Socket Weld Fittings - Pumps, Valves, Piping and Fittings
Socket weld fittings are forged pipe fittings used to connect small-bore shipboard piping by inserting the pipe into a recessed socket and welding around the joint. They are commonly installed in marine pumps, valves, hydraulic, fuel, steam, air, and utility piping systems.
ProShipWorks provides end-to-end support to source and supply Socket Weld Fittings for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Socket Weld Fittings |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 615 |
| Brands / Manufacturers | Bonney Forge, KITZ, Smith-Cooper International |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Forged construction for high-pressure service |
| 2. Socket-weld connection with positive pipe alignment |
| 3. Compact design suitable for restricted machinery-space layouts |
| 4. Available in elbows, tees, couplings, unions, crosses, and reducers |
| 5. Manufactured in carbon steel, stainless steel, alloy steel, and nickel alloys |
Applications of Socket Weld Fittings
| Application |
|---|
| 1. Marine pump suction, discharge, and auxiliary piping |
| 2. Valve manifolds and small-bore shipboard piping |
| 3. Fuel oil, hydraulic oil, compressed air, steam, and utility services |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| ASME B16.11 Class 3000 Socket-Weld Fittings | Bonney Forge |
| ASME B16.11 Class 6000 Socket-Weld Fittings | KITZ |
| ASME B16.11 Forged Socket-Weld Fittings | Smith-Cooper International |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| ASME B16.11 Class 3000 | Pressure class | 3000 | Class |
| ASME B16.11 Class 6000 | Pressure class | 6000 | Class |
| ASME B16.11 Class 9000 | Pressure class | 9000 | Class |
| ASME B16.11 Socket-Weld Fittings | Nominal size range | NPS 1/8 to NPS 4, depending on fitting type and manufacturer | — |
| ASME B16.11 Socket-Weld Fittings | Common materials | ASTM A105 carbon steel, ASTM A182 stainless or alloy steel | — |
| ASME B16.11 Socket-Weld Fittings | Connection | Socket weld | — |
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 | ASME B16.11 covers forged fittings with socket-welding and threaded ends. MSS SP-79 covers socket-welding reducers, MSS SP-83 covers socket-welding and threaded unions, and MSS SP-97 covers integrally reinforced branch outlet fittings. Material specifications commonly include ASTM A105 and ASTM A182. |
|---|---|
| Class Approval | Acceptance for shipboard service may require approval or type acceptance by DNV, ABS, Lloyd's Register, Bureau Veritas, or ClassNK, depending on the vessel, piping system, material, pressure, and applicable class rules. The fitting manufacturer and material certificates should be verified for the specific installation. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm material, pressure class, size, schedule, and piping-system compatibility before installation. Insert the pipe fully into the socket, then withdraw it approximately 1.5 mm to allow thermal expansion during welding. Use qualified welding procedures and maintain correct alignment. |
|---|---|
| Maintenance Tips | Inspect accessible fittings for leakage, corrosion, vibration damage, and weld cracking during planned maintenance. Check supports and nearby pipe strain. Replace fittings showing deformation, severe corrosion, or weld defects rather than attempting unauthorized repairs. |
| Safety Notes | Depressurize, drain, isolate, and gas-free the piping system before cutting or welding. Follow approved hot-work procedures, welding qualifications, material requirements, and permit controls. Use suitable PPE and verify that the fitting pressure and temperature ratings match the service. |
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