Wenzhou Jingwei Seal Technology Co., Ltd. |
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We has more than 200,000 standard size ring joint gaskets in stock
and available for immediate shipment. These include all popular
sizes of “R”, “RX”, and “BX” style gaskets. Dan-Loc Group stocked
gaskets include Low Carbon Steel, F5, 304, and 316 materials.
We can offer more than 30 kinds of materials, such as 321SS, 347SS,
316SS, 304SS, Inconel 625, Monel 400, INCOLY 825, Nickel 200,
Duplex F44, soft iron, low carbon steel and so on. We have over 10
years experience in export business. Our products are sold to
Southeast Asia, Middle East, Europe and America and well
appreciated by our clients.
The BX type RTJ gaskets are manufactured in accordance with API 6A and are suitable for use in high pressure API 6BX flanges. The gaskets form a metal to metal seal on assembly and the efficiency improves as internal pressure increases. All BX sizes have a pressure relief hole to equalize pressure across sealing faces.
Type BX
–NB1 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”
As a result of metal to metal sealing media they are made to be free of indentations, tool marks etc and have a surface finish of maximum,
BX – 32 microinches Ra (0.8 micrometer Ra)
Type BX operates in 20,000 psi with non interchangeability. Type BX has a pressure passage hole for pressure equalization on each sealing face sides.
The hardness of the ring gasket should always be 30% lesser than the hardness of the flanges to prevent flange deformation
Dimensions and Tolerances for Ring Joint Gaskets and Grooves are covered in API 6A and ASME B16.20.
Ring type joint gaskets(RTJs) are designed for high pressure applications. They are available in a variety of forms to suit different flange formats . RTJs can be used for very high and/or fluctuating pressures (up to 1500 bar), depending on the profile selected. Material selection determines use for high temperatures (up to i000°C) and in aggressive media. To ensure proper sealing the surfaces of contact between the gaskets and flange have to be carefully processed. The small sealing area and high contact pressure results in excellent sealability.
Common Materials | |||
Material | HB Hardness | Temperature Limitations | Identification |
Soft Iron | 90 | -60 to +400 °C | D |
Low carbon steel | 120 | -40 to +500°C | S |
4%-6% Cr ½% Mo:F5 | 130 | -125 to +500°C | F5 |
Stainless steel 304/304L | 160 | -250 to +650°C | S304 or 304L |
Stainless steel 316/316L | 160 | -196 to +800°C | S316 or 316L |
Stainless steel 321 | 160 | -250 to +870°C | S321 |
Stainless steel 347 | 160 | -250 to +870°C | S347 |
Stainless steel 410 | 170 | -20 to +500°C | S410 |
Inconel 625 | – | 1000°C | 625 |
Incoloy 825 | – | 1000°C | 825 |
Hastelloy C-276 | – | 1000°C | C-276 |
Duplex | – | 800°C | S31803 |
Titanium | – | 540°C | TI |
In order to reduce turbulent flow in adjoining flanges and prevent
gasket/flange erosion Goodrich Gasket offers SPECIAL R, RX type
joints with PTFE inserts. We also offers Nitrile Rubber coated ring
joint gaskets (RTJ Gasket) used in pressure testing applications
and as a protection for flange grooves and surfaces. Ring joint
flanges with different ring groove diameters are sealed by
Transition Ring joints, a different size and same PCD combination
rings. Blind Ring joints, a standard ring joint with integral solid
metallic centers blanks off flanges and pipe work. Flange Guards of
closed cell neoprene foam readily compress under load protecting
outside diameter of Ring joints in corrosive environments.