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ANSI/ASME B16.9 Stainless Steel 321/321H Buttweld Pipe Fittings

321/321H Pipe Fittings, SS 321/321H Pipe Bends, Stainless Steel 321/321H Buttweld Pipe Fittings, ASTM A403 SS 321/321H pipe fittings, ASTM A182 SS321/321H Pipe Fittings, ASTM A240 Stainless Steel 321/321H Flanges manufacturer, Stainless Steel 321/321H Pipe Bends, SS 321/321H Elbow, SS 321/321H Tee, SS 321/321H Reducer, Tee

Stainless Steel Tradename UNS no. Werkstoff No. Density (g/cm3)
321 321 Stainless S32100 1.4541 7.92
321H 321H Stainless S32109 1.4878 7.92

JF Engineering Products LLP is a leading maker and dealer of stainless steel 321/321H buttweld pipe fittings and 321/321H flanges, tee, reducer and bends. We have a complete stock of these stainless pipe fittings such as SS 321/321H elbow, SS 321/321H reducer, SS 321/321H Tee, SS 321 Cross, SS 321/321H Flanges and SS 321/321H Pipe Bends available according to the standard ASTM A403/ A182/ A240 and ANSI B16.9/16.28/ B16.25/ MSS SP-43.

Type 321 is similar to Type 304 Stainless steel but the only differene is the addition of titanium atleast five times the carbon content and titanium reduces carbide precipitation during welding. It is widely used in high temperature environments of upto 900 degree celcius. 321 stainless steel has amazing features such as good welding and forming capabilities. It is also known as UNS S32109 that provide higher temperature strength.

The key features of Stainless Steel 321/321H Pipe Fittings
  • Good Creep Strength
  • Great resistance to corrosion
  • Can be easily drawn and formed
  • Improved resistance to intergranular corrosion
Applications of Stainless Steel 321/321H Pipe Fittings
  • Oil Refinery Equipment
  • Heat Exchangers
  • Boilers and pressure vessels
  • Chemical Industries

Key Properties of Stainless Steel 321 Pipe Fittings, SS 321 Flanges

  • Excellent resistance to oxidation
  • High resistance to corrosion
  • Good creep strength
  • Can be readily formed and drawn
  • High resistance to organic chemicals and inorganic chemicals
  • Strong resistance to nitric acids and moderate resistance sulfur acids
  • Improved resistance to intergranular corrosion

Common Applications – SS 321 Pipe Fittings and 321 Flanges

  • Oil refinery equipment
  • Pressure Vessels
  • Industrial Boilers
  • Chemical and pharmaceutical equipment
  • Chemical process heat exchangers
  • Petrochemical refineries

SS 321 Pipe Fittings Production Range

Specification ASTM A182 / A403 & ASME SA182 / SA403
Type Seamless / Welded / Fabricated
Variants 321, 321H
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Range ½”NB to 48”NB in Sch 10s, 40s, 80s, 160s, XXS.
Dimensions ANSI/ASME B16.9, B16.28, MSS-SP-43.

Buttweld Stainless Steel 321 Pipe Fittings

Seamless/ Welded 100% Radiography Tested

Products Size
SS 321 Elbows – Long Radius SS 321 Stub Ends

Sizes 1/2″ – 48″

SS 321Elbows – Short Radius SS 321 Crosses
SS 321 Reducing Elbows SS 321 Reducing Crosses
SS 321 45° Elbows SS 321 180° LR Return Bends
SS 321 Tees SS 321 180° SR Return Bends
SS 321 Fabricated Tees SS 321 Pipe Bends / Piggable Bends
SS 321 Reducers SS 321 Couplings
SS 321 Concentric Reducers SS 321 Pipe Nipples
SS 321 Eccentric Reducers SS 321 Forged/Plate Cut Rings
SS 321 3D Elbow SS 321 End Caps
SS 321 5D Elbow SS 321 Forged / Plate Circles

High Pressure Forged 321 Pipe Fittings

Threaded and Socket Weld Pipe Fittings

Products Size
SS 321 90° Elbows SS 321 Couplings

Sizes 1/8″ – 4″

Pressure Ratings –
2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS

SS 321 45° Elbows SS 321 Reducers
SS 321 Street Elbows SS 321 Inserts
SS 321 Tees SS 321 Caps
SS 321 Crosses SS 321 Unions

Stainless Steel 321/321H Flanges

Forged and Plate Flanges

Specification ASTM A182 / A240 & ASME SA182 / SA240
Grade 321, 321H
Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size 1/8” to 36″
Dimensions 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.
Product Size
SS 321 Slip-On Flanges SS 321 Threaded Flanges

1/8″ – 36″

Raised Face or Flat Face

SS 321 Weld Neck Flanges SS 321 Socket Weld Flanges
SS 321 Blind Flanges SS 321 Reducing Flanges
SS 321 Lap Joint Flanges SS 321 Plate Flanges

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All fittings and flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

Quality Assurance

At JF Engineering Products LLP, all fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report