Draft Indian Standard SYN GAS/ AMMONIA TURBO COMPRESSOR LUBRICATING OILS SPECIFICATION

Transcription

1 Comments Only BUREAU OF INDIAN STANDARDS Draft Indian Standard Doc:PCD 3(2537)C September 2012 SYN GAS/ AMMONIA TURBO COMPRESSOR LUBRICATING OILS SPECIFICATION Not to be reproduced without the permission of BIS or used as STANDARD FOREWORD (Formal clauses shall be added later) Last date for receipt of comments: Keeping in view the limited compatibility of ammonia with mineral oils, there is a tendency of sludge formation under certain operating conditions in Turbo-Compressors. Hence a need is felt to frame a specification to address this issue by incorporating modified thermo-oxidation stability test in the presence of ammonia to ascertain suitability of mineral oil based lubricant for ammonia turbocompressor application mainly in fertilizer / chemical plants. 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 values in the standard 1 SCOPE This draft Indian Standard prescribes the requirements and methods of sampling and test for lubricating oils intended for use as lubricants for Syngas and Ammonia Turbo compressor 2 REFERENCES The following standards contain provisions which through reference in this text, constitute provision of the standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: IS No. IS 1447 (Part 3):1992 Title Petroleum and its products Methods of sampling Part 3 Method of sampling of semi-solid and solid petroleum products (first revision) IS 1448 : Part 1/Section1 : 2002 IS 1448 (Part 2) :2007/ ISO 6619:1988 Methods of test for petroleum and its products Part 1/Section1 Determination of acid number of petroleum products by Potentiometric Titration (Second revision) Methods of test for petroleum and its products : Part 2 Petroleum products and lubricants Neutralization Number Potentiometric titration method (Second Revision) 1

2 IS 1448 : Part 10 ::1970 IS 1448 : Part 15 : 2004 IS 1448 : Part 16 : (Part 25) : (Part 56) : (Part 67): (Part 69) : (Part 91) : (Part 96) : (Part 102) :1981 Methods of test for petroleum and its products Part 10: Cloud point and pour point (first revision) Methods of Test for Petroleum and Its Products Part 15: Petroleum Products Corrosiveness to Copper Copper Strip Test (third revision) Methods of test for petroleum and its products: Part 16 Density, Relative Density or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method (third revision) Methods of Test for Petroleum and its Products Part 25 Determination of kinematic and dynamic viscosity (first revision) Methods of Test for Petroleum and its Products Part 56 Viscosity Index by Calculation (Second Revision) Foaming characteristics of lubricating oils Methods of test for petroleum and its products: Part 69 Flash and fire point by Cleveland (open) cup Methods of test for petroleum and its products: Part 91 Emulsion characteristics of petroleum oils and synthetic fluids Methods of Test for Petroleum and its Products - Part 96 : Rust-preventing Characteristics of Steam-turbine Oil in the Presence of Water Methods of test for petroleum and its products: Part 102 Determination of air release value 1448 (Part 106) Methods of test for petroleum and its products: Part 106 Determination of :1981 oxidation characteristics of inhibited steam-turbine oils 9466:1980 Viscosity classification of industrial liquid lubricants 3 GRADES AND PERFORMANCE TYPES 3.1 Grades The lubricating oil shall be of the following two grades as defined in IS a) VG 32 b) VG Lubricating oils of other intermediate viscosities may also be blended as agreed to between the purchaser and the supplier. 3.2 Performance Types 2

3 It is intended to be used in Syn gas and Ammonia centrifugal compressor lubricating system where the machinery does not require lubricants with enhanced load carrying capacity. 4 REQUIREMENTS 4.1 Description The oil shall be blended from suitably refined high quality Grade II / Grade III base stocks and additives such as rust and oxidation inhibitors and selected additives as required to control foam, demulsibility, sludge etc, to meet the requirements of this standard. The use of viscosity improvers and Zinc based additives are not permitted The finished oil shall be clear and free from water, suspended matter, dirt, sediment and other extraneous impurities The lubricating oils shall comply with the requirements given in Table 1, when tested according to the methods prescribed in column 5 of Table Homogeneity The additives used shall be wholly soluble in the oil and shall be uniformly distributed throughout at all temperatures above the specified pour point upto 120ºC. When cooled to 6ºC below its pour point for 4 h, the oil shall regain homogeneity and shall show no evidence of separation or stratification when brought to the ambient temperature in an undisturbed condition. 4.3 The properties of the oil shall not be affected by water washing determined by testing the rust preventive characteristics [see Sl. No.(viii) of Table 1]. 4.4 Compatibility Oils supplied against this standard shall be compatible with any other oil fully meeting the requirements of this standard. Oils shall be considered to be compatible, if a mixture of equal volumes of unused oils complies fully with the requirements of this standard. 4.5 Specific Requirements In addition to the requirements of Table 1, `Super clean oils should also meet additional cleanliness test requirement of class 8 Max as per NAS These limits apply only at the time of delivery. The cleanliness limits are meant to be only representative of good workmanship in manufacture and as general practice the oil must be filtered prior to its charging in the lubrication system according to equipment manufacturer s recommendations. 4.6 Optional Requirements The material shall also meet the requirements of the hydrogen solubility test. The test values and the method shall be as agreed to between the purchaser and the supplier. 5 PACKING AND MARKING 3

4 5.1 Packing The material shall be packed in metal container or in other suitable containers as agreed to between the purchaser and the supplier. 5.2 Marking The containers shall be securely closed and marked with the following: a) Indication of the source of manufacture; b) Name, type and grade of the material; c) Net mass of the material; d) Date of manufacture; e) Recognized trade-mark, if any; and f) Identification in code or otherwise to enable the lot of consignment or manufacture to be traced back. 5.3 BIS Certification Marking The container may also be marked with the BIS Standard Mark The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made there under. The details of conditions under which the license for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. 6 SAMPLING 6.1 Representative sample of the material shall be drawn as prescribed in IS 1447 (Part 3) 6.2 Number of Tests Tests for kinematic viscosity and viscosity index shall be conducted on each of the individual samples while the remaining tests shall be made on the composite sample. 6.3 Criteria for Conformity The lot shall be declared as conforming to the requirements for kinematic viscosity if the expression X R lies within the range specified in Table The lot shall be declared as conforming to the requirements for viscosity index if the expression X R is greater than or equal to the minimum limit specified in Table 1. 4

5 6.3.3 In respect of each characteristic tested on the composite sample, the lot shall be declared to meet the specification requirements if all test results on the composite sample meet the corresponding requirement given in the specification. NOTE- In a single consignment, all containing material of the same grade and belonging to the same batch or manufacture shall be grouped together to constitute a lot. Table 1 Requirements for Syngas andammonia Centrifugal Compressor Lubricating Oils (Clauses and 4.5) Sl No. Characteristics Requirement for Grades Method of Test Ref to VG 32 VG 46 IS1448 ASTM (1) (2) (3) (4) (5) (6) i) Kinematic viscosity at P:25 40ºC, mm 2 /s Min Max ii) Viscosity index, Min P:56 iii) Total acid number (TAN), mg KOH/g Max P:1 iv) Inorganic acidity mg Nil Nil P:2 KOH/g v) Flash point, Cleveland P:69 Open Cup ºC, Min vi) Pour point, ºC, Max P:10 vii) Corrosiveness to copper at Not worse than No.1 P:15 100ºC for 3 h, Max viii) Rust preventing Shall pass the test P :96 characteristics 24 h test ix) Emulsion characteristics, Max x) Foaming characteristics, Max a) Seq I 24ºC ml 300/nil b) Seq II 93.5ºC, ml 25/nil c) Seq III 24ºC,ml 300/nil xi) Oxidation stability 1) Time to reach 2.0 TAN, Min, in h (20) Procedure B P :91 P: P:106 xii) Air release value at 50ºC 4 4 P:102 xiii) Cleanliness, gravimetric P: 2) (0.8µ filter porosity), Mg/100ml, Max xiv) xv) xvi) Density at 15ºC, g/ml, Max RPVOT at 150 C, Minute, Min TOST,- Ammonia Compatibility after 150Hrs test P:16 D943Mod 3) 5

6 a) TAN, mgkoh/gm, max b)heptanes insoluble, %m/m c) Copper content, ppm max max Note : 1) This is a type test for which manufacturers/suppliers shall give the guarantee for its compliance. 2 ) Under preparation. Till such time the Indian Standard is published, the method ASTM D 4898 shall be used. 3) test condition : a) Mixture of air ( 8.6 l/h) and Ammonia gas (1.4 l/h) b) Only Copper catalyst c) Only 1ml distilled water in 300ml oil. Additional 1ml water is added every 24Hrs. d) temperature : 125 Deg C e) Duration : 150 Hrs 6