Eccentric Reducers - Pumps, Valves, Piping and Fittings
Eccentric reducers are tapered pipe fittings with offset centerlines, used to connect different nominal pipe sizes while maintaining a flat side. In marine systems they help control air pockets, drainage, clearance, and pump suction conditions.
ProShipWorks provides end-to-end support to source and supply Eccentric Reducers for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
Last updated:
Product Information
| Product Name | Eccentric Reducers |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 623 |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Offset, non-concentric geometry |
| 2. Available as butt-weld, flanged, threaded, or grooved designs |
| 3. Manufactured in carbon steel, stainless steel, duplex, copper-nickel, or other alloys |
| 4. Supports size transitions in pressurized piping systems |
| 5. Flat-side orientation can assist air removal or drainage |
Applications of Eccentric Reducers
| Application |
|---|
| 1. Marine pump suction and discharge piping |
| 2. Ballast, bilge, fire main, cooling water, and seawater systems |
| 3. Fuel oil, cargo, process, and shipyard piping installations |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| Butt-weld eccentric reducer | |
| Flanged eccentric reducer | |
| Grooved eccentric reducer |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Butt-weld eccentric reducer | Manufacturing standard | ASME B16.9 or EN 10253, as specified | — |
| Butt-weld eccentric reducer | Material | Carbon steel, stainless steel, duplex, or copper-nickel | — |
| Flanged eccentric reducer | Flange standard | ASME B16.5, EN 1092-1, or project specification | — |
| All types | Size | Specified by inlet and outlet nominal pipe sizes | — |
| All types | Pressure rating | Specified by material, connection type, temperature, and piping class | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Common standards include ASME B16.9 for factory-made wrought butt-welding fittings, ASME B16.5 for flanges, EN 10253 for butt-welding fittings, and MSS SP-75 where applicable. Material certificates and testing are normally specified by the vessel piping standard. |
|---|---|
| Class Approval | Approval is project- and vessel-specific. DNV, ABS, Lloyd's Register, Bureau Veritas, and ClassNK may accept the fitting when it complies with approved piping drawings, material requirements, pressure testing, and applicable rules. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify nominal sizes, material, pressure rating, corrosion allowance, and end connection before installation. Install the eccentric side in the orientation required by the system design; pump suction arrangements commonly use a flat side up to reduce air-pocket risk, while drainage arrangements may require flat side down. Follow approved welding or bolting procedures. |
|---|---|
| Maintenance Tips | Inspect for corrosion, leakage, vibration, weld damage, coating failure, and external mechanical loads during scheduled surveys. Check adjacent supports and flange bolts. Replace fittings showing cracking, severe wall loss, distortion, or unacceptable leakage. |
| Safety Notes | Confirm the line is isolated, depressurized, drained, and gas-free before work. Use compatible welding procedures and ventilation for coated or alloy piping. Do not exceed the fitting's approved pressure-temperature rating, and use appropriate lifting and personal protective equipment. |
Request a Quote for Eccentric Reducers
Contact ProShipWorks for marine or industrial product sourcing, quotations and delivery.
- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
- Preferred delivery window
- Shipping agent contact details
Other Pumps, Valves, Piping and Fittings Products
Explore our range of marine and industrial Pumps, Valves, Piping and Fittings products available for sourcing and supply through ProShipWorks.
Why ProShipWorks?
Trusted & Professional Service
Experienced maritime professionals focused on quality, safety and dependable service execution.
24/7 Rapid Response
Fast response for planned and urgent vessel requirements, whenever support is needed.
Unbeatable Prices
Cost-effective marine services with competitive and transparent pricing for vessel requirements.
Port & Anchorage Coverage
Reliable marine service support across ports, anchorages and offshore locations.