UNS S21800 Flanges
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We produce UNS S21800 flanges,S21800 flanges,UNS S21800 Blind Flanges,UNS S21800 Welding Neck Flanges,UNS S21800 Slip On Flanges,UNS S21800 Socket Welding Flanges,UNS S21800 Lap joint Flanges,UNS S21800 Ring joint Flanges,UNS S21800 Slip-on flanges,UNS S21800 Weld Neck Flanges,UNS S21800 WN flanges,UNS S21800 LWN flanges, UNS S21800 Long weld neck flanges,UNS S21800 orifice flanges,UNS S21800 Spectacle blind Flanges,S21800 Spectacle flanges, S21800 spacer ring flanges,UNS S21800 Swivel Ring Flanges,UNS S21800 WNRF Flanges,UNS S21800 SORF Flanges,UNS S21800 SWRF Flanges,UNS S21800 Threaded Flanges,UNS S21800 Ring Type Joint Flanges,UNS S21800 BLRF Flanges,UNS S21800 RTJ Flanges from china

The size of UNS S21800 flanges that we could do is from 1/2” – 96”, DN15-DN2000

We could produce UNS S21800 flanges with pressre from 150LB-2500LB or PN6-PN100

The face of UNS S21800 flanges that we could do is in Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Also we could produce UNS S21800 flanges as per the drawing of the clients

Following is the standard of UNS S21800 flanges that we could do:

American standard of UNS S21800 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 S21800 flanges in DIN 2630,2620,2632,2633,2634,2635,2636,2637,2638,2501(WN);


British standard of UNS S21800 flanges in BS3293,BS4504,BS10

The Italy standard of S21800 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 S21800 flanges in JIS B27620,

Korean Standard of UNS S21800 flanges in KSB 1503,KSB 6216,KSB 2332,KSB 2333,KSD 3578,KSD 4308.

Australian standard of UNS S21800 flanges in AS 4087,AS 2129,AS/NZS 4320.1

ISO standsard of UNS S21800 flanges in ISO 7005-1,ISO 9624

Russian standard of UNS S21800 flanges in GOST 12820,GOST 12821,GOST 12836,GOST 12820-80,GOST 12821-80,GOST 12836-80.

European standard of S21800 flanges in EN1092-1

South african standard of UNS S21800 flanges in SABS-1123/SANS-1123

As per surface treatment of S21800 flange, we could do Anti-rust Oil;Black /Yellow Paint;Hot-dipped Galvanization as per the requirement of the clients

The material grade of S21800 flanges is by forging as per the standard of ASTM B462.

We will do following testing to control the quality of UNS S21800 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 S21800 flanges as per the requirement of the clients

UNS S21800 is an all purpose metal that was originally designed as a temperature alloy and therefore has good high temperature properties for temperatures around 1800oF.

The chemical composition of UNS S21800 flanges is as follows


0.1 max


16 - 18




7 - 9


8 - 9


0.08 - 0.18


0.04 max


3.5 - 4.5


0.03 max

The mechanical property of UNS S21800 flanges is as follows

Minimum Specified Properties,

Ultimate Tensile Strength, MPA


0.2% Yield Strength, MPA


Elongation, %


Reduction of Area, %


Hardness MAX, Brinell


We could supply material certificate of UNS S21800 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 S21800 flanges will be 100% Ultrasonic Inspection as per the forging parts UT Test standard of ASTM A 388 or EN102768.

Our UNS S21800 flanges are widely used in many industries,such as Marine engineering,Chemical and hydrocarbon processing equipment,Gasoline and freshwater tanks,Crude petroleum stills,De-aerating heaters,Boiler feed water heaters and other heat exchangers,Valves, pumps,Industrial heat exchangers,Chlorinated solvents,Crude oil distillation towers

Ask for our Delivery Guarantee for our S21800 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 S21800 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 S21800 flanges, we are glad to quote the best price for your side.

Except UNS S21800 flanges,we also could produce UNS S21800 bars,UNS S21800 plates,UNS S21800 fastener,UNS S21800 bolts,UNS S21800 fittings,UNS S21800 pipes,UNS S21800 tubes,UNS S21800 springs