E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Plate type flat welding flange (chemical standard HG20592, national standard GB/T9119, mechanical standard JB/T81): convenient material acquisition, simple manufacturing, low cost, and wide use
But poor rigidity, so it should not be used in chemical process piping systems with supply and demand, flammable, explosive and high vacuum requirements, and highly and extremely hazardous occasions. The sealing surface types are flat and raised.
Material: 201, 304.316.316L.0Cr18Ni9.321.202, carbon steel, 20#, 20G, and alloy steel, etc.
Dimensions: The dimensions of plate type flat welding flanges vary according to different pressure levels and specifications.
Description
Plate type flat welding flange is the most common flange, with pressures of PN2.5, PN6, PN10, PN16, and PN25.
Welding form: Plate type flat welding flange is to insert the pipe into the flange for welding.
Material of flat welding flange: 201, 304.316.316L.0Cr18Ni9.321.202, carbon steel, 20#, 20G, and alloy steel, etc.
Material
The materials of plate-type flat welding flanges include forged steel, WCB carbon steel, stainless steel, 316L, 316, 304L, 304, 321, chrome-molybdenum steel, chrome-molybdenum-vanadium steel, molybdenum-titanium, rubber lining, and fluorine lining. The selection of these materials is based on different application requirements, including but not limited to industrial furnaces, thermal engineering, water supply and drainage, heating and ventilation, and automatic control.
Usage Instructions
Because plate flat welding flange has good comprehensive performance, it is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other basic projects.
Technical Data Sheet
Material: Common materials for plate-type flat-weld flanges include carbon steel, stainless steel and alloy steel. Carbon steel materials include ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, etc. Stainless steel materials include ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8, etc. Alloy steel materials include ASTM A182 F1, F***, F9, F11, F12, F22, F91, etc.
Size range: Plate slip-on flanges have a wide range of sizes, with flange outer diameters ranging from 75mm to 2190mm, flange inner diameters from A18mm to 2036mm, and B15mm to 2024mm. Pipe outer diameters from A17.2mm to 2032mm, and B14mm to 2020mm. Bolt hole center distances range from 50mm to 2130mm, and bolt hole diameters from 11mm to 30mm. Flange thickness ranges from 12mm to 58mm.
Pressure rating: Plate slip-on flanges have pressure ratings of full-plane (FF) PN2.5 (DN10 to DN2000), PN6 to PN16 (DN10 to DN600).
These technical parameters provide an important reference for the design and application of plate slip-on flanges, ensuring their applicability and safety in various industrial applications.
Technical Parameters
| Flange outer diameter | 75mm-2190mm |
| Bolt hole center circle diameter | 50mm----2130mm |
| Bolt hole diameter | 11mm-30mm |
| Number of bolt holes | 4-48 |
| Thread | M10-M27 |
| Flange thickness | 12mm-58mm |
| Pipe outer diameter | A(17. 2-2032MM) B(14-2020MM ) |
| Flange inner diameter | A(18-2036MM ) B(15-2024MM) |
| Flange theoretical weight | 0.36kg--234.6kg（DN1800） |
| Flange pressure | 0.25MPA－4.0MPA |
Related Products
Collaborative Case
GAE and Our Journey of Cooperation
The customer needs to develop a mining project and solve the flange problem in the mining project to avoid the flange or lack of flanges. It is necessary to purchase large-size stainless steel flanges.
FAQ
What certifications do your products have?
Our products comply with international standards such as ASTM, ANSI, JIS, DIN, and GB. We also hold various certifications to assure quality and reliability, including ISO 9001.
How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru, USA, Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.)
Get Quote
Have questions or need a custom solution? Reach out to us!
Our team at Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
Latest News
Industry News
Aug. 07, 2026
Advantages of seamless carbon steel elbows
The raw material for seamless carbon steel elbows is seamless steel pipe. The main production process involves heating and piercing a round tube billet, then rolling it using three-roll cross rolling, continuous rolling, or extrusion to set (or reduce) the outer diameter of the pipe. After cooling, it is straightened. It undergoes direct hydrostatic testing (or flaw detection), is marked, and then stored. Schxx represents the wall thickness grade; 180e (S) indicates a short-radius 180° carbon steel elbow, and 180e (L) indicates a long-radius 180° elbow; 90E (S) indicates a short-radius 90° carbon steel elbow, and 90e (L) indicates a long-radius 90° elbow; 45
Industry News
Aug. 05, 2026
180° carbon steel pipe elbow manufacturing process
The most common manufacturing process for carbon steel pipe bends is hot forming. Hot forming is divided into two types: hot push bending and hot heating bending. Our 180° carbon steel pipe bends are manufactured using the hot push process. The process flow diagram is shown below.
Industry News
Aug. 03, 2026
What are the advantages of using sliding flanges?
A sliding flange is a type of slip-on flange. Slip-on welding involves welding only the outer layer, not the inner layer. Slip-on flanges are typically used for medium- and low-pressure pipelines with a nominal pressure less than 2.5 MPa. There are four types of sealing faces for slip-on flanges: flat face, raised face (RF), FM/M, and tongue and groove (TG). Flat face is the most widely used and the cheapest. A sliding flange is a slip-on flange with a short neck. Carbon steel sliding flanges, or SO flanges, are generally cheaper than welded neck flanges, which is why customers often choose sliding flanges. As the name suggests, a sliding flange fits over a
You Can Contact Us in the Following Ways
authentic013@steelpipes-fitting.com
+86 13668807131
Donghe Industrial Zone, Mengcun County, Cangzhou City, Hebei Province
Get Quote
At Authentic, we understand that every project has unique requirements. Our dedicated team is here to provide you with a customized quote tailored to your specific needs. By filling out the form below, you’ll receive competitive pricing, high-quality product details, and estimated delivery times.
中文
Русский
Español
عربي
