Custom and standard flanges manufactured to AS9100D aerospace standards. From pipe flanges to complex mounting flanges, we deliver precision machined components meeting ANSI, DIN, SAE, and custom specifications with complete face flatness control, pressure testing, and full material traceability for critical aerospace, defence, and industrial applications.
Our precision CNC machining capabilities deliver flanges with exceptional accuracy for critical sealing and mounting applications. Whether you require standard ANSI/DIN pipe flanges or complex custom mounting flanges, we combine advanced multi-axis machining with rigorous quality control to ensure perfect face flatness, precise bolt hole patterns, and complete dimensional accuracy.
From small instrument flanges to large industrial pipe flanges up to 600mm diameter, we manufacture components from a comprehensive range of materials including carbon steel, stainless steel, titanium, and specialty alloys. Every flange undergoes face flatness verification, dimensional inspection, and pressure testing as required to ensure leak-free performance in demanding applications.
Oil & gas, chemical processing, hydraulic systems, pneumatic lines
Engine mounting flanges, fuel system connections, structural interfaces
Motor mounting, gearbox flanges, pump connections, bearing housings
Vessel connections, tank flanges, manifold interfaces, duct systems
Comprehensive range from standard pipe flanges to custom precision components
High-pressure pipe flanges with long tapered hub for butt welding.
Cost-effective flanges that slip over pipe and are fillet welded.
Solid flanges used to seal the end of piping systems or vessels.
Flanges with internal socket for small bore piping systems.
Flanges with internal threads for pipe connection without welding.
Two-piece design with stub end for systems requiring alignment.
Custom flanges for motor mounting, equipment attachment, and structural interfaces.
Specialized flanges for flow measurement and orifice plate installation.
Engineered flanges designed to unique specifications and requirements.
Manufacturing to international standards and custom specifications
Comprehensive material selection for pressure, temperature, and corrosion requirements
Benefits: High strength, economical, weldable
Benefits: Excellent corrosion resistance, cleanable surfaces
Benefits: High temperature strength, creep resistance
Benefits: Specialized performance, extreme environments
Precision manufacturing for critical sealing and mounting applications
Raised face, flat face, male/female, RTJ grooves
Drilled, reamed, tapped, counterbored, spot-faced
Weld prep bevels, tapered hubs, step bores
O-ring grooves, gasket seats, spiral wound grooves
Tap holes, lifting eyes, drain holes, vent holes
Stamping, engraving, etching for identification
Pressure ratings vary with temperature according to ASME B16.5:
Example: Class 150 carbon steel rated for 290 psi @ 100°F reduces to 230 psi @ 400°F
Consult pressure-temperature charts for specific material and temperature combinations
Corrosion protection and surface enhancement options
Epoxy, polyurethane, or specialized coatings per spec
Superior corrosion protection for outdoor/marine service
Zinc, cadmium, nickel plating to ASTM specifications
Stainless steel chemical treatment per ASTM A967
Uniform coating, excellent corrosion resistance
Mechanical polishing for sanitary/cleanroom applications
Stress relief, normalization, hardening as required
Surface preparation for coating or aesthetic finish
Comprehensive inspection ensuring dimensional accuracy and integrity
Complete dimensional inspection to drawing specifications.
Hydrostatic testing to verify pressure integrity.
Complete material traceability and certification.
Non-destructive testing for critical applications.
Surface finish and integrity verification.
Complete quality documentation package.
Our AS9100D quality management system ensures every flange meets aerospace and industrial standards with complete traceability and rigorous inspection protocols.
Best practices for flange design and selection
Our engineering team provides comprehensive support for flange selection and design:
Precision flanges for critical applications across diverse sectors
Pipeline flanges, wellhead components, refinery equipment
Engine mounting flanges, fuel system, hydraulic connections
Reactor flanges, process piping, tank connections
Steam systems, turbine connections, cooling systems
Seawater systems, ballast piping, engine room equipment
Distribution systems, treatment plants, pump stations
Ductwork connections, boiler flanges, chiller systems
Sanitary flanges, process vessels, clean room systems
Common questions about flange manufacturing
Weld neck flanges have a long tapered hub that is butt welded to the pipe, providing superior strength and fatigue resistance for high-pressure applications. Slip-on flanges slip over the pipe and are fillet welded on both sides, offering easier alignment and lower cost but reduced strength compared to weld neck designs. Weld neck flanges are preferred for Class 600 and higher pressures, while slip-on flanges are common in Class 150-300 applications.
Yes, we frequently manufacture custom flanges with non-standard bolt patterns, diameters, and configurations. Provide us with your drawing or specifications including bolt circle diameter, number of holes, hole size, and flange dimensions. We can match existing equipment interfaces or design entirely new flange patterns to your requirements.
We offer all standard face finishes including: raised face (RF), flat face (FF), ring-type joint (RTJ), male and female (M&F), and tongue and groove (T&G). Raised face is most common, with typical surface finish of Ra 3.2-6.3µm (125-250 micro-inch). For special applications, we can provide smoother finishes or specialized groove patterns for spiral-wound or ring gaskets.
Yes, we provide hydrostatic pressure testing per ASME B16.5 or customer specifications. Testing is performed at 1.5 times the rated working pressure. We provide complete test documentation including test pressure, duration, and results. Material certifications (MTR), Certificate of Conformance (C of C), and AS9102 First Article Inspection Reports are available for aerospace applications.
Lead times vary based on size, quantity, and material. Standard ANSI flanges machined from stock can typically be completed in 2-3 weeks. Flanges requiring forging or special materials may take 4-6 weeks. Large diameter flanges (>24") or high pressure classes (1500/2500) typically require 6-8 weeks. Rush services are available for urgent requirements.
Yes, we frequently machine flanges from forged or cast blanks. For high-pressure applications and large sizes, forged flanges offer superior strength and grain structure. We can source forgings per ASTM A105, A182, or other specifications, or machine customer-supplied forgings. Forged flanges are mandatory for Class 600 and higher in many codes.
We routinely achieve face flatness of ±0.01mm per 100mm diameter, which exceeds ASME B16.5 requirements. For critical sealing applications, we can provide even tighter flatness control with verification documentation. Face flatness is measured with precision straight edges and dial indicators or optical measurement systems.
Yes, we manufacture sanitary flanges for pharmaceutical, food processing, and biotechnology applications. These typically use 316L stainless steel with electropolished surfaces (Ra < 0.4µm) and special gasket grooves for silicone or EPDM seals. We follow 3-A sanitary standards and provide material certifications documenting surface finish and cleanliness.
Upload your flange specifications or drawings for a detailed quote. Our engineering team will review your requirements and recommend optimal materials, pressure ratings, and manufacturing methods.