Rubber Expansion Joint technical overview.
Rubber Expansion Joint from JINYI is presented in the DN100 · single-sphere expansion joint configuration. Use the dimension schedule, connection details and inspection requirements below when comparing this product with your pipework or equipment drawing.
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What is a rubber expansion joint?
A rubber expansion joint connects specified pipe flanges through a flexible elastomer body. The selected design can accommodate the movements defined for the installation when used within its confirmed limits.
Key dimensions and installation fit
The rubber expansion joint provides a flexible connection between mating flanges. Check nominal size, face-to-face length, drilling and the required movement directions. Axial extension, axial compression, lateral displacement and angular displacement are separate values; combined movements require a separate design check. Compare the metal bellows expansion joint when reviewing construction options; movement, medium, temperature and restraint requirements must be checked for the selected design.
How to specify the rubber expansion joint
Choose the rubber compound, reinforcement and flange material for the fluid and temperature. The installed system may require anchors, guides or control rods to manage pressure thrust. A flexible joint does not replace pipe support or alignment, and movement capacity should be considered together with the selected pressure and temperature conditions.
Technical data for the rubber expansion joint
| Nominal size | DN100 / 4 in |
|---|---|
| Face-to-face length | 150 mm |
| Axial extension | 10 mm |
| Axial compression | 19 mm |
| Lateral displacement | 13 mm |
| Angular displacement | 15° |
| Standard temperature range | −15 to +80 °C |
| Body configuration | 1 sphere |
Sizes and dimensional requirements
The dimensional schedule identifies the illustrated configuration. Compare each value with the mating pipe, equipment or support drawing. A nominal designation does not replace the actual connection diameter, installation envelope or mounting detail. The choices above let you include a different configuration with your quotation request.
Dimensions and tolerance schedule
| Machined length >30–120 mm | ±0.3 mm |
|---|---|
| Machined length >120–400 mm | ±0.5 mm |
Inspection, standards and documentation
Inspect flange alignment, available installation length, gasket contact and the rubber body before fitting. Avoid forcing a joint to compensate for an unsuitable pipe layout. Include the required operating movements, test conditions and restraint arrangement in the enquiry so the complete assembly can be selected.
State the required product standard and edition, material records and inspection acceptance criteria before ordering. Where pressure, temperature, movement or load are relevant, provide the operating and test conditions together. Document requirements should identify the actual component and drawing revision; a general certificate does not replace a dimensional or material record for the ordered item. Review connector and flexible-joint manufacturing when defining the production and acceptance scope.
Where the rubber expansion joint is used
- Flexible equipment connections. Review the movement directions, installation length and restraint arrangement.
- Utility piping. Select the elastomer and flange drilling for the connected system.
- Pump connections. Coordinate alignment, pressure thrust, anchors and guides with the installation design.
How to order a rubber expansion joint
Select the required options and send the quantity, destination, material and controlled drawing to JINYI. Include changed dimensions, mating details, finish, marking and packing requirements. The quotation defines the final configuration, inspection scope and delivery terms so the component can be checked against the intended installation.
Quantity prices and order preparation
| 1–99 sets | US$15.00 per set |
|---|---|
| 100–199 sets | US$14.00 per set |
| 200 sets and above | US$13.30 per set |
Freight and taxes are quoted separately. A different material, size or drawing can change the price and delivery requirements. Confirm the agreed specification before manufacture, and keep the drawing revision, selected options and ordered quantity together in the enquiry.
Other JINYI products worth comparing
Review the rubber joints and metal compensators catalog for other connection and configuration choices.
Request a custom rubber expansion joint quotation from JINYI with the drawing and quantity required for your project.
Rubber Expansion Joint selection and quotation checklist
The elastomer body and flange interfaces must suit the service. Axial, lateral and angular movement limits are separate conditions and cannot automatically be combined at their individual maxima. Use the photographed product form to identify the arrangement, then use the controlled drawing to define what will be supplied. Similar-looking components can have different end details, load paths or maintenance requirements.
Rubber Expansion Joint dimensions and tolerances
The first comparison for this rubber expansion joint is movement limits and face-to-face length. Mark the dimensions that control mating, alignment and installation space on the enquiry drawing. Give units for every value and identify the datum from which it is measured. If a dimension is critical, specify its individual tolerance and measurement method rather than relying on a general tolerance note.
The current schedule identifies nominal size: DN100 / 4 in; face-to-face length: 150 mm; axial extension: 10 mm. Read these entries together with the configuration and tolerance tables above. Reference or example values describe the displayed arrangement; the approved JINYI quotation and drawing define the ordered component. A different interface, material or service condition needs a fresh comparison.
Prepare the material and interface information
For a rubber expansion joint enquiry, identify the required material designation and supplied condition. Describe the mating components, attachment method and environment. Include the operating temperature and any relevant pressure, movement or structural load. These inputs should describe the actual installation, including changes between normal operation, start-up and maintenance where applicable.
Specify coatings, surface finish and marking separately from the base material. If traceability is needed, identify the record required and how it must correspond to the delivered component. Agree whether inspection covers dimensions, material documentation, welds or functional testing; these are different checks with different acceptance criteria.
Custom rubber expansion joint quotation
Attach the latest drawing revision, required quantity and delivery destination when contacting JINYI. Highlight departures from the illustrated arrangement, including changed dimensions, connections, finish and packing. For repeat orders, reference the approved configuration and list changes explicitly so an earlier drawing is not assumed to remain current.
The three price tiers above organise the displayed quantity bands. Compare quotes using the same drawing, material, inspection scope and unit of supply. A piece, a segment and a complete assembly are different units where applicable. Confirm freight, taxes, documentation and delivery terms with the final quotation instead of inferring them from the displayed unit price.
Compare related component arrangements
Evaluate this rubber joint by its actual movement limits and face-to-face length and the required expansion joint arrangement. The photographs below show separate JINYI products for comparison. They are linked to their own technical pages and are not additional gallery views of this rubber expansion joint.
| Photo | Related product | Selection detail |
|---|---|---|
 | Metal Bellows Expansion Joint | Axial movement and spring force. Compare this separate product when the drawing requires its particular arrangement. |
 | Plate Flange | Bore clearance and bolt drilling. Compare this separate product when the drawing requires its particular arrangement. |
 | Rigid Wall Sleeve | Wall thickness and carrier-pipe clearance. Compare this separate product when the drawing requires its particular arrangement. |
Questions to resolve before ordering
Which dimensions need checking first?
Start with movement limits and face-to-face length and the mating or mounting detail. Check nominal designations against measured dimensions, then review the installation envelope. Photographs help identify the form; the drawing provides the dimensional basis for acceptance.
What should the quotation include?
A rubber expansion joint quotation should identify the configuration, drawing revision, material, quantity, price basis and agreed inspection records. Keep these details together with the approved order so receiving inspection can compare the delivered product with the specified component.
Independent terminology reference
Roth expansion joint product families provides an independent reference for component terminology. Use the specified standard and edition where required by the project. This link does not establish JINYI certification, product approval or interchangeability with another manufacturer.
- DN100 / 4 in
- Nominal size
- 150 mm
- Face-to-face length
- ±0.3 mm
- Tolerance
- 3
- Quantity tiers
- Movement specification — List compression, extension, lateral offset and angle separately.
- Pressure thrust — The piping restraint arrangement is part of joint selection.
- Service compatibility — Select the elastomer for the actual medium and temperature.
At a glance
- Product
- Rubber Expansion Joint
- Configuration
- DN100 · single-sphere expansion joint
- Nominal size
- DN100 / 4 in
- Face-to-face length
- 150 mm
- Axial extension
- 10 mm
Dimensions and technical specification
| Parameter | Specification |
|---|---|
| Nominal size | DN100 / 4 in |
| Face-to-face length | 150 mm |
| Axial extension | 10 mm |
| Axial compression | 19 mm |
| Lateral displacement | 13 mm |
| Angular displacement | 15° |
| Standard temperature range | −15 to +80 °C |
| Body configuration | 1 sphere |
