What does RTJ flange mean?

Ring Type Joint
The RTJ flange (Ring Type Joint) is designed for high-pressure and/or high-temperature pipeline applications. This makes them the required standard in API specification flanges. Applications include oil field valves, pipework assemblies, and high integrity pressure vessel joints.

What is the difference between RF and RTJ flange?

Answer: RF means “Raised Face.” RTJ means “Ring Type Joint.” RF flanges seal with a flat gasket, formerly made of asbestos but now made of more environmentally friendly material, designed for installation between the raised faces of two mating flanges (both with raised faces).

How is RTJ flange measured?

The measuring is done by placing the device on the flange, moving the blocks so that the measuring balls touch the inner/outer side of the groove surface. Then the thumb screws are tightened so that the blocks are secured in place.

What is RTJ in valve?

A ring joint flanges (RTJ) is used when a metal-to-metal seal between the mating flanges is required (which is a condition for high-pressure and high-temperature applications, i.e. above 700/800 C°). A ring joint flange features a circular groove to accommodate a ring joint gasket (oval, or rectangular).

Can RF flange connect to RTJ flange?

RTJ Face flange can’t be matched with RF face, the main reason is the groove in the Raised face of RTJ. RTJ flanges have grooves in their sealing faces, while RF flanges do not.As usual,RTJ Flange need ring gasket.

Can RTJ gaskets be reused?

Coining deforms and yields the gasket hence its reuse will not reliably achieve the required seal….Is it safe then to reuse the gaskets only for hydrotest purpose.

Ring Gasket Material	Maximum Hardness for Ring Gaskets
Brinell	Rockwell “B” Scale
Type 410	170	86

Where are RTJ flanges used?

RTJ flanges are commonly used for high-pressure and high-temperature applications in oil field valves, pipework assemblies, refineries, high integrity pressure vessel joints, chemical and petrochemical plants, etc.

What is an RTJ connection?

A Ring type joint flange(RTJ) is a machined metallic ring with a deep groove cut into its face. This groove rests a metal ring which gets compressed when the connecting bolts of the flange are tightened. This compression results in a leak-proof, close-fitting seal on the pipe or connection.

Can we connect RF with FF flange?

The bolts must be gradually and uniformly tightened in a cross pattern, and the torque required for the chosen gasket must not be exceeded. In addition, RF monitor flanges cracked on installation are not warrantable. Elkhart Brass does not recommend connecting FF flanges to RF flanges. Some codes such as ASME B31.

Can a spiral wound gasket be used on a RTJ flange?

RTJ flanges have grooves in their sealing faces, while RF flanges do not.As usual,RTJ Flange need ring gasket. RF face request flat gasket, like spiral wound gasket. if RTJ Flange and RF Flange jointed together,only flat gasket can be used.

What does RF mean in flanges?

Raised Face
The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face.

Why should you never use again an old gasket?

Reusing a gasket is not advised as the saturation and absorbancy condition can vary. A gasket should be assembled, then exposed to heat and fluid. A used gasket already having swelling due to the fluids should not be reused.

What is RX and BX in gaskets?

Style RX is interchangeable with oval and octagonal ring gaskets, using the same flange, if the flange groove is flat bottom. Style BX gasket has a square cross section with beveled corners and is designed for use only in flanges API 6BX. Style BX is recommended for pressures from 5000 psi up to 20, 000 psi.

What is the difference between RX and BX ring gasket?

What gasket should you use on a flat face flange?

full face
Soft gaskets are cut to include or exclude the bolt holes. If the bolt holes are excluded, the gasket is termed a ‘flat ring’ gasket and should be used with a raised face flange. If the bolt holes are included, the gasket is termed a ‘full face’ gasket and should be used with a flat face flange.

Can you mate a RF flange to FF flange?

In addition, RF monitor flanges cracked on installation are not warrantable. Elkhart Brass does not recommend connecting FF flanges to RF flanges. Some codes such as ASME B31. 1 prohibit connecting FF flanges to RF flanges.

Should I put silicone on a gasket?

NEVER use silicone on both sides of the gasket, the gasket will slip and slide all over the place instead of staying put and clamping down. Another substitute for the high tack is Copper Coat (in the copper spray can). This works really well for head gaskets since it’s a light film.

What is R type gasket?

R-Type ring-joint gaskets maintain their integrity in for high pressure applications. These gaskets are available in ring numbers R11 to R105, 150lb – 5000lb pressure class.

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