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Carbon Steel Flanges, Alloy Steel Flanges, Stainless Steel Flanges Stockist, , Steel Flanges stockist , Flange Distributor , Forgings and Flange stockist


ANSI B16.5, A105 Carbon Steel Flanges, A350 Lf2 Alloy Steel Flanges stockist , Galvanized Flange stockist, ANSI or ASME Flange stockist, DIN Standard Flange stockist


Hot Dip Galvanised, Blackodised Flanges – Ansi Flange, Din Flanges, Forged Flanges Stockholder, Stainless Steel Flange stockist, Alloy Steel Flange stockist, Mild Steel & Carbon Steel Flange stockist



Pipe Flanges stockist
Pipe Flanges

An ISO 9001:2015 Certified Company,Cromwell Distribution is a leading Stockist of industrial forged flanges (A-182, ANSI B16.5) and plate flanges (A-240, ANSI B16.5) . The flanges are Stockistsin a range of pressure ratings to meet customer specifications. Slip-On flange, Weld-Neck flange and Lap-Joint Flange are three of the most popular types of flanges by us, with Threaded flange and Blind Flange also supplied to order.

We specialise in stockists a comprehensive range of carbon steel flanges,alloy steel flanges and stainless steel flanges from ½”NB to 48”NB. Steel flanges are widely used as connectors in piping systems to connect pipes to pipes, tees, reducers, elbows, valves and other piping equipments.

Other special large diameter flanges can also be supplied on customer demand. We stock many standard size large diameter slip-on flanges, blind flanges and weld neck flanges in 304/304L, 316/316L and also A-105 – carbon steel. Steel flanges are widely used in various industries including power generation, oil and gas transportation, petrochemical plants, refineries, waste water treatment plants, marine and pharmaceuticals plants among others. We can offer carbon steel and alloy steel flanges with electro-galvanized coating and blackodising finish. Our flange products are supplied with EN 10204 3.1 Test Certification, with complete details on the chemical and physical properties of the materials. They are permanently marked with size, schedule, grade, and heat code.


What is Pipe Flanges ?

A flange is type of fitting used to connect pipes, valves, pumps and other equipment to form a piping system. A flanged joint involves three separate components; the flanges, the gaskets, and the bolting. One of the most important advantage of using a flange is that it allows more flexibility in maintenance.

The various types of flanges include: Weld neck Flanges (WNRF), Slip-on Flanges (SORF), Blind Flanges (BLRF), Lap Joint Flanges, (SOLJ), Socket-weld Flanges (SWRF), Screwed (Threaded) Flanges, Long weld neck Flanges (LWNRF), Spectacle Blind Flanges, Spacer & Blind Flanges, Ring Type Joint Flanges (RTJ), Reducing Flanges, Raised Face (RF) Flanges, Orifice Flanges, Large Diameter Flanges, Custom Flanges, Drawing Flanges, Forged Flanges, Plate Flanges, Flat Face Flanges, etc.


Steel Flanges Specification


Steel Flange Production Range – ANSI / ASME Flanges

Size 1/2″ (15 NB) to 48″ (1200NB)
Standards ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Pressure Ratings Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Types of Flanges Weld neck Flanges (WNRF), Slip-on Flanges (SORF), Blind Flanges (BLRF), Lap Joint Flanges
(SOLJ), Socket-weld Flanges (SWRF), Screwed (Threaded) Flanges, Long weld neck Flanges (LWNRF), Spectacle Blind Flanges, Spacer & Blind Flanges, Ring Type Joint Flanges (RTJ), Reducing Flanges, Raised Face (RF) Flanges, Orifice Flanges, Large Diameter Flanges, Custom Flanges, Drawing Flanges, Forged Flanges, Plate Flanges, Flat Face Flanges, etc.
Carbon Steel Flanges ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Stainless Steel Flanges ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Flanges Duplex, Super Duplex, Nickel Alloys
Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Coating/Surface Treatment Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Value Added Services CNC Machining, Customised Flanges

Steel Flanges – Standards

ASME: ANSI B16.9, ANSI B16.28, MSS-SP-43

DIN: DIN2605, DIN2615, DIN2616, DIN2617, DIN28011

EN: EN10253-1, EN10253-2


Steel Pipe Flanges Materials Grades

Stainless Steel Flanges: ASTM A403 WP 304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904L/2205

Carbon Steel Flanges: ASTM A234 WPB / A420 WPL3/ A420 WPL6/ MSS-SP-75 WPHY 42/46/52/56/60/65/70

Alloy Steel Flanges: ASTM A234 WP1/ WP5/ WP9/ WP11/ WP22/ WP91

Other Materials: Monel, Nickel, Inconel, Hastelloy, Copper, Brass, Bronze, Titanium, Tantalum, Bismuth, Aluminium, Zinc, Lead, etc.

Copper Nickel Flanges: CuNi10Fe1Mn, CuNi30Mn1Fe



Types of Steel Pipe Flanges



Pipe Flanges Dimensions


Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Flange Length RF Dia. RF Height PCD Socket Bore No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H
1/2 15 90 9.6 30 14 34.9 2 60.3 22.2 4 1/2 50 55 5/8 M14 0.8
3/4 20 100 11.2 38 14 42.9 2 69.9 27.7 4 1/2 50 65 5/8 M14 0.9
1 25 110 12.7 49 16 50.8 2 79.4 34.5 4 1/2 55 65 5/8 M14 0.9
1 1/4 32 115 14.3 59 19 63.5 2 88.9 43.2 4 1/2 55 70 5/8 M14 1.4
1 1/2 40 125 15.9 65 21 73 2 98.4 49.5 4 1/2 65 70 5/8 M14 1.4
2 50 150 17.5 78 24 92.1 2 120.7 61.9 4 5/8 70 85 3/4 M16 2.3
2 1/2 65 180 20.7 90 27 104.8 2 139.7 74.6 4 5/8 75 90 3/4 M16 3.2
3 80 190 22.3 108 29 127 2 152.4 90.7 4 5/8 75 90 3/4 M16 3.7
3 1/2 90 215 22.3 122 30 139.7 2 177.8 103.4 8 5/8 75 90 3/4 M16 5
4 100 230 22.3 135 32 157.2 2 190.5 116.1 8 5/8 75 90 3/4 M16 5.9
5 125 255 22.3 164 35 185.7 2 215.9 143.8 8 3/4 85 95 7/8 M20 6.8
6 150 280 23.9 192 38 215.9 2 241.3 170.7 8 3/4 85 100 7/8 M20 8.6
8 200 345 27 246 43 269.9 2 298.5 221.5 8 3/4 90 110 7/8 M20 13.7
10 250 405 28.6 305 48 323.8 2 362 276.2 12 7/8 100 115 1 M24 19.5
12 300 485 30.2 365 54 381 2 431.8 327 12 7/8 100 120 1 M24 29
14 350 535 33.4 400 56 412.8 2 476.3 359.2 12 1 115 135 1 1/8 M27 41
16 400 595 35 457 62 469.9 2 539.8 410.5 16 1 115 135 1 1/8 M27 54
18 450 635 38.1 505 67 533.4 2 577.9 461.8 16 1 1/8 125 145 1 1/4 M30 59
20 500 700 41.3 559 71 584.2 2 635 513.1 20 1 1/8 140 160 1 1/4 M30 75
24 600 815 46.1 663 81 692.2 2 749.3 616 20 1 1/4 150 170 1 3/8 M33 100

Steel Pipe Flanges - Marking & Packing

Products are packaged to ensure that there is no damage during transit. packaging is done in wooden cases. All Pipe 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.


Steel Flanges - Value Added Services


  • Hot Dipped Galvanizing
  • Epoxy & FBE Coating
  • Electro Polish

Pipe Flange - Quality Assurance

At Cromwell Distribution, all 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.


Contact Cromwell Distribution for best offer of Steel Pipe Flanges
Call: (361) 510-2964
Emailsales@cromwelldistribution.com