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Roxar Sacrificial Probe User Manual
User Manual
ROXA20034733
March 2019
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User Manual Contents
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Contents
Chapter 1 Introduction.................................................................................................................. 5
1.1 Conformity to standards...................................................................................................................5
1.2 Warnings..........................................................................................................................................5
1.3 Acronyms and definitions................................................................................................................. 5
1.4 Personnel qualifications and safety...................................................................................................5
1.5 Warranty restrictions........................................................................................................................6
1.6 Additional documentation and resources......................................................................................... 6
1.7 Assistance........................................................................................................................................ 6
Chapter 2 Technical description..................................................................................................... 7
2.1 Roxar Sacrificial Probe...................................................................................................................... 7
2.2 Main components............................................................................................................................ 9
2.3 Specifications and dimensions........................................................................................................12
Chapter 3 Preparation..................................................................................................................13
3.1 Tools.............................................................................................................................................. 13
3.2 Consumables..................................................................................................................................14
Chapter 4 Operating instructions................................................................................................. 15
4.1 Roxar Sacrificial Probe (Retrievable)................................................................................................15
4.2 Roxar Sacrificial Probe (Non-retrievable).........................................................................................15
Chapter 5 Maintenance................................................................................................................17
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User Manual
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Introduction
1 Introduction
This manual provides general information and procedures for using the Roxar Sacrificial
Probe, and is intended for use by qualified personnel. The information presented in this
manual is not specific to a particular application, installation or process, and must be
evaluated on a case-by-case basis by the operator. Contact Emerson for more information.
1.1 Conformity to standards
This document has been issued in compliance with the most common international
standards for user manual documentation.
1.2 Warnings
WARNING
The instructions and procedures described in this document may require special
precautions to ensure the safety of the personnel performing the operations. Information
that potentially raises safety issues is indicated by a warning symbol followed by a safety
message.
1.3 Acronyms and definitions
Acronym Definition
PPE Personal Protective Equipment
MSDS Material Safety Data Sheet
1.4 Personnel qualifications and safety
You must read and follow all instructions, warnings and cautions to avoid personal injury
or damage to property during system operation. Emerson is not responsible for damage or
injury resulting from unsafe use of the product, lack of maintenance, incorrect installation
of equipment, or system operation. Contact Emerson if you have questions about any
applications and safety precautions described in this manual.
Ensure that operators working on the equipment are following the end-user guidelines on
the use of protective equipment including, but not limited to the following:
• Safety helmet/hard hat
• Steel-toed shoes
• Safety glasses
• Working gloves (suitable for mechanical operations)
• Chemical resistant latex gloves, or equivalent
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• Long sleeved fire-retardant shirt and fire-retardant trousers, or full-length fire-
retardant coveralls
Additional Personal Protective Equipment (PPE) may be required depending on facility
requirements and Material Safety Data Sheet (MSDS) requirements. Failure to do so may
result in personnel injury.
1.5 Warranty restrictions
You must visually inspect all components for shipping damage and notify the carrier, if you
find any shipping damage. Shipping damage is not covered by the warranty. The carrier is
responsible for all repair and replacement costs resulting from shipment damage.
1.6 Additional documentation and resources
• ROX000295904 - Roxar Mechanical Retrieval Tool User Manual
• ROX000337352 - Roxar Hydraulic Retrieval Tool User Manual
1.7 Assistance
The Roxar Global Service Centre is organized through a network of service centers
worldwide, and supports all service requirements or technical queries.
For the Product Support Help Desk, contact Roxar.GSC@Emerson.com.
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User Manual Technical description
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2 Technical description
The term "probe" is collective noun for the equipment used to provide information relating
to process changes and their effect on metal loss from corrosion and/or erosion. There are
different types of probes with different measurement techniques.
This manual describes the Roxar Sacrificial Probe. Contact Emerson for more information
on other types of Roxar probes.
2.1 Roxar Sacrificial Probe
The early detection of sand production in fields is one of the biggest challenges faced by
oil and gas companies. High sand production can cause damage to pipes and instruments,
pose a safety risk, and be very costly for operators. Therefore, the early warnings and
detection of erosion is crucial for operators. The Roxar Sacrificial Sand Probe is used to
provide information when sand erosion has exceeded the element thickness of the probe,
in order to avoid erosion damage, or control sand production.
The Roxar Sacrificial Probe is an intrusive sand probe that consists of a hollow tube and a
holder. The Roxar Sacrificial Probe is inserted into a high velocity flow, and an indication is
given by a pressure gauge, or a pressure transmitter, once the pressure has penetrated the
sacrificial tube due to the wear caused by sand and other particles in the flow.
The Roxar Sacrificial Probe can be installed in two ways:
• The Roxar Sacrificial Probe (Retrievable) is installed in an tee-type 2 in access fitting.
• The Roxar Sacrificial Probe (Non-retrievable ) is installed in taps welded directly onto
the pipe or vessel (welding bosses or threadolets).
Note
If the Roxar Sacrificial Probe is installed in an tee-type 2 in access fitting system, the probe
can be retrieved and replaced without any interruptions to the mainstream flow, or the
need to depressurize the pipe.
The sensing element of the Roxar Sacrificial Probe consists of a tube made from corrosion
resistant material. The tube is closed at one end and threaded at the other end to mate
with the probe nut. The nut enables the Roxar Sacrificial Probe to be attached to a solid
plug and used in a Roxar Access Fitting Assembly with a tee.
Emerson recommends placement of the probe within the pipeline, so that the midpoint of
the sacrificial tube is placed approximately 60% into the pipeline diameter (ID). This
placement allows for maximum theoretical sand impingement at center of line where the
sand concentration and flow rates are often greatest. It also allows for heavier suspended
participles flowing slightly lower in the flow stream to also contact the sacrificial tube.
If there is sufficient flow velocity, the effect of sand and solids erodes through the
Sacrificial Probe sensing element over time, and exposes the sealed system to the working
pressure of the line. The pressure passes through a valve assembly and is registered by the
pressure gauge.
The Non-retrievable sacrificial system is available in a fixed configuration and can only be
removed and replaced when the process line is not exposed to pressure. The Retrievable
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sacrificial system can be removed and replaced under full operation, with the support of
the Roxar Mechanical Retriever Tool or the Roxar Hydraulic Retriever Tool.
Figure 2-1 shows the different ways in which the Roxar Sacrificial Probe can be installed.
Figure 2-1: Roxar Sacrificial Probe Assembly
A. Sacrificial Probe Assembly (Retrievable) mounted in a tee-type flareweld mechanical
access fitting
B. Sacrificial Probe Assembly (Retrievable) mounted in a tee-type flanged hydraulic access
fitting
C. Sacrificial Probe Assembly (Non-retrievable) mounted in a threadolet
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User Manual Technical description
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2.2 Main components
The Roxar Sacrificial Probe (Retrievable) system in a 2 in tee-type hydraulic flanged access
fitting consists of the following parts:
Figure 2-2: Complete Hydraulic Retrievable Sacrificial Probe Assembly
A. Plug
B. Injection nut
C. Cover
D. Locking pins
E. Pressure gauge
F. Tee-type 2 in access fitting
G. Flanged connection
H. Sacrificial Probe
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Figure 2-3: Complete Mechanical Retrievable Sacrificial Probe Assembly
Figure 2-3 shows a Retrievable Sacrificial Probe system in a tee-type 2 in mechanical
flareweld access fitting.
A. Plug
B. Injection nut
C. Cover
D. Shut-off valve
E. Pressure gauge
F. Tee-type 2 in access fitting, flareweld
G. Sacrificial Probe
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Figure 2-4: Complete Roxar Sacrificial Probe (Non-retrievable) Assembly
Figure 2-4 shows the parts of a Roxar Sacrificial Probe (Non-retrievable).
A. Pressure gauge
B. Shut-off valve
C. Threadolet or welding boss
D. Sacrificial Probe
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2.3 Specifications and dimensions
Specifications Value
Probe body material Stainless Steel AISI 316L/316 (dual certification)
Diameter of sacrificial tube Ø16 mm
Wall thickness of sacrificial tube 1 mm
Probe length From 80 mm to 390 mm (depending on the
type of probe)
Probe installation in pipe Installed approximately 60% into the pipe
diameter (ID)
Maximum operating temperature 204 °C
Maximum operating pressure 6,000 psi
Mechanical interface ½ in NPT (retrievable) and ¾ in NPT (non-
retrievable)
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User Manual Preparation
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3 Preparation
This section describes the prerequisites and preparations (including observations) to be
carried out before installing the different parts of the equipment. The instructions cover
the following equipment:
• Roxar Sacrificial Probe (Retrievable and Non-retrievable)
• Injection nut
You can install the Roxar Sacrificial probe in two ways:
• Manually, by using hand tools before the system starts up, or during shut down when
the line or vessel is empty and depressurized.
• By using a special retrieval tool during full operational conditions of the system. For
more information, see Additional documentation and resources.
Note
The guidelines provided in this manual are based on the 2 in hydraulic or mechanical
system that is being operated. If you are using a retrievable system, make sure you read
and follow the instructions in the user manual of your system, including the
recommendations for spare parts.
3.1 Tools
Retrievable Probe with tee-type 2 in access fitting system
In addition to the tools listed in the manuals for the applicable Retriever Tool (mechanical
or hydraulic), you will need a 23 mm spanner to assemble the Sacrificial Probe into the
injection nut.
WARNING
DANGER TO PERSONNEL AND EQUIPMENT. Make sure that the length of retriever tool
available for the operation is compatible with the length of the Sacrificial Probe.
Non-retrievable Probe
You will need a 23 mm spanner to assemble the Roxar Sacrificial Probe into the pipe tap. A
set of two adjustable spanners is also required to assemble the shut-off valve and the
pressure gauge (or pressure transmitter, if applicable).
WARNING
DANGER TO PERSONNEL AND EQUIPMENT. Installation or replacement of a nonretrievable probe requires a depressurized, drained and ventilated pipe or vessel.
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3.2 Consumables
You do not need any additional consumables for non-retrievable sacrificial probes that are
installed in a welding boss or threadolet.
If the probe is installed in a retrievable type 2 in access fitting, you will need the spare parts
that are listed under operational instructions for the applicable retriever tool (mechanical
or hydraulic).
In addition, a new probe and the following spares shall be available:
Figure 3-1: Consumables for Roxar Sacrificial Probe Nut (Retrievable)
A. Position 1
B. Position 2
C. Position 1
3.2.1
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Part numbers for consumables
Position Description Material Part number
Pos.1 Backup ring PTFE ROX000323092
Pos.2 O-ring VITON 75 ROX000278467
FKM938 ROX000323093
HNBR90 ROX000342560
ELAST-O-LION ROXA20035755
FR25/90 ROX000339898
FKM 75 ROXA20035756
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User Manual Operating instructions
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4 Operating instructions
Introduction
Generally, the Roxar Sacrificial Probe is operated only during the replacement of probe
itself. Due the nature of the sensor, a local indication is provided by the pressure gauge (or
a signal is sent to control room, if a pressure transmitter is applied) once the probe tube is
eroded. That means if 1 mm of metal loss is eroded, the rate can be calculated by dividing
the thickness of the tube (1 mm) by the time that elapsed since the probe was exposed to
flow and until the indication came on the pressure gauge.
It is important to highlight the importance of replacing the Sacrificial Probe as soon as
there is metal loss due to erosion, which must be taken into consideration for assessment
of pipe integrity and future production of the actual well.
4.1 Roxar Sacrificial Probe (Retrievable)
Note
To replace a Roxar Sacrificial Probe (Retrievable) installed in a 2 in access fitting, refer to
the user manuals for the applicable retriever tool and 2 in access fittings.
After you have retrieved the plug, injection nut and probe, replace the sealing device at
the plug, the O-ring and the back-up ring at the injection nut and the Sacrificial Probe.
The Sacrificial Probes are equipped with NPT threads. This means the threads have a
tapered design, and in most cases that is enough to seal the connection. In order to
prevent spiral leakage and avoid galling, Emerson recommends that you use some type of
sealant (tape or paste) and apply the sealant to the male thread only.
When using the tape sealant, wrap the threads in a clockwise motion starting at the first
thread. As the layers are applied, work towards the imperfect (vanishing) thread. If the
system that the connection being made to cannot tolerate foreign matter, leave the first
thread exposed and apply the tape sealant as outlined above.
When using paste sealant, apply to the threads with a brush, using the brush to work the
sealant into the threads. Apply enough sealant to fill in all the threads all the way around.
Follow the instructions on retrieval procedure to install the probe into the pipe.
4.2 Roxar Sacrificial Probe (Non-retrievable)
To replace a Roxar Sacrificial Probe (Non-retrievable), you must first depressurize and drain
the pipe. Once the pipe is confirmed to be depressurized and drained, unscrew the
pressure gauge (or pressure transmitter), the shut-off valve and the eroded probe.
The Sacrificial Probes are equipped with NPT threads. This means the threads have a
tapered design, and in most cases that is enough to seal the connection. In order to
prevent spiral leakage and avoid galling, Emerson recommends that you use some type of
sealant (tape or paste) and apply the sealant to the male thread only.
When using the tape sealant, wrap the threads in a clockwise motion starting at the first
thread. As the layers are applied, work towards the imperfect (vanishing) thread. If the
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system that the connection being made to cannot tolerate foreign matter, leave the first
thread exposed and apply the tape sealant as outlined above.
When using paste sealant, apply to the threads with a brush, using the brush to work the
sealant into the threads. Apply enough sealant to fill in all the threads all the way around.
Install the new probe into the existing pipe tap, followed by the shut-off valve and pressure
gauge (or pressure transmitter).
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User Manual Maintenance
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5 Maintenance
The Roxar Sacrificial Probe does not require any maintenance during normal operational
conditions.
Emerson recommends limited routine inspections to ensure that there are no visual
damages on pressure gauges, covers, shut-off valves and access points.
WARNING
DANGER TO PERSONNEL AND EQUIPMENT. Do not remove the pressure gauge or the
pressure transmitter with the shut-off valve on its open position, even if the probe is still
sealed, and the pressure indication is zero.
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Roxar
Head Office Roxar products:
+47 51 81 8800
info.roxar@emerson.com
CIS: +7 495 504 3405
Europe: +47 51 81 8800
North America: +1 281 879 2300
Middle East: +971 4811 8100
Asia Pacific: +60 3 5624 2888
Australia: 1 300 55 3051
Latin America:
Portuguese: +55 15 3413 8888
Spanish: + 52 55 5809 5000
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©
2019 Roxar AS. All rights reserved.
The Emerson logo is a trademark and service mark of Emerson Electric Co. Roxar is a trademark of
Roxar ASA. All other marks are property of their respective owners.
Roxar supplies this publication for informational purposes only. While every effort has been made to
ensure accuracy, this publication is not intended to make performance claims or process
recommendations. Roxar does not warrant, guarantee, or assume any legal liability for the accuracy,
completeness, timeliness, reliability, or usefulness of any information, product, or process described
herein. All sales are governed by our terms and conditions, which are available on request. We
reserve the right to modify or improve the designs or specifications of our products at any time
without notice. For actual product information and recommendations, please contact your local
Roxar representative.
Roxar products are protected by patents. See http://www.emerson.com/en-us/automation/brands/
roxar-home/roxar-patents for details.
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