1 Scope ……………………………………………………………………………………………………………………………
2 General …………………………………………………………………………………………………………………………
3 Addenda ………………………………………………………………………………………………………………………..
Section 1 – General…………………………………………………………………………………………………………….
Conflicting Requirements …………………………………………………………………………………………………
Section 2 – References ……………………………………………………………………………………………………….
Section 3 – Definitions…………………………………………………………………………………………………………
Section 4 – General Design Specifications …………………………………………………………………………….
4.7 Scope of Supply and Responsibility …………………………………………………………………………….
Section 5 – Conventional Hardware ……………………………………………………………………………………
5.1 Radial Shaft Vibration, Axial Position, Phase Reference, Speed Sensing, and Piston Rod Drop Transducers. ………………………………………………………………………………………………………….
5.2 Accelerometer Based Casing Transducers …………………………………………………………………..
5.4 Monitor Systems ……………………………………………………………………………………………………….
5.5 Wiring and Conduits………………………………………………………………………………………………….
5.7 Field Installed Instruments ………………………………………………………………………………………….
6.3 Identification of Transducers and Temperature Sensors. ………………………………………………
7.3 Testing ………………………………………………………………………………………………………………..
7.5. Mechanical Running Test ………………………………………………………………………………………..
7.6. Field Testing ………………………………………………………………………………………………………….
4 Revision History ……………………………………………………………………………………………………………
1 Scope
American Petroleum Institute (API) standard 670, Fourth Edition, dated December, 2000
Reaffirmed November 2010 is adopted as a SABIC Engineering Standard (SES) with the
following addendum.
2 General
Machinery Protection Systems (MPS) measuring radial shaft vibration, casing vibration, shaft
axial position, shaft rotational speed, piston rod drop, phase reference, over speed and critical
machinery temperatures (such as bearing metal and motor windings) shall conform to API 670,
Fourth Edition except as modified herein, or as set forth on the Data Sheets, Project
Specifications or by the Purchase order.
3 Addenda
The following section, sub-section and paragraph numbers refer to API 670, Fourth Edition.
Section 1 – General
Conflicting Requirements
Any conflict(s) between this standard, SES and any other industry standards, engineering
documents and drawings, and contract documents shall be resolved at the discretion of SABIC.
Section 2 – References
Add the following new paragraph:
Following documents are part of this addendum. The latest issues, amendments, and
supplements to these documents shall apply unless otherwise indicated.
SABIC Engineering Standards (SES)
E02-E02 Hazardous Area Classification
E02-G01 Electrical System Design Criteria
G06-S02 Special Purpose Steam Turbines
R11-C01 General Instrument Installation Criteria
R11-C02 Standard Installation Drawing-Instrumentation
X01-E01 Control System Design Criteria
X02-G01 Distributed Control System Implementation Guidelines
X03-G01 Safety Instrumented System Implementation Guidelines
X03-S01 Safety instrumented System Logic Solver Specificaion
X04-S04 Machinery Monitoring System Specifiction
X05-E01 Process Control Cabling and Wiring Guidelines
X05-E02 Field Device cabling to Junction Boxes
X05-S01 Process Control Cable Specification
X05-S02 Local Control Panel Specification
International Electro technical Commission (IEC)
IEC-61000-4-2 EMC Electrostatic discharge immunity tests
IEC-61000-4-3 EMC Radiated, radio frequency, electromagnetic field immunity tests
IEC-61000-4-4 EMC Electrical fast transient-burst immunity tests
IEC-61000-4-5 EMC Surge immunity test
IEC-61000-4-6 EMC Immunity to conducted disturbances, induced by radio-frequency fields
Section 3 – Definitions
3.49 Modify the paragraph as follows:
Peak-to-peak value is the difference between positive and negative extreme values of an
electronic signal or dynamic motion. Peak-to-peak values factored from any other measurement
are not acceptable.
3.61 Modify the paragraph as follows:
Root mean square or RMS is the square root of the mean of the square of the sample values.
RMS values factored from any other measurement are not acceptable.
3.80 Add the following new paragraph:
Machinery Management System (MMS) – A Computer based data collection system which
communicates directly to the machinery protection system and to other plant information
devices such as Process Measurement Transmitters, DCS, PLC, Management Information
Systems (MIS) and Plant Historians to extract machinery dynamic motion signals and static
machine process parameters. The computer shall collect, store, process, display and print the
machinery management data in a variety of format. This data will be typically used for historical
trending, machinery diagnostics and predictive maintenance purposes, not for machinery
protection.
3.81 Add the following new paragraph:
Safety Instrumented System (SIS): Instrumented system used to implement one or more safety
instrumented functions (SIF). An SIS is composed of any combination of sensors, logic solvers
and final elements to implement one or more SIFs.
Section 4 – General Design Specifications
4.7 Scope of Supply and Responsibility
4.7.1 Add the following new paragraph:
The machinery vendor shall supply and install the probes, transducer, sensors and
accelerometers as specified. All probes, transducers, sensors and accelerometers shall be
completely installed up to skid mounted junction boxes. The junction boxes shall be provided
by machinery vendor. The junction box shall be easily accessible for maintenance.
4.7.3 Add the following new paragraph:
Unless otherwise specified, all machinery protection system (transducer and monitor system)
installed for a single machine train shall be from the same equipment manufacturer.
Section 5 – Conventional Hardware
5.1 Radial Shaft Vibration, Axial Position, Phase Reference, Speed Sensing, and Piston
Rod Drop Transducers.
5.1.1.5 Modify the paragraph as follows:
A piece of clear heat-shrink tubing (not to be shrunk at factory) carrying complete “From/To”
information shall be installed over the coaxial cable before the connector is installed. This label
shall be installed on both ends of the cable. Refer to SES-X05-E01 for example of wire tagging.
5.2 Accelerometer Based Casing Transducers
5.2.1.2.3 Modify the paragraph as follows:
A piece of clear heat-shrink tubing (not to be shrunk at factory) carrying complete “From/To”
information shall be installed over the coaxial cable before the connector is installed. This label
shall be installed on both ends of the cable. Refer to SES-X05-E01 for example of wire tagging.
5.2.1.4 Add the following new paragraph:
All cables from transducers to skid mounted junction boxes shall be supplied by machinery
vendor. The Purchaser shall provide the homerun cables from the skid-mounted junction box to
the monitors. All conductors are to be identified with permanent identification per SES X05-E01.
5.3.2.a Substitute
Cables specifications shall comply with requirements of SES-X05-S01.
5.4 Monitor Systems
5.4.1.1 Add the following new paragraph:
Monitor system shall comply with the immunity test requirements of IEC-61000-4-2,3,4,5 and 6.
5.4.1.3.b Modify the paragraph as follows:
SIS Requirements are specified by SES-X03-S01. When machinery protection system is
executing a SIL rated loop, it shall comply with the requirements of SES X03-G01 and SESX03-S01.
5.4.1.3.h Modify the paragraph as follows:
When specified, a monitor system provided with an internal time clock shall have provisions for
remotely setting the time and date through the digital communication port of 3.4.1.4.e or through
GPS based input. The internal clock time setting or synchronization shall be made with a
maximum latency of 100 msec between the master remote clock and the monitor system
internal clock.
5.4.1.3.i Add the following new paragraph:
The system provided shall be of modular design with plug-in components. Removing or
inserting of any main module while the system is under power shall not disrupt the operation of
other unrelated modules in the system.
5.4.1.3.j Add the following new paragraph:
It is permissible to install the modules to monitor more than one machine train in the same
monitor rack (chassis). In such case, the monitor system shall have the capability of
accommodating multiple phase reference transducer inputs from each of these machine
train/cases. However, if monitor system is initiating a machine trip, each machine train shall
have dedicated modules (including dedicated relay modules). Refer to 5.4.1.3.a.
5.4.1.3.k Add the following new paragraph:
Machinery protection system shall be capable of interfacing to an external host computer for
implementing a machinery management system for the machine train(s) during steady state
and transient operating conditions. This data link shall be independent from digital and buffered
outputs of 5.4.1.4.e. Refer to SES-X04-S04 for details.
5.4.1.3.l Add the following new paragraph:
Where filters (low/high pass) are used, either at the interface or monitor, provisions shall be
made to allow unfiltered vibration to be monitored from a buffered test point.
5.4.1.3.m Add the following new paragraph:
SI engineering units shall be used for machinery protection system.
5.4.1.4.c Add the following new paragraph
BNC connectors at the monitor system via front-panel shall be mandatory. A short circuit of the
buffered output from external devices used on this output shall not affect the machinery
protection system.
5.4.1.4.e Add the following new paragraph:
Machinery protection system communication modules shall be redundant. Communication with
DCS shall be via redundant communication links with appropriate protocols as per SES-X02S01.
5.4.1.5 j. Substitute the requirement as follows:
A mean to identify the first out alarm and first out shutdown shall be provided for each
machinery train.
5.4.1.6. a Modify the paragraph as follows:
When specified, an integral, dedicated display capable of indicating all measured variables,
alarm (alert) and shutdown (danger) set-points, and DC gap voltages (for redial shaft vibration,
axial position, piston rod drop, speed indicating tachometer, and electronic overspeed detection
channels used with non-contact displacement transducers).
5.4.1.6. b Modify the paragraph as follows:
Unless otherwise specified, a non-integral display shall be provided to fulfill the requirements
mentioned in 5.4.1.6.a
When a non-integral display is specified, the signal processing/alarm/integrity components (that
is, blind monitor) shall be provided with following minimum local status indication (positive
illumination, for example, lighted in the annunciated condition) as applicable:
1. Power status
2. System circuit fault,
3. System alarm (alert)
4. System shutdown (danger)
5. System shutdown bypassed.
5.4.1.7.a Modify
The monitor system components shall be capable of meeting accuracy requirements specified
in Table 1 with input voltage to the power supply of 180-264 volts AC rms with a line frequency
of 50-60 hertz. Manual switchable power supply units/equipment shall not be used.
5.4.1.7. Power Supplies
5.4.1.7.i Modify the paragraph as follows:
Delete “When Specified”
Add the following new paragraph:
Machinery Protection System redundant power supply units shall be powered from control
system power distribution panels (PDP). Refer to SES-X01-E01 for details.
Switchover from one power supply to the other shall be done automatically. This switchover
shall not affect the operation or integrity of the machinery protection system.
5.4.1.7. j Add the following new paragraph:
Removing or inserting an individual power supply shall not affect the operation or integrity of the
machinery protection system.
5.4.1.7.k Add the following new paragraph:
Power supply circuit breakers in monitor system cabinet shall be supplied with auxil iary alarm
contacts. These alarm contacts shall be wired to cabinet common alarm.
5.4.1.8. System-Output Relays
5.4.1.8.3. Modify the paragraph as follows
Output relays shall be hermetically sealed electro-mechanical type. The relay control circuit
shall be “fail-safe” (de-energized to shut down or alarm) and should be of the double pole,
double throw type with electrically isolated contacts. All contacts shall be wired to an accessible
and clearly marked terminal blocks for field wiring attachment. All shutdown signals for the
machine train shall be hardwired.
5.4.1.8.9. Add following new paragraph:
When the trip logic is implemented in the machinery protection system, redundant relay module
shall be used.
5.4.1.8.10. Add following new paragraph:
For machinery using redundant relay module, the configuration of the redundant relay module
shall be identical and dual voting logic shall be implemented in logic solver.
5.4.1.8.11. Add the following new paragraph:
The radial shaft vibration, casing vibration, shaft axial position, shaft rotational speed, piston rod
drop, overspeed and critical machinery temperatures (such as bearing metal and motor
winding) alarm and shutdown set points shall be in accordance with the machine train / case
manufacturer, or the existing field data or from plant organization.
5.4.1.8.12. Add the following new paragraph:
The machinery protection system shall provide digital outputs for trip to the plant logic solver
(SIS or other control system). The two options for trip signal are:
a. Machinery protection system provides individual digital trip signal to plant logic solver
and all trip logic is implemented in logic solver.
b. Machinery protection system performs logic operation for each machine and send one
digital trip signal per machine to plant logic solver.
5.4.1.10. c Substitute the requirement as follows:
Alarm storage for storing the time, date, and value for a minimum of 500 alarms. Time stamp
shall be a 100 msec resolution.
5.4.1.11 Location of Monitor Systems
Substitute the requirement as follows:
Unless otherwise specified monitors shall be installed in unclassified environment controlled
buildings. Monitoring system cabinets shall comply with SES-X01-E01.
5.4.1.12 Add the following new paragraph:
The machinery vendor shall submit their recommended alarm and shutdown set points for each
machinery train.
5.4.1.13 Add the following new paragraph:
For a given machine, the racks and the monitors should be arranged as per machine train
layout.
5.4.1.14 Add the following new paragraph:
Each monitor shall have a permanent tag indicating the identification number and description of
the sensor point in relation to the machine. Tags shall be securely mounted and displayed.
5.4.5. Casing Vibration Monitoring
5.4.5.1. Add the following new paragraph:
The transducer and mounting fixture shall have natural frequencies sufficiently high to allow the
following:
a. A piezoelectric transducer with an acceleration output shall have a linear operating
range of 10 kHz, minimum.
b. A piezoelectric transducer with a velocity output shall have a linear operating range of 1
kHz, minimum.
5.4.5.2 Add the following new paragraph:
Dual-path channel monitors for accelerometers shall produce an alarm only from acceleration
and an alarm and shutdown from the velocity.
5.4.8 Electronic Overspeed Detection
5.4.8.1 Add the following new paragraph,
Refer to SES-G06-S02 for additional requirements of electronic overspeed trip system.
5.4.8.5 Add the following new paragraph:
Peak speed shall be maintained in non-volatile memory located in one of the monitor system
modules and not on an external device or computer. The peak speed shall be maintained in the
event of a total loss of power or loss of communication to the monitor system.
5.5 Wiring and Conduits
5.5.1. a. Add the following new paragraph:
Figure 11 and C2, Armored cables shall be routed through perforated cable trays. For details
refer to SES-X05-E02.
5.5.2.3.b Add the following new paragraph:
Max. cable distance between field device and monitor system for each project shall be
confirmed by monitor system vendor.
5.5.2.5 Add the following new paragraph:
The unused conductors in the field cables shall be terminated in the junction box.
5.7 Field Installed Instruments
5.7.1 Add the following new paragraph:
Field installation of transducer system shall comply with SES-E02-E02 for hazardous area
Classification and with SES-E02-G01 Electrical System Design Criteria.
5.7.4. Add the following new paragraph:
Each machinery train shall have a common junction box installed for termination of all the
temperature sensors lead wires. All junction boxes shall be located for ease of access and on
the same side of the machine train as the oscillator-demodulator junction boxes. The boxes
shall be mounted in a vibration free environment. Separate junction box shall be provided for
motor stator RTD’s. Terminal blocks shall be mounted vertically on DIN rail. Junction boxes
installation shall comply with SES-R11-C02.
5.7.5 Add the following new paragraph:
The labeling, listing, or certification of electrical equipment required by the National Electrical
Code (NEC) to be approved for use in hazardous locations shall be based upon at least one of
the following standards or procedures:
a. UL standards
b. FM procedures
c. CSA standards
d. IEC standards
5.7.6. Add the following new paragraph:
Labeling, listing or certification of all equipment shall be by at least one of the following test
laboratories:
5.7.6.1. For conduit seals:
a. USA – Underwriters Laboratories Inc. (UL) – Labeled or listed
b. USA – Factory Mutual Research Corp. (FM) – Certified
c. Canada – Canadian Standards Assn. (CSA) – Certified
5.7.6.2. For equipment other than conduit seals:
a. USA – Underwriters Laboratories Inc. (UL) – Labeled or listed
b. USA – Factory Mutual Research Corp. (FM) – Certified
c. Canada – Canadian Standards Assn. (CSA) – Certified
d. UK – British Approvals Services – Certified
5.7.6.3. For Electrical Equipment in Flammable Atmospheres (BASEEFA)
a. France – Laboratoire Central des –Certified Industries Electriques (LCIE)
b. Germany – Physikalisch Technische –Certified Bundesanstalt (PTB)
6.3 Identification of Transducers and Temperature Sensors.
Add the following new paragraph:
Each instrument shall carry a phenolic tag along with process description as per SES-R11-C01.
7.3 Testing
7.3.2.1.1 Add the following new paragraph:
Machinery protection system vendor shall prepare a Factory Acceptance Test (FAT) procedure
and submit to purchaser for approval.
7.3.2.3 Add the following new paragraph:
Machinery protection system vendor shall conduct a Pre-FAT based on the approved FAT
procedure and shall submit Pre-FAT report to purchaser before start of actual FAT.
7.5. Mechanical Running Test
Modify the paragraph as follows:
Contract vibration probes, cables, oscillator-demodulators and accelloremters shall be used
during factory mechanical running test.
7.6. Field Testing
7.6.2.5 Add the following new paragraph:
Sample probe (one for each type of probe) and reference accelerometer (as per 7.6.2.3) shall
be provided by agency providing/installing vibration probes. These instruments shall be in
addition to the installed instruments and will be used for loop test at site.