API 670 Machinery Protection System

API 670

 Machinery Protection Systems (2000 edition)

1. Scope:

This standard covers the minimum requirements for a machinery protection system measuring radial shaft vibration, casing vibration, shaft axial position, shaft rotational speed, piston rod drop, phase reference, overspeed, and critical machinery temperatures (such as bearing metal and motor windings). It covers requirements for hardware (transducer and monitor systems), installation, documentation, and testing.

The machinery protection system vendor may offer alternative designs. Equivalent metric dimensions and fasteners may be substituted as mutually agreed upon by the purchaser and the vendor.

In case of conflict between this standard and the inquiry or order, the information included in the order shall govern.

The editions of the following standards, codes, and specifications that are in effect at the time of publication of this standard shall, to the extent specified herein, form a part of this standard. The applicability of changes in standards, code, and specifications that occur after the inquiry shall be mutually agreed upon by the purchaser and the machinery protection system vendor.

API

      RP 552          Signal Transmission Systems

      RP 554          Process Instrumentation and Control, Section 3, Alarm and Protective Devices

      Std 610          Centrifugal Pumps for Petroleum, Heavy Duty Chemical and Gas Industry Servcices

      Std 612          Special-Purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services

ANSI

        MC96.1        Temperature Measurement Thermocouples

ASME

        Y14.2M       Line Conventions and lettering

        PTC 20.2     Overspeed Trip Systems for Steam Turbine-Generator Units

CENELEC

        EN50082-2  Electromagnetic Compatibility Generic Immunity Standard. Part 2: Industrial Environment

DIN

EN50022      Low voltage switchgear and controlgear for industrial use; mounting rails, top hat rails, 35 mm wide for snap-on mounting of equipment.

IEC

      584-1             Thermocouples, Part I: Reference Tables

IPCEA

       S-61-402       Thermoplastic-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy

ISA

       S12.1              Definitions and Information Pertaining to Electrical Instruments in Hazrdous (Classified) Locations

       S12.4              Instrument Purging for Reduction of Hazardous Area Classification

       S84.01            Application of Safety Instrumented Systems for the Process Industries

Military Specifications

        MIL-C-39012-C

                              Connectors, Coaxial, Radio Frequency, General Specification for

        MIL-C-39012/5F

                              Connectors, Plug, Electrical, Coaxial, Radio Frequency, [Series N (Cable) Right Angle, Pin Contact, Class 2]                 

        MIL-STD-883B

                              Tests, Methods, and Procedures for Micro-Electronics    

NFPA

        70                   National Electrical Code

        496                 Purged and Pressurized Enclosures for Electrical Equipment

OSHA

        Form 20          Material Safety Data Sheet

Schneider Electric

        PI-MBUS-300 Modbus® Protocol Reference Guide

The standards, codes, and specifications of the American Iron and Steel Institute (AISI) also form part of this standard.

The purchaser and the machinery protection system vendor shall mutually determine the measures that must be taken to comply with any governmental codes, regulations, ordinances, or rules that are applicable to the equipment.

• Contents:

Section 1 – General
1.1 Scope
1.2 Alternative designs
1.3 Conflicting requirements
Section 2 – References
Section 3 – Definitions
Section 4 – General design specifications
4.1 Component temperature Ranges
4.2 Humidity
4.3 Shock
4.4 Chemical Resistance
4.5 Accuracy
4.6 Interchangeability
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
5.3 Temperature Sensors
5.4 Monitor systems
5.5 Wiring and conduits
5.6 Grounding
5.7 Field-installed instruments
Section 6 – Transducer and sensor arrangements
6.1 Location and orientation
6.2 Mounting
6.3 Identification of transducers and temperature sensors
Section 7 – Inspection, testing, and preparation for shipment
7.1 General
7.2 Inspection
7.3 Testing
7.4 Preparation for shipment
7.5 Mechanical running test
7.6 Field testing
Section 8 – Vendor’s data
8.1 General
8.2 Proposals
8.3 Contract data
Appendix A Machinery protection system data sheets
Appendix B Typical responsibility matrix worksheet
Appendix C Accelerometer application considerations
Appendix D Signal cable
Appendix E Gearbox casing vibration considerations
Appendix F Field testing and documentation requirements
Appendix G Contract drawing and data requirements
Appendix H Typical system arrangement plans
Appendix I Setpoint multiplier considerations
Appendix J Electronic overspeed detection system considerations
Figures 1 to J-4
Tables 1 to J-3

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