Custom & Special Flanges – Drawing Based Manufacturing

When standard flange dimensions are not suitable for a specific project, custom and special flanges can be manufactured according to customer drawings, technical specifications, dimensions, material requirements, and application conditions.

Vandan Alloys manufactures and supplies custom flanges for industrial, engineering, piping, process, fabrication, maintenance, and export requirements.

Custom Flange Manufacturing

Our custom flange manufacturing capability is suitable for requirements where the flange needs to be produced to a particular drawing or project specification.

Custom requirements can include:

• Special outside diameter (OD)

• Special inside diameter (ID)

• Customized flange thickness

• Specific PCD and bolt-hole arrangement

• Different number of bolt holes

• Special bolt-hole diameter

• Customized hub dimensions

• Special bore dimensions

• Customized facing

• Non-standard flange dimensions

• Special pressure or connection requirements

Drawing Based Flange Manufacturing

Customers can provide a PDF, CAD drawing, dimensional sketch, sample, or technical specification for manufacturing review.

Before production, our technical team can review the available information such as:

• Flange type

• Material grade

• Outside diameter

• Bore / inside diameter

• Thickness

• Bolt circle / PCD

• Number of holes

• Hole diameter

• Hub dimensions

• Facing type

• Overall dimensions

• Applicable standard or project specification

Where required, manufacturing details can be confirmed with the customer before production.

Types of Custom Flanges

Depending on the requirement, custom flanges can be manufactured in different configurations, including:

Weld Neck Flanges
Blind Flanges
Slip-On Flanges
Socket Weld Flanges
Threaded Flanges
Lap Joint Flanges
Orifice Flanges
Long Weld Neck Flanges
Plate Flanges
Special Ring Flanges
Custom Machined Flanges

The final configuration depends on the customer's drawing, application, material specification, and dimensional requirements.

Custom Flange Materials

Custom flanges can be supplied in a wide range of materials and grades, subject to manufacturing feasibility and specification requirements.

Common materials include:

• Carbon Steel

• Stainless Steel

• Duplex Stainless Steel

• Super Duplex Stainless Steel

• Alloy Steel

• Nickel Alloys

• Nickel-Copper Alloys

• High Temperature Alloys

• Titanium and other special materials

Typical grades may include ASTM A105, A182 F304/F304L, F316/F316L, F321, F347, F310, F904L, Duplex 2205, Super Duplex 2507, Inconel, Incoloy, Monel and Hastelloy grades.

Custom Flange Facing Options

The flange face can be manufactured according to the required connection and gasket arrangement.

Available configurations may include:

• Raised Face (RF)

• Flat Face (FF)

• Ring Type Joint (RTJ)

• Special machined facing as per drawing

For RTJ applications, groove dimensions and machining requirements should be clearly specified or provided through the applicable drawing/specification.

Custom Dimensions & Machining

Special flanges often require machining beyond standard flange dimensions. Vandan Alloys can manufacture components according to the approved dimensional requirements.

Machining requirements may include:

• CNC machining

• Precision boring

• Bolt-hole drilling

• PCD machining

• Facing

• Hub machining

• RTJ groove machining

• Special contour machining

• Dimensional finishing

All critical dimensions should be confirmed against the customer's drawing or approved specification before production.

Standards & Customer Specifications

Custom flanges can be manufactured with reference to applicable standards such as:

ASME B16.5
ASME B16.47
EN 1092-1
DIN Standards
JIS Standards
BS Standards
Customer Drawings & Project Specifications

A custom flange does not automatically become a standard flange simply because a standard is referenced. The actual manufacturing requirements are based on the approved drawing and applicable specification.

Inspection & Quality Documentation

Quality control is an important part of custom flange manufacturing.

Depending on the order requirements, documentation and inspection may include:

• Dimensional inspection

• Material identification

• Chemical analysis

• Mechanical test documentation

• Heat treatment records where applicable

• Visual inspection

• Third-party inspection (TPI)

• EN 10204 Type 3.1 Material Test Certificate

• Marking and traceability

• Inspection reports

Specific inspection requirements can be agreed before production.

Custom Flanges for Industrial Applications

Special flanges are used where standard catalogue dimensions cannot meet the project requirement.

Applications include:

• Oil & Gas

• Petrochemical Plants

• Chemical Processing

• Power Generation

• Refineries

• Water Treatment

• Marine & Shipbuilding

• Heavy Engineering

• Industrial Piping

• Pressure Systems

• Fabrication Projects

• Maintenance & Replacement Requirements

Replacement & Obsolete Flanges

Custom manufacturing can also be useful when an existing flange is damaged, obsolete, unavailable, or difficult to source.

An existing component, dimensional drawing, sample, or available technical information can be used as a reference for evaluating a replacement requirement.

Proper dimensional verification is important before manufacturing replacement flanges.

Why Choose Vandan Alloys for Custom Flanges?

Vandan Alloys provides drawing-based and specification-based flange manufacturing for domestic and international customers.

Our focus includes:

• Custom dimensional requirements

• Multiple material grades

• Different flange configurations

• Precision machining

• Inspection and documentation

• Export packing

• Small and bulk requirements

• Project-specific manufacturing support

Our team can review your drawing, specification, BOQ, or dimensional requirement and provide manufacturing feasibility and quotation accordingly.

How to Order Custom Flanges

To receive a quotation, customers can provide:

Flange Type:
Material Grade:
Size / OD:
Bore / ID:
Thickness:
PCD:
Number of Bolt Holes:
Bolt Hole Diameter:
Facing:
Quantity:
Applicable Standard:
Drawing / Specification:
Inspection Requirement:
Delivery Location:

Providing complete technical information helps us evaluate the requirement accurately and prepare the quotation.

Custom Flange Manufacturer & Exporter in India

Vandan Alloys manufactures and supplies custom flanges, special flanges, drawing-based flanges and engineered flange components from India for industrial and international requirements.

We support customers looking for custom flange manufacturers in India, special flange suppliers, drawing-based flange manufacturers, non-standard flange suppliers and precision machined flange exporters.

Send us your drawing or technical specification for review and quotation.

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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