| Customization: | Available |
|---|---|
| Standard: | ANSI |
| Type: | Welding Flange |
|
Still deciding? Get samples of $ !
Order Sample
|
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
RFWN Flange (Raised Face Long Weld Neck Flange) are one of the most commonly used flange in the piping industry. They are easy to recognize with their long tapered hub that is matched to the wall thickness (bore) of the pipe.
Weld neck flange and long weldneck flange provide reinforcement in application requiring high pressure and during low and high pessure extremes. It also helps in low cycle fatigue caused by line expansion of other variable forces.
Weldneck flange bore is machined to match the ID of the pipe or fitting. This creates a smooth transition to and from the weld neck flange and prevents turbulence at the welding neck. Hence it is important to specify the pipe schedule at the time of buying a weld neck flange. Weldneck flange is welded to pipe with full penetration weld and provides excellent stress distribution through tapered neck. Weld is also routinely radiographed or UT examined in critical applications.
Weld neck flange is available in both raised face and flat face configuration. Most common weld neck flanges have standard bore or extra heavy bore. Sch 120 or Sch 160 bore flanges, in heavier weights such as 600# to 1500# are also common in weld neck flange.
Mingda sells all kinds of weld neck flange in A105, A105N, Stainless Steel, Duplex and Super Duplex Steels and Nickel Alloys.
| Long Weld Neck Flange Materials |
Carbon Steel: ASTM A105,ASTM A350 LF1, LF2, CL1/CL2, A234, S235JRG2, P245GH P250GH, P280GHM 16MN, 20MN ,20# ,etc. |
Low Temp Carbon steel (A350 LF2 ,A350 LF3) |
|
Stainless Steel: ASTM A182, F304/304L, F316/316L |
|
Duplex stainless steel (A182 F51/UNS 31803 , F53/UNS 32750, F55) |
|
Low alloy steel (A182 F1, F5,F9,F11, F12, F22) |
|
| steel flange Standard |
ANSI/ASME/ASA B16.5 FLANGES, ANSI B16.47 A/B FLANGES |
JIS B 2220 FLANGES, KS B 1503, DIN SERIES, UNI, EN1092-1, BS4504 |
|
BS 10 TABLE D/E/F FLANGES, SANS 1123 FLANGES/SABS 1123 |
|
GOST12820-80/GOST12821-80, NFE29203/NS/AS/ISO/AWWA FLANGES |
|
| steel flange Types |
Plate/Blind/Slip-On/Weld-Neck/Blade/Threaded/Socket-Weld/Lap-Jiont/Figure-8 Blanks/Orifice |
Back- up Ring /Red Blind/ Paddle Blind |
|
Client's Flange/Special Flange |
|
| steel flange Pressure |
150LBS, 300,600,900,1500,2500 ANSI, ASA B16.5 |
PN6 PN10 PN16 PN25 PN40 PN64-DIN/UNI |
|
PN6 PN10 PN16 PN25 PN40 PN63-EN1092-1/BS4504 |
|
PN0.6Pa, PN1.0Pa, PN1.6. PN2.5,PN4.0-GOST12820-80 |
|
PN0.6Pa, PN1.0Pa, PN1.6. PN2.5,PN4.0, PN6.3. -GOST12821-80 |
|
600kPa, 1000.1600.2500.4000.-SANS 1123 |
|
5KG, 10KG, 16KG, 20KG, 30KG, 40KG-JIS B2220/KS B1503 |
|
TABLE D, TABLE E ,TABLE F-BS 10, AS2129 |
|
CLASS D, CLASS E, CALSS F, AWWA C207 |
|
steel flange Surface |
Rust Preventing Oil/ Antirust Oil |
Black/Yellow/Golden Coating (Water-Based Paint) Varnish Paint Coating Varnish Oil Coating |
|
Electro Galvanizing Coating (Cold Galvanizing, Color Golden or silvery white) Hot Dip Galvanizing |
|
| flange Technique |
Forging |
Heat Treatment: Annealing Quenching and tempering Precipitation/Selective/Case Harding |
|
Certification |
ISO ,TUV,AD |
Application |
Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry |
Products show 
){kind=link}