Stainless Steel

Stainless Steel 316L Pipe

Marine-Grade Low-Carbon Austenitic Stainless Steel Seamless, Welded & ERW Pipes, and Sanitary Tubing

Grade SS 316L / TP316L (UNS S31603, Werkstoff 1.4404 / 1.4436, X2CrNiMo17-12-2, SUS 316L, 316S11)
Standard ASTM A312, ASME SA312, ASTM A213, ASME SA213, ASTM A269, ASME SA269, ASTM A249, ASTM A358, ASTM A554, ASME B36.19M, ASME B36.10M, EN 10216-5, DIN 17456 / 17458
Stock Available
Home › Raw Material › Stainless Steel › Stainless Steel 316L Pipe

Product Overview

Om Export India Pvt Ltd is a premier manufacturer, stockist, and global supplier of high-integrity Stainless Steel 316L Pipes and Tubes (ASTM A312 TP316L / UNS S31603 / Werkstoff 1.4404). Grade 316L is the low-carbon modification of molybdenum-bearing austenitic stainless steel, containing 16.0% to 18.0% Chromium, 10.0% to 14.0% Nickel, 2.0% to 3.0% Molybdenum, and a strictly restricted maximum Carbon content of 0.030%. This chemistry prevents chromium carbide precipitation at grain boundaries during welding, granting immunity to intergranular corrosion in the as-welded condition without requiring post-weld solution annealing.

Widely preferred for marine and severe chemical process piping, our SS 316L seamless, ERW, and EFW pipes are manufactured strictly to ASTM A312, ASTM A213, and ASME Section II standards. Operating with a density of 8.00 g/cm³ and offering reliable performance from cryogenic temperatures (-196°C) up to continuous service at 800°F (425°C) and intermittent oxidation resistance up to 1950°F (1065°C), our SS 316L piping systems deliver high pitting resistance (PREN ≥ 23–25) and structural reliability across offshore seawater circuits, chemical processing, dyeing equipment, pharmaceutical manufacturing, and marine engineering.

  • Intergranular Corrosion Immunity: Ultra-low carbon chemistry (≤ 0.030% C) eliminates carbide sensitization in heat-affected zones during field welding.
  • Chloride & Marine Atmosphere Resistance: 2.0%–3.0% Molybdenum content provides protection against localized pitting and crevice corrosion in chloride-rich media.
  • Broad Structural Range & Finishes: Supplied in cold-drawn seamless, fusion-welded ERW/EFW, bright annealed (BA), electropolished, and 600 Grit mirror-polished finishes.

Key Features

  • Immunity to Sensitization: Restricting carbon to ≤ 0.030% prevents intergranular corrosion in welded zones.
  • Chloride Pitting Protection: 2%–3% Molybdenum delivers high resistance to chloride pitting and crevice corrosion.
  • Cryogenic Toughness: Retains non-magnetic austenitic ductility and high Charpy impact strength down to cryogenic temperatures (-196°C).
  • Sanitary Surface Smoothness: Available with bright annealed (BA) and mechanical/electropolished mirror finishes (Ra ≤ 0.4 µm) for pharmaceutical compliance.
  • Formability & Ductility: High elongation (≥40%) permits tight flanging, expanding, cold drawing, and coiling operations.
  • Weld Reliability: Easily welded via TIG, MIG, and SAW using matching AWS ER316L or E316L filler wire without cracking.

Product Specifications

Specification Parameter Standard Specification / Technical Value
Nominal Size Range (Seamless) 1/8" NB to 24" NB (Outer Diameter: 6.00 mm to 609.6 mm OD)
Nominal Size Range (Welded / ERW / EFW) 1/8" NB to 100" NB (Outer Diameter: 6.00 mm to 2540.0 mm OD)
Wall Thickness & Schedules 0.30 mm to 50.0 mm (SCH 5S, SCH 10S, SCH 40S/STD, SCH 80S/XS, SCH 160, SCH XXS)
Governing Standards ASTM A312 / ASME SA312, ASTM A213, ASTM A269, ASTM A249, ASTM A358, ASTM A554
Manufacturing Methods Cold Drawn Seamless (CDS), Hot Finished Seamless, High-Frequency Induction ERW, TIG/Plasma Welded, LSAW
Heat Treatment & Delivery State Solution Annealed at 1040°C – 1150°C followed by rapid water quenching; Bright Annealed (BA)
Standard Lengths Single Random Length (SRL), Double Random Length (DRL), Custom Cut Lengths up to 26,000 mm (26m)
End Configurations & Protection Plain Square Cut End (PE), Beveled End (BE 30°/37.5° per ASME B16.25), Threaded Ends with Plastic Caps

Dimensions & Sizes

Nominal Pipe Size (NPS) Outside Diameter (OD mm / in.) Wall Thickness (WT mm / in.) Nominal Schedule Nominal Weight (kg/m) Nominal Weight (lb/ft)
1/2" NB 21.34 mm (0.840") 1.65 mm (0.065") SCH 10S 0.81 kg/m 0.54 lb/ft
1/2" NB 21.34 mm (0.840") 2.77 mm (0.109") SCH 40S / STD 1.29 kg/m 0.85 lb/ft
1/2" NB 21.34 mm (0.840") 3.73 mm (0.147") SCH 80S / XS 1.65 kg/m 1.09 lb/ft
3/4" NB 26.67 mm (1.050") 1.65 mm (0.065") SCH 10S 1.03 kg/m 0.69 lb/ft
3/4" NB 26.67 mm (1.050") 2.87 mm (0.113") SCH 40S / STD 1.71 kg/m 1.13 lb/ft
3/4" NB 26.67 mm (1.050") 3.91 mm (0.154") SCH 80S / XS 2.23 kg/m 1.48 lb/ft
1" NB 33.40 mm (1.315") 1.65 mm (0.065") SCH 5S 1.31 kg/m 0.88 lb/ft
1" NB 33.40 mm (1.315") 2.77 mm (0.109") SCH 10S 2.13 kg/m 1.43 lb/ft
1" NB 33.40 mm (1.315") 3.38 mm (0.133") SCH 40S / STD 2.54 kg/m 1.68 lb/ft
1" NB 33.40 mm (1.315") 4.55 mm (0.179") SCH 80S / XS 3.29 kg/m 2.17 lb/ft
1-1/4" NB 42.16 mm (1.660") 2.77 mm (0.109") SCH 10S 2.73 kg/m 1.83 lb/ft
1-1/4" NB 42.16 mm (1.660") 3.56 mm (0.140") SCH 40S / STD 3.44 kg/m 2.31 lb/ft
1-1/2" NB 48.26 mm (1.900") 2.77 mm (0.109") SCH 10S 3.16 kg/m 2.12 lb/ft
1-1/2" NB 48.26 mm (1.900") 3.68 mm (0.145") SCH 40S / STD 4.11 kg/m 2.72 lb/ft
1-1/2" NB 48.26 mm (1.900") 5.08 mm (0.200") SCH 80S / XS 5.49 kg/m 3.63 lb/ft
2" NB 60.33 mm (2.375") 2.77 mm (0.109") SCH 10S 3.99 kg/m 2.64 lb/ft
2" NB 60.33 mm (2.375") 3.91 mm (0.154") SCH 40S / STD 5.52 kg/m 3.66 lb/ft
2" NB 60.33 mm (2.375") 5.54 mm (0.218") SCH 80S / XS 7.60 kg/m 5.03 lb/ft
2-1/2" NB 73.03 mm (2.875") 3.05 mm (0.120") SCH 10S 5.35 kg/m 3.59 lb/ft
2-1/2" NB 73.03 mm (2.875") 5.16 mm (0.203") SCH 40S / STD 8.77 kg/m 5.89 lb/ft
3" NB 88.90 mm (3.500") 3.05 mm (0.120") SCH 10S 6.56 kg/m 4.34 lb/ft
3" NB 88.90 mm (3.500") 5.49 mm (0.216") SCH 40S / STD 11.47 kg/m 7.58 lb/ft
3" NB 88.90 mm (3.500") 7.62 mm (0.300") SCH 80S / XS 15.51 kg/m 10.26 lb/ft
4" NB 114.30 mm (4.500") 3.05 mm (0.120") SCH 10S 8.50 kg/m 5.62 lb/ft
4" NB 114.30 mm (4.500") 6.02 mm (0.237") SCH 40S / STD 16.32 kg/m 10.80 lb/ft
4" NB 114.30 mm (4.500") 8.56 mm (0.337") SCH 80S / XS 22.67 kg/m 15.00 lb/ft
6" NB 168.28 mm (6.625") 3.40 mm (0.134") SCH 10S 14.04 kg/m 9.30 lb/ft
6" NB 168.28 mm (6.625") 7.11 mm (0.280") SCH 40S / STD 28.69 kg/m 18.99 lb/ft
6" NB 168.28 mm (6.625") 10.97 mm (0.432") SCH 80S / XS 43.21 kg/m 28.60 lb/ft
8" NB 219.08 mm (8.625") 3.76 mm (0.148") SCH 10S 20.27 kg/m 13.62 lb/ft
8" NB 219.08 mm (8.625") 8.18 mm (0.322") SCH 40S / STD 43.20 kg/m 28.55 lb/ft
8" NB 219.08 mm (8.625") 12.70 mm (0.500") SCH 80S / XS 65.63 kg/m 43.39 lb/ft

Chemical Composition

Element ASTM A312 TP316L (%) UNS S31603 (%) DIN 1.4404 / X2CrNiMo17-12-2 (%)
Carbon (C, Max) 0.030 0.030 0.030
Chromium (Cr) 16.00 – 18.00 16.00 – 18.00 16.50 – 18.50
Nickel (Ni) 10.00 – 14.00 10.00 – 14.00 10.00 – 13.00
Molybdenum (Mo) 2.00 – 3.00 2.00 – 3.00 2.00 – 2.50
Manganese (Mn, Max) 2.00 2.00 2.00
Silicon (Si, Max) 0.75 (1.00 Max) 0.75 1.00
Phosphorus (P, Max) 0.045 0.045 0.045
Sulfur (S, Max) 0.030 0.030 0.015
Nitrogen (N, Max) 0.10 0.10 0.10
Iron (Fe) Balance Balance Balance

Mechanical Properties

Mechanical Property ASTM A312 TP316L Specified Limits Typical Production Values
Tensile Strength, Ultimate (Min) 485 MPa (70 ksi / 70,000 psi) [Min 458 MPa per raw data] 520 – 580 MPa
Yield Strength (0.2% Proof, Min) 170 MPa (25 ksi / 25,000 psi) 210 – 260 MPa
Elongation in 2 in. / 50 mm (Min) 35% – 40% Min 45% – 55%
Hardness (Rockwell B / Brinell, Max) 95 HRB Max / 217 HBW Max 78 – 85 HRB (140 – 170 HBW)
Density & Modulus of Elasticity Density: 8.00 g/cm³ (8000 kg/m³) Modulus of Elasticity: 193 GPa (28 x 10⁶ psi)
Thermal Expansion (0–100°C / 0–538°C) 15.9 µm/m·°C (0–100°C) 17.5 µm/m·°C (0–538°C)
Thermal Conductivity & Specific Heat 16.3 W/m·K at 100°C | 21.5 W/m·K at 500°C Specific Heat (0–100°C): 500 J/kg·K
Electrical Resistivity 740 nΩ·m Melting Point: 1400°C (2550°F)

Standards & Specifications

Standard Designation Governing Organization Scope & Product Description
ASTM A312 / ASME SA312 ASTM / ASME Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes (TP316L / UNS S31603)
ASTM A213 / ASME SA213 ASTM / ASME Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes (TP316L)
ASTM A269 / ASME SA269 ASTM / ASME Seamless and Welded Austenitic Stainless Steel Tubing for General Marine & Corrosive Service
ASTM A249 / ASME SA249 ASTM / ASME Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
ASTM A358 / ASME SA358 ASTM / ASME Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service
ASTM A554 ASTM International Welded Stainless Steel Mechanical and Ornamental Tubing (Round, Square, Rectangular)
EN 10216-5 / DIN 17456 / 17458 European / German Standards Seamless Steel Tubes for Pressure Purposes (Grade 1.4404 / 1.4436 / X2CrNiMo17-12-2)
Indian Boiler Regulations (IBR) Central Boilers Board IBR Certified Steam and High-Pressure Stainless Steel Boiler Piping

Applications

Stainless Steel 316L low-carbon marine-grade pipes and tubes are utilized across demanding marine, chemical, and sanitary process industries:

  • Chemical & Petrochemical Processing: Organic acid storage vessels, acetic and phosphoric acid distribution lines, solvent extraction circuits, and chemical transport containers.
  • Marine & Offshore Engineering: Seawater cooling manifolds, reverse osmosis desalination headers, marine exhaust lines, deck piping, and boat railings.
  • Pharmaceutical & Biotechnology: Water for Injection (WFI) distribution loops, bioreactor vessels, sterile product piping, and CIP/SIP cleaning manifolds.
  • Food, Dairy & Beverage Industry: Sanitary dairy transfer pipelines, brewing equipment, distillation columns, and food processing evaporators.
  • Textile & Dyeing Facilities: Dye vats, bleach equipment, and chemical processing transfer lines subject to corrosive dyestuffs and chlorides.
  • Pulp & Paper Mills: Digester circulation lines, black liquor recovery systems, and chlorine dioxide stage heat exchangers.

Frequently Asked Questions

Q1: What is the main difference between SS 316 and SS 316L pipes?
The primary difference is the carbon concentration: SS 316 allows up to 0.08% Carbon, while SS 316L restricts Carbon to a maximum of 0.030%. The ultra-low carbon level in 316L prevents grain boundary chromium carbide sensitization during welding, making 316L the preferred choice for welded process piping without post-weld solution annealing.

Q2: Why is SS 316L suitable for marine and chloride-heavy applications?
The inclusion of 2.0% to 3.0% Molybdenum enhances resistance to pitting and crevice corrosion in chloride-bearing environments, saline waters, and marine atmospheric conditions compared to standard 304/304L stainless steels.

Q3: How does cold rolling improve the performance of 1.4404 / 316L pipes?
Cold rolling and bright annealing refine the grain structure, boost mechanical tensile and yield strength, achieve tighter wall thickness tolerances, and produce an ultra-smooth internal and external surface that minimizes fouling and enhances fluid flow efficiency.

Q4: What testing certificates are supplied with ASTM A312 TP316L pipes?
All orders are shipped with EN 10204 Type 3.1 / 3.2 Material Test Certificates, IBR Form III-D / III-A statutory documents, 100% Positive Material Identification (PMI) spectro reports, ASTM A262 Practice E intergranular corrosion tests, and 100% Hydrostatic / Eddy Current test certificates.

Related Products

Stainless Steel 410 Pipe

View Product

Stainless Steel 321 Pipe

View Product

Stainless Steel 317L Pipe

View Product

Stainless Steel 310 Pipe & Tube

View Product
← Stainless Steel 316 Pipe
Stainless Steel 316H Pipe & Tube →

Looking For Reliable Industrial Material Supply?

Contact OM Export India for pricing, technical support, stock availability and export enquiries.

Request Quote Call Now
×

Download Company Profile