Inline and on Line Instruments

7/23/2019 Inline and on Line Instruments

1/9

Inline and OnlineInline and Online

InstrumentsInstruments


2/9

In-line instrumentsIn-line instruments::

In-line instruments are considered to be allIn-line instruments are considered to be all

instruments and components direct -mountedinstruments and components direct -mountedin or on process and utility lines or equipmentin or on process and utility lines or equipment

and which are subjected to the pressures andand which are subjected to the pressures and

temperatures of the piping systems ortemperatures of the piping systems or

equipment in or on which they are installed.equipment in or on which they are installed.


3/9

Typical examples:T

ypical examples:

MeasurementMeasurement Types of InstrumentTypes of Instrument

FlowFlow Turbine and ! meters with their accessories" orifice andTurbine and ! meters with their accessories" orifice and

restriction orifice plates" #enturi" #ortex flow meters"restriction orifice plates" #enturi" #ortex flow meters"

$oriolis mass flow meters" ultrasonic flow meters" magnetic$oriolis mass flow meters" ultrasonic flow meters" magnetic

flow meters" thermal mass flow meters.flow meters" thermal mass flow meters.

%e#el%e#el !isplacer type le#el instruments" capacitance le#el!isplacer type le#el instruments" capacitance le#el

instruments" tan& gauges" radar gauges.instruments" tan& gauges" radar gauges.

'uality'uality (nalyser sample probes(nalyser sample probes

- )al#es- )al#es $ontrol #al#es" including IF #al#es" depressuring$ontrol #al#es" including IF #al#es" depressuring

#al#es" deluge #al#es.#al#es" deluge #al#es.


4/9

For in-line instruments" the traceability andFor in-line instruments" the traceability and

associated material certification for pressureassociated material certification for pressure

retaining parts *including bolting of pressureretaining parts *including bolting of pressureretaining parts+ shall be in accordance with theretaining parts+ shall be in accordance with the

requirements of the piping class or equipmentrequirements of the piping class or equipment

in or on which the instruments are installed.in or on which the instruments are installed.


5/9

,n-line instruments,n-line instruments::

,n-line instruments are all instruments and,n-line instruments are all instruments and

components connected to process and utilitycomponents connected to process and utility

lines or equipment #ia small *maximumlines or equipment #ia small *maximum

! /+ bloc& #al#es.! /+ bloc& #al#es.

They are subjected to the pressures of theThey are subjected to the pressures of the

piping systems or equipment on which theypiping systems or equipment on which they

are installed.are installed.


6/9

Typical examples are impulse line components"Typical examples are impulse line components"transmitters" pressure gauges" analyser samplingtransmitters" pressure gauges" analyser samplingsystems" etc.systems" etc.

ressure or differential pressure instruments thatressure or differential pressure instruments thatrequire diaphragm seals are not considered to be on-require diaphragm seals are not considered to be on-line instruments unless the si0e of the diaphragm sealline instruments unless the si0e of the diaphragm sealma&es it necessary to use a line class shut-offma&es it necessary to use a line class shut-off#al#e.#al#e.

1nless otherwise specified by the rincipal" no1nless otherwise specified by the rincipal" nomaterial certification is required for on-linematerial certification is required for on-line

instruments and their connections to processinstruments and their connections to processsystems" pro#ided that facilities are present tosystems" pro#ided that facilities are present toisolate these instruments and connections from theisolate these instruments and connections from the

processprocess


7/9

(s an exception to this rule" material(s an exception to this rule" material

certification is required for the following:certification is required for the following:

(ll impulse line tubing.(ll impulse line tubing.

ressure retaining parts of instrumentsressure retaining parts of instruments

and impulse line components in 23our2 orand impulse line components in 23our2 or

24et 5 632 ser#ice *as defined in ($7+.24et 5 632 ser#ice *as defined in ($7+.


8/9

,ff-line instruments,ff-line instruments::

,ff-line instruments are considered to be all,ff-line instruments are considered to be allinstruments and components which are not in directinstruments and components which are not in directcontact with any process medium or which are notcontact with any process medium or which are notconnected to any process8utility line or equipment.connected to any process8utility line or equipment.

Typical examples are thermocouples" resistanceTypical examples are thermocouples" resistanceelements and bi-metallic thermometers inelements and bi-metallic thermometers inthermowells" signal con#erters" local recei#ingthermowells" signal con#erters" local recei#ingindicators" etc.indicators" etc.

1nless otherwise specified by the rincipal" no1nless otherwise specified by the rincipal" nomaterial certification is required for off-linematerial certification is required for off-lineinstruments.instruments.


9/9

Documents

Inline and on Line Instruments