7/30/2019 02hndst http://slidepdf.com/reader/full/02hndst 1/12 STEAM TURBINE 500 MW ERECTION INSTRUCTIONS FOR HANDLING & STORAGE SCOPEThe document covers all steam turbine components and provides the handling, inspection and storage instructions for large steam turbine components at site. A strict adherence to these instructions is necessary to avoid damages during handling and storage at site. HANDLING OF EQUIPMENT : In any kind of rigging work it is necessary to strictly observe the safety precautions, since even the slightest negligence and non observance of the rules may result in accidents, which may cause damage to equipment or injury to men. The site for the rigging work involving lifting and conveying of loads should be well lighted. The loads must not be lifted unless the crane operator can see clearly the signals given by the rigger. The positions where the slings are to be put, are marked on the packages and on the drawings. While lifting/handling these packages/equipment, the slings should only be put at the proper places. The slings of the proper sizes and lengths should only be used for handling the equipment/packages. The angle between the two arms of the sling at the crane hook should be small (depending upon the dia of the sling) so as to have proper loading of the sling. The turbine rotors and cylinder covers (in assembled condition are lifted by the use of special lifting devices supplied by BHEL. The use of these lifting devices facilitates correct slinging and maintain horizontal position of the components. These devices, after use, should be properly stored and conserved so as to ensure that they do not get damaged during storage. Before using them, they should be thoroughly inspected. The work related to handling of the loads (packages or equipment) by crane or by other hoisting mechanism should be entrusted to trained riggers only. If the rigger/operator is not sure of the weight of the item/package (load) to be handled, he must ask for the required information before handling the equipment. Bharat Heavy Electricals Limited Rev 00, 7-98 T1-08-0202G Page No. 1 of 11
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
SCOPE
The document covers all steam turbine components and provides the handling,inspection and storage instructions for large steam turbine components at site.
A strict adherence to these instructions is necessary to avoid damages duringhandling and storage at site.
HANDLING OF EQUIPMENT :
In any kind of rigging work it is necessary to strictly observe the safetyprecautions, since even the slightest negligence and non observance of the rules may result in accidents, which may cause damage to equipmentor injury to men.
The site for the rigging work involving lifting and conveying of loads shouldbe well lighted. The loads must not be lifted unless the crane operator can see clearly the signals given by the rigger.
The positions where the slings are to be put, are marked on the packagesand on the drawings. While lifting/handling thesepackages/equipment, the slings should only be put at the proper places.
The slings of the proper sizes and lengths should only be used for handlingthe equipment/packages. The angle between the two arms of the slingat the crane hook should be small (depending upon the dia of the sling)so as to have proper loading of the sling.
The turbine rotors and cylinder covers (in assembled condition are lifted bythe use of special lifting devices supplied by BHEL. The use of these lifting devices facilitates correct slinging and maintainhorizontal position of the components. These devices, after use, shouldbe properly stored and conserved so as to ensure that they do not getdamaged during storage. Before using them, they should be thoroughly
inspected.
The work related to handling of the loads (packages or equipment) by crane or by other hoisting mechanism should be entrusted to trained riggersonly. If the rigger/operator is not sure of the weight of theitem/package (load) to be handled, he must ask for the requiredinformation before handling the equipment.
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
The rigger and the crane operator should see that the hook and the ropes of the crane occupy vertical position, before hoisting the load. Draggingof the load by slanting ropes is not allowed. The center of gravity of theload should be aligned with the vertical axis of the crane hook.
The eye bolts, 'D' shackles, turn buckles, and wire ropes of suitable sizesshould only be used for handling of the equipment. Before using, theyshould be thoroughly inspected to their full threads, so as to avoid anychance of slipping then the load comes on them.
Before giving a signal to lift the load, the rigger must check and ensure thatthere are no loose parts or tools on the load, which might fall duringlifting. Then the load must be lifted 100 or 200 mm high for checkingthe uniformity of sling tensioning and reliability of lashing. If it isnecessary to rearrange the sling lengths, the load must be loweredand then the slings rearranged.
Before horizontal conveyance of the load the rigger must see that the load hasbeen lifted to a height at least 0.5 M above the tallest object, on the pathof the load. While the load is being conveyed, the rigger mustaccompany it and see that it is not moved above any person. Prior tolowering the load the rigger should examine the ground on which theload will be, lowered and make sure that these is no risk of falling or slipping of the load.
If any one of the personnel present during lifting or lowering of the loaddetects some defect of the crane or sling of notices some conditions
jeopardizing the lifting or lowering operation, he must give a signalfor emergency grounding of the package or components.
Smooth lifting and transportation of equipment must be ensured. Shocks and jerks should be avoided.
All lifting devices, slings must be properly conserved after use and periodicallyinspected and tested.
In the turbines having diaphragms, it is prohibited to handle diaphragms byputting slings in between the blades. For handling the weldeddiaphragms, special lifting devices is supplied by BHEL and thecast diaphragms are handled by putting the eye bolts, for which theprovision of threads holes have been made in the diaphragms.
While handling the bearings, it is prohibited to put the sling across the rabbitsurface of the bearings. Threaded holes have been provided; in which theeye bolts have to be put for handling of the bearings.
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
While handling the cylinders, it must be ensured that the slings or any other material does not get rubbed at their horizontal and vertical partingplanes or at any other machined surface.
The handling of the long components such as longitudinal girder, endwall etc.should be done with extra care. When they are placed on the floor, inaddition to the end supports, few extra supports at the intermediatepositions must be provided.
While handling LP rotor with free standing blades, care must be taken to ensurethat no force is exerted on the free standing blades to avoid collapsing of clamping pieces under blade root.
MARKINGS ON PACKING CASES
Various symbols are marked on the packing cases as per 0456.001 tofacilitate storage and handling of the crates and protection of equipment inside.
INSPECTION
Before storing the equipment it should be opened for visual examination or the internal packing, protective coating and condition of the equipment.
Any damage to packing and conservation should be immediatelyrectified.
It is necessary to carryout first inspection within three weeks of arrival of theconsignment. Thereafter, all the equipment should be inspected once inevery three months to insure that the conservation is intact. During rainyseason, the inspection should be done once in a month. At any time, if any original conservation is found damaged, it should be reconserved asper relevant conservation instructions No. ST 33004.
While inspecting the packages containing rotors, special care should be takento check the journals. In case of slightest sign of pitting on the journalsand thrust collar, immediate steps for rectification should be taken andequipment reconserved as per relevant conservation instructions.
STORAGE
All steam turbine equipment should be accommodated in the designated placeof storage immediately after arrival at destination. This is very essentialparticularly during the rainy season.
Bharat Heavy Electricals LimitedRev 00, 7-98 T1-08-0202GPage No. 3 of 11
- Roofed area with walls (of brick /asbestos/ GI sheet ) around and
cemented / pucca hard floor.
'R' - - Raised platform with shed of asbestos /GI sheet / water proof tarapaulin.
'S' - - Raised Platform.
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
The platforms and store-houses should be built up in conformity with the fireprevention rules and standards. Complete storage area especially the ‘R’& ‘S’ catagory must be adequately fenced & protected against theft &pilferage.
These store houses and areas around them should have proper drainagefacility for the sub-soil, surface and rain water. The water should not beallowed to stand or get accumulated in these areas, especially wherethe material has been stored.
Store house should be provided with proper ventilation facilities.
Level should be maintained for all the packages and equipment and shouldbe uniformly supported to avoid distortion. The long packages shouldbe supported at intermediate places also, so as to avoid sagging duringstorage.
Store houses should preferably be equipped with proper lifting devices toensure normal handling of equipment.
Small and medium size parts can be kept on shelves with proper identificationtags.
Packages upto 5 tones can be placed on upon the other upto 2.5m in heightusing required number of wooden spacers 50 mm thick. In doing so,lighter packages would be laid upon heavier once to avoid any damageto lower packages.
Articles weighing more than 5 tones should be laid in a single tier.
For heavier components under ‘Q’, the roof/walls may be constructed/fabricatedafter placement of the component on cemented/pucca hard floor.
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
STORAGE OF STEAM TURBINE COMPONENTS
SNO. DESCRIPTION OF THE COMPONENT TYPE OFSTORAGE
1. FOUNDATION BOLT Q
2. EMBEDDED PARTS (ADDITIONAL) R
3. COMPONENTS OF BASE PLATE ASSLY. Q
4. BASE PLATE LP CASING R
5. LP OUTER CASIONG R
6. LONGITUDINAL GIRDER (LEFT & RIGHT) R
7. LP FRONT WALL (TS&GS) R
8. LP SHAFT SEALING (FRONT & REAR) Q
9. AUXILIARIES OF TURBINE Q
10. HP/IP BEARING PEDESTAL Q
11. HP/IP BEARING PEDESTAL ASSEMBLY PARTS Q
12. IP/LP PEDESTAL ASSEMBLY Q
13. LP/GEN. PEDESTAL Q
14. BEARING PEDESTAL PARTS Q
15. FRONT BEARING PEDESTAL Q
16. LIFTING BEAM R
17. LP CASING EXTRACTION A1 R
18. LP EXTRACTION A2 R
19. LP EXTRACTION A3 R
20. LP EXTRACTION PIPE SHEATHING R
21. INNER GUIDE PLATE DIFFUSER R
22. DIFFUSER (UPPER & LOWER HALVES) R
23. LP INNER-OUTER CASING (VH) Q
24. LP INNER CASING ASSEMBLY (LH & VH) Q
25. HEATING DEVICE Q
26. LP CASING ASSEMBLY Q
27. LP INNER CASING ASSEMBLY (FASTENER) Q
28. INNER GUIDE PLATE DIFFUSER (GS) R
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STEAM TURBINE500 MWERECTION
INSTRUCTIONS FOR HANDLING &STORAGE
29. LP ROTOR Q
30. IP TURBINE Q
31. IP TURBINE PARTS Q
32. IP INLET PIPES Q
33. HP TURBINE Q
34. HP INLET ASSEMBLY Q
35. HP EXHAUST ELBOW Q
36. HPT RELATED PARTS Q
37. FRAME FOR SUSPENSION (ESV) R
38. SUSPENSION OF VALVE (ESV) Q39. ESV & CV CASING WITH VALVE Q
