Basic Info.
Standard
ANSI, DIN, GB, JIS, GOST, BSW
Sealing Surface
FF, RF, FM, Rj,Tg,Mfm
Manufacturing Way
Forging
Pressure
150# 300# 400# 600# 900# 1500# 2500#
Usage
Suitable for Water, Oil and Gas Industrial
Connection Endstsocket Weld or Threaded
NPT, Bsp, BSPT etc
Factory
Over 30 Years Experience
Transport Package
Customized
Product Description
Product Description
Flat welding flange is a flange connected with container or pipeline by fillet weld. It is an arbitrary type flange.
1. According to the degree of integrity of the connection between the flange ring and the straight cylinder section, the flange is checked separately according to the integral type or loose type.
2. Flange rings are available with neck and without neck. Compared with the welding neck flange, the flat welding flange has simple structure and saves materials, but its stiffness and sealing are not as good as the neck welding flange.
3. Flat welded flange is widely used in the connection of medium and low pressure vessels and pipelines
Key Features:
1. The flat welding flange not only saves space and reduces weight, but also ensures that the joint will not leak and has good sealing performance.
2. The compact flange size is reduced because the diameter of the seal is reduced, which will reduce the cross section of the sealing surface.
3. The flange gasket has been replaced by a sealing ring to ensure that the sealing face matches the sealing face. In this way, only a small amount of pressure is needed to compress the cover tightly. With the reduction of the required pressure, the size and number of bolts can be reduced accordingly, so the final design of a small size and light weight (compared with the traditional flange weight reduction of 70% ~ 80%) of the new product.
Standard Specification:
Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size: 1/2" (15 NB) to 48" (1200NB)
Class: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
BS: BS4504 , BS4504, BS1560, BS10
Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Material: Stainless Steel, Carbon Steel, Low-Temperature Carbon Steel, Alloy Steel, ECT.
Surface treatment: Anti-rust oil, transparent/yellow/black, Anti-rust paint, Zinc, Hot dipped galvanized
Usage: Oil field, Offshore, Water system, Shipbuilding, Natural gas, Electric power, Pipe projects, etc.
| Pipe | Flange theoretical weight (kg) | Single head bolt configuration | Configuration of nut |
| Nominal diameter | Outer diameter | Pipe pressure | 0.6MPa | 1.0MPa | 1.6MPa | 2.5MPa | Hexagon nut (crude) GB41-76 | Hexagon nut GB52-76 |
| 0.6MPa | 1.0MPa | 1.6MPa | 2.5MPa | Qty * Dia * L | Weight (kg) | Qty * Dia * L | Weight (kg) | Qty * Dia * L | Weight (kg) | Qty * Dia * L | Weight (kg) | Qty * Dia * L | Weight (kg) | Qty * Dia * L | Weight (kg) |
| 10 | 14 | 0.313 | 0.458 | 0.547 | 0.634 | 4*10*40 | 0.14008 | 4*12*40 | 0.19716 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 1000*6*5 | 2.32 | 1000*1.6*5 | 0.075 |
| 15 | 18 | 0.335 | 0.511 | 0.711 | 0.804 | 4*10*40 | 0.14008 | 4*12*40 | 0.19716 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 1000*8*5 | 5.67 | 1000*2*5 | 0.119 |
| 20 | 25 | 0.536 | 0.748 | 0.867 | 0.985 | 4*10*50 | 0.16472 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 4*12*60 | 0.2682 | 1000*10*5 | 10.99 | 1000*2.5*5 | 0.22 |
| 25 | 32 | 0.641 | 0.89 | 1.174 | 1.174 | 4*10*50 | 0.16472 | 4*12*50 | 0.23268 | 4*12*60 | 0.2682 | 4*12*60 | 0.2682 | 1000*12*5 | 16.32 | 1000*3*5 | 0.393 |
| 32 | 38 | 1.097 | 1.4 | 1.6 | 1.96 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 1000*14*5 | 25.28 | 1000*4*5 | 0.844 |
| 40 | 45 | 1.219 | 1.71 | 2 | 2.6 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 1000*16*5 | 34.12 | 1000*5*5 | 1.24 |
| 50 | 57 | 1.348 | 2.09 | 2.61 | 2.71 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 4*16*70 | 0.5516 | 1000*18*5 | 44.19 | 1000*6*5 | 2.317 |
| 65 | 73 | 1.67 | 2.84 | 3.45 | 3.22 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 8*16*70 | 1.1032 | 1000*20*5 | 61.91 | 1000*8*5 | 5.674 |
| 80 | 89 | 2.48 | 3.24 | 3.71 | 4.06 | 4*10*60 | 0.18936 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 1000*22*5 | 75.94 | 1000*10*5 | 10.99 |
| 100 | 108 | 2.89 | 4.01 | 4.8 | 6 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 8*20*80 | 2.0368 | 1000*24*5 | 111.9 | 1000*12*5 | 16.32 |
| 125 | 133 | 3.94 | 5.4 | 6.47 | 8.26 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 8*22*90 | 2.7152 | 1000*27*5 | 168 | 1000*14*5 | 25.28 |
| 150 | 159 | 4.47 | 6.12 | 7.92 | 10.4 | 8*16*60 | 0.9768 | 8*20*80 | 2.0368 | 8*20*80 | 2.0368 | 8*22*90 | 2.7152 | 1000*30*5 | 234.2 | 1000*16*5 | 34.12 |
| 175 | 194 | 5.54 | 7.44 | 8.81 | 11.9 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 8*20*80 | 2.0368 | 12*22*100 | 4.4304 | 1000*36*5 | 370.9 | 1000*18*5 | 44.19 |
| 200 | 219 | 6.07 | 8.24 | 10.1 | 14.5 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 12*20*90 | 3.3504 | 12*22*100 | 4.4304 | 1000*42*5 | 598.6 | 1000*20*5 | 61.91 |
| 225 | 245 | 6.6 | 9.3 | 11.7 | 17 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 12*20*90 | 3.3504 | 12*27*100 | 7.3116 | 1000*48*5 | 957.3 | 1000*22*5 | 75.94 |
| 250 | 273 | 8.03 | 10.7 | 15.7 | 19.9 | 12*16*70 | 1.6548 | 12*20*80 | 3.0552 | 12*22*90 | 4.0728 | 12*27*100 | 7.3116 | 1000*56*5 | 1420 | 1000*24*5 | 111.9 |
| 300 | 325 | 10.3 | 12.9 | 18.1 | 26.8 | 12*20*80 | 3.0552 | 12*20*80 | 3.0552 | 12*22*90 | 4.0728 | 16*27*110 | 10.4688 | 1000*64*5 | 1912 | 1000*27*5 | 168 |
| 350 | 377 | 12.59 | 15.9 | 23.3 | 34.35 | 12*20*80 | 3.0552 | 16*22*90 | 5.4304 | 16*22*100 | 5.9072 | 16*30*120 | 14.0048 | 1000*72*5 | 2584 | 1000*30*5 | 234.2 |
| 400 | 426 | 15.2 | 21.8 | 31 | 44.9 | 16*20*80 | 4.0736 | 16*22*90 | 5.4304 | 16*27*110 | 10.4688 | 16*30*130 | 14.8928 | 1000*80*5 | 3393 | 1000*36*5 | 370.9 |
| 450 | 478 | 17.59 | 24.4 | 40.2 | 51.92 | 16*20*80 | 4.0736 | 20*22*90 | 6.788 | 20*27*120 | 13.986 | 20*30*130 | 18.616 | 1000*90*5 | 4872 | 1000*42*5 | 598.6 |
| 500 | 529 | 20.67 | 27.7 | 55.1 | 67.3 | 16*20*90 | 4.4672 | 20*22*90 | 6.788 | 20*30*130 | 18.616 | 20*36*150 | 31.32 | 1000*100*5 | 6732 | 1000*48*5 | 957.3 |
| 600 | 630 | 26.57 | 39.4 | 80.3 | - | 20*20*90 | 5.584 | 20*27*110 | 13.086 | 20*36*140 | 29.72 | - |
The manufacturing process of
forged flanges begins with the selection of high-quality steel, which is heated and shaped under high pressure in forging dies to enhance its strength and durability. After forging, the flanges are trimmed, heat-treated to relieve internal stresses, and precisely machined to meet the required dimensions. They undergo rigorous inspection and testing for quality assurance, followed by surface treatments for enhanced corrosion resistance. This process results in flanges that are strong, reliable, and suitable for demanding industrial environments.
Company Profile
Dingxiang Country Gu Cheng Forging Company Ltd. is a leading manufacturer in Dingxiang County, Shanxi Province, known as the "Forging Capital of China." Established with a deep-rooted history in forging, we specialize in producing high-quality flanges and forged components for a wide range of industrial applications. Our extensive product line includes ANSI, DIN, JIS, and EN standard flanges and customized forged parts designed to meet specific customer requirements.
Gu Cheng Forging with over 30 years of experience in producing high-quality forged flanges. Including Weld Neck Flange (WN), Slip-On Flange (SO), Blind Flange (BL), Socket Weld Flange (SW), Lap Joint Flange, Plate Flange, and Customized forged flange.
At Gu Cheng Forging, we serve a global market, providing flanges and forged components for industries such as oil and gas, chemical processing, power generation, shipbuilding, and more. We pride ourselves on our ability to deliver tailored solutions, meeting the highest standard of safety, performance, and efficiency.
As a factory, we can tailor flanges based on your specific requirements for size, material, pressure rating, and surface treatment (galvanization, black paint, etc.). By preventing rust and deterioration, the coating enhances the flange's performance, offering long-term resilience and reducing maintenance needs over time.
Dingxiang Country Gu Cheng Forging Company Ltd, strives to be a trusted partner for all your forging needs, ensuring long-term cooperation and mutual success.
Q1: Are you a manufacturer or a trading company?
A1: We are a professional manufacturer with over 30 years of experience in forging flanges. Our factory is located in Dingxiang, China, known as the "Forging Capital." We produce high-quality, customized forged flanges, offering factory-direct pricing and ensuring top-notch quality.
Q2: What types of flanges do you produce?
A2: We manufacture a wide range of forged flanges, including:
- Weld Neck Flange (WN)
- Slip-On Flange (SO)
- Blind Flange (BL)
- Socket Weld Flange (SW)
- Threaded Flange (TH)
- Lap Joint Flange
- Plate Flange
All our flanges comply with international standards such as ASME, DIN, JIS, and BS.Q3: What materials do you use?
A3: We offer flanges in a variety of materials, including:- Carbon Steel
- Stainless Steel
- Alloy Steel
Each material is sourced from certified suppliers, ensuring durability and performance in diverse industrial applications.
Q4: Can you provide customized flanges?
A4: Absolutely! As a factory, we specialize in customization. We can tailor flanges based on your specific requirements for size, material, pressure rating, and surface treatment (galvanization, black paint, etc.).
Address:
Liuhui Industrial Zone, Nanwang Township, Dingxiang County, Xinzhou, Shanxi, China
Business Type:
Manufacturer/Factory
Business Range:
Manufacturing & Processing Machinery
Management System Certification:
ISO 9001
Company Introduction:
Shanxi Dingxiang County Gucheng Forging Co., Ltd. is located in China's energy-heavy chemical industry base, Dingxiang County, the forging town northwest of Shanxi Province. The company's address is in the small industrial zone of Liuhui, Hanyang Ancient City, close to Kushiro. Wutai Mountain, a Buddhist holy place, has convenient road and rail transportation, rich coal power resources, fast communication facilities, and excellent geographical conditions. The company was founded in 1996 with a registered capital of 5.01 million yuan, fixed assets of 18 million yuan, more than 200 workers, and an annual output of 100, 000-tons of strength.
The flanges produced by our company implement the national standard JB, HG, DG, and other standards, and implement the standards of American standard ANSI B16.5, German standard DIN, British standard BS4504, Japanese standard JIS, B2220, B2210, Italian standard UNI and so on. The main varieties are Welding, lap joint, socket, sliding sleeve, thread, blind plate, flat plate, and other seven varieties, 1/2"-64" with more than 20 kinds of specifications. The products meet the domestic petroleum, chemical, machinery, electric power, coal mining, and other industries, and are exported to Japan, South Korea, Canada, Southeast Asia, South America, Western Europe, and other countries and regions, winning the trust of customers at home and abroad.
In the future, the company will strengthen friendly cooperation with customers at home and abroad with a new attitude, adhere to the principle of mutual benefit and common development, and create a bright future. We warmly welcome customers from all walks of life to come and negotiate business.