If you're searching for a Nickel 200 Flanges Manufacturer in India, the useful question is not simply “Do you have nickel flanges?” It is whether the offered flange matches the UNS N02200 grade, your piping drawing, operating temperature and inspection requirements. This guide explains what to send with an enquiry to SankalPalloys so technical and commercial discussions start with the same information.
What is a Nickel 200 flange, and when should it be considered?
A Nickel 200 flange joins a pipe, valve or equipment nozzle using commercially pure wrought nickel. Nickel 200 is designated UNS N02200 and is selected where its corrosion behaviour and mechanical properties fit the stated process conditions. A flange must also be compatible with its gasket, bolts, mating flange and applicable piping code.
Is Nickel 200 a nickel alloy or pure nickel?
Nickel 200 is commonly called commercially pure nickel rather than a chromium-rich corrosion-resistant alloy. Its specified nickel content is at least 99.0% (nickel plus cobalt under applicable material specifications). That distinction matters: you cannot assume it behaves like Alloy 625, Monel 400 or stainless steel in every fluid.
Sticky Q&A — What should I confirm first? Start with the process medium and design temperature, then check UNS N02200, the flange dimensional standard, size, bore, class and facing. A correct metal grade does not fix a mismatched bolt circle.
Nickel 200 composition and grade verification
The figures below are chemical limits commonly specified for UNS N02200 forgings under ASTM B564, expressed as weight percentages. They are reference limits, not measured results for a particular batch. Confirm the governing edition and actual heat analysis on the material test certificate (MTC).
| Element | Specified content / maximum |
|---|---|
| Nickel (including cobalt, as specified) | 99.0% minimum |
| Carbon | 0.15% maximum |
| Iron | 0.40% maximum |
| Manganese | 0.35% maximum |
| Silicon | 0.35% maximum |
| Copper | 0.25% maximum |
| Sulfur | 0.01% maximum |
| Grade designation | UNS N02200 (verify on MTC) |
Buyer tip: Spell out Nickel 200 / UNS N02200 in your purchase order. If a quotation says only “pure nickel flange,” ask for the governing material specification and traceable heat identification. Grade-name shortcuts cause real receiving-stage confusion.
Nickel 200 flange types and how buyers choose them
Different flange constructions suit different connections. Confirm whether the required type can be supplied to your selected standard and drawing; do not assume every type is available in every size or class.
| Flange type | Typical connection | Detail to confirm |
|---|---|---|
| Weld neck | Butt-welded piping connection | Bore, pipe schedule and weld preparation |
| Slip-on | Fillet-welded connection when permitted | Pipe fit-up and welding requirements |
| Blind | Closes an end or nozzle | Thickness, class and design conditions |
| Socket weld | Specified small-bore piping | Socket dimensions and installation gap |
| Threaded | Approved non-welded connection | Thread specification and service restrictions |
| Lap joint | Backing flange with a stub end | Stub-end material and mating dimensions |
Raised face, flat face or ring-type joint?
RF means raised face, FF flat face and RTJ ring-type joint. Face selection must suit the mating flange and gasket. A price comparison is not meaningful if one vendor quotes RF and another quotes RTJ.
ASME pressure classes and Nickel 200 flange design checks
ASME B16.5 is a commonly specified dimensional and pressure-temperature rating standard for flanges within its size scope. Common classes include 150, 300, 400, 600, 900, 1500 and 2500. However, confirm the applicable standard edition, material-group coverage and permitted size/class combinations for the actual flange.
| RFQ field | Why it matters |
|---|---|
| Pressure class | A class designation is not the operating pressure in psi |
| Nominal size (NPS / DN) | Determines key flange and bolt-pattern dimensions |
| Bore / pipe schedule | Controls fit-up, especially for weld-neck flanges |
| Facing and gasket | Must suit the mating connection and sealing design |
Sticky Q&A — Does Class 300 mean 300 psi? No. Class 300 identifies a rating class; allowable pressure depends on the specified material, design temperature and governing standard. Check the complete joint, including gasket and bolting, against the project code.
Material standards, inspection and documents for Nickel 200 flanges
Which specifications should appear in the RFQ?
- UNS N02200: Identifies Nickel 200 material; confirm this on the MTC.
- ASTM B564: A relevant specification for nickel alloy forgings that includes UNS N02200; verify the chosen edition.
- ASME SB-564: Refer to this where the applicable project code requires the ASME material specification.
- ASME B16.5: Use for flange dimensions and ratings where its scope and material provisions apply.
- Approved drawing / project specification: Specify nonstandard bores, machining, finish, tolerances and inspection.
What inspection documents should a buyer ask for?
State whether the order requires an MTC, heat-number traceability, dimensional inspection, PMI (positive material identification), non-destructive testing or third-party witness inspection. Certificate format and extra tests should be agreed at RFQ stage rather than added after production.
Practical point: A photo of an old flange rarely shows its bore, bolt-hole diameter or facing finish properly. Send a dimensioned drawing or the existing flange's verified designation.
Where are Nickel 200 flanges used — and where is Nickel 201 preferred?
Nickel 200 is considered for selected caustic soda and alkali-handling systems, chemical-process piping and specialty equipment where commercially pure nickel is specified. Suitability depends on alkali concentration, temperature, dissolved contaminants, oxidizing conditions and the intended service life. Do not select it for every corrosive chemical just because it contains a high proportion of nickel.
What is the practical difference between Nickel 200 and Nickel 201?
Nickel 201 (UNS N02201) is the lower-carbon counterpart: its carbon limit is typically 0.02% maximum versus 0.15% maximum for Nickel 200. For prolonged high-temperature exposure, Nickel 200 can be affected by graphitization and loss of ductility; approximately 315°C (600°F) is an important screening threshold often referenced in selection guidance. Check current code limits and consider Nickel 201 for hotter service rather than assuming an automatic substitution.
SankalPalloys technical team perspective (suggested wording — confirm internally before attributing): “The temperature is one of the first things we would ask about. An enquiry for a Nickel 200 flange without the service conditions can miss the most important grade-selection question.”
How to request a Nickel 200 flange quotation in India
A usable enquiry is usually brief, but specific. Include these details so different quotations cover the same scope:
- Material: Nickel 200 / UNS N02200; state if alternatives are prohibited.
- Flange type, quantity and approved drawing, if any.
- Nominal size (NPS / DN), bore and matching pipe schedule.
- Dimensional standard, pressure class and facing (RF, FF or RTJ).
- Forging-material specification and any required material condition.
- Design temperature, pressure and process medium or concentration.
- MTC, traceability, PMI, NDT and third-party inspection, if required.
- Delivery location, date, packing and commercial conditions.
Four purchasing mistakes worth avoiding
1. Ordering “nickel” without specifying UNS N02200. 2. Confusing Nickel 200 with Nickel 201 for elevated-temperature duty. 3. Missing the flange bore or facing on the RFQ. 4. Comparing unit rates without checking material certificates, inspection scope and delivery terms.
Sticky Q&A — How do I compare two Nickel 200 flange quotes? Put the UNS grade, material standard, drawing, facing, pressure class, inspection documents, quantity and delivery basis side by side. A cheaper line item may simply exclude one of those requirements.
For a Nickel 200 enquiry, contact SankalPalloys with your drawing or bill of materials. Ask for written confirmation of grade, technical scope, supply feasibility and quotation terms.
FAQs: Nickel 200 flanges in India
What is the UNS designation for Nickel 200 flanges?
Nickel 200 is designated UNS N02200. Include that grade, the material specification and the required flange drawing in the enquiry.
Does ASTM B564 cover Nickel 200 forged flanges?
ASTM B564 includes nickel forgings of UNS N02200. It addresses forging-material requirements; dimensions and pressure ratings must be checked against a separate, applicable flange standard.
What is the difference between Nickel 200 and Nickel 201?
Nickel 201 (UNS N02201) has a lower maximum carbon content, typically 0.02% versus Nickel 200's 0.15%. Nickel 201 is generally considered for higher-temperature service because of Nickel 200's graphitization concern.
Can Nickel 200 flanges be used in caustic soda service?
They may be suitable for specified caustic service, but suitability depends on temperature, alkali concentration, contamination and code requirements. Confirm the conditions rather than assuming universal resistance.
Are weld-neck, blind and slip-on Nickel 200 flanges available?
These are common flange configurations to enquire about. Actual supply feasibility depends on size, class, forging route, drawings and order quantity; obtain written confirmation.
Is an ASME Class 300 flange rated to 300 psi?
No. The class is a standardized designation, not a fixed operating pressure. Check the applicable pressure-temperature rating and the complete joint design.
Which inspection certificates should I request?
Specify the required MTC, heat traceability and dimensional report, plus PMI, NDT or third-party inspection where your project requires them. Agree documentation before placing the order.
What should I send to obtain a Nickel 200 flange quotation?
Send UNS N02200, type, size, bore, class, facing, standard, quantity, design conditions, inspection requirements, delivery location and any relevant drawing.
Discuss your Nickel 200 flange requirements with SankalPalloys
Send your UNS N02200 flange requirements, drawings, class, bore, facing, quantity and inspection needs. Contact SankalPalloys to confirm the technical scope and request a relevant quotation before ordering.
Technical references
Verify the relevant current standards, service limits and purchase requirements using original technical sources:
- Special Metals — nickel material and corrosion-resistance technical resources
- ASME B16.5 — Pipe Flanges and Flanged Fittings
- ASTM B564 — Standard Specification for Nickel Alloy Forgings
This guide is general purchasing information, not a project-specific engineering approval or a statement of current stock, manufacturing capacity or delivery availability. Confirm the current material specification, design code and commercial terms before purchasing.