SS 304L Instrumentation Tube Fittings Manufacturer, Supplier & Exporter in India
Arrotop manufactures, supplies and exports SS 304L Instrumentation Tube Fittings for process instrumentation, control panels, sampling systems, fluid lines and industrial equipment. These fittings are particularly suitable for fabricated or welded assemblies where the low-carbon stainless steel grade helps maintain corrosion resistance around heat-affected areas.
Our manufacturing range includes SS 304L Compression Tube Fittings, Single Ferrule Tube Fittings and Double Ferrule Tube Fittings for secure connections between instrumentation tubes, threaded ports, valves, gauges and process equipment. Accurate machining of the fitting body, nut and ferrules provides proper tube grip and dependable sealing when the product is matched with suitable tubing and installed correctly.
Stainless Steel 304L Instrumentation Fittings
SS 304L is the low-carbon version of Stainless Steel 304. The reduced carbon level limits carbide precipitation caused by welding or other heat input, improving resistance to intergranular corrosion in welded components. It retains the general corrosion resistance, formability and fabrication characteristics associated with the 304 family.
The commonly used designation for this grade is UNS S30403 / EN 1.4307. EN 1.4306 is a related 304L grade with a somewhat higher nickel content and improved formability. Buyers should mention the exact required designation in their enquiry whenever the project specification calls for either DIN 1.4306 or DIN 1.4307.
SS 304L Instrumentation Tube Fittings are generally selected for air, water, oil, compatible gases and mild process environments. They are not intended as a universal solution for seawater, high-chloride service or highly aggressive chemicals. In such cases, SS 316L, Duplex, SMO 254 or another suitable alloy may be required.
SS 304L Compression Tube Fittings
Arrotop manufactures SS 304L Compression Tube Fittings in different tube-to-tube and tube-to-thread configurations. The range can be supplied in single ferrule and double ferrule designs for new installations, maintenance work, OEM equipment and project requirements.
Available products include:
- SS 304L Male Connectors
- SS 304L Female Connectors
- SS 304L Union Connectors
- SS 304L Male Elbows
- SS 304L Female Elbows
- SS 304L Union Elbows
- SS 304L Male Branch Tees
- SS 304L Female Branch Tees
- SS 304L Male Run Tees
- SS 304L Female Run Tees
- SS 304L Bulkhead Male Connectors
- SS 304L Bulkhead Female Connectors
- SS 304L Bulkhead Unions
- SS 304L Reducing Unions
- SS 304L Union Crosses
- SS 304L Reducer Port Connectors
- SS 304L Front and Back Ferrules
- AISI 304L NPT Male Adapters
- SS 304L BSPT Couplings
- SS 304L BSPP Plugs
- SS 304L Tube Plugs and Tube Caps
SS 304L Single Ferrule and Double Ferrule Tube Fittings
SS 304L Single Ferrule Fittings use one ferrule to grip and seal the tube. Their straightforward construction makes them suitable for applications designed around a single-ferrule connection.
SS 304L Double Ferrule Tube Fittings use separate front and back ferrules. The front ferrule forms the seal, while the back ferrule supports the gripping action on the tube. The right design depends on the project specification, tubing, pressure, temperature and vibration level.
Neither design should receive a blanket pressure rating. The safe working pressure depends on the complete combination of fitting type, tube outside diameter, wall thickness, tube condition, temperature and end connection. Established fitting manufacturers similarly require tubing and pressure ratings to be selected as a complete system.
Sizes, Threads and End Connections
Arrotop can supply SS 304L Instrumentation Tube Fittings for commonly used imperial and metric tube sizes, subject to the fitting type and manufacturing requirements.
Available connection options include:
- Tube × Tube
- Tube × Male Thread
- Tube × Female Thread
- Reducing Tube × Tube
- Bulkhead Connections
- NPT Threads
- BSP Threads
- BSPT Threads
- BSPP Threads
- Metric Threads
- SAE and UNF Threads for selected configurations
Applications of SS 304L Instrumentation Tube Fittings
SS 304L Instrumentation Tube Fittings are mainly selected for fabricated and welded instrumentation systems where good corrosion resistance must be maintained around heat-affected areas. They are suitable for air, water, oils, compatible gases and mild process media that do not require the higher chloride resistance of SS 316L.
- Welded instrumentation tube assemblies
- Process skids with welded tubing and piping connections
- Chemical dosing and sampling panels handling compatible media
- Pharmaceutical process equipment with specified surface finish and documentation
- Food and beverage processing equipment handling compatible fluids
- Laboratory gas and fluid distribution systems
- Water treatment dosing and monitoring systems
- Instrument air tubing on fabricated control panels
- Welded gauge, transmitter and analyser hook-up assemblies
- Utility tubing in chemical and pharmaceutical plants
- OEM equipment requiring low-carbon stainless steel fittings
- Process vessels with welded instrument connections
- Clean utility lines carrying treated water or compatible fluids
- Low-temperature instrumentation and fluid-handling systems
- Maintenance replacement of fittings in existing SS 304L installations
Features of SS 304L Instrumentation Tube Fittings
- Manufactured from SS 304L / UNS S30403 / EN 1.4307 low-carbon austenitic stainless steel.
- Low carbon content reduces carbide precipitation during welding and helps protect welded areas against intergranular corrosion.
- A practical choice for fabricated instrumentation panels, welded tube assemblies and process skids.
- Good resistance to atmospheric exposure, moisture and many mild industrial process fluids.
- Suitable for instrumentation systems carrying air, treated water, oils and compatible gases.
- Available in single ferrule and double ferrule designs to match different tubing and project requirements.
- Precision-machined components provide accurate tube alignment, firm gripping and dependable sealing.
- Good formability and fabrication properties make SS 304L suitable for standard as well as custom fitting configurations.
- Maintains good toughness at low temperatures, making it useful for selected low-temperature instrumentation systems.
- Available for imperial and metric tubing with NPT, BSPT, BSPP, SAE and metric thread options.
- Clean surface finish suits laboratory equipment, pharmaceutical machinery and process systems handling compatible media.
- Standard connectors, elbows, tees, unions, bulkhead fittings, reducers, adapters and ferrules can be supplied.
- Material traceability, EN 10204 3.1 certificates and inspection documents can be provided when specified.
- Offers a cost-effective solution for welded and general industrial service that does not require the higher chloride resistance of SS 316L.
Technical Specifications of SS 304L Instrumentation Tube Fittings
- Product : SS 304L Instrumentation Tube Fittings
- Material Grades : Stainless Steel 304L
- Equivalent Designations : AISI 304L, UNS S30403, EN/DIN 1.4307, JIS SUS 304L
- Alternative European Grade : EN/DIN 1.4306, when specifically required
- Design : Single Ferrule & Double Ferrule
- Imperial Tube Sizes : 1/16″ to 1½”, subject to fitting type
- Metric Tube Sizes : 1.5 mm to 38.1 mm, subject to fitting type
- Thread Types :NPT, BSP, BSPT, BSPP, SAE, UNF and Metric Threads
- Raw Material Standards : ASTM A276 or ASTM A479 for bar stock and ASTM A182 for forged components, as applicable
- Surface Finish : Natural Machined Finish, Passivated or Project-Specific Finish
Why Choose SS 304L for Welded Instrumentation Systems?
SS 304L is commonly used in welded instrumentation assemblies because its lower carbon content helps reduce carbide precipitation around heat-affected areas. This makes it a practical choice for fabricated control panels, process skids, sampling systems and equipment built with welded stainless steel tubing.
Arrotop manufactures SS 304L Instrumentation Tube Fittings for applications that require good general corrosion resistance and compatibility with existing SS 304L tubing and equipment. These fittings are suitable for air, treated water, oils, compatible gases and mild process fluids where the higher chloride resistance of SS 316L is not necessary.
Share the process, media, pressure, temperature and welding details with your enquiry so we can check the material and fitting configuration before quoting.
SS 304L Tube Sizes and Pressure Ratings
Arrotop supplies SS 304L Instrumentation Tube Fittings for commonly used imperial and metric tubing.
Available sizes include:
- Imperial tube sizes from 1/16″ to 1½”
- Metric tube sizes from 1.5 mm to 38.1 mm
- Standard and reducing tube connections
- Single ferrule and double ferrule designs
- Special sizes manufactured against drawings
Thread Types and End Connections
SS 304L Instrumentation Tube Fittings are available with different threads and end connections to match valves, gauges, manifolds, instruments and existing tubing systems.
- NPT male and female threads
- BSP threads
- BSPT tapered threads
- BSPP parallel threads
- SAE straight threads
- UN and UNF threads
- Metric threads
- Tube × Tube connections
- Tube × Male
- Thread connections
- Tube × Female Thread connections
- Bulkhead connections
- Reducing connections
- Weld-end and socket-weld connections, where required
Custom SS 304L Instrumentation Fittings
Standard catalogue fittings may not suit every panel, skid or OEM assembly. Arrotop manufactures custom SS 304L Instrumentation Tube Fittings from drawings, samples or complete dimensional details.
Custom options include:
- Non-standard tube-to-thread combinations
- Metric-to-imperial adapters
- Special reducing connectors
- Extended-body fittings
- Custom bulkhead connectors
- Gauge and instrument adapters
- Special thread lengths
- Weld-end and socket-weld fittings
- Reducer port connectors
- Customer-specific body dimensions and markings
- Project-specific surface finishes
- Prototype and repeat OEM components