• ISO 9001 Certified

    Seamac Piping Solutions Inc. is a reliable is a Manufacturer, Supplier, & Exporter of Pipe Fittings, Forged Pipe Fittings, Forged Fittings, Flanges, Outlets, Long Radius Bends from India.

    Corporate Address : 87, Durgadevi Street, Kumbharwada, Mumbai, Maharashtra(India) 400004

    Warehouse Address : Jai Matadi Industrial Estate , Gala No.3 , Goddev Fhatak Road Bhayander ( East) , Thane , Maharastra ( India).

    Mobile : +91-98332 92291
    Phone Nos. : +91-22-66159077 / 66159078
    E-mail : [email protected]

SS 321 Plate Flanges, Stainless Steel 321 SORF Flanges, 321 Stainless Steel Lap Joint Flanges, ASTM A182 SS 321 / 321H Pipe Flanges, Stainless Steel 321 Socket Weld Flange, SS 321H Spectacle Blind Flanges, Stainless Steel 321 Threaded Flanges, SS 321 / 321H Flanges Manufacturers in India

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321 / 321H Stainless Steel Flanges

We, Seamac Piping Solutions Inc., are manufacturing and supplying a wide range of Flanges in different grades. SS 321/321H Flanges are one of the types of Flanges available in our inventory. Every kind of Flange has its unique qualities and characteristics. By considering all requirements of industrial and to contribute to their growth, we are producing all types of Flanges with various specifications.

Alloy 321 is Austenitic Titanium with Chromium-Nickel Stainless Steel. This grade specially develops to provide Intergranular corrosion resistance. Alloy 321 is suitable for applications where welding under high temperatures is required. This Alloy 321 has 0.08% of Carbon, 0.75% of Silicon, 0.10% of Nitrogen, and 2% Manganese. Alloy 321H is a higher Carbon version of 321 alloys which offers a variety of benefits. Alloy 321H provides good low-temperature toughness, excellent resistance to oxidation, very ductile, and forms quickly. All these features and qualities are beneficial to manufacture Flanges. We, Seamac Piping Solutions Inc., are producing the highest quality SS 321/321H Flanges in a variety of length, standard, dimensions, wall thickness with excellent surface finishing.

Seamac Piping Solutions Inc. carries a wide range of stainless steel 321 / 321h flanges in a variety of lengths, ODs, IDs, size and wall thicknesses to meet your project’s needs—including flanges in dimension as per ASTM , ASME B16.5, B16.47, B16.48 and weight-kg. per mtr. weight & thickness of 321 / 321h stainless steel flanges .

Our SS 321/321H Flanges has properties like corrosion resistance ability, durability, corrode free, resistance to oxidation, toughness, and high weldability property. These beneficial Flanges are perfectly suitable in various industries such as the petrochemical industry, pulp, and paper industry, chemical industry, pharmaceutical industry, aerospace industry, food processing industry, oil and gas industry, and power plant industry.

Seamac Piping Solutions Inc. uses the latest technology and modern tools to produce quality SS 321/321H Flanges. The designing and development of SS 321/321H Flanges is done according to national and international standards. Our team of professional experts is supervising the production of Flanges to assures smoothness in surface finishes and seamless dimensional accuracy. By using sophisticated technology and modern tools, we deliver expected quality Flanges to our clients. With the use of technology, we manufacture SS 321/321H Flanges in bulk amount without compromising in quality.

Stainless Steel 321 / 321H Flanges Specifications

Specification : ASTM A182 / ASME SA182

Dimension Standard : ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

Size : 1/2" (15 NB) to 48" (1200NB)

Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

DIN Flanges : DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673.

JIS Flanges : JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K

BS Flanges : BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.

ASME SA182 Stainless Steel 321 / 321H Flanges Equivalent Grades

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

We are completing urgent orders of the client and offering the highest quality at the same time. By considering all demands, we are providing a perfect and reliable solution to our esteem clients at reasonable rates.


Stainless Steel 321 / 321H Flanges Types

SS 321 / 321H Slip On Flanges

SS 321 SORF Flanges

ASTM A182 SS 321H Slip On Flanges

UNS S32100 Slip on Flange

SS 1.4878 Slip On Flange

SS F321 Slip On Flange

SS 321 / 321H Weld Neck Flanges

SS 321 Weld Neck Flanges

ASTM A182 F321H Weld Neck Flanges

SS 321H WNRF Flanges

UNS S32109 Weld Neck Flanges

SS 1.4541 Weld Neck Flanges

SS 321 / 321H Blind Flanges

Stainless Steel 321H Blind Flange

ASTM A182 SS 321 Blind Flanges

UNS S32100 Blind Flange

SS 321 Blind Flanges

SS 1.4878 BLRF Flanges

SS 321 / 321H Threaded Flanges

Stainless Steel 321 Threaded Flanges

ASTM A182 SS 321 Threaded Flanges

UNS S32109 Threaded Flanges

SS 321H Threaded Flanges

SS 1.4541 Threaded Flanges

SS 321 / 321H Socket weld Flange

Stainless Steel 321 Socket weld Flange

ASTM A182 SS 321H SWRF Flanges

UNS S32100 Socket weld Flange

SS 321 Socket weld Flange

SS 1.4878 Socket weld Flange

SS 321 / 321H Lap Joint Flanges

Stainless Steel 321H Lap Joint Flanges

ASTM A182 SS 321 Lap Joint Flanges

UNS S32109 Lap Joint Flanges

SS 321 Lap Joint Flanges

SS 1.4541 Lap Joint Flanges

SS 321 / 321H Ring Type Joint Flange

Stainless Steel 321H Ring Type Joint Flange

ASTM A182 SS 321 Ring Type Joint Flange

UNS S32100 Ring Type Joint Flange

SS F321 RTJ Flanges

SS 1.4878 Ring Type Joint Flange

SS 321 / 321H Orifice Flange

Stainless Steel 321 Orifice Flanges

ASTM A182 SS 321 / 321H Orifice Flanges

UNS S32109 Orifice Flanges

SS F321 Orifice Flanges

SS 1.4541 Orifice Flange

SS 321 / 321H Long Weld Neck Flanges

Stainless Steel 321 Long Weld Neck Flanges

ASTM A182 SS 321H Long Weld Neck Flanges

UNS S32100 Long Weld Neck Flanges

SS 321 Long Weld Neck Flanges

SS 1.4878 Long Weld Neck Flanges

SS 321 / 321H Spectacle Blind Flanges

Stainless Steel 321 Spectacle Blind Flanges

ASTM A182 SS 321 Spectacle Blind Flange

UNS S32109 Spectacle Blind Flange

SS F321H Spectacle Blind Flange

SS 1.4541 Spectacle Blind Flange

SS 321 / 321H Forged Flanges

Stainless Steel 321 Forged Flanges

ASTM A182 SS 321H Forged Flanges

UNS S32100 Forged Flanges

SS F321H Forged Flanges

SS 1.4878 Forged Flanges

SS 321 / 321H Plate Flanges

Stainless Steel 321 / 321h Plate Flanges

ASTM A182 SS 321 Plate Flange

UNS S32109 Plate Flanges

SS F321 Plate Flange

SS 1.4541 Plate Flanges

Stainless Steel 321 / 321H Flanges Sizes in Stock:

All Flanges is manufactured and tested / inspected to the relevant standards including ASTM, ASME and API etc.

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS4087 Flanges PN14 Flanges 95 67 4 M12 14
AS 2129 Flange Table C Flanges 95 67 4 13 14
Table D Flanges 95 67 4 13 14
Table E Flanges 95 67 4 13 14
Table F Flanges 95 67 4 13 14
Table H Flanges 114 83 4 16 17
Table J Flanges 114 83 4 16 17
ANSI B16.5 Flanges ANSI 150 Flanges 89 60 4 13 16
ANSI 300 Flanges 95 67 4 13 16
ANSI 600 Flanges 95 67 4 13 16
ANSI 900 Flanges 121 83 4 19 22
ANSI 1500 Flanges 121 83 4 19 22
ISO 7005 (DIN) Flange PN6 Flanges 80 55 4 M10 11
PN10 Flanges 95 65 4 M12 14
PN16 Flanges 95 65 4 M12 14
PN20 Flanges 90 60.5 4 M14 16
PN25 Flanges 95 65 4 M12 14
PN40 Flanges 95 65 4 M12 14

Chemical Composition of Stainless Steel 321 / 321H Flanges

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max

Mechanical Properties of SS 321 / 321H Flanges

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Stainless Steel 321 / 321H Flanges Application Industries

  • Chemical Industry
  • Petrochemical industry
  • Marine & Power Transmission industry
  • Power plants
  • Energy industries
  • Furniture
  • Pharmaceutical processing industry
  • Modern architecture
  • Home appliances
  • Water waste projects
  • Synthetic fiber
  • Heat exchanger
  • Fluid piping
  • Dairy and food processing

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