Does the FLEX-R® (model TC96-R) include a secondary seal?
Yes, FLEX-R® assemblies can have a primary seal weld and a secondary seal weld from the thermocouple to the flange assembly at the face of the flange, not on a single disk, and again after the secondary containment chamber.
What is a secondary containment chamber?
The secondary containment chamber is a sealed chamber (neck tube) between the primary seal weld and secondary seal weld that contains an instrument connection. In the event of a primary weld failure, the secondary containment chamber would pressure up to operating pressure. An instrument valve and pressure gauge can be attached to the connection to provide indication of a pressure build-up. The connection also allows to internally pressure test the primary and secondary seal welds.
Is welding to the reactor needed in order to retrofit a FLEX-R®?
No, the FLEX-R® was developed to easily retrofit to existing reactors. The technology can be retrofitted, using proper supports, with attachment to non-pressure retaining elements of the reactor internals.
Can the FLEX-R® be installed in the reactor in the horizontal position?
Yes, the FLEX-R® can be installed in any position. However, care should be taken to ensure the internal structures are tightly secured in their proper position.
What design verification is provided with the FLEX-R® flange assembly?
ASME code calculations are performed to determine the suitability and sizing of the primary connection, the secondary connection, and the secondary containment chamber. All welds are liquid dye penetrant tested (LPI). The assembly receives an internal and external pressure test. Material Test Reports (MTR’s) and Positive Material Identification (PMI) can be provided with all process wetted material. WIKA is approved to build its products per code requirements and can administer a code “U” or code “R” stamp.
Does WIKA offer installation assistance?
Yes, we offer full service installation when there is a critical need to meet a fast schedule for installation. We can supply the personnel necessary to route, position, test and commission our assemblies. Alternatively, WIKA can also supply supervisory personnel for the installation.