Ring Type joint flange
Product Description
Ring type joint flange face surfaces are an increasingly popular option with regards to flange connections. RTJ Flanges are a good alternative to raised face in certain applications. Typically, higher pressure and temperature projects use Ring Type Joints. They provide a more effective sealing solution to media critical pipeline and pressure vessel infrastructure. Although only an option in ANSI/ASME class flanges, they are the required standard surface sealing in API specification flanges. This is due to the fact that API flanges typically operate at a higher pressure in comparison to their ANSI/ASME flange counterparts.
The seal of an RTJ gasket occurs under the force of closing the bolt and hardware after mating one flange to another. Typically, the gaskets are made of softer material than the metal of the flanges they are sealing. The most common of these materials is a soft iron. Slow and steady pressure on the hardware of the flange”crushes” the gasket within the ring joint surface. This helps to prevent any type of leakage during operation of the flange assembly.
Typical Applications
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food and food processing industries.
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sewage and water treatment plants.
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risers for oil platforms and pipelines.
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ships and marine equipment.
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pharmaceutical industry.
Weldability
Good
Availability
Key features
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Nice corrosion resistance
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Good abrasion resistance
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Low magnetism
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Long working life
Corrosion Resistance
Very Good
Machinability
Good / fair.
Stainless Steel Seamless Honed Tube specifications
Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629,
DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Chemical Composition (weight %)
| C | Si | Mn | P | S | Tensile strength kg/mm² |
Yield point kg/mm² |
Elongation% |
| 0.25 or less |
0.35 or less |
0.30 0.90 |
0.040 or less |
0.040 or less |
52 up | 39 up | 15 up |
| 38 up | 22 up | 30 up |
Mechanical Properties
| Grades | Delivery Conditions | Tensile Strength Rm (Mpa) | Elongation in the longitudinal direction Al (%) |
| St 45 | +A (GBK) | 390 min | 21 min |
| St 52 | +A (GBK) | 490 min | 22 min |
| E355 | +A (GBK) | 450 min | 22 min |
| 1020 | +A (GBK) | 390 min | 21 min |