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Non-metallic expansion

Rubber expansion joints 

Rubber expansion joints are flexible connectors for the construction of pipe systems. They relieve system strain by reducing vibration and noise and compensate static or dynamic movements caused by thermal change, load stress, pumping surges or construction settlement. 


They also compensate assembling inaccuracies (misalignment during installation) and can be used as pipe insert pieces to facilitate inspections.


Our huge product range consists of more than 150 types of rubber expansion joints in 8 different rubber qualities and various rubber inserts . This choice of different types of rubber expansion joints allows a precise solution to be found for every application. 


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    Typical Wide Arch Expansion Joint Movement/Spring Rate Capabilities

    Nominal Pipe Size Expansion JointNominal Face-to-faceMOVEMENTSSPRING RATES
    AXIAL COMPRESSIONAXIAL EXTENSIONLATERAL DEFLECTIONDEGREES OF ANGULAR MOVEMENTDEGREES OF TORSIONAL MOVEMENTAXIAL COMPRESSIONAXIAL EXTENSIONLATERAL DEFLECTIONANGULAR MOVEMENT
    inmminmminmminmminmmlbs/inN/mmlbs/inN/mmlbs/inN/mmft-lbs/ degNm/deg
    1*2561503/4197/16115/81634.431763122839262460.030.04
    1-1/4*3261503/4197/16115/81628.132203828750328570.0750.1
    2001/1/24061503/4197/16115/81623.132654634460393690.110.15
    25061503/4197/16115/81618.133175541472525920.220.3
    2002/1/26561503/4197/16115/81614.4339769517905711000.3750.51
    37561503/4197/16115/81612.53476836211096181080.60.81
    2003/1/28861503/4197/16115/81610.43556977241276661170.9751.32
    410061503/4197/16115/8169.436361118281457141251.4251.93
    512561503/4197/16115/8167.53793139103218181914334
    615061503/4197/16115/8166.23953167123921792516257
    820061501-3/163011/16175/8166.931059185137824111291981013
    1025082001-3/163011/16173/4195.631324232172230212132121824
    1230082001-3/163011/16173/4194.731588278206636214222493243
    1435082001-3/163011/16173/4194.121390243180831716752931419
    1640082001-3/163011/16173/4193.421588278206636219293385777
    1845082001-3/163011/16173/4193.1117863132326407213037380108
    2050082001-7/16373/4193/4193.11198734825804522382417114155
    22550102501-7/16373/4193/4192.81218538328394972472433154209
    24600102501-7/16373/4193/4192.51238341730975422559448205278
    26650102501-5/8411253/4192.91229540229855232743480219297
    28700102501-5/8411253/4192.51247243332145632928513286388
    30750102501-5/8411253/4192.51264946434456033112545328445
    32800102501-5/8411253/4192.21282749536746433657640416564
    34850102501-5/8411253/4192.21300152542017364201736484656
    36900102501-5/8411253/4191.91317855641347244746831633926
    38950102501-5/8411253/4191.91335658843637644876854707959
    401000102501-5/8411253/4191.913531618459380450078777811059
    421050123001-7/8481253/4191.913339585433775951348998721182
    441100123001-7/8481253/4191.913498613454379653569389521291
    461150123001-7/8481253/4191.6136526404754832557797712601708
    481200123001-7/8481253/4191.61381566849568685799101613691856
    501250123001-7/8481253/4191.61397569651639046018105414762001
    521300123001-7/8481253/4191.61413472453749416235109216032173
    541350123001-7/8481253/4191.61429375255769766454113017312347
    561400123001-7/8481253/4191.614452780578710136672116818482505
    581450123001-7/8481253/4191.214611807599410506888120624823365
    601500123001-7/8481253/4191.214770835620110867104124426533597
    661650123001-7/8481253/4191.215247919682111947662134232164360
    721800123001-7/8481253/4191.10.557241002744113038215143942615777
    781950123001-7/8481253/4191.10.562011086806114128926156352667140
    842100123001-7/8481253/41910.566781169868115209637168864818787
    962400123001-7/8481253/4190.870.576321337992117371106219371008113668
    1022550123001-7/8481253/4190.820.5810914201054218461177520621272517253
    1082700123001-7/8481253/4190.770.5858615031116219551248921871639122223
    1203000123001-7/8481253/4190.70.5954016701240321721391224362240330374
    1323300123001-7/8481253/4190.640.51049418381364223891521626652516034112
    1443600123001-7/8481253/4190.590.51144820051488226061651928933217643625


    Rubber expansion joints 

    Rubber expansion joints are flexible connectors for the construction of pipe systems. They relieve system strain by reducing vibration and noise and compensate static or dynamic movements caused by thermal change, load stress, pumping surges or construction settlement. 


    They also compensate assembling inaccuracies (misalignment during installation) and can be used as pipe insert pieces to facilitate inspections.


    Our huge product range consists of more than 150 types of rubber expansion joints in 8 different rubber qualities and various rubber inserts . This choice of different types of rubber expansion joints allows a precise solution to be found for every application. 


    Description

    Rubber expansion joints are flexible “bellows” manufactured by vulcanization of rubber mixture together with reinforced textile, or steel yarns.


    For increase of pressure resistance of rubber expansion joints is inserted in middle wall of bellows a reinforcement from textile or steel yarns.


    Rubber expansion joints are with swivel – galvanized flanges, fixed flanges, or threaded fittings with BSPP threads.

    Rubber expansion joints are manufactured in dimensions from DN20 to DN2400mm.


    Thermal resistance of rubber expansion joints is from -25°C up to max. 130°C, depending on material of used rubber and inside reinforcement of expansion joint.


    Pressure resistance of rubber expansion joints in standard version is PN6,10 and 16(nominal pressure is at temperature 20°C). Pressure resistance depends from type and dimension and max. working temperature of medium. At working pressure of medium higher than 50°C is necessary to correct pressure resistance of expansion joint. Size of correction depends from type of expansion joint and material of “bellows”.


    Use of rubber expansion joints

    Rubber expansion joints are used for elimination of thermal dilatation in pipelines. The largest range of applications they found in vibration damping applications, vibration and noise from pumps and other vibrating pipe aggregates.


    Fabric expansion joints 

    Selecting the right fabric expansion joint for your system is important toward ensuring reliable operation. A properly designed and installed fabric expansion joint can ensure uninterrupted plant performance between scheduled maintenance shutdowns. 


    By combining different materials for the fabric expansion joints and taking into consideration the thermal, chemical and mechanical resistance as well as the fatigue properties of the material, our designers provide the optimum solutions both technically and economically.


    We deliver all types and sizes of fabric expansion joints - for all industrial applications - including power generation, refineries, pharmaceutical industry, food industry, cement industry and many others.


    Description

    All used materials are 100% asbestos free. To increase thermal resistance are at manufacture of fabric expansion joints used fabrics based on glass, or ceramic yarns, or there is before expansion joint inserted thermal-insulating layer.


    Construction of fabric expansion joints is designed always for particular application. Fabric expansion joints are manufactured in circular and also non-circular sections.


    Fabric expansion joints are manufactured with ending for clamping buckle/back up bars, or with flange ending.

    Dimensions and used materials of fabric expansion joints are designed according to specific site of application and specific working loads.


    Fabric expansion joints are designed exclusively for the pipes with gaseous media, for the elimination of thermal dilation of the duct, fan vibration and so on. (air, flue gas, ...). They can be used for chemically aggressive acidic or alkaline gases.


    Thermal resistance of fabric expansion joints is up to 1200 ° C. Pressure resistance of fabric expansion joints max. 0.1 MPa.


    Fabric expansion joints can capture movements in all directions and due to their low stiffness they burden pipeline minimally. In case that the gas flow velocity reaches more than 10 ms-1, or contains abrasive particles, is necessary to protect expansion joint by inner protective tube.


    The use of fabric expansion joints

    Fabric expansion joints are used to insulate, to avoid mechanical loads and to protect against abrasion. They offer advantages for the pipe work designer as they can absorb movements simultaneously in several directions. ... Fabric expansion joints are installed in systems operating with low pressure and dry media.



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