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R / RX / BXSoft Iron & SS 316Oval & OctagonalHigh Pressure

Ring Type Joint Gasket (RTJ) Oval & Octagonal, R Series

Ring type joint · solid metal ring · ASME B16.20 / API 6A · UAE stock

RTJ gaskets are solid metal rings that seat in matching grooves in ring-type-joint flanges. They are used for high-pressure oil and gas service where soft gaskets would blow out.

Material
Soft iron / LCS / SS 316
Standard
ASME B16.20 / API 6A
Profile
Oval / octagonal
Types
R, RX, BX
Same-day quote Bulk & wholesale UAE & GCC delivery

Quality Assured

Checked stock, standard-compliant

Wide Size Range

Full sizes, ratings & materials

Ex-Stock, Dubai

Ready inventory, UAE & GCC delivery

Bulk & Wholesale

Project quantities at best price

Overview

RTJ ring joint gaskets for high-pressure flanges

A ring type joint gasket is a precision-machined metal ring. When the flanges are bolted up, the ring is forced into trapezoidal grooves in both faces and deforms plastically, creating a metal-to-metal line seal. To work, the ring must be softer than the flange groove, so material and hardness are selected against the flange: soft iron or low carbon steel for carbon steel flanges, stainless for stainless flanges.

Hamza Fasteners supplies R-series oval and octagonal rings for ASME B16.5 RTJ flanges, plus RX and BX rings for API 6A wellhead equipment. Typical users are oilfield service companies, refineries and pipeline contractors. Each ring is marked with its number and material. Send ring numbers, or flange size and class, to our Dubai office for a quote.

Technical Data

RTJ Ring Joint Gasket datasheet and specifications

Reference data for RTJ Ring Joint Gasket. Confirm exact size, rating and material for your order with our team.

This datasheet shows representative sizes for reference only. RTJ Ring Joint Gasket is supplied in the full range of sizes, ratings and materials — not a single option. Tell us what you need and we will confirm exact availability, specification and price.

Ring Numbers · ASME B16.20

R ring number by flange size and class

HAMZA FASTENERS
Reference
NPSClass 150Class 300 / 600
1"R15R16
1-1/2"R19R20
2"R22R23
3"R29R31
4"R36R37
6"R43R45
8"R48R49
10"R52R53
12"R56R57
Ring numbers per ASME B16.20 for B16.5 RTJ flanges. Classes 900 and above use different numbers on most sizes; confirm before ordering.
Datasheet · GK-RTJ

Product Specification

HAMZA FASTENERS
Rev. 01
Product TypeRing type joint gasket
MaterialSoft iron, low carbon steel, 4-6% Cr, SS 304 / 316
StandardASME B16.20, API 6A
ProfileR oval, R octagonal, RX, BX
Max HardnessSoft iron 90 HB; LCS 120 HB; SS 316 160 HB
FinishMachined, corrosion-protected
Never reuse an RTJ ring; the seating surfaces deform on first make-up.
Size
R11 – R105
Material
Soft iron / SS 316
Rating
Class 150 – 2500
Full range supplied — sizes, ratings & materials
Size Range
R11 to R105, RX & BX series
Materials
Soft iron, LCS, F5, SS 304, 316, alloys
Standards
ASME B16.20, API 6A
Pressure
Class 150 – 2500, API 2000 – 20000
Ends / Types
Oval, octagonal, RX, BX
Also Available
Spiral wound, CNAF, studs & nuts
Request Full Datasheet & Price Need a specific size, rating or material? Send us your requirement.
Applications

Where RTJ Ring Joint Gasket is used

Wellheads

API 6A RX / BX rings

Oil Pipelines

High-pressure flanges

Refineries

Hydrogen & HP lines

Offshore Platforms

Topside manifolds

Gas Compression

Compressor piping

Power Generation

HP steam flanges

Availability & Supply

RTJ Ring Joint Gasket supplier across the UAE, GCC and Africa

Stocked in Deira, Dubai and delivered fast across the region. Wherever you are building, we supply in stock and project quantities.

Hamza Fasteners is a trusted RTJ Ring Joint Gasket supplier in Dubai and across the United Arab Emirates — Abu Dhabi, Sharjah and Ajman — with regular export supply to Saudi Arabia (Riyadh, Jeddah, Dammam), Qatar (Doha), Kuwait City, Oman (Muscat) and key East and West African markets including Tanzania (Dar es Salaam), Kenya (Nairobi and Mombasa), Nigeria (Lagos) and Ethiopia (Addis Ababa). Looking for a "RTJ Ring Joint Gasket supplier near me" or the best price in your city? Send us your requirement for a same-day quote.

United Arab Emirates

  • Dubai
  • Abu Dhabi
  • Sharjah
  • Ajman

Saudi Arabia

  • Riyadh
  • Jeddah
  • Dammam

GCC

  • Doha, Qatar
  • Kuwait City
  • Muscat, Oman

Africa

  • Tanzania
  • Kenya · Nigeria
  • Ethiopia
FAQ

Common questions

Oval or octagonal?
Both seat in the same flat-bottom groove of modern RTJ flanges. Octagonal rings give higher sealing efficiency and are more common today; oval rings are still used, and are needed on older round-bottom grooves.
How do I choose the ring material?
The ring must be softer than the flange. Soft iron or low carbon steel suits carbon steel flanges; SS 316 rings are used with stainless flanges or corrosive media. Match the ring material to the service too.
What is the difference between R, RX and BX?
R rings are standard for ASME flanges. RX rings are pressure-energised and fit the same grooves as R rings in API 6B flanges. BX rings are for API 6BX flanges at higher pressures and are not interchangeable with R or RX.
Do you supply all ring numbers?
We supply the common R series from R11 to R105 plus RX and BX rings. Popular numbers in soft iron and SS 316 are held; others are sourced quickly. Each ring is supplied marked with its number and material for traceability.
How is RTJ ring gasket priced?
There is no single price, because size, material and quantity all change it, and ring number, type and material set the cost. Message us on WhatsApp with a list and we will quote from Deira stock and confirm what is ready for collection or delivery.
How quickly can you deliver RTJ gaskets?
Stock items can be collected in Deira or delivered in Dubai the same or next day, with other emirates following shortly after. Export orders to the GCC and Africa are packed and documented for the destination.

Need RTJ Ring Joint Gasket for your project?

Share the size, material, rating and quantity. We will confirm stock and send a quick quote with the datasheet and best price.

Email Us WhatsApp Enquiry Call Us sales@hamzafasteners.com · Deira, Dubai
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