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Installation Instruction of T-Type Ductile Iron Pipes
Goodmax Group sell and export ISO2531,BSEN545 ductile iron pipe and fittings,SSAW pipe,ERW pipes,portland cement 42.5N,special vehicles,cement equipment.
1. Unloading
1.1 Way of Unloading
♦ Way of lifting pipes by crane (See Fig.No.1)
Note: Pipes shall be kept horizontal when lifting and shall be lifted and released gently.
♦ Way of unloading pipes from truck (See Fig.No.2) Steel rope shall be formed tight rings around pipe barrel.
a. Wood block.
b. Pipes shall be unloaded gently with steel rope of 16 mm.
c. Wood block of 170 mm in thickness or wood log of 70.
d. Straw bag shall be placed to protect against shock.
♦ Handling by fork lift (See Fig.No.3)
1.2 Cautions of Unloading
♦ Crane shall be located properly, steel rope and hook shall be checked.
Note: Pipes shall be kept horizontal when lifting.
♦ No persons are allowed to pass by under lifted pipes.
♦ No persons are allowed to stay at the side to which pipes roll down when unloading pipes from truck.
♦ Shims shall be frequently to checked to prevent pipes from moving.
♦ It shall be forbidden to step on pipes with wearing slippery shoes.
♦ Careless lifting shall be forbidden. Lifting equipment and tools shall be decided carefully to use.
♦ When unloading pipes with fork lift, it shall be forbidden to insert fork into pipes.
♦ When lifting and releasing pipes lined with cement mortar, no hooks shall be used.
2. Pipe Line Works
2.1 Temporary piling (See Fig.No.4)
♦ When piling pipes, wood block shall be put under the lowest layer of pipes. Hard material like bricks are not allowed to use.
♦ Adjacent pipes of each layer shall be laid with socket in one side and spigot in the other.
♦ Shims shall be placed.
♦ Height of layers of pipes shall not exceed 2.6 m.
♦ Socket of pipes may be in same side when laying temporarily but shims shall be placed to prevent from moving. (See Fig.No.5)
2.2 Digging trench
♦ When digging trench, it shall be considered that backfiller will be filled back to the bottom of trench at the time of backfilling.
♦ When digging trench, the place where two pipes will be jointed shall be given sufficient space for convenience of joining.
♦ Except in special case, the side of trench shall be straight, the bottom of trench (except the space for joint) shall be level as much as possible. When digging by machinery, man power shall be applied to clear the bottom of trench.
♦ Generally support of trench wall shall be made parallelly to trench, especially in case the earth is very soft or the width of trench exceeds 2 m for large sizes of pipes.
♦ Drainage equipment shall be needed to prevent from rain or leakage of underground water during digging.
2.3 Installation
♦ Equipment and tools shall be prepared well and checked frequently.
♦ Cement lining shall not be dammaged.
♦ Spigot of pipes shall be prevented from shocking to avoid oval which will cause trouble in installation.
♦ Pipes shall be installed horizontal. When pipe line goes upward, pipes shall be installed from lower place to higher place, and socket shall be in direction to higher place.
♦ Joint shall be installed as per instructions.
♦ As tyton type push-on flexible joint ductile iron pipes have feature of watertight by their selfsealing and rubber gaskets, rubber gaskets shall be protected to avoid sunlight and rain as well as contact with oil.
♦ After a workday is over, the end of last pipe shall be covered to prevent sand from coming into pipe.
♦ After finishing joint, pipes may rise moving before backfilling if there is water in trench, so it is necessary to drain and fill back in time.
♦ For parts of pipe line which are finished installation, water pressure test shall be applied section by section.
♦ After cutting pipes, spigot shall be bevelled to angle of 30; from pipe axis with file or sand wheel.
♦ In case the cut end is oval, correction shall be made on site and then the end shall be bevelled for joint.
♦ In case size of the cut end is a bit larger, the end shall be ground to specification with sand wheel or other grinding tool, then joint will be made.
2.4 Backfiring
♦ There is no specific requirement for earth to be filled back, but sand or good original earth dug from trench will be better to be used as backfiller that contacts directly with pipes.
♦ In case the earth is soft, sand shall be filled back to the middle of pipe size or the top of pipe. Be sure not to let installed pipes sink.
♦ Underground water shall be drained as much as possible.
♦ Attention shall be paid to fill the earth equally along both sides of pipe barrel and fill fully at the bottom of pipes.
3. Main points of installation
3.1 Main points of installation of tyton type,push-on, flexible joints centrifugal cast ductile iron pipe.
3.1.1 Carefully clean out the earth, sand and other miscellany from socket end internal and spigot end external.
a. Clean socket end internal with cotton yarn or cotton cloth, steel wire brush, curved screwdriver carefully.
(See Fig.No.6)
b. Clean spigot end external with scraper, steel wire brush and cotton yarn carefully.(See Fig.No.7)
3.1.2 Install rubber gasket
a.First clean rubber gasket,then made it be like "heart"or "8" sharp.(See Fig.No.8)
b.Put rubber gasket into socket end according to the Fig.No.9.
c.Squeeze rubber gasket and make it be in the right position according to the Fig.No.10.
d. Check if rubber gasket is in the right position. If O.K.,then put on lubricant,such as soap solvent,if not,then reinstall rubber gasket.(See Fig.No.11)
3.1.3 Put lubricant(such as soap solvent) on the external surface at a distance of 100-110mm to spigot end.
Note: Oil has a bad effects on rubber gasket, so oil is permitted used as lubricant.
3.1.4 Adjust and rectify pipes horizontal position, then move spigot end and put a small part of pipe into socket end.
Note: Make pipe hang in the air when pushing on, and clean all the obstruct like stone at the bottom of trench.
3.1.5 Pull the pipe into socket end.(See Fig.No. 12,13,14,15)
Note: During pulling the pipe into socket end, attention must be paid to keep the pipe horizontally, and prevent the inserting pipe from diverge.
3.1.6 There are two mark lines, pull pipe into socket end until only seeing the second line and not seeing the first line.(See Fig.No.16,17)
3.1.7 After pull the pipe into socket end, it must be checked if rubber gasket is in the right position.
3.1.8 If pipe installation is found no good ,it should be done to uninstall the pipe and reinstall the pipe as per the steps of 3.1.1 to 3.1.6. |
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