Specifications 1-chemical compatibility with the media and the hardness of the flange

2-according to ASME B16.20 and API 6A

      Product Description   RTJ Ring Type Joints Metallic ring type joint gaskets are heavy duty, high-pressure gaskets largely used in offshore and onshore petrochemical applications. They are precision-engineered components designed to be used in conjunction with precision-machined flanges. All our Ring Joints are manufactured according to ASME B16.20 and API 6A.   The gasket material is selected on a number of grounds primarily; chemical compatibility with the media and the hardness of the flange. The gasket material ideally needs to be roughly 30 Brinell less than the flange material to ensure sufficient deformation of the gasket without damaging the flange facing.   Worn, pitted or corroded flange sealing surfaces can impede the sealing ability of RTJ gaskets. In such instances, a serrated octagonal RTJ gasket, covered with flexible graphite, can provide a temporary or emergency solution until the flange can be repaired or replaced.   The sealing surfaces on the ring joint grooves must be smoothly finished to 63 Microinches and be free of objectionable ridges, tool or chatter marks.   A number of ring joint styles are available designed for specific flange types, these are:

Style R
Style R Oval	Style R Octagonal
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 Applications: • Used for high pressure applications. Typical Properties: • High integrity seal at high pressures • Suitable for flat and round bottom groove flanges. Interchangeable on modern octagonal type grooved flanges.	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 Applications: • Used for high pressure applications. Typical Properties: • High integrity seal at high pressures • The octagonal cross section has a higher sealing efficiency than the oval and would be the preferred gasket • Suitable for flat bottom groove flanges

 

Style RX	Style BX
Size/Pressure Class: 1 ½” to 20” : 720 to 5000 API 6A Applications: • Used for high pressure applications. • The Style RX is designed to fit the same groove design as a standard style R making joints interchangeable • The Style RX has an increased height and utilizes the internal system pressure to energize and improve the seal as internal pressure increase • Suitable for flat bottom groove flanges	Size/Pressure Class: 1 11/16” to 30” : 2000 to 20000 API 6A Applications: • The Style BX energised ring type joint is manufactured in accordance with API 6A for use in high pressures. • Style BX ring type joints incorporate a pressure passage hole to allow for pressure equalization each side of the sealing faces. • Style BX is not interchangeable with any other style, and is only suited for API 6BX flanges .

  Material of RTJ

MAXIMUM HARDNESS
MATERIAL	UNS NUMBER	BRINELL	ROCKWELL B†	IDENTIFICATION
Soft Iron		90	56	D
Low Carbon Steel		120	68	S
4–6% Chrome 1/2% Moly	K42544	130	72	F5
Type 304 Stainless Steel	S30400	160	83	S304
Type 316 Stainless Steel	S31600	160	83	S316
Type 347 Stainless Steel	S34700	160	83	S347
Type 410 Stainless Steel	S41000	170	86	S410
Titanium Grade 2	R50400
Alloy 600	N06600	200
Alloy 625	N06625	200
Alloy 800	N08800	200
Alloy 825	N08825	160
Hastelloy	N10001	200
Alloy C276	N10276	200
SMO 254	S32154	180
Zeron 100		200
Super Duplex	S31803

      Packaging & Shipping   Packing Details     If you are interested in our products, please contact me in Ali and in Email and I will reply to you as soon as possible. My target of service is to satisfy your requirements. My Email: sales02 at rilson.com.cn Your success is my business.