Hebei Shengtian Pipe Fittings Group Co., Ltd.
Hebei Shengtian Pipe Fittings Group Co.,Ltd. Base on China,Service the world
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GOST 12821-80 900lbs 316 Stainless Steel Forged Weld Neck Flange
These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.
A weld neck flange is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.
Flange technical parameters:
| Welding neck | Slip on | Blind | LWN(Long welding neck) | |
| Lap joint | Socket welding | Threaded | Plate flange/Flat flange | |
| Orifice flange | Anchor flange | Forgings | Spectacle Blind (spade and spacer) | |
| Standards | ||||
| GOST12821-80 DN10-DN3600 | GOST12820-80 DN10-DN3600 | |||
| GOST12836-80 DN10-DN3600 | AWWA C207 4"-120" | |||
| ANSI B16.5 1/2"-24" | ANSI B16.47 "A"(MSS SP44) 26"-60" | |||
| EN1092-1 1/2"-80" | ANSI B16.47 "B"(API 605) 26"-60" | |||
| BS 3293 26"-48" | B16.36 1"-120" | |||
| DIN2630-2637 1/2"-80" | BS4504 1/2"-80" | |||
| JIS B2220 1/2"-60" | KS B1503 1/2"-60" | |||
| API 590/B16.48 1/2"-24" | ||||
| Material | ||||
| Carbon steel( A105,20#, 16Mn, A266 CL2/CL4, ST37.2, C22.8, S235JR , S355JR ) | ||||
| Plate material(A515 Gr60/70, A516 Gr60/70, A285GrA B C, A240 304/ 316) | ||||
| High Yield Carbon steel (A694 F42/F46/F52/F56/F60/F65/F70) | ||||
| Low Temp Carbon steel (A350 LF2 , A350 LF3) | ||||
| Stainless steel (A182 F304/L, F304H, F316/L, F321,316Ti) | ||||
| Low alloy steel (A182 F5,F9,F11 , F22) | ||||
| Duplex stainless steel (A182 F51/UNS 31803 , F53/UNS 32750, F55) | ||||
| Surface Transparent anti rust oil, yellow anti rust oil, black paint, or acc. to clients request | ||||
| Package Plastic film, wooden cases ,wooden pallet or on customers' request | ||||
| Advantages | ||||
| 1. Factory direct sales - fast supply capacity | ||||
| 2.Reasonable price and excellent quality | ||||
| 3.Have their own Off Shore Company with import and export rights to facilitate customer transaction | ||||
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