RING JOINT GASKETS (RTJ’s)
Shuk only stock RTJ’s from API (American Petroleum Institute) accredited manufacturers.
Ring joint gaskets are precision machined metal sealing rings and are used in situations where the sealing requirements are extremely rigorous. They are therefore suitable for high pressure and high temperature applications such as mining, oil, gas, petrochemical and offshore industries. This product range is also used extensively on valves and pipework assemblies.
Ring joint gaskets are fitted in ring groove type flanges and are manufactured in accordance with API-6A and ANSI B16.2 specifications. The dimensions are standardized and require specially grooved flanges. The octagonal cross section has a higher sealing efficiency than the oval and would be the preferred gasket. RTJ’s have “R” numbers assigned to them for pipe size and pressure class identification. Stock materials include soft iron, low carbon steel, 4-6 chrome (f5), 304, 304L, 316, 316L, 347, Monel, Inconel and Incoloy.
RTJ’s come in three standard styles
The R-Type ring gasket can be ordered to two different profiles, oval or octagonal in cross-sections. Both types have identical pitch diameter as the flange groove they correspond to. These gaskets are used in pressures up to 10,000 PSI.
RX gaskets are designed for pressures up to 15,000 PSI. These gaskets are interchangeable with r-oval or r-octagonal rings used on API 6B flanges. RX type gaskets perform superbly in 6B flanged blowout preventer stacks, which require the additional mass of the RX gasket to support the higher pressures with higher vibrations and heavier weights of these units.
Although similar in style to the octagonal gaskets, the BX Series can only be used with 6BX flanges and 16BX hubs. BX-Gaskets have been designed for higher-pressure ratings starting at 5,000 lbs. and ending with 20,000 lbs. Pitch diameters on BX gaskets are slightly larger than the pitch diameter of the flange. This forces the gasket to initially seal on its outside angles and secondly seal with its inside angles as the flange is bolted down to respective torque settings.
SPIRAL WOUND GASKETS
Spiral wound gaskets have extremely strong sealing capacity and are used across many different industries; their versatility and the fact that they have the ability to handle temperature and pressure fluctuations mean that they can be adapted to suit most operating conditions and applications.
Spirals are ideal for very high pressure applications or in very corrosive or high temperature environments such as pipelines in the chemical and petroleum industries. The gaskets can seal fluid pressures up to 250 bar and have a temperature range of between minus 200ºC to 1000ºC.
Styles of Spiral Wound gaskets
Spiral Wound gaskets are manufactured in three styles, and all manufactured to ASME B 16.20 Standard.
Standard Gaskets – Carbon or S/S outer ring only.
This is the most common choice for RF and FF flanges.
Inner Ring Gaskets –As per Standard Gasket but with Inner ring also, usually S/S.
This is a standard gasket with an additional inner ring fitted to provide an additional compression stop. This construction means that the sealing element is protected from heat and corrosion. Inner rings are standard on all gaskets NPS 24” class900#, NPS 12” and above in 1500# and NPS 4” and above in 2500#. All spiral wound gaskets with PTFE filler have inner rings fitted.
Style R Sealing gaskets
These gaskets are sealing elements only, although they have several additional layers of winding strip for use in tongue and groove and male/female flanges. They are also available in oval, round and diamond shape for valve bonnet and handhole applications, 3.2mm and 4.5 mm thick.