UNS N19903 Flanges
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We produce UNS N19903 flanges,N19903 flanges,UNS N19903 Blind Flanges,UNS N19903 Welding Neck Flanges,UNS N19903 Slip On Flanges,UNS N19903 Socket Welding Flanges,UNS N19903 Lap joint Flanges,UNS N19903 Ring joint Flanges,UNS N19903 Slip-on flanges,UNS N19903 Weld Neck Flanges,UNS N19903 WN flanges,UNS N19903 LWN flanges, UNS N19903 Long weld neck flanges,UNS N19903 orifice flanges,UNS N19903 Spectacle blind Flanges,N19903 Spectacle flanges, N19903 spacer ring flanges,UNS N19903 Swivel Ring Flanges,UNS N19903 WNRF Flanges,UNS N19903 SORF Flanges,UNS N19903 SWRF Flanges,UNS N19903 Threaded Flanges,UNS N19903 Ring Type Joint Flanges,UNS N19903 BLRF Flanges,UNS N19903 RTJ Flanges from china

The size of UNS N19903 flanges that we could do is from 1/2” – 96”, DN15-DN2000

We could produce UNS N19903 flanges with pressre from 150LB-2500LB or PN6-PN100

The face of UNS N19903 flanges that we could do is in Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Also we could produce UNS N19903 flanges as per the drawing of the clients

Following is the standard of UNS N19903 flanges that we could do:

American standard of UNS N19903 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 N19903 flanges in DIN 2630,2620,2632,2633,2634,2635,2636,2637,2638,2501(WN);


British standard of UNS N19903 flanges in BS3293,BS4504,BS10

The Italy standard of N19903 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 N19903 flanges in JIS B27620,

Korean Standard of UNS N19903 flanges in KSB 1503,KSB 6216,KSB 2332,KSB 2333,KSD 3578,KSD 4308.

Australian standard of UNS N19903 flanges in AS 4087,AS 2129,AS/NZS 4320.1

ISO standsard of UNS N19903 flanges in ISO 7005-1,ISO 9624

Russian standard of UNS N19903 flanges in GOST 12820,GOST 12821,GOST 12836,GOST 12820-80,GOST 12821-80,GOST 12836-80.

European standard of N19903 flanges in EN1092-1

South african standard of UNS N19903 flanges in SABS-1123/SANS-1123

As per surface treatment of N19903 flange, we could do Anti-rust Oil;Black /Yellow Paint;Hot-dipped Galvanization as per the requirement of the clients

The material grade of N19903 flanges is by forging as per the standard of ASTM B462.

We will do following testing to control the quality of UNS N19903 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 N19903 flanges as per the requirement of the clients

UNS N19903 is a nickel-cobalt alloy added with niobium to increase its oxidation resistance and strength

The chemical composition of UNS N19903 flanges is as follows


Content (%)













The mechanical property of UNS N19903 flanges is as follows



Tensile  strength (precipitation hardened)

1310 MPa

Yield  strength (@ strain 0.200 %, precipitation hardened)

1100 MPa

Elastic  modulus (@ 0°C/32°F)

146.8 GPa

Poisson's  ratio (@ 250°C/482°F)


Elongation  at break (precipitation hardened)


We could supply material certificate of UNS N19903 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 N19903 flanges will be 100% Ultrasonic Inspection as per the forging parts UT Test standard of ASTM A 388 or EN102768.

Our UNS N19903 flanges are widely used in many industries,such as Drilling & Boring Equipment ,Wellhead Manufacture,Repair or Servicing Companies,Pipeline Construction & Repair.Pumping & Refining Equipment,Oil Extraction Systems,Oil Rig Construction,Repair & Maintenance Subcontractors ,Upstream, Midstream or Downstream Service Providers .Isolation Valves & Choke Equipment Manufacturers,Submersible Watercraft and so on

Ask for our Delivery Guarantee for our N19903 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 N19903 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 N19903 flanges, we are glad to quote the best price for your side.

Except UNS N19903 flanges,we also could produce UNS N19903 bars,UNS N19903 plates,UNS N19903 fastener,UNS N19903 bolts,UNS N19903 fittings,UNS N19903 pipes,UNS N19903 tubes,UNS N19903 springs