Forged flanges

Forged Flanges

Forged Flanges are perfectly finished with precision using the latest machinery.

Forged steel flanges are made in seven primary ratings: Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500 & Class 2500

Product Specification and Size :

Standard Specification for Forged Flanges:

ASME B16.5, ASME B16.47

Size Available

NPS 1/2 ~ NPS 120 (DN 15 ~ DN 3000)

Pressure Rate

150LB, 300LB, 400LB, 600LB, 900LB, 1500LB, 2500LB

Material Available

  • A182 F1, F5, F9, F11, F22, F91
  • A105, A350 LF1/LF2/LF3, A694 F42/46/52/56/60/65/70
  • A182 F304/304L, F316/316L, F321, F321H, F317L, F310, F347


The above products are very competitive with superior quality and timely delivery. As one of the mass suppliers licensed by Sinopec Corp., the products have been supplied to many foreign engineering companies and clients such as Kvaerner, Toyo, Uhde, Rotary, Dow, DuPont, LG, BP, ConocoPhillips, Emerson, Shell, Bayer, Secco, etc.


Stainless steel or carbon steel forged flanges are used as a connection component for pipes, valves, pumps and other equipment form pipeline systems. Forged flanges are usually welded onto threaded pipes end and joined with bolts to make the connection.

The production process flow of forging flange

The process of forging process is composed of the following procedure, which is to select the high quality steel billet, heat, shape and forge to cool down. The forging process has a free forging, die forging, and tire forging.

Welding Neck Flange Wn Forged Stainless Steel Flange

In the production, press the mass of the forging parts, the quantity of the batch of different forging methods. Free forging productivity is low, processing surplus is large, but the tool is simple, universality is large, so it is widely…

Forging flange is a flange in mechanical performance is one of the best products, its raw material is commonly tube billet, and then after cutting to constantly pounding, to eliminate the segregation of steel ingot defects, osteoporosis, etc. Price and mechanical properties are higher than normal casting flanges. The flange is the part that connects the pipe to the pipe and the valve. It is also useful for flanges in the import and export of the equipment, which is used to connect the pipe to the pipe by connecting the pipe to the pipe. It’s an accessory accessory for the pipe. The forging flange is mainly made of carbon steel, alloy steel, stainless steel. The main criteria are national, electric, American, German, and Japanese. The main anticorrosion treatment is oily and galvanized.

Forged steel flanges are made in seven primary ratings:

  • ANSI B 16.5 Class 150 lb
  • ANSI B 16.5 Class 400 lb
  • ANSI B 16.5 Class 900 lb
  • ANSI B 16.5 Class 2500 lb
  • ANSI B 16.5 Class 300 lb
  • ANSI B 16.5 Class 600 lb
  • ANSI B 16.5 Class 1500 lb

Forged flange is the best mechanical properties of a flange product, its raw materials are generally tube, and then after cutting and then continue to beat, to eliminate the ingot in the segregation, loose and other defects. Price and mechanical properties are higher than ordinary casting flange a grade. The flange is a part that connects the pipe with the pipe and the valve, is connected to the pipe end. It is also used for the flange on the equipment inlet and outlet.

The connection between the two devices is the part connecting the pipe to the pipe. At the end of the tube. Is a subsidiary of the pipeline accessories products. Forging flange The main materials are carbon steel, alloy steel, stainless steel. The main criteria are GB, superscript, American Standard, German standard, the Japanese standard and so on.

The main anti-corrosion treatment is oil and galvanized. Forging flange pressure, temperature performance is better, generally applicable to high pressure and high temperature working environment.

Production Process of Forged Flange

forged flange process

The forging process is usually composed of the following processes, namely, the selection of quality steel billet, heating, forming and cooling. The forging process has a free forging, die forging, and tire forging. In the production, press the mass of the forging parts, the quantity of the batch of different forging methods.

It is widely used in forging simple pieces and small batches of forging parts. The free forging equipment is equipped with pneumatic hammer, steam air hammer and hydraulic press, which are suitable for the production of small and large forgings. High productivity, easy operation, easy mechanization and automation. The size of die forging is high, the machining allowance is small, and the fabric of the forging is more reasonable, which can further improve the service life of the parts.

The basic process of free forging: when forging, the shape of the forging is gradually forged through some basic deformation process. The basic process of forging and forging is upbold, long, piercing, bending and cutting.

Upset upsetting is the operation process that reduces the height of the raw material and increases the cross section. This process is used for forging gear billets and other disc shaped forgings. The heading is divided into full heading and partial forging.

The length of the shaft is increased by the length of the billet, the forging process of the reduction of the section is usually used to produce the spindle such as the lathe spindle, the connecting rod and so on.

  • The forging process of punching holes through holes or holes in the blank.
  • The forging process that bends the blank to a certain Angle or shape.
  • Twist the process of turning a part of the billet into a certain angle.
  • The forging process of cutting down the raw material or cutting head.
  • Second, the die forging

The die forging is known as the forging of the model, which is placed in the forging of the forging machine which is fixed on the die forging equipment.

The basic process of die forging: material, heating, pre-forging, finishing, finishing, cutting, trimming and blasting. The common technique is to upset, pull, bend, punch and form.

The commonly used die forging equipment has die forging hammer, hot die forging press, flat forging machine and friction press.

Generally speaking, the forging flange is of better quality, usually through die forging, the crystal structure is fine, the strength is high, and of course the price is more expensive.

Whether casting flange or forging flange are commonly used in manufacturing methods, see the need to use the strength of the components, if the requirements are not high, you can choose to turn the flange.

International Standards for Flanges

  • US Standards: ASME B16.5, ASME B16.47, ASME B16.48, ASME B16.36, AWWA C-207, MSS SP 44, API 605, API 6A.
  • DIN Standards: DIN 2527, DIN 2573, DIN 2576, DIN 2502, DIN 2503, DIN 2543, DIN 2544, DIN 2545, DIN 2630, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2628, DIN 2629, DIN 2627, DIN 2641, DIN 2642, DIN 2652, DIN 2653, DIN 2655, DIN 2656, DIN 2673, DIN 2674, DIN 2675, DIN 2676, DIN 2558, DIN 2561, DIN 2565, DIN 2566, DIN 2567, DIN 2568, DIN 2569, DIN 28115, DIN 86029, DIN 86030.
  • BS Standards: BS 4504, BS 10, BS 3293, BS EN 1092-1.
  • Italian Standards: UNI 2276, UNI 2277, UNI 2278, UNI 6083, UNI 6084, UNI 2280, UNI 2281, UNI 2282, UNI 2283, UNI 2284, UNI 2253, UNI 2254, UNI 6091, UNI 6092, UNI 6093, UNI 6094, UNI 6095, UNI 6088, UNI 6089, UNI 6090.
  • ISO Standards: ISO 9624, ISO 7005-1.
  • Australian Standards: AS/NZS 4331.1, AS 4087, AS 2129 Table D, Table E.
  • Norwegian Standards: NS 2545, NS 2546, NS 2547, NS 2525, NS 2526, NS 2527, NS 2529, NS 2537, NS 2538, NS 25239, NS 2542, NORSOK L-005.
  • Other Standards: GOST 12820-80, GOST 12821-80, MSZ flange, NFE 29203, VSM 18695, VSM 18696, VSM 18697, VSM 18716, VSM 18718, VSM 18703, JIS B2220, KS B1503, KS D4308, KS D3578, KS B2332, KS B2333, KS B6216, SABS/ SANS 1123.