NT216C GB1
15 / 26
6 - PROBES INSTALLATION
– General Procedures.
The MiniSonic ISD & PSD accept all standard or special transducers of Ultraflux
catalogue with frequency from 250 KHz up to 2 MHz : clamp-
on , insertion or wetted…
Unless specified and instructed otherwise in the order, refer to the probe data sheet
of the model used .
The installation of the probe(s) does
n’t require any straight length upstream or
downstream and is not sensitive to flow profiles. Only avoid to place probe on a bend
or too near a pipe welding
Similarly, to avoid the nuisance of deposits or accumulation of gas, planes close to
vertical (+/- 30°) will be avoided. A horizontal plane or a 45° plane is good choices.
We usually promote
external probes
to be clamped on the pipe. They normally are
suitable for all petroleum liquid products to be delivered by pumping through pipelines.
Only primary choice with our sales department or agent must be concerning probe
frequency (small pipe and not viscous product > higher frequency is better) and
sometimes to decide if two probes mounted as a barrier would be better (large pipe
and very viscous oil) . By default we use F = 1 MHz.
Particular attention will be paid to cleaning the pipe at the probe(s) location. Remove
all old paints.
The probe body has no contact with internal wires. It should preserve pipe-line
cathodic protection. Anyway, control insulation and insure it will be preserved.
A first test or provisional installation can be done with gel or grease coupling.
When location is validated , install probe support ( if any) and do definitive coupling by
placing our solid tape with some grease on both sides between probe face and pipe
and tight all together by screwing strap attach or support plate .
When there are two probes to do a barrier, please check first their correct lining.
For Pig Detection in Gas pipelines, we recommend to install
insertion transducers
,
flanged type or to be installed by hot tapping.
Apart the safety conditions to be respected during installation, the highest attention
must be put to have probe support perfectly perpendicular to the pipe at its location
point.
The second attention is to don’t have the probe face penetrating inside the pipe to
prevent any damage from the pig passages.
