Threaded Flanges - Pumps, Valves, Piping and Fittings
Threaded flanges are pipe flanges with an internal female thread for connecting threaded pipe without welding. In marine systems they are used mainly on low-pressure utility, instrumentation, ballast, cooling, and service piping where welding is impractical.
ProShipWorks provides end-to-end support to source and supply Threaded Flanges for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Threaded Flanges |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 632 |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Internal female pipe thread |
| 2. No welding required for installation |
| 3. Available in carbon steel, stainless steel, cast iron, and non-ferrous alloys |
| 4. Designed for bolted gasketed flange joints |
| 5. Suitable primarily for low-pressure and moderate-temperature services |
Applications of Threaded Flanges
| Application |
|---|
| 1. Marine pumps and auxiliary piping |
| 2. Valves, strainers, and instrumentation connections |
| 3. Ballast, cooling water, bilge, air, and service piping |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| ASME B16.5 Class 150 Threaded Flange | Various certified flange manufacturers |
| ASME B16.5 Class 300 Threaded Flange | Various certified flange manufacturers |
| EN 1092-1 Type 13 Threaded Flange | Various certified flange manufacturers |
| JIS B 2220 Threaded Flange | Various certified flange manufacturers |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| ASME B16.5 Class 150 | Nominal size range | NPS 1/2 to 24, subject to applicable dimensional limitations | — |
| ASME B16.5 Class 150 | Pipe thread | NPT internal thread to ASME B1.20.1 | — |
| ASME B16.5 Class 300 | Pressure class | Class 300 | — |
| EN 1092-1 Type 13 | Thread standard | ISO 7-1 or EN 10226-compatible pipe thread, as specified | — |
| General marine supply | Typical materials | Carbon steel, stainless steel, ductile iron, cast iron, bronze, or specified alloy | — |
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 B16.5 for flange dimensions and pressure ratings, ASME B1.20.1 for NPT threads, ISO 7-1 or EN 10226 for pipe threads, EN 1092-1 for European flanges, and JIS B 2220 for Japanese flanges. Material and testing requirements may follow ASTM, EN, or equivalent specifications. |
|---|---|
| Class Approval | Marine class acceptance may be required for pressure piping and depends on system service, pressure, temperature, material, and vessel class. DNV, ABS, Lloyd's Register, Bureau Veritas, and ClassNK may accept components supported by approved documentation or type approval. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm flange standard, pressure class, nominal size, thread form, material, gasket, and bolt specification before installation. Match the flange thread to the pipe thread and avoid cross-threading. Apply suitable thread sealant where permitted. Tighten bolts diagonally to the specified torque and verify alignment without forcing the piping. |
|---|---|
| Maintenance Tips | Inspect periodically for corrosion, thread damage, leakage, gasket deterioration, and loose bolts. Check exposed threads and coating condition during maintenance. Replace damaged flanges, gaskets, or fasteners rather than reusing defective parts. Avoid repeated dismantling of heavily loaded threaded joints. |
| Safety Notes | Depressurize, drain, and isolate the line before removal. Verify the flange pressure-temperature rating and material compatibility with the service fluid. Threaded flanges are generally unsuitable for severe vibration, thermal cycling, or high-risk high-pressure services unless specifically approved by the designer and classification society. |
Request a Quote for Threaded Flanges
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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