High Temperature Air Flue Gas Ducts Non Metallic Expansion Joints Fluorine Rubber Skin For Desulfurization

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

• 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

• Non-metallic compensators/expansion joint types

Non-metallic compensators come in various types, including:

Straight cylindrical non-metallic expansion joints
Compound non-metallic expansion joints
Angular non-metallic expansion joints
Square non-metallic expansion joints

Rectangular non-metallic compensators are primarily utilized in power plant flue ducts to absorb thermal displacement and/or shock absorption. They can be connected using either flange connection or nozzle connection methods.

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

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

• 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, also known as fiber fabric compensators or expansion joints, offer the following features:

Purpose: They compensate for axial and angular displacement, providing attributes such as no thrust, simplified support design, corrosion resistance, high temperature resistance, noise reduction, and vibration isolation. This makes them well-suited for hot air ducts and flue ducts.

Circular Non-Metallic Compensators/Expansion Joints Parameter Table: