SS 317 / 317L Instrumentation Tube Fittings Manufacturer, Supplier and Exporter in India
Arrotop manufactures, supplies and exports SS 317 / 317L Instrumentation Tube Fittings for chemical-processing plants, pulp and paper mills, petrochemical equipment, heat exchangers, flue-gas treatment systems and industrial lines handling compatible corrosive media.
Our range includes SS 317 Compression Tube Fittings, SS 317L single ferrule fittings and SS 317L double ferrule tube fittings for connecting tubing with gauges, valves, manifolds, transmitters, filters and sampling equipment.
SS 317 and SS 317L contain more molybdenum than the commonly used SS 316L grade. This gives them better resistance to general corrosion, pitting and crevice attack in many chemical and chloride-bearing process conditions. SS 317L is the low-carbon version and is commonly preferred where welding forms part of the system.
Arrotop supplies standard fittings, custom connections and replacement products for OEM, EPC, maintenance and export requirements.
When SS 317 / 317L Is Chosen Over SS 316L
SS 316L covers a wide range of industrial applications, but some process lines need a higher-molybdenum grade. SS 317 / 317L is often specified where chemical concentration, chlorides or operating conditions are more demanding than normal SS 316L service.
The grade is commonly considered for:
- Chemical dosing and transfer systems
- Pulp and paper processing equipment
- Petrochemical sampling lines
- Flue-gas desulphurisation systems
- Heat exchanger instrument connections
- Condenser monitoring lines
- Acid-handling process skids
- Chemical tanker equipment
- Scrubber and emission-control systems
SS 317L is commonly used in chemical tankers, pulp and paper equipment, condensers, heat exchangers, petrochemical systems and flue-gas treatment plants.
Arrotop supplies standard and custom SS 317L Instrumentation Tube Fittings for corrosive process lines, including fittings manufactured from drawings or project specifications.
Available SS 317 / 317L Compression and Ferrule Fittings
The product range includes:
- SS 317 / 317L Male Connectors
- SS 317 / 317L Female Connectors
- SS 317 / 317L Union Connectors
- SS 317 / 317L Male Elbows
- SS 317 / 317L Female Elbows
- SS 317 / 317L Union Elbows
- SS 317 / 317L Male Run Tees
- SS 317 / 317L Female Run Tees
- SS 317 / 317L Male Branch Tees
- SS 317 / 317L Female Branch Tees
- SS 317 / 317L Union Tees
- SS 317 / 317L Bulkhead Male Connectors
- SS 317 / 317L Bulkhead Female Connectors
- SS 317 / 317L Bulkhead Unions
- SS 317 / 317L Straight Unions
- SS 317 / 317L Reducing Unions
- SS 317 / 317L Union Crosses
- SS 317 / 317L Reducer Port Connectors
- SS 317 / 317L NPT Male Adapters
- SS 317 / 317L BSPT Couplings
- SS 317 / 317L BSPP Plugs
- SS 317 / 317L Front and Back Ferrules
- SS 317 / 317L Tube Caps and Tube Plugs
Both Grade 317 / 317L Stainless Steel Single Ferrule Fittings and SS 317L Double Ferrule Tube Fittings are available for imperial and metric instrumentation tubing.
Products can be supplied individually or as a complete fitting schedule against a bill of materials.
Features of SS 317 / 317L Instrumentation Tube Fittings
- Manufactured in SS 317 / UNS S31700 and SS 317L / UNS S31703 / EN 1.4438.
- The higher molybdenum content gives SS 317 / 317L better corrosion resistance than SS 316L in many chemical and chloride-bearing process conditions.
- Offers better resistance to pitting and localised corrosion where standard SS 316L may not be suitable.
- SS 317L has lower carbon and is commonly selected for welded process skids, fabricated equipment and instrumentation assemblies.
- Suitable for chemical-processing plants, pulp and paper mills, petrochemical equipment, heat exchangers and flue-gas treatment systems.
- Available in single ferrule and double ferrule designs for imperial and metric instrumentation tubing.
Technical Specifications of SS 317 / 317L Instrumentation Tube Fittings
- Product : SS 317 / 317L Instrumentation Tube Fittings
- Material Grades : Stainless Steel 317 and Stainless Steel 317L
- UNS Designations : UNS S31700 for SS 317 and UNS S31703 for SS 317L
- European Designation : EN 1.4438 for SS 317L
- Material Type : Higher-molybdenum austenitic stainless steel
- Imperial Tube Sizes : 1/16 inch to 1½ inch
- Imperial Tube Sizes : 1/16″ to 1½”
- Metric Tube Sizes : 1.5 mm to 38.1 mm
- Thread Types : NPT, BSPT, BSPP, SAE, UNF and Metric Threads
- Surface Finish : Natural machined finish or finish specified in the purchase requirement
Applications of SS 317 / 317L Instrumentation Tube Fittings
SS 317 / 317L Instrumentation Tube Fittings are mainly used in chemical-processing plants, pulp and paper mills, petrochemical units and equipment exposed to corrosive process fluids. They are commonly selected for instrument lines where SS 316L may not provide enough resistance to pitting or chemical attack.
Typical applications include:
- Chemical injection and dosing lines
- Acid sampling and analyser panels
- Pressure gauge and transmitter hook-ups in chemical plants
- Pulp digester and bleaching-plant instrument lines
- Chemical recovery systems in paper mills
- Heat exchanger and condenser instrument connections
- Cooling and heating coil connections
- Petrochemical process skids
- Scrubber pressure and chemical dosing lines
- Flue-gas treatment and emission-monitoring systems
- Process tank and vessel instrumentation
- Valve and manifold tubing in corrosive service
- Filter, regulator and metering equipment connections
- Chemical tanker instrumentation systems
- Fertiliser and chemical-processing equipment
- Maintenance replacement fittings for existing SS 317L installations
SS 317L is particularly useful for welded instrumentation assemblies and fabricated process skids where the low-carbon grade is specified.
Arrotop supplies SS 317 / 317L connectors, elbows, tees, unions, bulkhead fittings, reducers, adapters and ferrules for chemical plants, pulp and paper equipment, heat exchangers and petrochemical systems. Standard fittings and components made from drawings or samples can be supplied for project and maintenance requirements.
The suitability of SS 317 / 317L depends on the chemical, concentration, chloride level, temperature and pressure. Share the complete process details with the enquiry so the correct grade and fitting configuration can be considered.
SS 317 / 317L Fittings for Chemical Processing and Acid Service
Chemical-processing systems use instrumentation fittings for sampling, dosing, pressure monitoring and flow measurement. The fittings may come into contact with process chemicals, cleaning solutions or chloride-bearing fluids that require better corrosion resistance than standard SS 316L.
Arrotop supplies SS 317L Tube Fittings for chemical-processing equipment, including:
- Chemical injection and dosing connections
- Acid sampling panel fittings
- Pressure gauge and transmitter hook-ups
- Valve and manifold tubing
- Filter and regulator connections
- Chemical transfer skid fittings
- Process analyser connections
- Tank and vessel instrument lines
- Pump and metering equipment connections
- Custom adapters for chemical skids
Material suitability still depends on the chemical, concentration, temperature and pressure. Share the process details with the enquiry so the required fitting and grade can be reviewed before quotation.
SS 317L Instrumentation Fittings for Pulp and Paper Plants
Pulp and paper plants use aggressive chemicals in digesting, bleaching, washing and recovery processes. Instrumentation fittings may be required around chemical preparation systems, process tanks, bleaching equipment and recovery sections.
Typical requirements include:
- SS 317L fittings for pulp-digester instrument lines
- Bleaching chemical dosing connections
- Pressure and flow transmitter hook-ups
- Process tank level-instrument connections
- Chemical recovery system tubing
- Sampling and analyser panel fittings
- Heat exchanger and condenser instrumentation
- Valve and manifold connections
- Maintenance replacement fittings
Arrotop supplies SS 317L connectors, elbows, tees, unions, reducers and ferrules for new pulp and paper projects as well as plant maintenance requirements.
SS 317 / 317L Fittings for Flue-Gas and Scrubber Systems
Flue-gas cleaning and scrubber systems may contain moisture, acidic condensate and chemical residues. Where the project specifies SS 317 or SS 317L, Arrotop can supply fittings for monitoring, sampling and analyser connections.
Common requirements include:
- Flue-gas analyser line fittings
- Scrubber pressure connections
- Emission-monitoring instrument lines
- Chemical dosing connections
- Mist eliminator monitoring lines
- pH analyser tubing
- Filter and regulator hook-ups
- Pressure and differential-pressure transmitter lines
- Heat exchanger and condenser connections
SS 317L offers slightly better pitting and crevice-corrosion resistance than SS 316L, but the complete operating conditions still need to match the selected grade.
SS 317 or SS 317L: Which Grade Should Be Ordered?
SS 317 and SS 317L provide similar general corrosion performance, but their carbon limits are different.
SS 317 / UNS S31700 may be specified when the project calls for the standard-carbon grade.
SS 317L / UNS S31703 / EN 1.4438 has lower carbon and is commonly selected for welded process assemblies and fabricated equipment.
The purchase enquiry should clearly mention the required grade. Writing only “SS 317 fitting” may not confirm whether the order requires S31700 or the low-carbon S31703 material.
SS 317L is commonly identified as UNS S31703 / EN 1.4438. Mention the exact grade required in the enquiry and material certificate so Arrotop can quote the correct fitting material.
Custom SS 317 / 317L Instrumentation Fittings
Chemical plants, imported machinery and older process systems often use connections that are not available as standard catalogue products.
Arrotop manufactures custom SS 317 / 317L Instrumentation Tube Fittings from drawings, samples or required dimensions.
Custom requirements may include:
- Metric-to-imperial adapters
- NPT-to-BSP thread combinations
- Special reducing connectors
- Extended-body fittings
- Custom bulkhead connectors
- Gauge and transmitter adapters
- Reducer port connectors
- Special thread lengths
- Weld-end connections
- Non-standard body dimensions
- Customer part-number marking
- Repeat fittings for OEM equipment
For replacement requirements, share the existing fitting photograph, tube size, thread details, dimensions and required quantity. When a standard replacement does not match, Arrotop can check whether the fitting can be manufactured from a drawing or a physical sample.
SS 317 / 317L Tube Sizes, Threads and Connections
SS 317 / 317L Instrumentation Tube Fittings are available for imperial and metric tubing in equal, reducing and bulkhead configurations.
Available options include:
- Imperial tube sizes from 1/16″ to 1½”
- Metric tube sizes from 1.5 mm to 38.1 mm
- Tube-to-tube connections
- Tube-to-male thread connections
- Tube-to-female-thread connections
- Reducing connections
- Bulkhead connections
- NPT male and female threads
- BSPT threads
- BSPP threads
- SAE and UNF threads
- Metric threads
- Special adapters against drawings
Mention the tube OD, wall thickness, thread standard and size in the RFQ. Arrotop supplies standard and custom SS 317L NPT connectors, BSPT adapters, BSPP fittings and metric compression tube fittings.
The working pressure depends on the fitting design, tube size, wall thickness, temperature and end connection.
SS 317L vs SS 316L Instrumentation Tube Fittings
SS 316L works well for many industrial instrument lines, but some chemical and chloride-bearing systems require a higher-molybdenum grade. SS 317L offers improved resistance to general corrosion and pitting compared with SS 316L in many compatible process conditions.
SS 317L Instrumentation Tube Fittings are often considered for chemical-processing lines, pulp and paper equipment, condensers, heat exchangers and flue-gas treatment systems where the project specification calls for UNS S31703 or EN 1.4438.
SS 316L should not be replaced with SS 317L—or the other way around—without checking the material specification. Process fluid, chemical concentration, chloride level, temperature and pressure all affect the final grade selection.
Arrotop supplies SS 317L compression tube fittings as an alternative to SS 316L fittings when the drawing, piping specification or material requirement calls for the higher-molybdenum grade.
SS 317L Tube Fittings for Chemical Processing Equipment
Chemical plants use instrumentation tubing around dosing skids, process vessels, sampling panels, analysers, filters, pumps and metering equipment. When these connections handle compatible corrosive chemicals or chloride-bearing fluids, the equipment specification may call for SS 317L instead of the more commonly used SS 316L grade.
Arrotop manufactures SS 317L Tube Fittings for chemical-processing equipment, including:
- Chemical injection and dosing line fittings
- Acid sampling panel connections
- Pressure gauge and transmitter hook-ups
- Process analyser fittings
- Tank and vessel instrument connections
- Valve and manifold tubing fittings
- Pump and metering skid connections
- Filter and regulator adapters
- Chemical transfer skid fittings
- Reducing and mixed-thread connectors
SS 317L contains more molybdenum than SS 316L, giving it better corrosion resistance in many chemical and chloride-bearing process conditions.
For an accurate quotation, share the chemical or process fluid, concentration, operating temperature, pressure, tube size, thread details and required quantity. This information helps identify whether UNS S31703 Instrumentation Tube Fittings for chemical service match the requirements.
SS 317L Fittings for Heat Exchangers, Condensers and Process Coils
Heat exchangers, condensers, cooling coils and heating coils use instrument connections for pressure, temperature, flow and differential-pressure monitoring. These fittings may be required with new equipment or during maintenance, repair and tube replacement work.
Arrotop supplies SS 317L Fittings for heat exchangers and condenser instrumentation, including:
- Pressure gauge connections
- Temperature instrument hook-ups
- Transmitter tubing fittings
- Differential-pressure manifold connections
- Cooling-water monitoring lines
- Heating-coil instrument connections
- Condenser sampling fittings
- Process inlet and outlet monitoring lines
- Vent and drain instrument connections
- Replacement connectors, elbows, tees and ferrules
Heat exchangers, condensers, pipelines, cooling coils and heating coils are recognised uses of the SS 317L grade family in chemical, petrochemical and pulp and paper plants.
Arrotop supplies standard and custom SS 317L compression fittings for heat exchanger tubing systems against fitting schedules, equipment drawings or existing samples.
Custom and Replacement SS 317 / 317L Tube Fittings
Older plants, imported machinery and custom process skids often use tube fittings that are not available in standard catalogue sizes. The requirement may include special threads, longer body dimensions, reduced connections or metric-to-imperial combinations.
Arrotop manufactures custom SS 317 / 317L Instrumentation Tube Fittings from drawings, dimensions or physical samples.
Custom requirements may include:
- Metric-to-imperial tube adapters
- NPT-to-BSP thread combinations
- Special reducing connectors
- Extended male and female connectors
- Custom bulkhead fittings
- Gauge and transmitter adapters
- Reducer port connectors
- Special thread lengths
- Non-standard tube sizes
- Weld-end adapters
- Repeat fittings for OEM equipment
- Replacement fittings for discontinued product lines
For replacement fittings, share clear photographs, tube OD, thread size, body dimensions, material grade and quantity. A drawing or unused sample is helpful when the original part number is not available.
Arrotop can quote replacement UNS S31703 tube fittings and custom SS 317 fittings for plant maintenance, imported equipment and repeat OEM requirements.
SS 317 / 317L Fitting Packages for Plant Shutdowns
Plant shutdowns usually require several types of tube fittings for different equipment areas. Maintenance teams may need connectors, elbows, tees, unions, ferrules, reducers and adapters supplied together against one fitting schedule.
Arrotop supplies SS 317 / 317L Fitting Packages for plant shutdowns, maintenance work and process-equipment overhauls. The package can be prepared against a bill of materials, a fitting schedule or a marked-up drawing.
A shutdown fitting requirement may cover:
- Male and female connectors
- Straight and reducing unions
- Male and female elbows
- Run tees and branch tees
- Bulkhead connectors and unions
- Union crosses
- Front and back ferrules
- Tube caps and plugs
- NPT, BSPT and
- BSPP adapters
- Reducer port connectors
- Custom replacement fittings
- Material certificates when requested
Share the fitting description, SS 317 or SS 317L grade, tube size, thread, quantity, required delivery schedule and inspection documents with the enquiry.
Arrotop supplies SS 317L fittings for chemical plant shutdowns, heat exchanger maintenance, pulp and paper equipment repairs, petrochemical plants and flue-gas treatment systems in India and overseas.
Request a Quote for SS 317 / 317L Instrumentation Tube Fittings
Looking for SS 317 / 317L fittings for chemical processing, pulp and paper equipment, heat exchangers, scrubber systems or an existing process installation? Share the fitting list, drawing or sample along with the tube size, thread, pressure, temperature, process media, quantity and certificate requirements.
Arrotop supplies standard, custom and replacement SS 317 / 317L Instrumentation Tube Fittings from Mumbai, India, for chemical plants, pulp and paper mills, OEMs, EPC contractors, maintenance teams and international buyers.