RING JOINT (METAL GASKET)

RING JOINT GASKET
The RTJ standard size gaskets are manufactured in accordance to API6A and ASME B16.20 specifications. Total control of manufacturing processes ensures correct gasket surface and hardness to give a good seal without damaging flange connections. The hardness of the ring should always be less than the hardness of the flanges to provent flanges deformation. The sealing shrfaces on the ring joint grooves must be smoothly finished to 63 micro inches.
Type R Octagonal Applications: • Used for high pressure applications.	Typical Properties: • High integrity seal at high pressures • Suitable for fl at bottom groove fl anges • An improvement on the original oval RTJ design
Type R Oval Applications: • Used for high pressure applications.	Typical Properties: • High integrity seal at high pressures • Suitable for fl at and round bottom groove fl anges
Type RX Applications: • Used for high pressure applications • Interchangeable with Type R Octagonal joints	Typical Properties: • High integrity seal at high pressures • Suitable for fl at bottom groove fl anges • Pressure energised design improves effi ciency of seal with increasing internal pressure • Can be drilled to create “SRX” ring joint for subsea installation
Type BX Applications: • Used for high pressure API applications.	Typical Properties: • Pressure energised design improves effi ciency of seal with increasing internal pressure • Suitable for API 6BX fl anges • Can be drilled to create “SBX” ring joint for subsea installation
Standard : ANSI B16.5 Material : Soft Iron, Carbon Steel, / Stainless Steel Pressure & Ratings Ansi : 150LBS, 300, 600, 900, 1500, 2500 SIZE : 1/2" - 24"
Size/Pressure Class: ½” to 24” : 150 to 2500 ASME B16.20 26” to 36” : 300 to 900 ASME B16.47 Series A 1 ½” to 20” : API 6A		Syle R OVAL
Size/Pressure Class: ½” to 24” “ 150 to 2500 ASME B16.20 26” to 36” : 300 to 900 ASME B16.47 Series A 1 ½” to 20” : API 6A		Style R OCTAGONAL
A number of ring joint styles are available designed for specific flange types, these are:

Tabel Berat Ring Joint

Common Materials of RTJ
Material	Brinell Hardness Maximum	Temperature Limitation	Identification
Soft Iron	90	-60 to +400⁰C	D
Low Carbon Steel	120	-40 to +500⁰C	S
4%-6% Cr ½% Mo	130	-125 to +500⁰C	F5
Stainless Steel 304	160	-250 to +650⁰C	S304
Stainless Steel 316	160	-196 to +800⁰C	S316
Stainless Steel 321	160	-250 to +870⁰C	S321
Stainless Steel 347	160	-250 to +870⁰C	S347
Stainless Steel 410	170	-20 to +500⁰C	S410
Inconel 625	—	+1000⁰C	625
Incoloy 825	—	+1000⁰C	825
Hastelloy C276	—	+1000⁰C	C-276
Duplex	—	+800⁰C	S31803
Titanium	—	+540⁰C	Ti