RapidBoltEngineered Gaskets for Critical Flanged Joints
Spiral wound, ring type joint, Kammprofile and sheet gaskets — in exotic alloys and high-performance fillers, certified to ASME B16.20, B16.21 and API 6A.
The complete flanged joint — from one supplier
EMG supplies engineered flange sealing solutions built to withstand the pressure, temperature and corrosive service seen across Oil & Gas, LNG, Petrochemical and Power Generation projects worldwide.
Our range spans spiral wound (SWG), ring type joint (RTJ), Kammprofile, corrugated metal, jacketed and non-asbestos sheet gaskets — in Duplex, Super Duplex, 6Mo, Inconel, Monel, Hastelloy, stainless and carbon steel windings, with graphite, PTFE, ceramic or mica fillers matched to service medium.
A flanged joint is only as reliable as its weakest component — mismatched gaskets, bolts or flanges are the single largest source of leak-path failures. We supply the whole joint, engineered and certified together.
High-integrity sealing for high pressure & temperature
Widely used in petrochemical, LNG and wellhead service. Metal cores combined with soft sealing media — typically graphite — deliver very high leak-tightness on flanged joints from Class 150 up to API 6A 20K.
Spiral Wound Gasket (SWG)
Alternating metal winding and soft filler — the industry-default semi-metallic gasket for raised-face flanges from Class 150 to Class 2500. Highly leak-tight and forgiving of minor flange irregularity.
- Basic (R)
- With Inner Ring (CGI)
- With Outer Ring (CG)
- Inner + Outer Ring
Kammprofile Gasket
Solid serrated metal core faced with graphite or PTFE. Tolerates lower bolt load and slight flange misalignment — the preferred choice for heat exchangers and joints that are repeatedly opened.
- Graphite Faced
- PTFE Faced
- With Integral Outer Ring
- Custom HX Profiles
Ring Type Joint (RTJ)
Solid forged metal ring that deforms into machined flange grooves for a positive metal-to-metal seal. Standard on wellhead, Christmas tree and Class 900+ high-pressure service.
- Type R — Oval / Octagonal
- Type RX — Pressure-energised
- Type BX — API 6A 10K+
Metal Jacketed Gasket
Soft filler completely encased in a metal jacket. Custom profiles with pass partitions are cut for heat exchanger tube sheets, channel covers and non-standard flange geometries.
- Single Jacketed
- Double Jacketed
- Solid Metal
- Custom Pass-Partition
Sentry Gasket
Semi-metallic gasket engineered as a direct upgrade to standard SWGs. Combines a solid metal core with soft-facing layers to deliver very high leak-tightness and stable bolt-load retention.
- Standard Facing
- Graphite Facing
- PTFE Facing
- Custom Profile
Corrugated Graphite Gasket
Corrugated stainless or exotic-alloy metal core faced with flexible graphite. A cost-effective semi-metallic option for medium-pressure raised-face service with moderate seating stress.
- 316L Core
- Duplex Core
- Inconel Core
- Graphite-Faced Both Sides
Isolation Gasket Kits
Insulation gasket sets with dielectric retainer, insulating sleeves and double washers — used for cathodic protection isolation on pipelines and offshore flanges.
- Type E (Full-Face)
- Type F (Raised-Face)
- Type D (RTJ)
- G10 / G11 / Phenolic
Full-face & ring gaskets, cut to any profile
Supplied off the shelf in common materials or on demand from stock sheet with very quick turnarounds. Standard flange profiles or custom geometries — matched to the fluid, temperature and pressure of your service.
Compressed Fibre (CNAF)
High-performance non-asbestos sheet with aramid, glass or carbon fibres bonded in NBR, EPDM or SBR elastomer. The workhorse of low-to-medium pressure water, steam, hydrocarbon and utility service.
- Aramid / NBR
- Aramid / EPDM
- Carbon / NBR
- Glass Fibre / SBR
Graphite Sheet & Laminates
Flexible expanded graphite with stainless tanged, foil or perforated metal reinforcement. Excellent for steam, thermal oil and high-temperature hydrocarbon service up to +550 °C.
- Tanged 316L Insert
- Foil Insert
- Perforated Metal Insert
- Plain Graphite
PTFE (Filled, Modified, Virgin)
Chemically inert sheet for aggressive acids, alkalis, chlorine and solvents. Filled and modified grades resist cold-flow (creep) and hold bolt load far better than virgin PTFE.
- Virgin PTFE
- Silica-Filled
- Glass-Filled
- Modified / Expanded PTFE
Rubber & Elastomer
Elastomer sheet gaskets cut from NBR, EPDM, FKM (Viton), silicone or natural rubber. Standard on water, air, low-pressure gas and food-contact service.
- NBR (Nitrile)
- EPDM
- FKM / Viton
- Silicone
- Natural Rubber
Cork & Cork-Rubber
Compressible cork and cork-elastomer sheet used where flanges are lightly loaded, misaligned or subject to vibration — transformers, gearboxes, oil pans and inspection covers.
- Pure Cork
- Cork / Nitrile
- Cork / Neoprene
- Cork / SBR
Paper, Plastic & Shim
Cellulose paper, plastic film and metal shim gaskets for low-pressure sealing, spacer duties and setting flange gap. Cut to any profile from stock sheet.
- Cellulose Paper
- Nylon / PET Film
- Stainless Shim
- Brass / Copper Shim
Alloy selection matched to the service
Winding, ring and filler materials selected for temperature, chemistry and pressure class — every heat traceable.
Stainless Steel
General process service
Filler & Facing Materials
Where our gaskets are specified
Topside & subsea flanges, wellhead, Christmas tree, cryogenic and high-temp service
Process piping, reactor manways, heat exchangers, hydrocarbon vapour service
Steam headers, boiler flanges, HRSG, turbine casings
Chlorine, acid, caustic and solvent service, jacketed reactors
Seawater and produced-water systems, pumps, valve bonnets
Insulation kits for cathodic protection, compact flanged connections
Certified to international specifications
Metallic gaskets — SWG, RTJ, Kammprofile
Non-metallic flat gaskets for pipe flanges
RTJ gaskets — R, RX, BX for wellhead & Christmas tree
Fire test standard for end connections
Compact flanged connections and gaskets
European gasket dimensional standards
Bolted-joint assembly & gasket installation
Material certification with heat-number traceability
Choosing the right gasket
A quick-reference matrix — talk to our engineers to confirm your specification.
| Service Condition | Recommended Gasket | Typical Material |
|---|---|---|
| Class 150 – 600 raised-face piping | Spiral Wound (Graphite filler) | 316L / F51 winding |
| Class 900 – 2500 high-pressure | SWG or RTJ Type R | Inconel 625 / F5 |
| API 6A wellhead (10K+ psi) | RTJ Type BX | Soft iron / Inconel 625 |
| Heat exchanger tube sheets | Kammprofile or Double Jacketed | 316L / Duplex |
| Sour service (NACE MR0175) | SWG or RTJ with graphite | Inconel 625 / 825 |
| Cryogenic LNG service | SWG with PTFE filler | 316L winding |
| Low-pressure utility / water | CNAF or Graphite sheet | Non-metallic |
| Cathodic protection isolation | Type E / F / D kit | G10 / PTFE / GRE |
Technical FAQs
Which gasket type should I specify for a high-pressure raised-face flange?
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What is the difference between Kammprofile and spiral wound gaskets?
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Can you supply gaskets, flanges, studs and nuts as a matched joint kit?
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Which winding and filler should I choose for sour service (H₂S)?
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Do you supply insulation kits for cathodic protection?
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Need Compliant Gaskets for a Safety-Critical Project?
Talk to our engineers about specifications, materials and documentation requirements.
Phone
+61 (0)7 4055 6928Emergency Support
24/7 availability for critical projects