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Metallic Gaskets

Ring-type joints for extreme flanges

Ring-type-joint (RTJ) metallic gaskets in soft iron and stainless that seal the highest-pressure, highest-temperature flange duties.

  • Seals the highest flange classes and pressures
  • Controlled plastic deformation for a metal-to-metal seal
  • Oval (R) and octagonal (R / RX / BX) profiles
  • Soft iron to stainless and exotic-alloy materials
  • ASME B16.20 and API 6A wellhead-rated
Add to QuoteView Datasheet
Temperature
-50°C to +800°C (material dependent)
Pressure
Up to 700 bar · ASME Class 2500 / API 6A 20 000 psi
pH range
0 – 14 (alloy dependent)
Octagonal ring-type-joint metallic gasket seated in a flange groove
Other ProductsREF · metallic-gasket
Technical DatasheetSPEC

The numbers, on the record

Every figure below is the specification we hold ourselves to — material, service envelope, media compatibility and conformance. Download it as a standalone document for your dossier.

SealGuard

Technical Datasheet

Doc No.
DS-METALLIC-GASKET
Revision
Rev. A
Issue
2026-Q3
Class
Other Products

Metallic Gaskets

Ring-type joints for extreme flanges

01

Material & Construction

Solid machined ring — soft iron, low-carbon / stainless steel or exotic alloy

02

Service Envelope

Temperature range-50°C to +800°C (material dependent)
Pressure ratingUp to 700 bar · ASME Class 2500 / API 6A 20 000 psi
pH range0 – 14 (alloy dependent)
03

Media Compatibility

HydrocarbonsSour gas (H₂S)SteamCrude oilAcids (alloy)
04

Dimensions & Sizing

R / RX / BX profiles · ASME Class 600–2500 · API 6A 2000–20000 psi

05

Standards & Conformance

  • ASME B16.20
  • API 6A
  • API 17D
06

Certifications

  • ISO 9001
  • NACE MR0175 / ISO 15156 (sour)
  • API 6A monogram
07

Additional Specifications

ProfileR (oval/octagonal) · RX · BX
Seal mechanismControlled plastic deformation
HardnessSofter than flange (e.g. ≤ 90 HB soft iron)
IdentificationStamped ring number & material

Data is typical and for guidance only — confirm suitability against your service conditions. Metallic Gaskets · DS-METALLIC-GASKET · Rev. A.

Specify & QuoteORDER

Build your line item

Choose the material grade and size that match your duty, set a quantity, and add a fully-specified line to your quote. No prices, no obligation — our engineers confirm specification and lead time on every enquiry.

01

Material grades

  • Soft iron (BR / 90 HB)
  • Low-carbon steel (F5)
  • 304 / 316 stainless (S304 / S316)
  • Inconel 625 / 825
  • Duplex / Monel (sour service)
02

Sizes & configurations

  • R-oval / R-octagonal
  • RX (pressure-energised)
  • BX (API 6A, high pressure)
  • ASME Class 600–2500
  • API 6A 2000–20000 psi
  • Ring numbers R11–R105 / custom
Configure your lineRFQ

In ServiceUSE

Where it holds the line

When flange class, pressure or temperature outruns every soft and semi-metallic gasket, the ring-type joint takes over. A precisely machined solid-metal ring — oval or octagonal — seats into matching grooves and seals by controlled plastic deformation under bolt load, holding the most extreme pressures and temperatures in the plant. Made from soft iron, low-carbon and stainless steels and exotic alloys to ASME B16.20 and API 6A, RTJ gaskets are the standard for wellheads, high-pressure pipework and refinery service at Class 2500 and above.

Typical applications

  • 01Wellhead and Christmas-tree flanges
  • 02High-pressure pipeline and manifold joints
  • 03Refinery high-temperature service
  • 04High-pressure heat exchangers and vessels
  • 05API 6A pressure-control equipment

Industries served

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Specify this seal for your service.

Send us the media, temperature, pressure and motion for your duty and our engineers will confirm the right material grade, size and standard for your application.

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