Heatproof API 6A BX 156 Ring Gasket
The Ring Type Joint Gasket is initially developed for high
pressure/ temperature applications found in the petroleum industry
and is primarily used in the oilfield on drilling and completion
equipment.
However, today this product range can also be found on valves and
pipe work assemblies, along with some high integrity pressure
vessel joints.
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.
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”
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.
Thus Gasket supplies ring joint gaskets (RTJ Gasket) with the
hardness numbers as follows:
GASKET MATERIALS | BRINELL HARDNESS NUMBER (max) | ROCKWELL HARDNESS NUMBER (max) | IDENTIFICATION |
|---|
| Soft iron | 90 | 56 | D |
| Low carbon steel | 120 | 68 | S |
| 4-6% Chrome 1/2% molybdenum | 130 | 72 | F5 |
| 304 Stainless Steel | 160 | 83 | S304 |
| 316 Stainless Steel | 160 | 83 | S316 |
| 347 Stainless Steel | 160 | 83 | S347 |
| Material | Identification | Material No. | Hardness | Temperature (oC) |
| Min | Max. |
| Soft Iron | D | – | 90 | -40 | 500 |
| Low Carbon Steel | S | – | 120 | -40 | 500 |
| Stainless Steel 304 | 304SS | 1.4301 | 160 | -250 | 550 |
| Stainless Steel 304L | 304L SS | 1.4306 | 160 | -250 | 550 |
| Stainless Steel 316 | 316SS | 1.4401 | 160 | -100 | 550 |
| Stainless Steel 316L | 316L SS | 1.4404 | 160 | -100 | 550 |
| Stainless Steel 321 | 321SS | 1.4541 | 160 | -250 | 550 |
| Stainless Steel 347 | 347SS | 1.4450 | 160 | -250 | 500 |
| Stainless Steel 410 | 410SS | 1.4000 | 170 | -20 | 850 |
| Aluminum | Al | 3.0255 | 30 | -250 | 300 |
| Copper | Cu | 2.0090 | ca.80 | -250 | 400 |
| Brass | CuZn37 | 2.0321 | ca.60 | -100 | 350 |
| Nickel 200 | Ni200 | 2.4066 | 110 | -250 | 600 |
| Monel 400 | 400 | 2.4360 | 150 | -125 | 600 |
| Inconel 600 | 600 | 2.4816 | 150 | -100 | 950 |
| Hastelloy B2 | B2 | 2.4617 | 230 | -200 | 450 |
| Titanium | Ti | 3.7025 | ca.215 | -250 | 350 |
Marking and Identification (standard):
The outer surface of each Ring Type Joint should show the
manufacturer’s name or a trademark, the gasket number like R67,
RX37 or BX155, gasket’s material in abbreviation(check below our
chart), as well as the standards like ASME B16.20, API 6A, API 17D,
etc.
