Manufacturer of Inconel 625 Ring Type Joint Gaskets
Inconel 625 RTJ gaskets are high-performance metallic sealing solutions designed for high-pressure and high-temperature environments. They are primarily used in oil & gas, chemical processing, power plants, and marine applications due to their excellent corrosion resistance, high strength, and oxidation resistance.
Ring joint gasket is machined from solid metal in a variety of shapes according to API 6A & ASME B16.20 standards,it’s designed for high pressure ,high temperature or highly corrosive applications by selecting the most suitable material and shape. It is designed to with stand exceptionally high assembly loads over a small area, thus producing high seating stresses
Inconel Alloy 625 ,also known as N06625 is a low carbon (0.03%) nickel-chromium-molybdenum-niobium alloy which has excellent corrosion resistance to a wide range of corrosive media. Alloy 625 is normally supplied in annealed condition for wet corrosion applications 。
Chemical composition of Inconel 625
| C % | Si % | Mn % | P % | S % | Cr % | Mo % | Ni % |
| 0,03 | 0,4 | 0,5 | 0,01 | 0,01 | 21 – 23 | 8 – 10 | Rest |
| Al % | Co % | Nb + Ta % | Fe % | TI % | |||
| 0,4 | 1,0 | 3,2 – 3,8 | 5,0 | 0,4 |
The hardness of the ring gasket should always be 30% lesser than the hardness of the flanges,
Inconel 625 Ring gasket normally has a Hardness 200 HBW Max
Available RTJ Gasket Types & Dimensions
Inconel 625 RTJ gaskets are available in the following types:
| RTJ Type | Pressure Class | Groove Compatibility |
|---|---|---|
| R (Oval & Octagonal) | ASME 150-2500 | Standard RTJ flange |
| RX | API 6A (5,000-10,000 PSI) | Higher-pressure flange |
| BX | API 6BX (15,000-20,000 PSI) | API 6BX high-pressure flange |
Type R Oval & Octagonal
–NB1/2″ to 24″ Class Rating 150 to 2500 ASME B16.20
–NB26″ to 36″ Class 300 to 900 ASME B16.20 Series A
–NB1/2″ to 20″ Class API 6A
R Oval & Octagonal gasket ring Can be used on standard flat bottomed groove flanges and
older round bottomed groove flanges
R Oval & Octagonal gasket ring Can be used for ASME B16.5 flange class 150 to 2500 and
API 6B to Class 5000
»Soft iron and carbon steel gaskets are zinc plated to prevent
corrosion
» All rings are marked with the ring number, material and the
date of manufacture and API designation.
Type RX
–NB 1 1/2″ to 24″ Class Rating 720 to 5000 ASME B16.20
–NB26″ to 36″ Class Rating 300 to 900 ASME B16.20 Series A
–NB1 1/2″ to 20″ Class Rating API 6A
Interchangeable with Type R gaskets
» Pressure energised; as the internal pressure increases the
sealing force increases
» The outer sealing faces make initial contact with the slightly
» smaller flange groove allowing the gasket to impart
» additional sealing force
» Can be drilled with additional hole to create a gasket suitable
for subsea installation Type “SRX”
» Suitable for use on ASME B16.5, API 6B to Class 5000 and
ASME B16.47 Series A flanges
Type BX
–NB 11/16″ to 21 1/4″ Class Rating 5000 to 20000 ASME B16.20
» BX Ring gasket Suitable for use on API 6BX Flanges up to Class 20000
» During installation the ring is compressed inwards to provide
additional sealing stress
» Pressure energised; as the internal pressure increases the
sealing force increases
» Type BX rings are supplied with pressure relief holes to avoid
compressing fluid beneath the gasket
» Can be drilled with additional hole to create a gasket suitable
for subsea installation Type “SBX”
Why Inconel 625 RTJ Gaskets?
Superior Corrosion Resistance – Ideal for acidic, chloride-rich, and seawater environments
High-Temperature Stability – Performs well up to 1093°C (2000°F)
Long Service Life – Prevents failure in extreme pressure and thermal cycling
Excellent Strength & Hardness – Ensures tight, leak-free sealing
Typical order Description for the N06625 ring gsket
RING JOINT GASKET-RJG-ALLOY STEEL (INCONEL 625) RING JOINT GASKET DIM AS PER ASME B16.20/API6A (HARDNESS: 190 BHN MAX)
