Hotline：
Butt welding flanges are not easily deformed, well sealed, and widely used, with corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition. The distance between the welding junction and the joint surface is large, and the joint surface is free from welding temperature deformation. It adopts a relatively complex horn shaped structure, suitable for pipelines with significant pressure or temperature fluctuations or pipelines with high, high, and low temperatures. It is generally used for the connection of pipelines and valves with PN greater than 2.5MPa; It is also used on pipelines that transport expensive, flammable, and explosive media.
Production process
Forging, casting, medium plate turning
Flat welding flange
Connection form: single sided welding, double sided nut connection.
The product features beautiful appearance, smooth surface, acid and alkali resistance, corrosion resistance, and strong texture performance. Production process, oxygen furnace cutting, overall forging or finished product forging and cutting forming.
The processing method is high-precision CNC lathe turning and CNC rocker drilling.
Product parameters
(1) Bolt hole center circle diameter: 50mm -2130mm (2) Bolt hole diameter: 11mm-30mm
(3) Flange thickness: 12mm-58mm
(4) Outer diameter of pipe: A (17.2-2032MM) B (14-2020MM) (5) Inner diameter of flange: A (18-2036MM) B (15-2024MM) (6) Theoretical weight of flange: 0.36kg --234.6kg (DN1800)
Production standards
Common production standards:
Ministry of Chemical Industry Standards HG/T20592-2009, HG/T20615-2009, National Standards GB/T9115.1-2000, GB/T9115.2-2000, GB/T9115.3-2000, GB/T9115.4-2000, Ministry of Machinery Standards JB/T86.2-94, Marine Standards CB/T47-1999 Production Materials WCB (carbon steel), LCB (low-temperature carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% chromium 0.5% molybdenum steel), WC9 (2.25% chromium), C5 (5% chromium% molybdenum), C12 (9% chromium 1% molybdenum), CA6NM (4% chromium steel), CA15 (4) (12% chromium), CF8M (316 stainless steel) CF8C (347 stainless steel), CF8 (304 stainless steel), CF3 (304L stainless steel), CF3M (316L stainless steel), CN7M (alloy steel), M35-1 (Monel), N7M (Hastelloy B), CW6M (Hastur C). CY40 (Inconel)