Nipples - Pumps, Valves, Piping and Fittings
Marine nipples are short threaded or socket-weld pipe fittings used to connect pumps, valves, instruments, piping sections and other fittings. They are available in straight, hexagon, reducing and close-nipple configurations, with materials selected for seawater, fuel, ballast, hydraulic or general service.
ProShipWorks provides end-to-end support to source and supply Nipples for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Nipples |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 626 |
| Brands / Manufacturers | Swagelok, Parker, Victaulic, GF Piping Systems |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Male threaded or socket-weld connections |
| 2. Straight, hexagon, close and reducing configurations |
| 3. Available in stainless steel, carbon steel, brass, bronze and nickel alloys |
| 4. Suitable for low- and high-pressure piping systems |
| 5. Corrosion-resistant grades available for seawater service |
Applications of Nipples
| Application |
|---|
| 1. Pump suction, discharge and auxiliary connections |
| 2. Valve, strainer, gauge and instrument connections |
| 3. Ballast, bilge, cooling, fuel and compressed-air piping |
| 4. Shipbuilding and marine repair piping assemblies |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Threaded pipe nipple | Thread standard | ASME B1.20.1 NPT or ISO 7-1 pipe thread | — |
| Forged threaded nipple | Fitting standard | ASME B16.11 | — |
| Carbon steel nipple | Typical material | ASTM A105 forged carbon steel | — |
| Stainless steel nipple | Typical material | ASTM A182 F304/F316 or equivalent | — |
| Bronze nipple | Typical material | Marine bronze or gunmetal, grade subject to system specification | — |
| Pipe nipple | Nominal size | Selected to match connected pipe and fitting size | — |
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 requirements include ASME B16.11 for forged socket-weld and threaded fittings, ASME B1.20.1 for NPT threads, ISO 7-1 or EN 10241 for threaded pipe fittings, and applicable ASTM material standards. Pressure rating and material certification should match the piping system specification. |
|---|---|
| Class Approval | Classification approval is normally project- and service-dependent rather than inherent to a generic nipple. DNV, ABS, Lloyd's Register, Bureau Veritas and ClassNK may accept fittings when they comply with approved piping designs, material certificates, pressure ratings and applicable class rules. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify nominal size, thread type, material, pressure rating and service compatibility before installation. Clean threads, use an approved sealant compatible with the medium, and tighten according to the supplier's guidance without over-torquing. Avoid mixing incompatible thread standards. |
|---|---|
| Maintenance Tips | Inspect accessible nipples during piping rounds for leakage, corrosion, vibration damage and thread deterioration. Check supports and connected components for excessive loading. Replace fittings showing cracks, severe corrosion, damaged threads or leakage; do not repair by welding unless approved by the responsible engineering and class authorities. |
| Safety Notes | Isolate, depressurize, drain and cool the system before removal. Use suitable PPE and verify that the fitting material is compatible with the fluid, temperature and pressure. Never exceed the lowest rated component in the assembly, and treat fuel, steam, hydraulic and chemical lines as hazardous. |
Request a Quote for Nipples
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
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