Ring Joint Gasket

Product Description

Description:

Ring joint gaskets are solid metal gasket that is highly polised and softer than the flange material. The gasket is actually ‘crushed’ into flange (coining & intimate contact), creating a seal by filling imperfections and leak paths with gasket material. Under high sealing stress the gasket will deforms but the flange will not. They are used predominantly in the petrochemical industry (offshore oil platforms, refineries) due to the high service pressures required in their processes. Ring joing gaskets are precision engineered and machined to exact specifications with tight tolerances(ASME B16.20, API 6A).

Application:

KXT-G1800 ring joint gaskets are metallic sealing rings suitable for high pressure and high temperature applications and are fitted in ring groove type flanges.They are widely used in the Oil / Petrochemical industry and in valves and pipe work. Choice of material may be determined to suit higher temperatures and aggressive media.

Ancillary Components:

Sometimes,the sealing fluid and working condition is special.We need to add some ancillary components.Then the sealing effect will be better:

● PTFE inner rings

- for sitting in the cavity between flange bore and ring joint to reduce turbulence and flange erosion.

● Flange protectors

- for installation around the external diameter of flange joint to minimise ingress of moisture and dirt.

● Rubber coated ring joints

- soft iron ring joint gaskets encapsulated in nitrile rubber for testing wellhead assemblies and valves. Rings can be reused and do not damage flange grooves.

The Gaskets Are Available In 3 Types:

	STYLE R:R type ring joint gaskets are available in oval or octagonal cross section and manufactured in accordance to API 6A and ASME B16.20 to suit API 6B and ASME / ANSI B16.5 flanges.The oval ring fits the round AND flat bottom ring groove flange while the octagonal shape fits only the modern flat bottom groove flange.
	STYLE RX:The RX type RTJ gasket is manufactured in accordance to API 6A and ASME B16.20 to suit API 6B and ASME / ANSI B16.5 flanges. The RX is a pressure energized version of the R octagonal gasket and fits the R type flat bottomed groove.The RX has an increased height and utilizes the internal system pressure to energize and improve the seal as internal pressure increase. Some RX sizes have a pressure relief hole to equalize pressure both sides of the sealing faces.
	STYLE BX: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.

Material of RTJ:

Material	Maximum Hardness		Temperature（ ℃ ）	Abbreviations
Material	Brinell	Rockwell“B”Grade	Temperature（ ℃ ）	Abbreviations
Soft Iron	90	56	-60～500	D
Low Carbon Steel	120	68	-40～540	S
SS304	160	83	-250～540	304
SS304L	160	83	-250～540	304L
SS316	160	83	-200～815	316
SS316L	160	83	-200～815	316L
SS321	160	83	-200～870	321
SS347	160	83	-200～870	347
SS410	170	86	-40～850	410
5Cr-0.5Mo	130		-29～650
Copper	80		-100～315
Aluminum	35		-200～425
Inconel 600	150		-100～1095
Incoloy 825	150		-100～1095
Monel 400	150		-100～760
Titanium	215		-200～540
Nickel 200 -	110		200～760
Hastelloy B2	230		-100～1095
Hastelloy C276	210		-100～1095

Warning:

Gasket materials should never be recommended when both the temperature and the pressure are at the maximums listed. Properties and applications shown are typical. No application should be undertaken by anyone without independent study and evaluation for suitability. Never use more than one gasket in one flange joint, and never reuse a gasket. Improper use or gasket selection could cause property damage and/or serious personal injury. The data reported is a compilation of field testing, field service reports and/or in-house testing. While the utmost care has gone into publishing the information contained herein, we assume no responsibility for errors. The information and specifications contained in this website are subject to change without notice. This revision cancels and obsoletes all previous editions.

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