SPECIFICATION FOR PLUMMER BLOCKS

Transcription

1 IPSS INTER PLANT STANDARD IN STEEL INDUSTRY SPECIFICATION F PLUMMER BLOCKS IPSS: (First Revision) Cross Reference IS : Formally : IPSS: FEWD 0.1 Interplant standardization in steel industry was initiated under the aegis of the Indian Standards Institution (ISI) and the Steel Authority of India Limited (SAIL). This IPSS was prepared by the standard coittee on Mechanical Drives, IPSS 1:1 and adopted in February Lastly, this has been revised with first revision by the standard coittee in November, 2018 with the active participation of the representatives from major Indian steel plants and leading consultants. 0.2 This standard for steel industry primarily aim at achieving rationalization and unification of parts and sub-assemblies used in steel plant equipment and accessories and provide guidance in intending stores or equipment for existing or new installations by individual steel plants. For exercising effective control on inventories, it is advisable to select a fever number of sizes (or types) from among those mentioned in this standard for the purpose of company standards of individual steel plants. It is not desirable to make deviations in technical requirements. 1. SCOPE 1.1 This Inter Plant Standard specifies the requirement of pluer blocks along with the respective bearing numbers for pluer blocks. 1.2 This standard covers the following two types of pluer blocks : a) Fabricated and b) Cast iron c) Cast Steel 1.3 Only fabricated pluer blocks shall be used E O T Cranes. 2. MATERIAL 2.1 The pluer blocks housing shall be made of Cast iron conforming to at least grade FG of IS 210: 1993 (Fifth Revision) Cast Steel conforming to IS 1030: 1998 (Fifth Revision) Page 1 of 5

2 Spheriodal graphite cast iron conforming to Grade SG 400/15 of IS 1865: 1991 (Third Revision) Grade Fe410-S of IS: Hot Rolled Medium and High Tensile Structural steel (Standard quality) (Seventh Revision). 2.2 The bolts used to connect top and bottom halves of the pluer block shall be made of steel conforming to Property Class- 8.8, IS: The hexagonal nuts shall conform to property class 8, IS: Technical Supply Conditions for Threaded Steel Fasteners, preferred series of IS: 1364 (Part 4)-2002 Hexagonal head bolts, screws and nuts of product grades A and B : Part 4 : Hexagon thin nuts (chamfered) (size range M 1.6 to M 36) The Stud to be used for Cast Iron Pluer Block conforming to property class 6.6, IS : & Nut property class Oil seal shall be used to prevent leakage of grease. 2.4 Each pluer block shall be provided with one grease nipple and one drain out plug, Lifting lug. 2.5 Locating Dowel pins to be provided between top & bottom halves. 3. DIMENSIONS 3.1 The overall dimensions of the fabricated pluer block shall be as given in Table 1 and those of cast iron pluer blocks shall be as given in Table The detailed dimensions of the fabricated pluer blocks shall be as per respective drawings. The corresponding bearing number for each pluer block shall be as per Table 1 and DESIGNATION 4.1 A pluer block for a shaft diameter of fabricated shall be designated as : PB F In case it is made of cast iron, the designation shall be as : In Case it is made of Cast Steel : PB C PB CS 5. WKMANSHIP AND FINISH Page 2 of 5

3 The pluer block shall be well finished, free from burrs, sharp edges and any other defect which may cause injury while handling. 6. MARKING The pluer block shall be marked with the following at any suitable location : a) Manufacturer s name or trade-mark, and b) Designation. 7. Technical Information 7.1 Every pluer block shall be accompanied with the following information. a) Inspection Certificate. Page 3 of 5

4 TABLE 1 : DIMENSION OF FABRICATED PLUMMER BLOCK (Clause 3.1 and 3.2.1) Shaft Dia. d A B E H H1 L Bolt Size V Bearing No. Mass in Kg S$ M CK M CK M CK M CK M CK M CK CK CK CK M CK M CK Page 4 of 5

5 TABLE 2: DIMENSIONS OF CAST PLUMMER BLOCK (Clause 3.1 and 3.2.1) All dimensions are in millimeters Page 5 of 5