Stainless Steel Tradename UNS no. Werkstoff No. Density (g/cm3)
304 304 Stainless S30400 1.4301 8.0
304L 304L Stainless S30403 1.4307 8.0
304H 304H Stainless S30409 1.4948 8.0
304LN 304LN Stainless S30453 1.4311 8.0


METLINE Industries is a leading manufacturer and exporter of stainless steel 304 grade buttweld pipe fittings and flanges. METLINE offers a complete range of stainless steel 304/304L pipe fittings such as SS 304 reducer, SS 304 elbow, SS 304 tee, SS 304 cross, SS 304 stub ends and SS 304 pipe bends. Stainless steel 304 and 304L pipe fittings are manufactured in compliance with ASTM A-403 and ANSI B16.9 / 16.28/ MSS SP-43 / Welding Bevel Standards ANSI B 16.25.

We specialise in the manufacture and supply of SS 304 pipe bends in both standard and non standard sizes, with bending radius of 1D to 10D or any other custom bending radius. We offer ex-stock delivery of various standard size and type 304 pipe fittings, 304 flanges and 304 pipe bends. Our specialty is to manufacture and supply large size fabricated 100% radiography tested 304 elbows, 304 reducers, and 304 tees.

Grade 304 is most commonly referred as the standard “18/8” stainless steel and is one of the most widely used stainless steel grade across the globe. 304H stainless steel offers higher strength compared to common grade 304, as it contains higher carbon content. The key benefits which 304H offers include higher heat resistant properties, tensile strength and creep strength.

METLINE also stocks and supplies a complete range of SS 304 | 304L pipes to complement our existing production range of 304 buttweld fittings and flanges. Stainless steel 304 pipes can be supplied in cut to length sizes and also machined or fabricated to meet your piping requirements.

SS 304/304L Flanges Manufacturer/Supplier

SS 304/304L Flanges Manufacturer/Supplier

SS 304/304L Pipe Fittings Manufacturer/Supplier

SS 304/304L Pipe Fittings Manufacturer/Supplier

SS 304/304L Pipes Supplier/Stockholder

SS 304/304L Pipes Supplier/Stockholder

Key Properties of Stainless Steel 304/304L Pipe Fittings, 304/304L Flanges

  • Excellent corrosion resistance in a wide range of atmospheric environments
  • Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C
  • Good resistance to carbide precipitation
  • Good machining properties
  • Stainless Steel 304H offers higher strength at elevated temperatures
  • Excellent weldability with and without filler metals

Common Applications – SS 304/304L Pipe Fittings, 304/304L Flanges

  • Food processing equipment
  • Equipment and appliances
  • Architectural railings
  • Pharmaceutical and chemical process equipment
  • Heat exchangers
  • Threaded fasteners
  • Springs
  • Industrial fabrications

SS 304/304L Pipe Fittings Production Range

Specification ASTM A182 / A403 & ASME SA182 / SA403
Type Seamless / Welded / Fabricated
Variants 304, 304L, 304H, 304LN
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 304/304L Pipe Fittings

Seamless/ Welded 100% Radiography Tested

Products Size
SS 304 Elbows – Long Radius SS 304 Stub Ends

Sizes 1/2″ – 48″

SS 304Elbows – Short Radius SS 304 Crosses
SS 304 Reducing Elbows SS 304 Reducing Crosses
SS 304 45° Elbows SS 304 180° LR Return Bends
SS 304 Tees SS 304 180° SR Return Bends
SS 304 Fabricated Tees SS 304 Pipe Bends / Piggable Bends
SS 304 Reducers SS 304 Couplings
SS 304 Concentric Reducers SS 304 Pipe Nipples
SS 304 Eccentric Reducers SS 304 Forged/Plate Cut Rings
SS 304 3D Elbow SS 304 End Caps
SS 304 5D Elbow SS 304 Forged / Plate Circles

High Pressure Forged 304/304L Pipe Fittings

Threaded and Socket Weld Pipe Fittings

Products Size
SS 304 90° Elbows SS 304 Couplings

Sizes 1/8″ – 4″
Pressure Ratings –
2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS

SS 304 45° Elbows SS 304 Reducers
SS 304 Street Elbows SS 304 Inserts
SS 304 Tees SS 304 Caps
SS 304 Crosses SS 304 Unions

Stainless Steel 304/304L Flanges

Forged and Plate Flanges

Specification ASTM A182 / A240 & ASME SA182 / SA240
Grade 304, 304L, 304H, 304LN
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 304 Slip-On Flanges SS 304 Threaded Flanges

1/8″ – 36″

Raised Face or Flat Face

SS 304 Weld Neck Flanges SS 304 Socket Weld Flanges
SS 304 Blind Flanges SS 304 Reducing Flanges
SS 304 Lap Joint Flanges SS 304 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 METLINE, 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