Hastelloy C22 Flanges Supplier in China
They are manufactured from alloy c22,a premium nickel-chromium-molybdenum-tungsten sueralloy.This specific material composition makes these flanges far superior to standard stainless steel in resisting aggressive chemical attacks,pitting,and high temperatures.
Key Benefits And Features
- Universal Corrosion Resistance:
They offer robust protection in both oxidizing and reducing chemical streams,a rare feat for standard alloys. - Superior Intergranular Stability:
The alloy resists the formation of grain-boundary precipitates during welding.This allows the flanges to be used safely in an “as-welded” state without losing corrosion resistance. - Temperature Resilience:
They maintain mechanical integrity at cryogenic limits and can withstand extreme operational heat up to 1250°F (677°C) for continuous exposure. - C22 vs. C276 Upgrade:
While similar to the popular Hastelloy C276,C22 contains higher chromium content,providing significantly better protection against localized pitting and highly oxidizing environments
Common Types of Flanges
- Weld Neck Flange:
Features a long tapered hub that welds directly to the pipe,ideal for high-pressure systems. - Slip-On Flange:
Slides over the pipe and is welded both inside and outside for easier alignment. - Blind Flange:
Solid discs used to seal off the end of a piping system or pressure vessel. - Socket Weld Flange:
Used to seal off or block the end of a piping system. - Lap Joint Flange:
Paired with a stub end for systems that require frequent dismantling and cleaning.
Hastelloy C22 Equivalent Designations
| Standards | UNS | DIN / W.Nr. | EN | JIS | AFNOR |
|---|---|---|---|---|---|
| C22 | N06022 | 2.4602 | NiCr21Mo14W | NW 6022 | NU-30M |
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Dimensions of Our Flanges
Flange Standard
We supply stainless steel flanges in various standards, including but not limited to the followings:
ASME/ANSI B16.5, B16.47A/B, ASME B16.36, MSS SP-44, ISO7005-I, API type 6B/6BX, API605, GB9112~9124, BS1560-3.1,
EN 1092-1 (DIN2527, 2636, 2637, 2638, 2566, 2576, 2632, 3633, 2635, 2642, 2653, 2656, 2655, etc.)JIS B2220, AS2129, AS4078, GOST 33259, GOST 12820/12821, GOST 12816 etc.
The Capacity
It is about 400 tons/month for every type flanges. We produce and supply the flanges from Class 150 to Class 2500, stainless steel and duplex steel flange are our strength.Rate: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500LBSDimension: 1/2” to 72” (DN15 ~DN1800)
Chemical Composition of Hastelloy C22 Flanges, wt.%
| Element | Ni | Cr | Mo | Fe | W | Co | Mn | V | Si | P | S | C |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C22 | Balance | 20.0 – 22.5 | 12.5 – 14.5 | 2.0 – 6.0 | 2.5 – 3.5 | ≤ 2.5 | ≤ 0.5 | ≤ 0.35 | ≤ 0.08 | ≤ 0.02 | ≤ 0.02 | ≤ 0.015 |
Mechanical Properties of Hastelloy C22 Flanges
| Mechanical Property | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| Hastelloy C22 | ≥ 690 MPa(100 ksi) | ≥ 310 MPa(45 ksi) | ≥ 45% | ≤ 90 HRB |
Applications of Hastelloy C22 Flanges
- Reboilers and Condensers in Chemical Processing
- Pharmaceutical Reaction Vessels
- Sour Gas Extraction Piping
- Wet Chlorine Gas Transfer Lines
- Flue Gas Desulfurization Scrubbers
- Acetic Acid Production Equipment
- Spent Nuclear Fuel Reprocessing
- Marine and Subsea Equipment
- Industrial Wastewater Neutralization
- Pesticide and Herbicide Manufacturing
The Relationship Between Hastelloy C22 Flanges and Pipes
Dimensional and Structural Matching
- Bore Matching:
The inner diameter of a weld neck flange must be machined to exactly match the internal schedule of the C22 pipe.This ensures a smooth,seamless fluid flow inside,preventing turbulent zones that can lead to localized erosion. - Sizing Standards:
Flanges are sized using ASME B16.5 or B16.47,which corresponds precisely to the nominal pipe size standards governing the pipes under ASME B36.19.A 4-inch Class 300 flange will precisely fit a 4-inch pipe.
Metallurgical Harmony and Welding
- The “As-Welded” Advantage:
Hastelloy C22 has an extremely low carbon content,so no carbide precipitates form during welding. - Corrosion Continuity:
The welded joint exhibits the same excellent resistance to pitting,crevice corrosion,and cracking as the parent pipe.No post-weld heat treatment is required.
Mechanical Force Transmission
- Anchoring and Support:
Flanges act as the heavy-duty anchor points for the relatively thin-walled C22 pipe.They transition the pipeline into valves,pumps,and reactors. - Thermal Expansion:
Both the flange and the pipe have the exact same coefficient of thermal expansion.When the pipeline heats up to its maximum limits (up to 1250°F / 677°C),the flange and pipe expand at the identical rate,preventing destructive thermal stresses or bending moments at the joint.
Cost Optimization Strategy
- Solid C22 Systems:
For maximum pressure and critical safety,solid C22 flanges are welded directly to solid C22 pipes. - Lap Joint / Stub End Economy:
To save money on large-diameter pipelines,engineers will weld a small,lightweight Hastelloy C22 stub end onto the C22 pipe,and then slide a cheaper,standard stainless steel or carbon steel lap joint flange behind it.The fluid only touches the C22 pipe and stub end,while the cheaper steel flange handles the mechanical bolting.
Frequently Asked Questions
Their premium cost is driven by two factors:raw materials and machining difficulty.The alloy contains high percentages of expensive elements like nickel,molybdenum,and tungsten.Because the material is engineered to resist high-temperature deformation,it causes severe tool wear during the forging and machining processes,increasing manufacturing costs.
When you want to get a quote or release a PO to us, pls clear the information:
Flange type + RF/RTJ/FF + Class (including pipe SCH for WN and SW flange) + Size + Material + Standard + Order Quantity
For example, you want to buy 100 pcs welding neck flange with raised face for your system and the pipe is 8” SCH40S, pressure rate is class 300 in stainless steel 316, the piping design is to ASME, so the description would be:
WNRF flange, 8” 300# SCH40S, A182 F316, ASME B16.5, 100PCS
Please don’t hesitate to contact us if you have any question.
Contact Us
- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
