Ninthore Overseas is one of the Leading Manufacturer And Exporter of Stainless Steel 317L Flanges, which has enabled stainless steels to compete with nickel and titanium – based alloys for service in the most demanding conditions. Generally speaking it is the ability to withstand attack by highly corrosive chemicals that creates such a high level of demand for our Stainless Steel 317L Slip On Flanges within the chemical and petrochemical industrial sectors. Methods are being developed to remove potential pollutants in these Stainless Steel 317L Threaded Flanges from processes as well as products.

Changing national interests among oil – producing countries are affecting sources of raw crude supplies of our Stainless Steel 317L Weld Neck Flanges. One result of these changes is a growing emphasis on materials engineering, and greater interest is being shown in the high – alloy, corrosion resistant steels, especially these Stainless Steel DIN 1.4438 Blind Flanges, to cope with a wide variety of raw crudes. Our Stainless Steel 317L Socket Weld Flanges containing 16 % – 26 % Chromium and 6 % – 22 % Nickel.

Stainless Steel 317L Flanges | Stainless Steel 317L Flanges | Stainless Steel 317L Flanges | Stainless Steel 317L Flanges | Stainless Steel 317L Flanges | Stainless Steel 317L Flanges | Stainless Steel 317L Flanges

These Stainless Steel 317L Lap joint Flanges are non – magnetic and have excellent corrosion resistance, and are not harden able by heat treatment. However, our Stainless Steel 317L Ring Joint Type Flanges can develop high strength even from light cold working. These Stainless Steel 317L Spectacle Blind Flanges have excellent weldability and formability, notable cryogenic properties, and a good hygiene factor.

Stainless Steel 317L Pipe Flanges Specifications
Specifications : ASTM A182 / ASME SA182
Size : 1/2″ (15 NB) to 48″ (1200NB)
: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

SS 317L Pipe Flanges Chemical Composition

Grade C Mn Si P S Cr Mo Ni Fe
SS 317L 0.035 max 2 max 1.00 max 0.045 max 0.030 max 18.00 – 20.00 3.00 – 4.00 11.00 – 15.00 57.89 min

Stainless Steel 317L Plate Flanges Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
7.9 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Equivalent Grades for 317L Stainless Steel Industrial Pipe Flanges

SS 317L 1.4438 S31703 SUS 317L X2CrNiMo18-15-4

SS 317L Flanges 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

Stainless Steel 317L Pipe Flanges 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)