Special / Non-Standard Flanges – Manufacturer, Exporter, Supplier & Stockist in India

Vandan Alloys manufactures, supplies and exports Special and Non-Standard Flanges for piping systems where a regular catalogue flange does not meet the required dimensions, connection arrangement or project specification.

Our special flange capabilities cover custom dimensions, modified standard flanges, special bore requirements, unusual bolt-hole patterns, non-standard thicknesses, special facings and drawing-based flange designs.

Based in Mumbai, India, Vandan Alloys supplies special flange requirements for oil & gas, petrochemical, chemical, power, refinery, marine, engineering and industrial applications.

What Are Special / Non-Standard Flanges?

A non-standard flange is a flange that requires dimensions, geometry or features outside a conventional standard configuration.

The requirement may be based on:

• Customer drawing

• Existing equipment dimensions

• Replacement flange dimensions

• Old or obsolete piping systems

• Special pressure requirements

• Equipment nozzle connection

• Special bore or pipe connection

• Modified bolt-hole arrangement

• Engineering project specification

A non-standard flange should be manufactured only after the required dimensions and technical requirements have been clearly established.

Types of Special Flanges We Supply

Vandan Alloys can manufacture or supply various special configurations, including:

• Custom Weld Neck Flanges

• Custom Blind Flanges

• Special Slip-On Flanges

• Special Socket Weld Flanges

• Custom Threaded Flanges

• Special Lap Joint Flanges

• Custom RTJ Flanges

• Special Orifice Flanges

• Long Weld Neck Flanges

• Large Diameter Special Flanges

• Equipment Flanges

• Nozzle Flanges

• Replacement Flanges

• Spacer / Ring Type Flanges

• Drawing-Based Flanges

The actual design is developed according to the applicable drawing, standard or engineering requirement.

Custom Flange Dimensions

Special flange orders may involve dimensions that differ from standard catalogue requirements.

Depending on the application, the drawing may specify:

Outside Diameter, Flange Thickness, Bore Diameter, Bolt Circle Diameter, Number of Bolt Holes, Bolt Hole Diameter, Raised Face Dimensions, RTJ Groove Details and Overall Configuration.

Every dimension should be confirmed against the mating component before manufacturing.

Special Materials & Grades

Vandan Alloys can handle special flange requirements in a wide range of materials.

Carbon Steel

• ASTM A105

• ASTM A105N

• Other specified carbon steel grades

Stainless Steel

• 304 / 304L

• 316 / 316L

• 321

• 347

• 310 / 310S

• 904L

Duplex & Super Duplex

• UNS S31803

• UNS S32205

• UNS S32750

• UNS S32760

Nickel & Special Alloys

• Nickel 200 / 201

• Monel 400 / K-500

• Inconel 600 / 601 / 625 / 718

• Incoloy 800 / 800H / 800HT / 825

• Hastelloy C276 / C22

• Titanium

• Other grades as specified

Material selection depends on the service environment and project requirements.

Special Flange Facing

Non-standard flanges can be manufactured with different facing arrangements where technically applicable:

• Raised Face (RF)

• Flat Face (FF)

• Ring Type Joint (RTJ)

• Special Machined Face

• Customer-Specified Facing

For RTJ requirements, groove dimensions and ring compatibility must be established according to the applicable standard or drawing.

Special Bolt Hole Arrangement

Some equipment and replacement applications require a bolt-hole pattern that does not match a standard flange.

Vandan Alloys can manufacture flange bolt-hole arrangements based on customer drawings or verified dimensions.

The following information may be required:

Number of Holes + Hole Diameter + Bolt Circle / PCD + Orientation + Hole Position

For replacement work, accurate dimensional information is especially important to ensure proper alignment during installation.

Special Bore & Pipe Connection

A special flange may require a specific internal bore rather than the usual standard bore.

Custom bore requirements can be considered for:

• Pipe OD matching

• Pipe wall thickness

• Weld-neck bore

• Equipment nozzle

• Special transition connection

• Existing flange replacement

• Fabricated piping assemblies

The bore should be confirmed against the actual pipe or mating component.

Replacement & Obsolete Flanges

Vandan Alloys can assist with replacement flanges where the original flange is damaged, unavailable or no longer readily available.

For such requirements, customers can provide:

• Existing flange photographs

• Dimensional sketch

• Old drawing

• Sample flange

• Equipment details

• Material information

• Required quantity

Where a sample or drawing is available, the required dimensions can be reviewed before manufacturing.

Specifications

Product: Special / Non-Standard Flanges
Manufacturing: Forged / Machined / As per drawing
Materials: Carbon Steel / Stainless Steel / Alloy Steel / Duplex / Super Duplex / Nickel Alloys / Titanium / Special Materials
Pressure Classes: As specified
Sizes: Standard or Custom
Facing: RF / FF / RTJ / Special
Bore: Standard or Customer-Specified
Bolt Holes: Standard or Custom PCD / Hole Arrangement
Standards: ASME / EN / DIN / JIS / BS / Customer Drawing
Inspection: Dimensional / Visual / Material / PMI / TPI as required
Documentation: MTC / EN 10204 Type 3.1 and other documents as specified

Drawing-Based Manufacturing

For complicated special flanges, a customer drawing is the preferred reference.

The drawing can define the complete flange geometry, including:

• Overall dimensions

• Bore

• Thickness

• Facing

• Bolt-hole details

• PCD

• Special machining

• Pressure tapping

• Groove details

• Material

• Tolerances

Vandan Alloys reviews the technical information before manufacturing so that the production requirement is clearly understood.

Applications

Special and non-standard flanges are used in:

• Oil & Gas Projects

• Refineries

• Petrochemical Plants

• Chemical Plants

• Power Plants

• Process Industries

• Offshore Applications

• Marine Systems

• Pressure Equipment

• Heat Exchanger Connections

• Pumps & Valves

• Equipment Nozzles

• Plant Maintenance

• Replacement & Shutdown Projects

• EPC Engineering Projects

Inspection & Quality Control

Special flange manufacturing requires careful dimensional control because the product may be designed specifically for one mating component.

Inspection can include:

• Dimensional Inspection

• Bore Measurement

• Thickness Verification

• PCD & Bolt Hole Inspection

• Facing Inspection

• Visual Inspection

• Material Verification

• PMI Testing

• Chemical & Mechanical Test Documentation

• Third-Party Inspection

• MTC / EN 10204 Type 3.1

Additional inspection requirements can be arranged according to the purchase order or project quality requirements.

Special Flanges Manufacturer & Exporter from India

Vandan Alloys is a Special Flanges Manufacturer, Exporter, Supplier and Stockist in Mumbai, India, supporting customers with standard, modified and fully customized flange requirements.

Our special flange supply is suitable for both new projects and replacement requirements, where standard off-the-shelf dimensions may not be suitable.

We supply to customers in India and international markets including the USA, Middle East, Europe, Asia and other destinations, subject to project and shipping requirements.

Why Choose Vandan Alloys?

• Manufacturer and supplier from Mumbai, India

• Custom flange manufacturing support

• Drawing-based production

• Wide range of materials and grades

• Special bore and bolt-hole configurations

• RF, FF and RTJ options

• Replacement flange support

• Material certification

• Inspection and TPI coordination

• Export packing and international shipment support

How to Enquire for a Special Flange

For a special or non-standard flange quotation, please send:

Drawing / Sketch + Material Grade + Size + Required Dimensions + Facing + Quantity + Pressure Requirement + Applicable Standard

If a drawing is not available, clear dimensions or photographs of the existing flange can be provided for initial review.

Contact Vandan Alloys

Vandan Alloys 

Manufacturer of All Types of Flanges

3/5, Sakar Bhavan, Ground Floor, 6th  Khetwadi lane, SVP Road ,Mumbai – 400 004. India

TEL+91 022 6610 9925Mobile no: 09892882255  GSTIN:  27AUMPS2067F1ZB

Email: info@vandanalloys.com ; Web: www.vandanalloys.com

Please visit Our Flanges Division:www.vandanalloys.net

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Vandan Alloys manufactures special and non-standard flanges in carbon steel, stainless steel, duplex, nickel alloys and special grades. Custom drawing-based flange supply.

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