Vibration Monitors

IPE Engineering Practice IPE-EP-12-1-24

Document number: IPE-EP-12-1-24 · Section: 12 — Instruments and Controls

SCOPE

Vibration monitoring systems shall be supplied in strict accordance with the attached Data Sheets, this Practice, and the referenced standards and publications.
Where special features or improvements over the Practice are required as determined by the Owner, or Owner’s Engineer, these shall be specified on the Instrument Data Sheets and shall be adhered to by the Vendor.
Any deviation from this Practice must be approved by the procedure described in EP 1–1–3.

2.0 REFERENCES

The following codes and standards shall be considered as part of this Practice. All documents shall be the latest editions in force on the date of issuance of this Practice.

STANDARDS AND PUBLICATIONS

IPE Engineering Practices
EP 1–1–3 Deviations to IPE Engineering Practices EP 12–1–1 Control Systems EP 12–1–2 Supplemental Requirements for Control Systems
API
Std 670 Vibration, Axial–Position, and Bearing–Temperature Monitoring Systems
ASME Standard
B1.20.1 Pipe Threads, General Purpose (Inch)
NFPA Standard
70 National Electrical Code

DEFINITIONS

Contractor - Company or business that agrees to furnish materials or perform specified services at a specified price and/or rate to the Owner.
Inspector - A Inflection Point Engineering, LLC appointed engineer or inspector.
Manufacturer - The recipient of a direct or indirect purchase order for materials and/or equipment. In this context, a direct order is one issued to a manufacturer by a contractor or the Owner. An indirect order is one issued to a manufacturer by a vendor (recipient of a direct order) for materials, fabricated components, or subassemblies.
Owner - Inflection Point Engineering, LLC.
Owner’s Engineer - A Inflection Point Engineering, LLC appointed engineer.
Purchaser - The party placing a direct purchase order. The purchaser is the Owner’s designated representative.

DESIGN AND MATERIALS

The Vendor shall furnish a complete machinery vibration and axial position monitoring system for flush panel mounting in the central control room or local panel. The system shall include the monitor rack, power supply and monitors. The non–contacting probes and oscillator– demodulators (proximitors) may be supplied by others.
The system shall be in strict accordance with API 670 except for the following deviations and clarifications:
Para. 3.5.1: Power supply shall be 120 V + 10%–15%, 60”2 Hz AC.
Para. 3.5.5: Vibration danger relay output shall be separate from the axial position shutdown (danger) relay output. Five relay outputs shall be provided; two anticipatory (alert), one axial position shutdown, one vibration shutdown and one circuit fault relay.
Para. 3.5.6: The output relays shall be factory set to de–energize to alarm and de–energize to shutdown.
Para. 3.6.2: First out indication shall be supplied in the monitoring system.
Para. 3.7.6 and 3.8.4: External means for disarming shutdown shall NOT be furnished.
Para. 3.8.4: The shutdown system shall require that both transducer signals reach set point to initiate shutdown.
Para. 3.11: The grounding of the shields shall be at the monitors only. This confirms recent practice of isolating the oscillator/demodulators and grounding signal common at the monitor.
The position of the monitors within the rack will be in accordance with the Instrument Data Sheet.
The monitors shall be suitable for working with probes and oscillator–demodulators (proximitors) mounted in a national Electrical Code (NEC) NFPA 70, Class 1, Group B, C or D, Division 2 area.
Design and materials not specified herein shall be in accordance with the manufacturer’s standard.
Vendor shall provide information on the system’s capability to interface with Distributed Control Systems (DCS).

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