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High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts
High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts
High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts
High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts
Specifications
Brand Name :
HNEENERGY
Model Number :
Rectangular Non-metallic
Certification :
ASME, ANSI, DIN, JIS,ISO etc.
Place of Origin :
China
MOQ :
1
Payment Terms :
L/C, T/T, Western Union, MoneyGram
Supply Ability :
30000 Pieces per Month
Delivery Time :
7-30 days
Packaging Details :
wooden case or pallet or as per customers' requirement
Customized support :
OEM, ODM
Connection :
Welding
Material :
steel, Fiber fabrics, silicone rubber cloth, fluororubber cloth, PTFE film, PTFE cloth, ceramic cloth, etc
Application :
Hot air exhaust, dust removal pipeline etc
Type :
Axial type
Description

1. Expansion joints(compensators)

  • Introduction

Expansion joints are commonly referred to as compensators. They consist of one or more bellows (an elastic component) as the main working body, as well as connectors at both ends, supports, flanges, conduits, and other accessories. Expansion joints are a flexible structures installed on vessel shells or pipelines to compensate for additional stresses caused by temperature differences and mechanical vibrations. By utilizing the effective expansion and contraction of the bellows, they compensate dimensional changes in pipelines, conduits, vessels and so on, which are caused by thermal expansion and contraction, or compensate for axial, lateral, and angular displacements of pipelines, conduits, vessels, etc. They can also be used for noise and vibration reduction and heating supply systems. In order to prevent deformation or damage to heating pipelines caused by thermal expansion or temperature stress when the heating pipelines are heated, compensators need to be installed on the pipelines to compensate for thermal expansion of the pipelines, thereby reducing the stress on the pipeline walls and the forces exerting on valves or support structures.

As expansion joints are elastic compensating components capable of free expansion and contraction, they have the advantages of reliable operation, good performance, and compact structure,and others.Hence they are widely used in departments such as chemical engineering, metallurgy,nuclear energy,and the like. There are various forms of expansion joints used on vessels, with the U-shaped expansion joint being the most widely used in terms of the shape of bellows, followed by Ω-shaped and C-shaped joints. As for expansion joints used on pipelines, they are classified according to structural compensation into universal expansion joint, pressure balanced expansion joint, hinged expansion joint, and gimbal expansion joint.

  • Classification

Main Item Classification Description

Metal Expansion Joint

Elbow Expansion Joint

Bend the pipe into a U-shaped or other shape, also known as tension bends,are a type of expansion joint that utilizes the elastic deformation ability of the form to compensate. Its advantages are good strength, long service life, and on-site production.The disadvantages are space-consuming, high steel consumption, and high friction resistance. This type of expansion joint is widely used in various steam piping and long pipes.

Bellows Expansion Joint

A bellows expansion joint, crafted from metal bellows, enables axial expansion and contraction along the pipeline and permits slight bending. To prevent overextension, protective rods or rings are installed at each end, with guide supports on connected pipelines. Angular and lateral joints address rotational and lateral pipeline deformations. While offering space and material savings, standardization, and mass production benefits, they have a shorter lifespan. Primarily used in short, low-temperature, and pressure pipelines, advancements in production technology are broadening their applications, now supporting pressures up to 6.0 MPa.

Slip-Type Expansion Joint

The slip-type expansion joint features inner and outer sleeves that move axially. Sealed with a stuffing box, it maintains pipe alignment while compensating for axial expansion and rotation. With small dimensions and high compensation capacity, it suits hot water, steam, and grease applications. Thermal expansion is addressed by sliding the inner sleeve against the outer one. Equipped with a high-performance self-sealing dynamic seal, it accommodates pipeline movement while meeting sealing requirements. A specialized synthetic seal withstands high temperatures, corrosion, and aging, functioning in temperatures from -40 to 150 degrees Celsius, and up to 350 degrees Celsius in special cases. This design ensures axial movement while preventing medium leakage.

Non-metallic Expansion Joint

Rubber Expansion Joint

Composed of rubber and rubber-fiber composite materials, steel flanges, sleeves, and insulation materials, it is mainly used for flexible connections between various fans and ducts. Its functions include shock absorption, noise reduction, sealing, medium resistance, easy displacement and installation. It is an ideal accessory for shock absorption, noise reduction, smoke and dust removal in the field of environmental protection.

Fabric Expansion Joint

The fabric expansion joint is mainly made of fiber fabric, rubber, and other high temperature resistant materials. It can compensate for the vibration and deformation of fans and ducts.Fabric expansion joints can compensate for axial, lateral, and angular products, with features such as no thrust, simplified support design, corrosion resistance, high temperature resistance, noise reduction, vibration reduction,and others.It is particularly suitable for hot blast pipes and smoke and dust pipeline of power plant.The non-metallic compensator's fiber fabric and insulation cotton itself have the functions of sound absorption and vibration isolation, therefore they can effectively reducing the noise and vibration of boiler, fan, and other systems. Simple structure, light weight, and easy maintenance.

  • Special materials

Super Austenitic Stainless Steel:254SMO,904L,AL6XN

Duplex Stainless Steel :2205 Dual phase steel (S31803)

Nickel Based Alloy Steel:INCOLOY800/800H/800HT/840/825,INCONEL600/601/690/625/X-750

Hastelloy Alloy C-276/C-22/X,MONEL400/K500

Pure Nickel:N4,N6(Ni200,Ni201)

Titanium Plate For Stamping:GR1,GR2,TA1,TA2

Austenitic Stainless Steel:SUS304,SUS304L,SUS316,SUS316L,SUS310S,SUS321,SUS316Ti

2. Non-metallic Expansion joints

Types and Applications of Non-Metallic Compensators:

Non-metallic compensators, crucial components in various industrial settings, can be broadly categorized into four types: straight cylindrical, compound, angular, and square non-metallic expansion joints.

Straight Cylindrical Non-Metallic Expansion Joints offer a simple yet effective solution for absorbing thermal displacement and reducing stress in piping systems.

Compound Non-Metallic Expansion Joints are designed to handle more complex displacement patterns, often found in curved or irregularly shaped pipelines.

Angular Non-Metallic Expansion Joints are specifically engineered to accommodate angular movements, making them ideal for applications where piping systems experience changes in direction.

Square Non-Metallic Expansion Joints are suitable for square-shaped ducts and piping, providing efficient thermal displacement compensation.

Among these types, Rectangular Non-Metallic Compensators play a vital role in power plant flue ducts. Their primary function is to absorb thermal displacement and/or shock absorption, ensuring smooth and efficient operation of the flue system. Rectangular compensators come in various connection types, including flange connections and nozzle connections, allowing for flexibility in installation and integration into existing systems.

  • Common structural types of non-metallic compensators (non-metallic expansion joints) include the following six:

High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts

  • Technical parameters of non-metallic compensators (non-metallic expansion joints):

Compensating segment length(h/m)

 100 200 250 300 350 400 450 500 550 600 650 700 800 900

Compensation volume(nm)

Axial displacement (x/m)

 -30 -50 -75 -85 -105 -125 -130 -140 -165 -175 -195 -205 -225 -240
+15 +20 +30 +36 +45 +45 +50 +55 +58 +62 +66 +70 +74 +80

Lateral displacement (y/m)

 ±10 ±15 ±25 ±30 ±45 ±50 ±60 ±68 ±7o ±73 ±75 ±80 ±85 ±90

Working Temperature (t°C)

 a=100-200,b=200-300,c=300-450,d=450-500,e=500-600,f=600-700,g=700-1000

Working pressure P(Kpa)

±10~±300,if the user requires, the pressure beyond the range, can be designed separately.

Flow rate

 a——b v=8——15
c——d v=8——20

  • Applied range of non-metallic compensators (non-metallic expansion joints):

Gas turbine exhaust duct

Desulfurization system

Flue ducts and exhaust systems of various industries

Coal-fired boilers, circulating sulfurized bed boilers

Flue ducts of waste heat boilers

3. Fiber fabric compensators / expansion joints

Fabric compensators (fiber fabric compensators)/expansion joints have the following features:

Purpose: They can compensate for axial and angular displacement, with characteristics such as no thrust, simplified support design, corrosion resistance, high temperature resistance, noise reduction, and vibration isolation, making them particularly suitable for hot air ducts and flue ducts.

Parameters table for circular non-metallic compensators/expansion joints:

Circular product specifications

 Dw D1 D2 D3 b d

Number of bolt holes(n)

mm
Φ108 108 200 164 110 10 14 4
Φ159 159 251 215 161 8
Φ219 219 311 275 221
Φ273 273 365 330 275 12
Φ325 325 427 385 327
Φ377 377 479 435 379
Φ426 426 528 490 428
Φ480 480 595 540 483 12 18
Φ530 530 645 600 533
Φ630 630 745 700 633
Φ720 720 843 800 723 16
Φ820 820 943 900 823 20
Φ920 920 1043 1000 923
Φ1020 1020 1153 1100 1023 14 22
Φ1120 1120 1253 1200 t123
Φ1220 1220 1353 1300 1223
Φ1320 1320 1453 1400 1323 24
Φ1420 1420 1553 1500 1423 16 28
Φ1820 1820 1963 1910 1823 26
Φ2020 2020 2163 2110 2023 32
Φ2220 2220 2363 2310 2223 18 36
Φ2420 2420 2563 2510 2423 40
Φ2820 2820 2983 2915 2823 20 32 44
Φ3220 3220 3383 3315 3223 22 52
Φ3620 3620 3783 3715 3623 56

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High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts

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Product Detail
Brand Name :
HNEENERGY
Model Number :
Rectangular Non-metallic
Certification :
ASME, ANSI, DIN, JIS,ISO etc.
Place of Origin :
China
MOQ :
1
Payment Terms :
L/C, T/T, Western Union, MoneyGram
Contact Supplier
High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts
High Temperature Resistant Rectangularnon Metal Expansion Joint For Flue And Air Ducts

Beijing Hownew Energy Technology Group Co., Ltd

Verified Supplier
2 Years
beijing, beijing
Since 2018
Business Type :
Manufacturer, Agent, Importer, Exporter, Trading Company
Main Products :
Carbon steel Pipe fittings, Stainless steel Pipe fittings, Alloy steel Pipe fittings
Total Annual :
15000000-18000000
Employee Number :
70~100
Certification Level :
Verified Supplier
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