DOCUMENT DESPATCH ADVICE Ref: ME 28/T-17, 23, 39, 40, 3,7,16, 31 Date: DRAFTS IN WIDE CIRCULATION

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1 Phone/fax DRAFTS IN WIDE CIRCULATION DOCUMENT DESPATCH ADVICE Ref: ME 28/T-17, 23, 39, 40, 3,7,16, 31 Date: To: MECHNICAL VIBRATION AND SHOCK SECTIONAL COMMITTEE, MED 28 Dear Sir(s), a) The interested members of Mechanical Engineering Division Council, b) All members of Mechanical vibration and Shock Sectional Committee, c) All others interested Please find enclosed the following documents Doc. No. TITLE Doc: ME 28(1295) Mechanical vibration-evaluation of machine vibration by measurements on rotating shafts- Part 2: Landbased steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 r/min, 188 r/min, 3000 r/min and 3600 r/min. (Adoption of ISO :2009) (ICS ; ; ) Doc: ME 28(1296) Mechanical vibration-evaluation of machine vibration by measurements on non- rotating Part 2: Landbased steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min. (Adoption of ISO :2009) (ICS ; ; ) Doc: ME 28(1297) Mechanical vibration-evaluation of machine vibration by measurements on non- rotating parts-part 3: Industrial machines with nominal power above 15 kw and nominal speeds between 120 r/min and r/min when measures in situ (Adoption of ISO :2009) (ICS ; ) Doc: ME 28(1298) Mechanical vibration-evaluation of machine vibration by measurements on non- rotating parts-part 4: Gas turbine sets with fluid-film bearings. (Adoption of ISO :2009) (ICS ; ) Doc: ME 28(1299) Mechanical vibration-rotor balancing Part 14: Procedures for assessing balance errors. (Adoption of ISO :2012) (ICS ) Doc: ME 28(1300) Mechanical vibration-rotor balancing Part 21: Description and evaluation of balancing machines (Adoption of ISO :2012) (ICS ) Doc: ME 28(1301) Mechanical vibration-rotor balancing Part 23: Enclosures and other protective measures for the measuring station of balancing machines. (Adoption of ISO :2012) (ICS ) Doc: ME 28(1302) Mechanical vibration-rotor balancing Part 32: Shaft and fitment key convention (Adoption of ISO :2012) (ICS ) Kindly examine the draft Indian standards and forward your views stating any difficulties which you are likely to experience in your business or profession, if these are finally adopted as standards. Last date for receipt of comments: Comments, if any, may please be made in the format as given overleaf and mailed to the undersigned at the above address. In case no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above document as finalized. However, in case of comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional committee for further necessary action if so desired by the Chairman, Sectional Committee. The document is also hosted on BIS website Encl: As above Thanking you, Yours faithfully (T.V. Singh) Scientist F & Head (Mech Engg)

2 ANNEX FORMAT FOR SENDING COMMENTS ON BIS DOCUMENTS (Please use A4 size sheet of paper only and type within fields indicated. Comments on each clauses/sub-clauses/table/fig. etc be started on a fresh box. Information in Column 4 should include reasons for the comments and suggestions for modified wording of the clauses when the existing text is found not acceptable. Adherence to this format facilitates Secretariat s work) Doc. No.: TITLE: LAST DATE OF COMMENTS: NAME OF THE COMMENTATOR/ORGANIZATION: Sl. No. Clause/Subclause/ para/table/fig. No. commented Commentator/ Organization/ Abbreviation Type of Comments (General/Editorial/ Technical) Justification Proposed change

3 For Comments Only Draft Indian Standard Mechanical vibration-evaluation of machine vibration by measurements on non- rotating parts-part 3: Industrial machines with nominal power above 15 kw and nominal speeds between 120 r/min and r/min when measures in situ ICS ; Not to be reproduced without the permission of Last date for receipt of BIS or used as a STANDARD comments is: 31 March 2014 NATIONAL FOREWORD (Adoption clause to be added later on). ISO is the basic document describing the general requirement for evaluating the vibration of various machine types when the vibration measurements are made on non rotating parts. This part of ISO provides specific guidance for assessing the severity of the vibration measured on bearing, bearing pedestals or the housing of industrial machines when the measurements are made on situ. Two criteria are provided for assessing the machine vibration. One criterion considers the magnitude of the observed vibration; the second consider the changes in the magnitude. It must be recognized, however that, these criteria does not form the only basis for judging the severity of vibration. For some machine types, it is also common to judge the vibration based on the measurements taken on the rotating shafts. Shaft vibration measurements requirements and criteria are addressed in separate documents, namely IS 14773(Pt 1):2000/ISO :1996 Mechanical vibration of non-reciprocating machines -Measurements on rotating shafts and evaluation Part 1 General guidelines and IS/ISO :2009 Mechanical vibration- Evaluation of machine vibration by measurements on rotation shafts part 3- Coupled industrial machines. The Indian Standard supersedes IS 14817(Part 3): 2004/ISO : 1998 Mechanical vibration Evaluation of machine vibration by measurements on non-rotating Parts Part 3 - Industrial machines with nominal power above 15 kw and Nominal speed between 120 r/min and r/min when measured in situ. Under the general title Mechanical vibration-evaluation of machine vibration by measurements on non-rotating parts, the standard is in seven parts, other parts are following:

4 1) Part 1: General guidance 2) Part 2: Land-based steam turbines and generators in excess of 50 MW with the normal operating speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min. 3) Part 4: Gas turbine sets with fluid film bearings 4) Part 5: Machine sets in hydraulic power generating and pumping plants 5) Parts 6: Reciprocating machines with the power rating above 100 kw. 6) Part 7: Rotodynamic pumps for industrial applications, including measurements on rotating shafts. In the adopted standard certain terminology and conventions are not identical with those used in Indian Standards; attention is drawn specially to the following: a) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker. b) Wherever the words International Standard appear, referring to this standard, they should be read as Indian Standard. In the adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their places are listed below along with their degree of equivalence for the edition indicated:

5 International Standard Corresponding Indian Standard Degree of Equivalence ISO 2954:2012 Mechanical vibration of rotating and reciprocating machinery -- Requirements for instruments for measuring vibration severity ISO :1995 Mechanical vibration - Evaluation of machine vibration by measurements on non rotating parts: Part 1 General guidelines IS/ISO 2954:2012 Mechanical vibration of rotating and reciprocating machinery -- Requirements for instruments for measuring vibration severity (Under Development) IS 14817(Pt 1):2000 Mechanical vibration - Evaluation of machine vibration by measurements on non rotating parts: Part 1 General guidelines Identical Identical The concerned technical committee will review the provisions of the following International Standards referred in this adopted standard and to decide that these are acceptable for use in conjunction with this standard: International Standard ISO 496: 1973 Title Driving and driven machines -- Shaft heights For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis shall be rounded off in accordance with IS 2:1960 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. FOR COMPLETE TEXT PLEASE REFERE TO ISO :2009. IF ANY ONE REQUIRES A HARD COPY OF THE SAME PLEASE CONTACT THE UNDER SIGNED. KHUSHBOO KUMARI Sc 'B', MED, ROOM NO: 200 MANAK BHAVAN 9 BHADURSHAH ZAFAR MARG NEW DELHI TELEFAX med@bis.org.in

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