BYGGING Hydraulic Jacking System For __ Steel Tank Erection In-Collaboration with BYGGING UDDEMAN AB, SwedenSteel Tank Erection according to the BYGGING method The BYGGING-UDDEMANN method was introduced at the end of the 1950's to rational- ize the erection of steel tanks for various storage purposes. The method is used for tanks of various designs and of all sizes, The erection and welding work is carried out entirely on the ground, This gives a high degree of safety and precision in the workmanship and facilitates the inspections required All work takes place under adequate protection and safety for the workmen. Most of the welding work is carried out inside the tank, independently of the weather conditions. The method reduces construction time. The tank construction method, like BYGGING- UDDEMANN’S other system, has been in use all over the world for many years. BYGGING INDIA LTD. introduced this system in India in 1987 in technical collaboration with BYGGING-UDDEMANN AB, Sweden. We have supplied equipment to many tank erection contractors in India—Kaveri Engineer- ing, Vijay Tanks & Vessels Pvt. Ltd., Artson Engineering Ltd., Techno Electric Engineering Co. Ltd., Shrinivas Plates & Structurals, Consol- idated Engineering Construction Co., Bridge & Roof Co. (I) Ltd. (on both sale and hire basis Reputed consultants like Engineers India Ltd. and IOCL Engineering Division have approved of our method of steel tank erection Bygging Steel Tank erection system has been used by these and many other contractors for all types of tank erection works at the following important sites— Indian Petrochemicals Ltd., Nagothane; Reliance Petrochemic- als Ltd., Patalganga; Indian Aluminium Ltd., Belgaum; M4) Refineries Ltd.; Indian Oil Corporation Ltd., Mathura Refinery & Baroda Gas Cracker Unit; Bharat Petroleum Corporation Ltd., Mahul Refinery-Bombay; Hindustan Petroleum Corporation Ltd., Visakh Refinery & Mahul Refinery-Bombay; Herdillia Che- micals Ltd., New Bombay; 5.M. Dyechem Ltd., Daund.The BYGGING method facilitates and simplifies tank erection Principle of assembly: 1. The foundation is made ready. 2. The base plate is laid out and welded. —— 3. The periphery of the tank is marked out on the base plate. 4, Guide trestles for the shell plates are erected, 5. The top shell plates are erected and welded vertically, oe The roof trusses are assembled and joined to the top shell plate. Lifting trestles with hydraulic jacks are fitted internally along the periphery of the tank ry See ew 8. Lifting lugs and guides are welded to the aS shell plate \ | 9. The top shell plate and the roof construction I e are lifted one plate height. ee = 10. The roof plate is fitted and welded in place At the same time, the next shell plate is fit- ted and welded 11. The lifting lugs and guides are removed from the top shell plate and new lugs and guides are welded to the next shell plate. The hydraulic jacks are lowered to the original lifting position, 12. The tank is lifted again to allow the con- tinued erection of shell plates until the full height of the tank has been reached. 13, When the last shell plate is fitted and welded in place, the finished tank is lifted slightly so that the guide trestles can be dismantled 14, The tank is lowered and the shell plates and base plate are welded together 15. The jacking equipment is dismantled. The advantages of the BYGGING method: 1. Welding work takes place at ground level. 2. Welds are easily accessible for inspection. 3. Since the roof construction is fixed to the top shell plate from the beginning, the entire tank is provided with wind-load stability throughout the erection work. 4. The guide trestles stabilize the tank at the bottom and keep it circular. 5. No erection scaffolding is required. 6. Work carried out at ground level provides the greatest safety.The above illustration shows the topmost shell ring erected. The lifting trestles with their nydraulic jacks are placed in position and dis. tributed evenly around the inside of the tank The spacing between the trestles depends on the size and weight of the tank During the next operation, the entire construc tion is lifted one plate height so that the next shell ring can be erected and welded to the previous shell ring. Detail of Hydraulic Jack erected to b on the lifting trestle A slipper with a lifting arm transfers the lifting power over a lifting lug welded to the shell plate. The slipper engages a guide and thus keeps the shell ring in the correct position during the hoisting operation The hydraulic jacks are connected in series by means of high-pressure hoses and are connected to a high-pressure pump from which all jacks are jointly served.Detailed description of complete jacking unit and assembly of lifting trestles A jacking unit as illustrated in the adjacent figure, consists of the following components 1. Upright, Height 3,500 mm. 2. Adjustable stay. 3. Base plate with attachment for upright. 4. Jack rod. @™. Hydraulic jack 6. Slipper ig arm, ting lug (welded to shell plate} 9. Guide (welded to shell plate). 10. Shut-off cock with coupling for high- pressure hose. 11, Shell plate. 12, Stay lug (welded to base plate) The number of jacks required is determined by the size and weight of the tank. o~ Guide trestles These guide trestles fix the shell plate in the exactly correct position and serve as supports during the welding. The guide trestles are spaced at approximately 2 m. The guide trestles can be provided with adjustable brackets for a work platformThe BYGGING method is used all over the world The BYGGING method has been used to con- struct oil tanks, gas tanks and other plate tanks with Hydraulic jacks with capacities varying from 8-25 tons. Complete lifting equipment is manufactured at our factory. Our range of lifting equipment for leasing is adapted to an ever increasing demand, We have equipment which covers requirements for large tanks installations and long rental periods BYGGING lifting units for special purposes Replacing a tank base or foundation repairs The base of an old tank may have to be replaced. In this case, jacking units are erected externally. When the base plate has been cut free from the shell ring, the tank is lifted to a sufficient height and the base plate is replaced. The tank can then be lowered exactly in position again This method is also used to lift tanks in order to repair or reinforce the foundation Tanks which tilt as a result of uneven settling can also be lifted in this manner and straightened. The lifting trestles must be provided with a stable base for all of these operations. Moving steel tanks BYGGING jacks can be used to move tanks horizontally for longer or shorter distances. Increasing the tank capacity The BYGGING method makes it easy to increase the storage capacity of an existing tank. An increase in capacity means that the bottom of the tank must be provided with @ additional shell rings. In some cases, special lifting trestles in which the jacks are placed at the top are used depending on the size and weight of the tank. Lift capacity: 8B—42 tons.The BYGGING method for tanks for liquid gas (Double-walled tanks) Storage tanks for liquid gas consist of two steel shells with insulation between, no a @ i @ The outer tank is first erected together with its roof construction using standard jacking units. The lifting force is adjusted so that the roof construction for the inner tank can be lifted at the same time. IN 7 @ 9 [o} When the outer tank has been constructed, the jacking equipment required is moved to the inner tank which is then constructed in the same manner. An alternative method is to erect the inner tank with the aid of jacks placed on top of the finished outer tank The roof and shell rings of the inner tank are lifted in stages by means of jack rods or steel cables which are fixed to the inner tankBYGGING INDIA LTD. Head Office: 69, RNA Shopping Arcade, Lokhandwala Complex, Andheri (W), Bombay-400 058. Tel.: 6268756. Fax: 6271843 Regd. Office: C-4/63, 1st fl.,Safdarjung Development Area, New Delhi-110 016 Tel.: 666216 Fax: 6864ADVANTAGES OF BYGGING HYDRAULIC JACKING SYSTEM Y Work cartied out at ground level provides the greatest safety, Y Better quality of welding is achieved since the erection and welding work is carried out entirely at ground level. Y Welds ate easily accessible for inspection. ¥ No erection scatfolding is required ¥ Reduces construction time. + akin lifted position WORKING. PRINCIPLE 1. The tank foundations made ready. Base plates are laid out and wielded. 2. The pefiphety of the tank is marked out on the base plates. Guide members for shell plates are erected, 3. The'top shell plates are erected and welded Nerticaly. 4, The foof trusses are“Gssembled and joined to the top shell plate. 5. Lifting trestles with hydraulic jacks are fitted intemally along the peripheryof the tank. The number of jacks required is determined by the size and weight of the fank. Stability caléulations are carried out while determining the number of jacks to be deployed, 6. Lifting lugs and guide lugs (fend-off lugs) are welded fo the shell plates. 7. The hydraulic jacks are connected in series by means of high pressure hoses and are connected to high pressure pump from which all jacks are jointly served. A slipper with a lifting arm transfers the lifting power over a lifting lug welded to the shell plate. 8. The top shell plate and roof construction are lifted one plate height. The slipper engages a guide lug and thus keeps the shell ring in the Correct position during the hoisting operation. 9. The roof plates are fitted and welded in place At the same time, the next shell plates are fitted and welded 10.The iting lugs and guide lugs are removed from the top shell plate and are welded to the next shell plate. The hydraulic jacks are lowered to the original lifting position. 11.The tank is lifted again to allow the continued erection of shell plates until the full height of the tank has been reached. 12.When the last shell plate is fitted and welded in place, the finished tank is lifted slightly so that the vide members can be dismantled 13.The tank is lowered and the shell plates and base plate are welded together. 14.The jacking equipment is dismantled.HYDRAULIC JACKING SYSTEM GLOBALLY ACCEPTED The hydraulic jacking system is the most modern and widely used method for construction of above ground vertical steel storage tanks. Bygging hos supplied hydraulic jacking equipment fo tank construction contractors for erection of tanks in oil refineries, petrochemical plants, fertilser plants, power generating stations, petroleum product installations & depots and at liquid storage terminals at ports Out of more than 2000 tanks built using this method, some of the companies that have used ourjacking system are ® Bridge & Roof Co. (India) Lid @ Shrinivas Plates & Structurals Co. Ltd. Nicco Corporation Lid. (Project Division) @ Punj Lloyd, Lid. @ Sharp Tanks & Situcturais. ¢ Alpha Beta Engg. Construction @ Larsen & Toubro Lid.@ Spic Jel Engineering Construction Lid Bygging Jacking equipment can be used for : @ Construction of new tanks and horton spheres © Dismantling of tanks ® Replacing a tank base or foundation repairs © Moving tanks horizontally © Increasing tank capacity. Byaging offers jacking equipment with single jack liting capacities of 12 ton, 18 ton and 25 fon. Shell Pycrcnic ace wn eh plates of upto 3 mir. wide can be erected. Bygging provides the following services : © Sale or hire of hydraulic jacking equipment © Specialist technicians for installation & operation of the equipment. © Training client's personnel in the use of hydraulic jacking equipment, This method is used for the following types of tanks : = |e Penoien ees Tank farm erected using jacking syst. Ae eerie eared eee err ueundCera aera construction of tall concrete pected eal Beer ec een Net eres ed Re eee eo eee ea) distribution of LPG. Reed eet ack me ay etek sare) BYGGING INDIA LTD. CNW tetore Mineola ire Road Telacun tase Oesemia ie} Tel.: (9122) 633 6452 / 636 0430 / 636 8756 ere oll reareltel-le Na RootCera aera construction of tall concrete pected eal Beer ec een Net eres ed Re eee eo eee ea) distribution of LPG. Reed eet ack me ay etek sare) BYGGING INDIA LTD. CNW tetore Mineola ire Road Telacun tase Oesemia ie} Tel.: (9122) 633 6452 / 636 0430 / 636 8756 ere oll reareltel-le Na Root