JIS 10K Pressure Rating Flanged Rubber Expansion Joint: Precision-Engineered Shock Absorbing Bellows for Marine Pipelines
Japanese Industrial Standard Compliant Shock and Vibration Protection for Maritime Infrastructure.
The JIS 10K Pressure Rating Flanged Rubber Expansion Joint is a precision-engineered flexible pipeline compensator specifically built to meet the rigorous demands of marine engineering, shipbuilding, and offshore fluid transfer systems. Naval and commercial vessel piping—including ballast systems, cooling water circuits, fuel lines, and bilge pumping networks—operates under continuous mechanical vibration, severe wave-action hull flexing, and aggressive saltwater corrosion.
Engineered to conform precisely to Japanese Industrial Standards (JIS 10K pressure and drilling patterns), this heavy-duty rubber bellows features a multi-ply elastomeric body reinforced with high-tenacity synthetic cord fabrics and embedded steel wire rings. It acts as an ultra-reliable kinetic energy buffer, absorbing high-frequency engine vibration, dampening dynamic hydraulic shocks, and accommodating thermal and structural pipeline movements. Fitted with precision JIS 10K raised-face backing flanges, this expansion joint ensures a drop-in fit, zero-leakage security, and long-term structural integrity across marine and coastal industrial applications.
Performance characteristics
Full JIS 10K Compliance: Flange dimensions, bolt circle patterns, and pressure containment ratings strictly adhere to JIS B2220 / JIS 10K standards, ensuring seamless compatibility with Japanese-built vessels, pumps, and marine machinery.
Marine-Grade Vibration & Shock Isolation: The high-elasticity elastomeric core dampens engine-induced vibration, machinery hum, and fluid pulsation, preventing fatigue cracking in rigid marine pipe networks.
Hull-Flexing & Thermal Growth Compensation: The engineered flexible arch absorbs multi-axial pipe displacements, easily accommodating axial compression, expansion, lateral shear, and angular deflection caused by thermal variations and vessel hull twisting.
Corrosion & Saltwater Resistance: Formulated with marine-duty rubber compounds (such as high-grade EPDM, NBR, or Neoprene) that resist saltwater degradation, bio-fouling, oil residues, ozone exposure, and harsh coastal weather.
High-Burst Safety Margin: Built with multi-layered, high-tensile synthetic tire-cord plies and continuous wire reinforcement, ensuring an operational working pressure rating of 10 bar ($1.0\text{ MPa}$) with a robust safety burst ratio.
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
100% strict inspection is to be responsible for consumers
|
6. Packaging
Protective Packaging for No
Rust and Breakage
|
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
Q1: What working pressure does a JIS 10K rating specify for this marine expansion joint?
A JIS 10K rating indicates that the expansion joint is engineered to operate continuously at a working pressure of up to 10 kgf/cm² (approximately 10 bar, 1.0 MPa, or 145 PSI) under standard operating temperatures. This matches the standard pressure class for most marine cooling, ballast, and auxiliary fluid handling lines.
Q2: Which rubber material options are best suited for marine pipeline applications?
-
EPDM: The standard choice for seawater cooling lines, ballast systems, fresh water, and mild glycol loops, offering superior resistance to UV, ozone, and saltwater exposure.
-
NBR (Nitrile): Recommended for fuel oil transfer, lube oil lines, oily bilge water, and hydrocarbon-bearing fluids due to its exceptional oil resistance.
-
Neoprene (CR): Excellent for general marine service where oil resistance and outdoor weathering/salt spray defense are both required.
Q3: How does this flexible joint handle ship movement and hull flexing at sea?
Vessels at sea undergo continuous pitch, roll, and hull twisting, which exerts severe shear and bending forces on rigid piping runs. The elastic rubber bellows acts as a flexible hinge and compensator, absorbing structural deflections and preventing stress concentration on pump casings, bulkheads, and pipe supports.
Q4: Are control units (limit rods) necessary for marine installations?
Yes, control units (tie rods) are highly recommended for marine applications, especially on unanchored pipelines or near pumps on flexible mountings. The limit rods restrict excess movement during severe wave action, heavy sea state pitching, or pressure surges, preventing the rubber bellows from over-extending or over-compressing beyond its design limits.
Q5: Can these JIS 10K expansion joints be retrofitted into existing Japanese-built ship pipe networks?
Yes. Because the flanges are precision-machined and drilled to exact JIS 10K dimensions (such as JIS B2220), they serve as exact drop-in replacements for original equipment manufacturer (OEM) marine expansion joints on Japanese, South Korean, and global maritime vessels.
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