic of rock wool and slag wool products. At room temperature (around 25 ℃), their thermal conductivity is usually between 0.03 and 0.047W/(moK).

(2) Combustion performance: The combustion performance of rock wool and slag wool products depends on the amount of combustible adhesive in them. Rock wool and slag wool are inorganic silicate fibers that are non combustible. In the process of processing them into products, organic binders or additives are sometimes added, which can have a certain impact on the combustion performance of the products.

(3) Sound insulation performance: Rock wool and slag wool products have excellent sound insulation and absorption performance. Their sound absorption mechanism is that these products have a porous structure. When sound waves pass through, friction is generated due to flow resistance, which causes a part of the sound energy to be absorbed by the fibers, hindering the transmission of sound waves.

▲ Glass wool products

Glass wool belongs to a category of glass fibers and is an artificial inorganic fiber. Using natural minerals such as quartz sand, limestone, and dolomite as the main raw materials, combined with some chemical raw materials such as soda ash and borax to melt into glass, blown and spun into fine fibers, with three-dimensional intersections between fibers, thus having excellent insulation and sound insulation properties. Glass wool products are widely used for insulation, sound absorption, and noise reduction in fields such as construction, petrochemicals, electricity, metallurgy, as well as insulation and cooling for industrial and civilian heating. The bulk density is 24-100kg/m ³, the average fiber diameter is ≤ 8 μ m, the slag ball content is ≤ 10%, the thermal conductivity is ≤ 0.042w/m. k, and the maximum operating temperature is 450 ℃.

▲ Ceramic cotton products

Ceramic cotton products are made by melting high-quality gemstones in an electric furnace above 2000 ℃, spraying them into fibers, and uniformly adding special binders, oil repellents, and water repellents through heating and solidification. Widely used for pipeline and equipment insulation in industrial sectors such as thermal power, petrochemicals, ships, military industry, construction, machinery, air conditioning, and refrigeration, it has excellent performance in insulation, fire prevention, moisture prevention, corrosion prevention, and sound absorption. The bulk density is 100-200kg/m ³, the average fiber diameter is ≤ 3 μ m, the slag ball content is ≤ 10.2%, the thermal conductivity is ≤ 0.035w/m.k, and the maximum operating temperature is 1000 ℃.

▲ Rubber sponge

Rubber and plastic insulation materials are mainly made of high-performance nitrile rubber and polyvinyl chloride, combined with various high-quality auxiliary materials, and foamed through special processes to form soft high-end insulation materials. This product is made of closed cell elastic material, which has excellent properties such as softness, bending resistance, cold resistance, heat resistance, flame retardancy, waterproofing, low thermal conductivity, shock absorption, and sound absorption. Widely used in industries such as central air conditioning, construction, chemical, pharmaceutical, textile, metallurgy, shipbuilding, vehicles, and electrical appliances. The apparent density is ≤ 95kg/m ³, the thermal conductivity is ≤ 0.031w/(m.k), the vacuum water absorption rate is ≤ 10%, and the tear strength is ≥ 2.5n/cm.