Shanghai Songjiang Jingning Shock Absorber Co.,Ltd.
| Color | Black |
| Businese Type | Rubber expansion joints manufacturer |
| Axial Displacement | 6-18 mm |
| Delivery Time | 5--15 working days |
| Flange Standard | PN10/16, Class150#, Class300#, JIS5K, JIS10K |
| Flange Material | Carbon steel, SS304, SS316 |
| Company Type | Factory |
| Power | Manual |
| Applicable Media | Air, Water, Oil, Weak Acid and Alkali |
| Application | Pipeline systems |
| Keyword | Rubber Expansion Joint Standard |
| Standard | DIN/ANSI/JIS/BS |
| Temperature Rating | 200°F |
| Feature | Small Volume |
| Shape | Round |
| Oem | Yes |
| Packaging Details | carton or wooden |
| Product Drawings | Offer |
| Payment Terms | Western Union,T/T,L/C,D/A,D/P,MoneyGram |
| Product name | Rubber Expansion Joint Standard High Pressure Resistant In Piping Customized |
| Size | DN50 |
| Warranty | 12 months |
| Supply Ability | 10000 sets per week |
| OEM/ODM | for 20 Year's Experience |
| Connection Type | Flanged |
| Material | EPDM,NBR,NR, CR, FKM |
| Main Frame | Nylon Cord Fabric |
| Head Code | Round |
| Material Of Flange | Q235, SS304, SS316, SS316L |
| Working Temperature | -20℃~150℃ |
| Resistance | Corrosion and abrasion resistant |
| Customized Support | OEM, ODM |
| Nominal Diameter | 32mm - 1800mm |
| Deflection Angle | 10° - 15° |
| Surface Treatment | Cold Galvanized |
| Standard Of Flange | ANSI, DIN, JIS, EN, etc |
| Warranty Time | 12 months |
| In Stock | 20000 |
| Rubber Joint Material | EPDM,NBR,CR,PTFE,etc. |
| Operating Medium | Water, Oil, Air, Chemicals |
| Installation Manual | offer |
| Model Number | RLJS |
| Brand Name | JINGNING |
| Certification | CE，ISO |
| Place of Origin | China |
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Product Specification
| Color | Black | Businese Type | Rubber expansion joints manufacturer |
| Axial Displacement | 6-18 mm | Delivery Time | 5--15 working days |
| Flange Standard | PN10/16, Class150#, Class300#, JIS5K, JIS10K | Flange Material | Carbon steel, SS304, SS316 |
| Company Type | Factory | Power | Manual |
| Applicable Media | Air, Water, Oil, Weak Acid and Alkali | Application | Pipeline systems |
| Keyword | Rubber Expansion Joint Standard | Standard | DIN/ANSI/JIS/BS |
| Temperature Rating | 200°F | Feature | Small Volume |
| Shape | Round | Oem | Yes |
| Packaging Details | carton or wooden | Product Drawings | Offer |
| Payment Terms | Western Union,T/T,L/C,D/A,D/P,MoneyGram | Product name | Rubber Expansion Joint Standard High Pressure Resistant In Piping Customized |
| Size | DN50 | Warranty | 12 months |
| Supply Ability | 10000 sets per week | OEM/ODM | for 20 Year's Experience |
| Connection Type | Flanged | Material | EPDM,NBR,NR, CR, FKM |
| Main Frame | Nylon Cord Fabric | Head Code | Round |
| Material Of Flange | Q235, SS304, SS316, SS316L | Working Temperature | -20℃~150℃ |
| Resistance | Corrosion and abrasion resistant | Customized Support | OEM, ODM |
| Nominal Diameter | 32mm - 1800mm | Deflection Angle | 10° - 15° |
| Surface Treatment | Cold Galvanized | Standard Of Flange | ANSI, DIN, JIS, EN, etc |
| Warranty Time | 12 months | In Stock | 20000 |
| Rubber Joint Material | EPDM,NBR,CR,PTFE,etc. | Operating Medium | Water, Oil, Air, Chemicals |
| Installation Manual | offer | Model Number | RLJS |
| Brand Name | JINGNING | Certification | CE，ISO |
| Place of Origin | China | ||
| High Light | Class 300 rubber expansion joint ，reinforced rubber expansion joint ，thermal growth compensator for refineries | ||
Class 300 Pressure Rating Reinforced Rubber Expansion Joint: Ultra-Durable Thermal Growth Compensator for Refineries
Heavy-Duty Thermal and Pressure Stress Relief for High-Pressure Refining Lines.
The Class 300 Pressure Rating Reinforced Rubber Expansion Joint is an ultra-durable, heavy-duty pipeline growth compensator purpose-built for the extreme working conditions of petroleum refineries, petrochemical units, and high-pressure chemical facilities. Operating under ASME Class 300 standards requires structural integrity that far exceeds standard commercial joints. These severe-service lines face intense thermal expansion cycles, high working pressures, hydraulic shock, and constant mechanical vibration from heavy-duty compressors and transfer pumps.
Constructed with an extra-thick, multi-layered elastomeric body reinforced by embedded high-tenacity synthetic cord plies and solid internal steel restraint rings, this expansion joint maintains high pressure containment up to Class 300 operating envelopes without ballooning or deforming. Equipped with thick, precision-machined ASME B16.5 Class 300 carbon steel or stainless steel backing flanges, it acts as a flexible, vibration-dampening bridge that absorbs complex multi-axial pipe movements, prevents nozzle fatigue on critical turbomachinery, and ensures long-term zero-leakage security across high-stress refinery infrastructure.
Performance characteristics
ASME Class 300 Structural Rating: Precision-engineered with heavy-wall reinforcement layers to operate within ASME B16.5 Class 300 pressure-temperature limits, delivering continuous, reliable pressure containment under high-stress conditions.
Heavy-Duty Multi-Ply Reinforcement: Built with high-tensile synthetic cord plies and embedded high-strength steel wire/ring reinforcement, preventing radial expansion, structural deformation, and pressure surge rupture.
High-Capacity Thermal Growth Relief: The engineered flexible arch configuration smoothly absorbs large thermal growth shifts, simultaneously compensating for axial compression, axial extension, lateral shearing, and angular pipe misalignments.
Exceptional Vibration & Shock Damping: The thick elastomeric matrix acts as an effective kinetic energy absorber, isolating heavy machinery vibration, motor hum, and sudden hydraulic pressure pulsations right at the source.
Refinery-Grade Chemical & Media Resistance: Formulated with high-grade synthetic elastomeric compounds (such as hydrogenated NBR, Neoprene, EPDM, or specialized liners) that resist hydrocarbon derivatives, process oils, steam, and aggressive refinery fluids.
Product Specification
| Size | Length | Allowable Movements in Operation | ||||
| mm | inch | mm | Axial Compression mm | Axial Extension mm |
Transverse Movement mm |
Angular Deflection mm |
| 25 | 1 | 130/152 | 20 | 12 | 14 | 15° |
| 32 | 1 1/4 | 95/130/152 | 20 | 12 | 14 | 15° |
| 40 | 1 1/2 | 95/130/152 | 20 | 12 | 14 | 15° |
| 50 | 2 | 105/130/152 | 20 | 12 | 14 | 15° |
| 65 | 2 1/2 | 115/130/152 | 20 | 12 | 14 | 15° |
| 80 | 3 | 130/135/152 | 20 | 12 | 14 | 15° |
| 100 | 4 | 130/152 | 20 | 12 | 14 | 15° |
| 125 | 5 | 130/152/165 | 20 | 12 | 14 | 15° |
| 150 | 6 | 130/152/185 | 20 | 12 | 14 | 15° |
| 200 | 8 | 130/152/210 | 20 | 12 | 14 | 15° |
| 250 | 10 | 130/203/230 | 20 | 12 | 14 | 15° |
| 300 | 12 | 130/203/245 | 25 | 16 | 22 | 15° |
| 350 | 14 | 200/255 | 25 | 16 | 22 | 15° |
| 400 | 16 | 200/255 | 25 | 16 | 22 | 15° |
| 450 | 18 | 200/255 | 25 | 16 | 22 | 15° |
| 500 | 20 | 200/255 | 25 | 16 | 22 | 15° |
| 600 | 24 | 260 | 25 | 16 | 22 | 15° |
| 700 | 28 | 260 | 25 | 16 | 22 | 15° |
| 800 | 32 | 260 | 25 | 16 | 22 | 15° |
| 900 | 36 | 260 | 25 | 16 | 22 | 15° |
| 1000 | 40 | 260/300 | 25 | 16 | 24 | 15° |
| 1100 | 44 | 300 | 25 | 16 | 24 | 15° |
| 1200 | 48 | 300 | 25 | 16 | 24 | 15° |
|
Note: If the medium is oil, acidic or alkaline substances, and there are special requirements for the working temperature, you can customize it by sending a letter or drawing. Please specify when ordering |
Product Details
Production Flow
|
1.Raw material Top level CR/EPDM/NBR rubber raw materials, No recycled rubber |
2.Plasticating and mixing Special Formulation for better Bending with Nylon,For Better Strength,Sealing |
3.Workblanks wraping Cooper plated steel wire reinforcement prevent pull off |
|
4.Vulcanizing Automatic vulcanization machine ensure vulcanization time and pressure |
5.Inspecting |
6. Packaging |
Application
Rubber Expansion Joint Standard are widely used in various fields, including construction, chemical industry, shipbuilding, tap water, gas, chemical pipelines, petroleum pipelines, food pipelines, air conditioning pipelines, and sewage treatment.
Our Services
1.24-hour online
2.Free samples provided
3.Support customization
4.Provide drawings
5.Multiple payment styles to choose from
6.Factory inspection (material, specifications, quantity, pressure, packaging)
7.Long warranty period
8.Suitable packaging for transportation
Our Customer
Certificate
FAQ
An ASME Class 300 rating corresponds to a maximum working pressure profile of up to 740 PSI (5.1 MPa) at ambient temperatures, depending on the flange material grade and temperature derating factors set by ASME B16.5 standards.
Under Class 300 operating pressures, the pressure thrust forces exerted inside the pipeline are extremely high. Control units (tie rods) act as structural safety stops anchored across the expansion joint flanges. They prevent the flexible rubber arch from over-extending or over-compressing beyond its design limits during pressure surges or thermal cycles, protecting both the joint and unanchored piping equipment.
High-pressure refinery piping expands significantly when exposed to hot process fluids, generating massive mechanical loads. If connected directly to pump or compressor nozzles, these forces cause shaft misalignment, seal failure, and casing cracks. This Class 300 flexible joint absorbs those thermal stresses and mechanical vibrations before they reach the machinery.
Yes. For severe refinery applications involving sour water, aggressive acids, or volatile organic solvents, the internal tube can be integrated with a heavy-duty virgin PTFE liner during vulcanization. This creates a dual-defense barrier—PTFE for absolute chemical immunity and reinforced rubber for high-pressure flexibility.
Yes. The attached heavy-duty backing flanges are precision-drilled to match ASME/ANSI B16.5 Class 300 bolt circle dimensions, hole diameters, and thickness specs, ensuring seamless bolt-on integration into standard high-pressure industrial piping systems.
Company Details
Business Type:
Manufacturer
Year Established:
2004
Total Annual:
30000000-50000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Jingning is a specialist company in expansion joints for pipe equipment. Since 2004 we stand for values which are typical of a family owned company: the spirit of innovation, reliability, continuity and flexibility in thought and action.We are a reliable supplier to our customers who count... Jingning is a specialist company in expansion joints for pipe equipment. Since 2004 we stand for values which are typical of a family owned company: the spirit of innovation, reliability, continuity and flexibility in thought and action.We are a reliable supplier to our customers who count...
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