Stainless Steel 316L Pipes & Tubes

316L is specified where the pipe will be welded. If your scope involves field welding, spool fabrication or any assembly that cannot be solution annealed afterwards, the low carbon grade is the safer buy. Where welding is minimal and marginally higher strength matters, stainless steel 316 pipes and tubes remain the alternative, and we stock both.

Every SS 316L pipe leaving our facility carries an EN 10204 3.1 Mill Test Certificate, with 3.2 certification, IBR Form III-D and third party inspection by SGS, Bureau Veritas, TUV or Lloyd's available on request. Request a quote with your size, schedule and quantity and we will confirm price and availability the same working day.

What Is Stainless Steel 316L Pipe?

Stainless steel 316L pipe is the low carbon variant of Grade 316 austenitic stainless steel, built on a chromium nickel base with 2 to 3 percent molybdenum added to resist pitting and crevice corrosion in chloride rich media such as seawater, brine and dilute acids. The L stands for low carbon, capped at 0.03 percent against 0.08 percent in standard 316.

That single change has an outsized effect on fabrication. During welding, standard 316 can precipitate chromium carbides at the grain boundaries. Chromium is drawn locally out of solution, the depleted zone loses its passive film, and the heat affected zone becomes vulnerable to intergranular corrosion, a condition known as sensitisation. Holding carbon below 0.03 percent largely prevents carbide formation, so welded 316L pipe does not normally require post weld annealing to restore corrosion resistance. On a large spool package that removes an entire heat treatment step and its associated cost, lead time and distortion risk.

Beyond weldability, SS 316L pipe keeps the core advantages of the 316 family: good strength and toughness across a wide temperature band including cryogenic service down to minus 196 C, combined with 35 percent minimum elongation per ASTM A312 Table 3, which is the ductility needed for bending, flaring and forming into pipe spools, fittings and pressure equipment.

Related reading: what stainless steel 316 is, its uses, grades and composition and the density of stainless steel 316.

SS 316L Pipes & Tubes vs 316, 316H and 316Ti: Which Grade Do You Need?

In short: if the pipe will be field welded or run in chloride rich service, 316L is the safer specification. If sustained temperature above 500 C governs the design, step to 316H. If the assembly is both welded and held at temperature for long periods, 316Ti is the stabilised option. Where welding is minimal and slightly higher room temperature strength matters, 316 applies.

For the more commonly confused comparison against the non molybdenum grade, see 304 vs 316 stainless steel and our 304L pipes and tubes page.

ASTM A312 TP316L Standard and Equivalent Grades of 316L Stainless Steel Pipes

ASTM A312 is the primary specification covering seamless and welded austenitic stainless steel pipe for high temperature and general corrosive service, mirrored as ASME SA312. Within that standard, TP316L designates the low carbon 316 chemistry. For tubular products the equivalent specifications are ASTM A213 for seamless tube and ASTM A249 for welded tube, which is why mill documents and purchase orders frequently carry the triple reference ASTM A312 / A213 / A249 TP316L.

A pipe ordered as TP316L, UNS S31603, 1.4404, 1.4436, SUS 316L, 03Ch17N14M3 or Z2CND17-12 is the same material for all practical chemistry and mechanical purposes. We can certify against any of these designation systems on the Mill Test Certificate.

Stainless Steel 316L Pipes & Tubes Specifications

For instrumentation and hydraulic tube sizes see our instrumentation tubing page. For welded austenitic tube to ASTM A249 and A269 see welded austenitic stainless steel tube.

Chemical Composition of 316L Stainless Steel Pipes and Tubes

Values in percent, per ASTM A312 Table 1. The defining feature is the 0.03 percent maximum carbon, combined with 2 to 3 percent molybdenum. We verify this chemistry by Positive Material Identification using XRF or OES equipment on every lot despatched, specifically to confirm the carbon ceiling that separates S31603 from S31600.

Mechanical and Physical Properties of Stainless Steel 316L Tubes and Pipes

Note that these are the TP316L values, which sit below the TP316 figures of 515 MPa and 205 MPa. Several supplier sites publish the 316 numbers on their 316L pages. Always design to the values on your own Mill Test Certificate.

The service temperatures above are oxidation and scaling limits from published ASM data. For pressure piping design, allowable temperature and stress are governed by the applicable code, typically ASME B31.3 Table A-1 or ASME Section II Part D, and will be lower. Consult your project code before specifying for elevated temperature pressure service. The 8000 kg per cubic metre density is the basis for every weight figure below and for our steel weight calculator.

316L Stainless Steel Pipe Size and Weight Chart

Indicative weights for SS 316L seamless pipe across common schedules. Full range dimensions per ASME B36.19M, with custom sizes and lengths available on request.

Need a different size or schedule? Use our steel weight calculator or the full pipe dimension chart.

Stainless Steel 316L Pipe Schedule Chart, SCH 5S to XXS

Wall thickness in mm per ASME B36.19M.

SS 316L welded and EFW pipe is also available in SCH 20, 30, 60, 120 and 140 for large diameter sizes from 14 inch NB upward. The schedule system is explained in our guide to the difference between Schedule 40 and Schedule 80 pipe.

SS 316L Pipes & Tubes Pressure Rating at 20 C

Indicative allowable working pressures calculated per ASME B31.3 using published TP316L allowable stress of 138 MPa at 20 C.

For code compliant design, calculate per the project code using mill certified wall thickness and the yield value stated on the MTC. These figures do not constitute a design specification. Contact us for pressure ratings at elevated temperature or for specific project code requirements.

Types of SS 316L Pipes and Tubes We Supply

• SS 316L seamless pipe and tube: single piece extruded or drawn construction with no weld seam, for high pressure and critical service from 1/2 inch to 16 inch NB
• SS 316L welded and ERW pipe: electric resistance welded, cost effective for structural and low to medium pressure corrosive service from 1/2 inch to 24 inch NB
• SS 316L EFW and LSAW pipe: electric fusion welded and longitudinal submerged arc welded for large diameter service from 6 inch to 100 inch NB
• SS 316L fabricated pipe spools: custom bends, reducers and flanged assemblies built to project drawings by our piping solutions team
• SS 316L coil tubing and U tubes for heat exchangers, instrumentation and process control loops
• Sanitary tubing to ASTM A249, A269 and A270 for pharmaceutical and food grade lines
• By shape: round, square, rectangular, oval, hexagonal and hydraulic tube
• By finish: annealed and pickled, bright annealed, mechanically polished to No. 4 or No. 8 mirror, and electropolished

Seamless vs Welded 316L Stainless Steel Pipes

Guidance: for critical pressure piping, instrumentation and hygienic process lines under 16 inch NB, seamless 316L is typically specified. For structural applications, large diameter pipelines and general corrosive service, welded and EFW 316L offers equivalent corrosion performance at lower delivered cost, because the weld is fully compatible with the low carbon chemistry and post weld annealing is generally not required. See our detailed article on seamless vs welded pipe for industrial applications.

How Stainless Steel 316L Pipes and Tubes Are Manufactured

• Melting and casting: electric arc furnace melting with argon oxygen decarburisation refining, which is how the 0.03 percent carbon ceiling is achieved, then cast into billets or slabs
• Hot working: billets are extruded or hot rolled into hollow shells for the seamless route, or rolled into strip and plate for the welded route
• Cold drawing: seamless tube and pipe is cold drawn over a mandrel to final dimensions for tighter tolerances and improved surface finish
• Welding: strip or plate is roll formed and longitudinally welded by TIG, MIG, plasma or submerged arc, depending on diameter and wall thickness
• Heat treatment: solution annealing and quenching to restore the austenitic structure and relieve work hardening from cold forming or welding
• Pickling and finishing: acid pickling removes scale, followed by bright annealing, mechanical polishing or electropolishing to the specified finish
• Sizing, cutting and end finishing: cut to single random, double random or fixed length and finished plain, bevelled or threaded
• Testing and marking: chemical, mechanical and dimensional testing before stencilling and final packing

Testing, Inspection and Certification of SS 316L Pipes & Tubes

Every batch of SS 316L pipe and tube is tested and documented per ASTM A312, A213 and A249 requirements:

• Positive Material Identification by XRF or OES on every lot, specifically verifying the 0.03 percent carbon maximum that distinguishes S31603 from S31600
• Mechanical testing for tensile, yield, elongation and hardness per heat and lot
• Intergranular corrosion testing to ASTM A262 Practice A and E, the direct check on sensitisation resistance
• Hydrostatic testing of seamless and welded pipe per ASTM A312
• Non destructive testing by radiography, ultrasonic and eddy current for welded seams
• Flattening, flaring and bend tests for tube products per ASTM A213 and A249
• Visual and dimensional inspection covering OD, wall thickness, length, straightness and surface
• Third party inspection by SGS, Bureau Veritas, TUV, Lloyd's Register or client nominated agencies on request

Documentation includes a Mill Test Certificate to EN 10204 Type 3.1 as standard or Type 3.2 on request, IBR Form III-D for boiler and pressure applications under the Indian Boiler Regulations, and NABL accredited lab reports where required. View our quality certifications and testing capabilities.

Surface Finish Options for 316L Stainless Steel Tubes

Mirror and electropolished finishes are commonly specified for pharmaceutical, food grade and sanitary tubing, where a smooth interior surface minimises product adhesion and simplifies cleaning and sterilisation.

Dimensional Tolerances for Stainless Steel 316L Tubes

Applications of Stainless Steel 316L Pipes & Tubes

• Process and transfer piping for corrosive chemicals and acids, particularly welded spool packages
• Heat exchanger tubes and condenser tubes
• Pharmaceutical and food grade sanitary piping with electropolished or mirror internal finish
• Marine and offshore piping, seawater lines and boat fittings
• Instrumentation and hydraulic tubing
• Architectural railings, facades and structural tube in coastal or polluted environments
• Pressure vessels, columns and reactors, and process equipment
• IBR compliant boiler piping with the appropriate certification
• Pulp and paper digesters, bleaching equipment and white liquor piping where chloride levels rule out 304

Industries We Supply with SS 316L Pipes and Tubes

• Chemical and petrochemical: Resists a wide range of acids, alkalis and chlorides, and stays corrosion resistant after welding
• Pharmaceutical: Mirror and electropolished finishes meet hygienic processing requirements
• Food and beverage: Smooth cleanable surfaces that tolerate CIP and SIP cleaning chemistry
• Marine and shipbuilding: Pitting and crevice resistance in seawater and saline atmospheres
• Oil and gas: Performs in sour and chloride bearing service to NACE MR0175
• Power and boiler: IBR certifiable for steam and feedwater piping
• Construction and architecture: Corrosion resistance with low maintenance on exposed coastal structures
• Pulp and paper: Preferred over 304 where chloride concentrations are elevated in bleaching and digester systems

Stainless Steel 316L Pipes Price in India

Stainless steel 316L pipe price depends on current nickel and molybdenum LME rates and the prevailing alloy surcharge, plus exact size and schedule, surface finish, certification scope and order volume. Because raw material costs move frequently, we quote live rather than publishing a fixed list.

Get today's 316L pipe price against your specific bill of materials.

Export, Packaging and Marking of SS 316L Pipes & Tubes

Operating from Mumbai, we export SS 316L pipes and tubes to more than 40 countries, with established documentation experience across the Middle East, Africa, Europe, Southeast Asia and the Americas. Export shipments include the commercial invoice, packing list, certificate of origin, Mill Test Certificate and, where required, IBR or third party inspection certificates to support customs clearance and project compliance.

• Packing: wooden boxes and cases, bundles with steel strapping, plastic end caps and wrapping for corrosion protection in transit, or to customer specification
• Marking: each length carries grade, size, schedule, specification such as ASTM A312 TP316L, heat and lot number and manufacturer identification for full traceability
• Export packing: seaworthy wooden cases or bundles suitable for container shipment, with customised marking available

Why Choose Amardeep Steel for SS 316L Pipes & Tubes

• Established in 1982 with more than 40 years supplying stainless steel pipes, tubes and stainless steel fittings
• Carbon verified by PMI on every lot, so you receive genuine S31603 rather than 316 sold as 316L
• ISO 9001:2015 certified with EN 10204 3.1 MTC as standard and 3.2 on request
• Ready stock in Mumbai across all schedules from 5S to XXS, with custom manufacture where stock does not cover the size
• IBR Form III-D and third party inspection support for boiler and pressure applications
• Exports to more than 40 countries with export documentation handled in house

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