Flexible Rubber Joint
Flexible Rubber Joint - industrial steel product
A Rubber Performance Form is typically a document or table used to evaluate and track the key performance characteristics of rubber materials in various applications. This form helps in assessing the suitability of different rubber compounds for specific industrial or product requirements.
A rubber expansion joint is a vital component in piping and equipment systems designed to address various challenges like vibration, shock, noise, and the natural expansion and contraction that occurs due to temperature fluctuations.
These joints are made from rubber or elastomeric materials that provide flexibility and absorb movement, preventing damage to pipes and equipment while ensuring a smoother and quieter operation. Rubber expansion joints also help mitigate the stresses caused by thermal expansion and contraction, which can lead to leaks, cracks, or premature wear and tear. By absorbing these movements, they contribute to extending the service life of the entire system and maintaining its efficiency.
Rubber expansion joint can also be called flexible rubber joints, rubber soft connections, soft joints, flexible rubber joints, rubber expansion joints, shock absorbers, etc. They are pipeline joints with high elasticity, high air tightness, medium resistance and climate resistance.It can reduce the vibration and noise of pipeline, and compensate the thermal expansion and contraction caused by temperature change.
Expansion joints relieve stresses in piping systems, caused by temperature fluctuations, mechanical vibrations and movements.
Rubber expansion joint is also called rubber tube soft joint, flexible rubber joints, rubber soft joints, flexible rubber joints, high pressure rubber joints, rubber shock absorbers, compensators, etc.
Ein Gummi-Kompensator ist ein flexibles Verbindungselement, das häufig in Rohrleitungs- und Anlagensystemen verwendet wird, um Vibrationen, Schocks, Geräusche sowie thermische Ausdehnung und Kontraktion zu verhindern. Sie tragen dazu bei, die Lebensdauer von Rohren und Anlagen zu verlängern.
Ein Gummi-Kompensator, auch bekannt als Gummikompensator oder Gummiausgleichselement, ist ein flexibles Verbindungsstück in Rohrleitungssystemen. Es besteht aus Gummibelägen, die mit Stahlgewebe verstärkt sind, um Bewegung, Vibrationen und thermische Ausdehnung zu absorbieren. Die Hauptfunktion eines Gummi-Kompensators besteht darin, Spannungen und Belastungen zu minimieren, die in Rohrleitungen durch diese dynamischen Kräfte entstehen.
Die Flexibilität eines Gummi-Kompensators ermöglicht axiale, laterale und angulare Bewegungen, was ihn besonders nützlich in Anwendungen macht, in denen Rohrleitungen und Ausrüstungen Bewegungen unterworfen sind. In verschiedenen Industrien wie Chemie, Öl und Gas, Wasseraufbereitung und HLK (Heizung, Lüftung, Klimaanlage) finden sie breite Anwendung.
Gummi-Kompensatoren bieten viele Vorteile, darunter Schalldämpfung, Vibrationsabsorption und Stressentlastung, was zu einer erhöhten Langlebigkeit und Lebensdauer von Rohrleitungssystemen führt. Sie sind in verschiedenen Größen und Konfigurationen erhältlich, um den spezifischen Anforderungen verschiedener Anwendungen gerecht zu werden.
Gummi-Kompensatoren unverzichtbare Elemente für effiziente und zuverlässige Rohrleitungssysteme, da sie die Integrität und Leistung der Anlagen verbessern und gleichzeitig vor vorzeitigen Ausfällen schützen.
Sizes from DN25-DN3000 are all available, special sizes and lengths can also be customised, please contact us for exact data.
| Operation Condition | Details |
|---|---|
| Working temperature | -15-80℃(-30~150℃) |
| Working pressure | 6~40 bars (PN6~PN40) |
| Test pressure | 1.5 times of working pressure |
| Explosion pressure | 2 times of working pressure |
| Applicable media | Air, water, sewage, sea water, acid, alkali, oil etc. |
These joints are critical in absorbing movement, reducing stress, and compensating for misalignment in pipes.
The Double Sphere Rubber Expansion Joint (REJ200) is a type of flexible connector used in piping systems to absorb movement, reduce stress, and compensate for misalignment. This type of expansion joint is designed with two spherical bellows, which enhance flexibility and allow for greater movement absorption compared to single sphere models.
| No. | Name | Material |
|---|---|---|
| 1 | Outer/inner rubber | NR, EPDM, NBR, FKM, Necprnce etc. |
| 2 | Frame | Nylon cord fabric |
| 3 | Pressurized ring | Steel wire strand |
| 4 | Flange | Carbon steel/ Stainless |
|
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| Nominal diameter | Length (mm) | Axial movement | Horizontal movement (mm) |
Defiection angle (a-a) |
||
|---|---|---|---|---|---|---|
| mm | inch | Extension |
Compression |
|||
| 40 | 1 | 165 | 30 | 50 | 45 | 35 |
| 50 | 2 | 165 | 30 | 50 | 45 | 35 |
65 |
2.5 | 170 | 30 | 50 | 45 | 35 |
| 80 | 3 | 175 | 35 | 50 | 45 | 35 |
| 100 | 4 | 225 | 35 | 50 | 40 | 35 |
| 125 | 5 | 225 | 35 | 50 | 40 | 35 |
| 150 | 6 | 225 | 35 | 50 | 40 | 35 |
| 200 | 8 | 325 | 35 | 50 | 40 | 35 |
| 250 | 10 | 325 | 35 | 60 | 35 | 30 |
| 300 | 12 | 325 | 35 | 60 | 35 | 30 |
| 350 | 14 | 350 | 35 | 60 | 35 | 30 |
| 400 | 16 | 350 | 35 | 60 | 35 | 30 |
| 450 | 18 | 350 | 35 | 60 | 35 | 30 |
| 500 | 20 | 350 | 35 | 60 | 35 | 30 |
| 600 | 24 | 400 | 35 | 60 | 35 | 30 |
| No | Name | Material |
|---|---|---|
| 1 | Union | Malleable iron, ss304 |
| 2 | Outer/inner rubber | NR, EPDM, NBR, FKM, Neoprene etc |
| 3 | Frame | Nylon and fabric |
|
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| Nominal diameter | Length (mm) | Axial movement | Horizontal movement (mm) |
||
|---|---|---|---|---|---|
| mm | inch | Extension |
Compression |
||
| 15 | 1/2 | 200 | 22 | 5-6 | 22 |
| 20 | 3/4 | 200/220 | 22 | 5-6 | 22 |
| 25 | 1 | 200 | 22 | 5-6 | 22 |
| 32 | 1 1/4 | 200/220 | 22 | 5-6 | 22 |
| 40 | 1 1/2 | 200/220 | 22 | 5-6 | 22 |
| 50 | 2 | 200/220 | 22 | 5-6 | 22 |
| 65 | 2 1/2 | 240 | 22 | 5-6 | 22 |
| 80 | 3 | 280 | 22 | 5-6 | 22 |
| Content | Details |
|---|---|
| OEM and ODM service | Are supported by SunnySteel! |
| Packing | Usually it is packed by carton case, then put into export plywood case. |
| Normal working pressure | PN16 (Special pressure can be customized) |
The Rubber Expansion Joint End Face Fully Sealed (REJ400) is a specialized type of rubber joint designed for sealing and protecting piping systems under high-pressure and temperature conditions.
| No. | Name | Material |
|---|---|---|
| 1 | Outer/inner rubber | NR, EPDM, NBR, FKM, Necprnce etc. |
| 2 | Frame | Nylon cord fabric |
| 3 | Flange | Carbon steel, 304, 316L |
|
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| Nominal diameter | Length (mm) | Axial movement | Horizontal movement (mm) |
Defiection angle (a-a) |
||
|---|---|---|---|---|---|---|
| mm | inch | Extension |
Compression |
|||
| 32 | 1 1/4 | 95 | 6 | 9 | 9 | 15° |
| 40 | 1 1/2 | 95 | 6 | 10 | 9 | 15° |
| 50 | 2 | 105 | 7 | 10 | 10 | 15° |
| 65 | 2 1/2 | 115 | 7 | 13 | 11 | 15° |
| 80 | 3 | 135 | 8 | 15 | 12 | 15° |
| 100 | 4 | 150 | 10 | 19 | 13 | 15° |
| 125 | 5 | 165 | 12 | 19 | 13 | 15° |
| 150 | 6 | 180 | 12 | 20 | 14 | 15° |
| 200 | 8 | 210 | 16 | 25 | 22 | 15° |
| 250 | 10 | 230 | 16 | 25 | 22 | 15° |
| 300 | 12 | 245 | 16 | 25 | 22 | 15° |
| 350 | 14 | 255 | 16 | 25 | 22 | 15° |
| 400 | 16 | 255 | 16 | 25 | 22 | 15° |
| 450 | 18 | 255 | 16 | 25 | 22 | 15° |
| 500 | 20 | 255 | 16 | 25 | 22 | 15° |
| 600 | 24 | 260 | 16 | 25 | 22 | 15° |
| 700 | 28 | 260 | 16 | 25 | 22 | 15° |
| 800 | 32 | 260 | 16 | 25 | 22 | 15° |
| 900 | 36 | 260 | 16 | 25 | 22 | 15° |
| 1000 | 40 | 260 | 18 | 26 | 24 | 15° |
| 1200 | 48 | 260 | 18 | 26 | 24 | 15° |
| No | Name | Material |
|---|---|---|
| 1 | Outer/inner rubber | NR, EPDM, NBR, FKM, Necprnce etc. |
| 2 | Frame | Nylon cord fabric |
| 3 | Pressurized ring | Steel wire strand |
| 4 | Flange | Carbon steel/ Gal, Stainless |
|
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| DN x DN | Length (mm) | Axial displacement | Horizontal movement | Deflection angle | DN x DN | Length (mm) | Axial displacement | Horizontal movement | Deflection angle | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Extension | Compression | (mm) | (a1 +a2) | Extension | Compression | (mm) | (a1 +a2) | ||||
| (mm) | (mm) | (mm) | (mm) | ||||||||
| 32×25 | 115 | 20 | 30 | 45 | 35° | 125×100 | 200 | 22 | 30 | 40 | 35° |
| 40*25 | 115 | 20 | 30 | 45 | 35° | 150x50 | 200 | 22 | 30 | 40 | 35° |
| 40×32 | 115 | 20 | 30 | 45 | 35° | 150x125 | 200 | 25 | 35 | 40 | 30° |
| 50*32 | 180 | 20 | 30 | 45 | 35° | 200*80 | 200 | 25 | 35 | 40 | 30° |
| 50x40 | 180 | 20 | 30 | 45 | 35° | 200x150 | 200 | 25 | 35 | 40 | 30° |
| 65x32 | 180 | 20 | 30 | 45 | 35° | 250x100 | 220 | 25 | 35 | 40 | 30° |
| 65x50 | 180 | 20 | 30 | 45 | 35° | 300×250 | 220 | 25 | 35 | 40 | 30° |
| 80x40 | 180 | 20 | 30 | 45 | 35° | 350x300 | 240 | 25 | 35 | 35 | 30° |
| 80x65 | 180 | 20 | 30 | 45 | 35° | 400x350 | 240 | 25 | 38 | 35 | 30° |
| 100x40 | 180 | 22 | 30 | 40 | 35° | 500x300 | 240 | 28 | 38 | 35 | 26° |
| 100x80 | 180 | 22 | 30 | 40 | 35° | 500x400 | 240 | 28 | 38 | 35 | 26° |
| 125x50 | 180 | 22 | 30 | 40 | 35° | 600x400 | 240 | 28 | 38 | 35 | 26° |
Special size and length can be customized production for you.
According to the connection method, there are three kinds of flange type, fixed flange type and thread type; according to the structure, it can be divided into five types: single sphere, double sphere, different diameter body, curved sphere and wind pressure coil. The tubular rubber piece is composed of inner and outer rubber, ply and traveler, and is formed by vulcanization molding and loosening with metal flange or parallel joint. This product can reduce vibration and noise, and can compensate for thermal expansion and contraction caused by temperature changes, and is widely used in various piping systems.
| Nominal diameter(DN) | Length | Axial displacement(mm)
|
Horizontal displacement | Deflexion angle | ||
|---|---|---|---|---|---|---|
| mm | inch | mm | Extension | Compression | mm | (a1+a2)° |
| 32 | 1 1/4 | 95 | 6 | 9 | 9 | 15° |
| 40 | 1 1/2 | 95 | 6 | 10 | 9 | 15° |
| 50 | 2 | 105 | 7 | 10 | 10 | 15° |
| 65 | 2 1/2 | 115 | 7 | 13 | 11 | 15° |
| 80 | 3 | 135 | 8 | 15 | 12 | 15° |
| 100 | 4 | 150 | 10 | 19 | 13 | 15° |
| 125 | 5 | 165 | 12 | 19 | 13 | 15° |
| 150 | 6 | 180 | 12 | 20 | 14 | 15° |
| 200 | 8 | 210 | 16 | 25 | 22 | 15° |
| 250 | 10 | 230 | 16 | 25 | 22 | 15° |
| 300 | 12 | 245 | 16 | 25 | 22 | 15° |
| 350 | 14 | 255 | 16 | 25 | 22 | 15° |
| 400 | 16 | 255 | 16 | 25 | 22 | 15° |
| 450 | 18 | 255 | 16 | 25 | 22 | 15° |
| 500 | 20 | 255 | 16 | 25 | 22 | 15° |
| 600 | 24 | 260 | 16 | 25 | 22 | 15° |
Material selection of rubber expansion joints are very variable and depends on the pressure, temperature, fluid etc. parameters. The common materials are, EPDM, IIR, NBR, PTFE and combined with these materials depends of usage area.
Rubber expansion joints are used in piping installations to compensate for thermal growth, relieve piping stress during operation, and reduce vibration and noise caused by rotating equipment.
The majority of expansion joints can be found off the suction and discharge side of every pump; however, they can also be found near boilers, tanks, cooling towers, heat exchangers and the middle of pipe runs. The average life span of a rubber expansion joint is roughly seven to 10 years.
Installing expansion joints and using a high-quality silicone-based sealant is one important step you can take to ensure that your work will last for years to come. Expansion joints allow space in which concrete can contract and expand without causing cracks.
The Rubber Expansion Joint Eccentric Reducing REJ500-P is a specialized type of rubber joint designed to connect pipes of different diameters while accommodating movement, reducing stress, and absorbing vibrations within a piping system.
| No. | Name | Material |
|---|---|---|
| 1 | Outer/inner rubber | NR, EPDM, NBR, FKM, Necprnce etc. |
| 2 | Frame | Nylon cord fabric |
| 3 | Pressurized ring | Steel wire strand |
| 4 | Flange | Carbon steel, 304, 316L |
|
||
| Nominal diameter | Length (mm) |
Tech nical parameters | Tech nical parameters | ||||
|---|---|---|---|---|---|---|---|
| D | D0 | n-φ | D | D0 | n-φ | ||
| 100×80 | 180 | 220 | 180 | 8-φ18 | 200 | 160 | 8-φ18 |
| 150×80 | 200 | 285 | 240 | 8-φ22 | 200 | 160 | 8-φ18 |
| 150×100 | 200 | 285 | 240 | 8-φ22 | 220 | 180 | 8-φ18 |
| 150×125 | 200 | 280 | 240 | 8-φ22 | 250 | 210 | 8-φ18 |
| 200×100 | 200 | 340 | 295 | 8-φ22 | 220 | 180 | 8-φ18 |
| 200×150 | 220 | 340 | 295 | 8-φ22 | 280 | 240 | 8-φ18 |
| 250×100 | 220 | 395 | 350 | 12-φ22 | 220 | 180 | 8-φ18 |
| 250×125 | 220 | 395 | 350 | 12-φ22 | 250 | 210 | 8-φ18 |
| 250×150 | 220 | 395 | 350 | 12-φ22 | 285 | 240 | 8-φ22 |
| 250×200 | 220 | 395 | 350 | 12-φ22 | 340 | 295 | 8-φ22 |
| 300×125 | 280 | 445 | 400 | 12-φ22 | 250 | 210 | 8-φ18 |
| 300×150 | 220 | 445 | 400 | 12-φ22 | 285 | 240 | 8-φ18 |
| 300×200 | 180 | 445 | 400 | 12-φ22 | 340 | 295 | 8-φ22 |
| 300×250 | 220 | 445 | 400 | 12-φ22 | 395 | 350 | 12-φ22 |
| 350×125 | 255 | 505 | 460 | 16-φ22 | 250 | 210 | 8-φ18 |
| 350×200 | 220 | 505 | 460 | 16-φ22 | 340 | 295 | 8-φ18 |
| 350×300 | 220 | 505 | 460 | 16-φ22 | 445 | 400 | 12-φ22 |
| 400×200 | 220 | 565 | 515 | 16-φ22 | 340 | 295 | 8-φ22 |
| 400×250 | 220 | 565 | 515 | 16-φ22 | 395 | 350 | 12-φ22 |
| 400×300 | 220 | 565 | 515 | 16-φ22 | 445 | 400 | 12-φ22 |
| 450×200 | 220 | 615 | 565 | 20-φ26 | 340 | 295 | 8-φ22 |
| 450×250 | 220 | 615 | 565 | 20-φ26 | 395 | 350 | 12-φ22 |
| 500×300 | 255 | 670 | 620 | 20-φ26 | 445 | 400 | 12-φ22 |
| No. | Name | Material |
|---|---|---|
| 1 | Outer/inner rubber | NR, EPDM, NBR |
| 2 | Key frame | Nylon cord fabric |
| 3 | Clamp | Stainless 304 |
|
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| DN | O.D. of pipe (mm) | Length (mm) | Axial movement | Horizontal movement (mm) |
Deflexion angle (a+ a1)o | |
|---|---|---|---|---|---|---|
| Extension (mm) |
Compression (mm) |
|||||
| 50 | 60.3 | 180 | 20 | 25 | 15 | 20 |
| 65 | 76 | 180 | 20 | 25 | 15 | 20 |
| 80 | 89 | 180 | 20 | 25 | 15 | 20 |
| 100 | 114 | 180 | 20 | 25 | 15 | 20 |
| 125 | 133 | 180 | 20 | 25 | 15 | 20 |
| 150 | 159 | 180 | 20 | 25 | 15 | 15 |
| 200 | 219 | 200 | 20 | 25 | 15 | 10 |
| 250 | 273 | 200 | 20 | 25 | 15 | 10 |
| 300 | 325 | 200 | 20 | 25 | 15 | 8 |
| 350 | 327 | 200 | 20 | 25 | 15 | 8 |
| 400 | 426 | 200 | 20 | 25 | 15 | 8 |
| 500 | 530 | 200 | 20 | 25 | 15 | 6 |
| 600 | 630 | 200 | 20 | 25 | 15 | 6 |
Compensation of axial movement with a compensator without tie rods
Compensation of axial and lateral movement with compensators without tie rods
Compensation of lateral and axial movement with compensators without tie rods on each pipe
Compensation of a large axial movement with two hinge compensators
Compensation of movements in 2 planes with 3 angular compensators. The advantages are the absorption of large movements, weak adjustment force, weak movement resumption
Compensation of lateral and axial movement with compensators without tie rods on each pipe
Cracking:
Exterior surface cracking is most commonly the result of aging or elevated temperature. Because of rubber ages, it becomes hard and brittle and loses inherent flexibility and resilience. Cracking or crazing may not be serious if only the outer cover is involved and the fabric is not exposed. If necessary, repair onsite with rubber cement where cracks are minor. Carefully inspect cracks to determine if underlying fabric reinforcing plies are compromised.
Exposure of Metal Reinforcement:
If the metal reinforcement of an flexible rubber expansion joint is visible through the cover, the rubber expansion joint should be replaced ASAP.
Dimensions:
Any inspections should verify that the installation is correct; no excessive misalignment between the flanges exists; and the installed face-to-face dimension is correct. Check for over-elongation, over compression, lateral or angular misalignment. If incorrect installation has caused the expansion joint to fail, adjust the piping and order a new expansion joint to fit the existing installation.
Rubber Deterioration:
If the joint feels soft or gummy, plan to replace the flexible rubber expansion joint as soon as possible. Chemical attack is the most likely cause.
Leakage:
It is most important to determine where the leak originated prior to implementing any corrective action. If leakage or weeping is occurring from any surface of the expansion joint, except where flanges meet, replace the joint immediately.
Rubber expansion joints have been specified and successfully used for many years to accommodate pressure loads, relieve movement stresses, reduce noise, isolate vibration, compensate for misalignment after plants go on stream and prolong the life of pumps and other motive equipment.
Insert the bolts in the flanges with the head loward the joints. Tighten the bolts in opposite pairs. The bolts and nuts shall be tighten in progressive and crosswise with bolting pressure evenly distributed. Tighten opposing Nuts/bolts gradually according to the fullwing sequence.
The control rod assemblies are pre-set at the maximum allowable expansion and/or contraction of the joint during the commissioning or operating. It is strictly recommended for unanchored/unsupported systems and also spring-mounted pumps or equipment. Control rod joints must be strictly used when the movement/pressure exceeds the permissible limit.
Installation of the SunnySteel joint shall be carried out while maintaining the existing state. Do not use force to tighten the distance in order to fill the reserved gap.
Typical Piping Layout Utilizing Expansion Joints When Equipment And Piping Are Properly Anchored.
Typical Piping Layout Utilizing Expansion Joints and the Proper Use of Anchors in Branch Locations.
Typical Pump Installation With SunnySteel Expansion Joints Utilizing Vibration Mounts.
Typical Piping Layout Showing The Use Of SunnySteel When Proper System Anchoring Is Limited.
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When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
