APT3700N Smart Pressure Transmitter for Nuclear Service Operation Manual M3700N-K01E
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The transmitter Flange's basic standard is 1/4-18 NPT, and the nuclear power
plant's basic standard uses 3/8-in. (The nuclear power plant's basic standard is
given to the Buyer. Reference to KHNP's Technical Specification 9-183-J230C)
Transmitter Flung type is divided into Differential, Gage, and Absolute, with the
manufacturer's basic standard shipped as 1/4-18 NPT.
There should be not water leak at the scene when connecting the pipelines when using
the connecter of 3/8-in by the Buyer, and also should use shorter pipelines. As for
sealing the pipelines, we prohibit using Teflon when the environment is poor.
There should be no pressure between process and the transmitter, a water leak
from pressure, the density change between the temperature change of High and
Low of an attachment, and if the certain item is liquid that can change to gas,
the error should be minimum.
Especially with the attachment, we should consider the following.
- We should keep both temperatures of both High and Low.
- If it is sea water, the water level should be the same for both High and Low
pipelines.
- It is not allowed to Purge while transmitting while Purging, and the transmitter
should be installed considering this, and the transmitter should physically use the
locking mechanism of the High and Low.
2.3.2. Conduit
The transmitter's pipe standard uses 1/2-14 NPT. When connecting the pipes,
consideration is as follows.
- The moisture should be prevented that can happen inside the housing terminal
whether it functions accordingly or during an accident.
- There should be protection of a technical stress to the transmitter during an
earthquake.
- Installation should follow such as [Figure 3. Transmitter Installation Example]
(maker's choice) or refer to the installation of the professional company's
specifications.