bellow expansion joint: 1.Packaging Detail: Each joint in carton box, then into plywood case,Plywood cases suitable for sea transportation. 2.Wooden box size:one meter long high width 3.Wooden box reproduced quantity:50sets 4. Settlement way:Advance deposit payment prior to delivery of the goods production, the one-time payment.Or collected by the logistics company. More packing details please visit the HENGZHONG website!
Normal delivery:7-15days.Spot goods delivery:7days.
bellow expansion joint:
3.Product form:Wave forms
Resistance to high temperature corrosion metal bellow expansion joint
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1. Product Specification
Bellows , it is customary also called expansion joints, or expansion joints . Constitute a body of work by a bellows ( an elastic element ) and end tube , brackets, flanges, pipe and other accessories .
bellow expansion jointClassification Disposable bellows compensator U -shaped metal expansion joint bellows compensator dimensional pulverized dedicated bellows hinge bellows (JJL type ) curved pipe pressure balanced bellows Ball type stainless steel bellows QB so .
bellow expansion joint Works Bellows bellows are used to take advantage of the effective elastic element stretching deformation to absorb pipelines, conduits or containers such as those caused by the expansion and contraction of the dimensional changes of a compensation device , is a form of compensation components. Available for axial, lateral and angular displacement of the absorption.
bellow expansion joint Standard bellows bellow expansion joint Standard Number : GB / T 12777-2008
bellow expansion joint Standard Name: Metal bellows expansion joints General
2008-08-04 release ,2009 -02-01 implementation
Promulgated Department: Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Management Committee
Introduction bellow expansion joint This standard specifies the metal bellows compensator pattern definition, classification , requirements, test methods, inspection rules, marking and packaging , transportation, storage and so on. This standard applies to installation in the pipeline for the whole of its flexible member formed unreinforced U -shaped, U-shaped and strengthened ∩ -shaped circular bellows bellows compensator design, manufacture and testing. Expansion joints for pressure vessels designed, manufactured and tested also refer to the use .
Bellows connection is divided into two kinds of flange connections and soldering . Buried pipeline compensation commonly used welding ( except trench installation )
Thermal deformation pipeline
x pipeline expansion amount
a is the linear expansion coefficient, 0.0133mm / m
L compensation pipeline ( pipeline compensation required distance between the fixed bearing ) length
T is the temperature difference ( medium temperature - installation ambient temperature )
Installation and use requirements compensator
1 , the compensator check before the installation of its type, size and piping configuration must meet the design requirements.
2, with the inner sleeve of the compensator should be noted that the inner sleeve to a direction consistent with the medium flow direction , a hinge -type hinge compensator and displacement plane of rotation of the rotational plane should be the same.
3 , the need for "cold tight" compensation, pre-deformation of the auxiliary components in the pipeline should be removed after installation .
4 , is strictly prohibited bellows deformation method to adjust the piping installation tolerance, so as not to affect the normal function of the compensator , reducing the service life and increase the piping , equipment, load bearing components .
5 , the installation process , welding slag splashing allowed to wave shell surface , the shell does not allow wave by other mechanical damage.
6 , piping installed , it should be removed as soon as the installation on the bellows transportation yellow secondary positioning member and fasteners , according to the design requirements to limit device transferred specified location, the pipe system under ambient conditions have adequate compensation capability.
7 , the compensation components of all activities shall be stuck or external component limit their scope of activities , should ensure the normal operation of the moving parts .
8 , hydrostatic testing , the pipeline deal with compensation fixed end of the second tube frame reinforcement , so do not move or rotate the pipe . For compensation for the gas medium and its connecting piping , pay attention to whether the need for additional water-filled temporary support .
10 , and compensation bellows contact insulation materials should not contain chlorine .
Bellows compensator bellows which is based on the scrambling of the core member , the pipeline can be used for axial, lateral and angular compensation of the three directions . Axial compensator to reduce the phenomenon of self-excited media , with inner sleeve inside the product , greatly limits the radial compensation capability , it is generally only used to absorb or compensate for axial displacement of the pipe ( if piping in a small amount of radial displacement really necessary , but also can absorb axial and angular displacement in three directions , and any combination thereof; hinge compensator ( also known as angular compensator ) , which with two or three compensators supporting the use of ( hinge compensator used individually without compensation capability) , to absorb the transverse single-plane deformation ; universal hinge ( angle ) compensator, supporting the use of two or three , to absorb the deformation of three-dimensional direction .
Non-metallic flexible compensator
Non-metallic flexible compensator : also known as non-metallic expansion joint , non-metallic fabric compensator can compensate for axial, lateral , angular , with no thrust bearing design simplification , corrosion resistance , high temperature , noise damping characteristics , especially suitable for hot pipes and pipe smoke .
Non-metallic flexible compensator connection
1 , flange connection
2 , take over the connection
The characteristics of non-metallic flexible compensator
1 , compensate for thermal expansion : the direction can be compensated more , much better than only a single metal compensator compensator .
2 , the compensation installation error : As pipe connections , the system then the inevitable errors , better compensation fiber compensator installation errors.
3 , muffler vibration : fabric , cotton insulation body itself has a sound absorption, vibration isolation transfer function , which can effectively reduce the boiler , fans and other system noise and vibration.
4, no reverse thrust : As the main material for the fabric , inability to pass . Fiber compensator simplifies design, to avoid the use of large bearings, save a lot of materials and labor .
5 , good high temperature resistance, corrosion resistance : use of fluorine plastic , silicone material has good resistance to high temperature and corrosion resistance .
6 , good sealing performance : a relatively complete production assembly systems, fiber compensator ensures no leakage .
8 , the price is lower than the metal compensator, quality is better than imported products.
Stainless steel compensator
Stainless steel compensator type
1 , straight type 2 , duplex 3 , angle type 4 , square
Stainless steel compensator can compensate for axial, lateral , angular , with no thrust bearing design simplification , corrosion resistance , high temperature , noise damping characteristics, especially suitable for hot air ducts and smoke pipes.
The reliability of the metal bellows is by design , manufacture , installation and operation management and other aspects of composition. Reliability should also be considered from several aspects . Material selection used for heating pipe network bellows selection, should be considered in addition to the working medium , the working temperature and the external environment , we must also consider the possibility of stress corrosion , water treatment agent , and pipe cleaners on materials , etc. and on this basis, combined bellows materials, welding, molding , and material cost performance , preferably a corrugated tube production economical and practical material .
Under normal circumstances , the choice of the bellows material shall meet the following conditions:
( 1 ) high elastic limit, tensile strength and fatigue strength, to ensure the bellows work.
( 2 ) good plasticity, easy bellows forming, and can by a subsequent treatment process ( work hardening , heat treatment, etc. ) to obtain a sufficient hardness and strength .
( 3 ) good corrosion resistance, bellows meet work requirements in different environments .
( 4 ) good weldability , the bellows in the production process to meet the requirements of the welding process .
2. metal bellow expansion joint Production process
one automatic longitudinal seam welder for S.S Sheet of DN400 bellow which is the largest in the country, one automatic and hydraulic forming machine for DN400 circular corrugations, 35 sets of various-size advanced hose production lines, a country’s largest braiding machine of 128 spindle and 28 other braiding machines, an independent pressure test room for metal hoses. We can supply different diameter metal hoses from DN6~DN800 to meet all your requirements.
3. metal bellow expansion joint Application Range
Refineries • Power Plants • Steel Plant • Nuclear Installations • Fertilizer Industry • Pharmaceutical Industry • Cryogenic Service • Chemical Industry • Boilers • Paper Plants • Lubrication Systems • Automotive Industry • Steam, Hot Water, Pneumatic Service • Ports & Ship Yards • Defence Industry • Piping
4. metal bellow expansion joint Packaging Exhibition
5. metal bellow expansion joint Warehouse Exhibition
Gongyi Hengzhong Water Materials Supply Co., Ltd. is a manufacturer of rubber joint, transmission joint, expansion joint, flexing rubber joint, waterproof casing, compensator, etc. with well-equipped testing equipment and strong technical force.
With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in water supply and drainage, electricity, metallurgy, urban construction, petroleum, chemical and environmental protection.