UNS S21900 Flanges
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We produce UNS S21900 flanges,S21900 flanges,UNS S21900 Blind Flanges,UNS S21900 Welding Neck Flanges,UNS S21900 Slip On Flanges,UNS S21900 Socket Welding Flanges,UNS S21900 Lap joint Flanges,UNS S21900 Ring joint Flanges,UNS S21900 Slip-on flanges,UNS S21900 Weld Neck Flanges,UNS S21900 WN flanges,UNS S21900 LWN flanges, UNS S21900 Long weld neck flanges,UNS S21900 orifice flanges,UNS S21900 Spectacle blind Flanges,S21900 Spectacle flanges, S21900 spacer ring flanges,UNS S21900 Swivel Ring Flanges,UNS S21900 WNRF Flanges,UNS S21900 SORF Flanges,UNS S21900 SWRF Flanges,UNS S21900 Threaded Flanges,UNS S21900 Ring Type Joint Flanges,UNS S21900 BLRF Flanges,UNS S21900 RTJ Flanges from china

The size of UNS S21900 flanges that we could do is from 1/2” – 96”, DN15-DN2000

We could produce UNS S21900 flanges with pressre from 150LB-2500LB or PN6-PN100

The face of UNS S21900 flanges that we could do is in Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Also we could produce UNS S21900 flanges as per the drawing of the clients

Following is the standard of UNS S21900 flanges that we could do:

American standard of UNS S21900 flanges in ANSI B16.5 ;ASME B16.47 Series A(MSS SP-44);ASME B16.47 Series B(API 605);ANSI B16.1,AWWA C207

Germany standard of UNS S21900 flanges in DIN 2630,2620,2632,2633,2634,2635,2636,2637,2638,2501(WN);


British standard of UNS S21900 flanges in BS3293,BS4504,BS10

The Italy standard of S21900 flanges in UNI27676-67,UNI27677-67,UNI27678-67,UNI6083-67,UNI6084-67,,UNI6088-67,,UNI6089-67,UNI27699-67,,UNI2300-67,UNI27680-67,,UNI27681-67,,UNI27682-67,,UNI27683-67

Janpanese standard of UNS S21900 flanges in JIS B27620,

Korean Standard of UNS S21900 flanges in KSB 1503,KSB 6216,KSB 2332,KSB 2333,KSD 3578,KSD 4308.

Australian standard of UNS S21900 flanges in AS 4087,AS 2129,AS/NZS 4320.1

ISO standsard of UNS S21900 flanges in ISO 7005-1,ISO 9624

Russian standard of UNS S21900 flanges in GOST 12820,GOST 12821,GOST 12836,GOST 12820-80,GOST 12821-80,GOST 12836-80.

European standard of S21900 flanges in EN1092-1

South african standard of UNS S21900 flanges in SABS-1123/SANS-1123

As per surface treatment of S21900 flange, we could do Anti-rust Oil;Black /Yellow Paint;Hot-dipped Galvanization as per the requirement of the clients

The material grade of S21900 flanges is by forging as per the standard of ASTM B462.

We will do following testing to control the quality of UNS S21900 Flanges:Chemical Analysis,Corrosion Test,Tensile, Hardness, Flattening, Flare, Flange and Reverse-bend tests,Eddy Current Testing,Hydrostatic Testing,Air under Press Test,IGC Test (Inter Granular Corrosion Test),Micro-Structure Analysis,Radiography Test,Ultrasonic Test,Liquid Penetrate Test

We could do solution treatment, ageing treatment for UNS S21900 flanges as per the requirement of the clients

UNS S21900 combines high strength in the annealed condition, excellent resistance to oxidation at high temperatures as well as good resistance to lead oxide and a high level of corrosion resistance at ambient temperatures.

The chemical composition of UNS S21900 flanges is as follows

Chemical Composition Limits













UNS S21900

0.04 max

0.060 max

1.00 max




0.030 max



0.75 max

0.75 max

The mechanical property of UNS S21900 flanges is as follows


Cross Section Size

Test Direction

Yield Strength 0.2%

Ultimate Tensile Strength

Elongation in 2"(%)

Reduction of Area %

Rockwell B Hardness



UNS S21900

6" (152mm) sq






We could supply material certificate of UNS S21900 flanges  as per the standard of EN10204-3.1 or EN10204-3.2 of third party(like TUV,DNV,GL and so on)

Our UNS S21900 flanges will be 100% Ultrasonic Inspection as per the forging parts UT Test standard of ASTM A 388 or EN102768.

Our UNS S21900 flanges are widely used in many industries,such as heat exchangers,air receivers,pressure vessels,Stripper columns, separators, splitter, columns, hydro treaters, hydro crackers, desalters,shipping building and Aviation,drilling stations, pipelines and refineries,processing units,mechanical equipment, crystalizer equipment,Offshore and onshore industry, such as subsea and deepwater offshore oil production systems, industrial air compressors, power generators and nitrogen generators and so on,

Ask for our Delivery Guarantee for our S21900 flanges, and we will offer a cumulative rebate of 1% for the 1st week late, 2% for the 2nd week late, etc., to a maximum of 10%. For example, a 3 week late delivery will yield a rebate of 6%. We are so sure our long delivery will be on time, we back it up with a financial guarantee.

In order to export our UNS S21900 Flanges, we will do Packing in  No Fumigate or Fumigate Plywood/Wood Pallet or Case as per the requirement of our clients

Please send us the drawing of UNS S21900 flanges, we are glad to quote the best price for your side.

Except UNS S21900 flanges,we also could produce UNS S21900 bars,UNS S21900 plates,UNS S21900 fastener,UNS S21900 bolts,UNS S21900 fittings,UNS S21900 pipes,UNS S21900 tubes,UNS S21900 springs