Material route
Duplex 2205 with the exact approved UNS and grade designation stated in the enquiry
Alloy flanges and fittings
Duplex Stainless Steel Flanges Manufacturer & Exporter
Raymond Tube Industries manufactures and supplies Duplex Stainless Steel flanges for process, offshore, marine, chemical, and chloride-bearing piping requirements. Buyers should state whether the approved material route is Duplex 2205, UNS S31803, UNS S32205, or a project-specific designation, then define flange form, size, class, facing, bore, material and dimensional standards, heat treatment, inspection, documentation, packing, and destination.
Technical snapshot
Key details for your specification.
Engineering discussion
Context before component selection.
State the approved duplex designation
Duplex 2205, UNS S31803, and UNS S32205 are often discussed together, but the purchase order must carry the exact material and grade designation approved by the project. Substitution requires engineering acceptance.
Flange configuration remains independent of alloy
Weld neck, RTJ, blind, slip-on, socket-weld, threaded, and lap-joint forms have different connection and inspection controls. Define class, facing, bore, hub, and gasket interface for each item.
Thermal history matters to duplex procurement
The ordered product standard and project additions should define heat treatment and any required phase-balance, corrosion, ferrite, or hardness evidence. Final acceptance comes from the agreed tests and MTC.
Inspection planning should precede manufacture
Set PMI, dimensions, NDE, corrosion testing, TPI witness points, marking, traceability, and dossier requirements before work begins so test samples and records remain connected to the heat and line item.
Service context belongs in the enquiry
Provide chloride exposure, temperature, pressure, fluid, sour-service context, fabrication restrictions, and project specification where material selection or supplementary testing depends on the environment.
Standards and release
Define the basis, then document it.
ASTM A182 / ASME SA182
Confirm the exact duplex grade designation, product form, heat treatment, mechanical requirements, testing, and supplementary requirements in the order.
ASME B16.5
Common dimensional route for applicable flange sizes and pressure classes; pair it with the material specification and piping class.
ASME B16.47
Use the applicable series only for large-diameter requirements within its scope and with the project-approved dimensional basis.
Project corrosion requirements
IGC, pitting corrosion, NACE, ferrite, hardness, NDE, and acceptance criteria must be stated where applicable; none are automatic from the word duplex.
Applications and next steps
Connect the requirement to the right workflow.
Offshore topside piping
Marine and seawater utilities
Chemical-process systems
Desalination and water treatment
Oil and gas production facilities
Pulp and paper process lines
Heat exchanger connections
Strength-sensitive process piping
Duplex 2205 FlangesReview the established 2205 flange route.Duplex 2205 MaterialReview grade identity and material-selection context.Super Duplex FlangesReview S32750 and S32760 severe-service routes.ASTM A182 Forged FlangesReview forged flange material procurement controls.ASME B16.5 GuideReview dimensions, classes, and facing terminology.Duplex vs Super DuplexCompare material-selection considerations.Duplex Pipe FittingsPair flange and fitting requirements.Request Technical QuotationSend the duplex flange specification.
Buyer questions
Frequently asked questions.
Technical quotation
Turn this guidance into a controlled request.
Capture the material, product form, dimensions, standard, inspection, documentation, packing, and destination requirements for review.
