Ninthore Overseas is one of the Leading Manufacturer And Exporter Of High Quality Stainless Steel 317L Pipes, which is a term coined early in the development of these steels for cutlery applications. Stainless Steel 317L Seamless Pipes was adopted as a generic name for these steels and now covers a wide range of steel types and grades for corrosion or oxidation resistant applications. The main requirement for Stainless Steel 317L Welded Pipes is that they should be corrosion resistant for a specified application or environment. The selection of a particular Stainless Steel 317L EFW Pipes must initially meet the corrosion resistance requirements.

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Stainless Steel 317L Pipes

Stainless Steel 317L Pipes

Additional mechanical or physical properties of Stainless Steel 317L ERW Pipes may also need to be considered to achieve the overall service performance requirements. Stainless Steel 317L Round Pipes are iron alloys with a minimum of 10.5 % chromium. Other alloying elements are added in Stainless Steel 317L Square Pipes to enhance their structure and properties such as formability, strength and cryogenic toughness.

Stainless Steel 317L Rectangular Pipes are most commonly used for their corrosion resistance. The second most common reason Stainless Steel 317L Electropolish Pipes are used is for their high temperature properties. Stainless Steel 317L Hexagonal Pipes can be found in applications where high temperature oxidation resistance is necessary and in other applications where high temperature strength is required. Stainless Steel 317L Hallow Pipes also contains a small amount — typically only 0.5 % — of titanium.

SS 317L Seamless Pipes Specifications
Specifications : ASTM A 312 ASME SA 312 / ASTM A 358 ASME SA 358
Dimensions : ASTM, ASME and API
SS 317L Pipes : 1/2″ NB – 16″ NB
ERW 317L Pipes : 1/2″ NB – 24″ NB
EFW 317L Pipes : 6″ NB – 100″ NB
Size : 1/8″NB TO 30″NB IN
Specialized in : Large Diameter Size
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type : Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form : Round, Square, Rectangular, Hydraulic Etc
Length : Single Random, Double Random & Cut Length.
End : Plain End, Beveled End, Treaded
317L Stainless Steel Pipe Available Sizes
NB Sizes Sch 5 Sch 10 Sch 40 Sch 80 Sch 160
1 1/4″
1 1/2″
2 1/2″
317L Stainless Steel Pipes Chemical Composition
Grade C Mn Si P S Cr Mo Ni N
317L min. 18.0 3.00 11.0
max. 0.03 2.0 0.75 0.040 0.03 20.0 4.00 15.0
Stainless Steel 317L Pipe Mechanical Properties
Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
317L 515 205 35 95 217
Stainless Steel 317L Pipes Physical Properties
Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
317L 8000 193 17.2 17.8 18.4 16.2 21.5 500 720
Equivalent Grades for 317L Stainless Steel Pipe
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
317L S31703 1.4438
SS 317L Seamless / Welded Pipes Application Industries
  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry
317L Steel Pipes Test Certificates
We at Ninthore Overseas provide Manufacturer TC (Test Certificate) in accordance to EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report. We also provide Standard certificates like EN 10204 3.1 and additional requirement like. NACE MR 01075. FERRIT CONTENT as per norms if requested by clients.

• EN 10204/3.1B,
• Raw Materials Certificate
• 100% Radiography Test Report
• Third Party Inspection Report, etc

Material Testing
We at Ninthore Overseas ensure that all our materials go through strict quality tests before dispatching them to our clients.

• Mechanical Testing Such as Tensile of Area
• Hardness Test
• Chemical Analysis – Spectro Analysis
• Positive Material Identification – PMI Testing
• Flattening Test
• Micro and Macro Test
• Pitting Resistance Test
• Flaring Test
• Intergranular Corrosion (IGC) Test


• Commercial Invoice which includes HS Code
• Packing List including net weight and gross weight, number of boxes, Marks and Numbers
• Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
• Fumigation Certificates
• Raw Material Test Reports
• Material Traceability Records
• Quality Assurance Plan (QAP)
• Heat Treatment Charts
• Test Certificates certifying NACE MR0103, NACE MR0175
• Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2
• Guarantee Letter
• NABL approved Laboratory Test Reports
• Welding Procedure Specification/Procedure Qualification Record, WPS/PQR
• Form A for the purposes of the Generalized System of Preferences (GSP)