STORAGE AND HANDLING

STORAGE
Care should be taken at all the times in handling of pipes to avoid damage to the pipe surface and to the pipe ends, which are prepared for joining.

UPVC pipes and fittings should ideally be stored in a well ventilated and shady area, away from direct sunlight.

Pipes should always be stored on a reasonable level and flat surface which is free from stones and sharp projection so that the pipe is supported throughout its length. Wooden battens with a minimum width of 75 mm (3 inches) whose centers are one meter apart should be used.

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HANDLING
Staking of the pipes should be in such away that each layer of pipe must have the sockets protruding. Alternate layers must have socket ends & plain ends, to ensure that pipes are supported through out their whole length. Extra care should be taken to see that socket of the bottom layer do not carry any extra load.

Solvent cement and lubricant should always be stored in a cool and dry place.

Pipes should always be stored on a reasonable level and flat surface which is free from stones and sharp projection so that the pipe is supported throughout its length. Wooden battens with a minimum width of 75 mm (3 inches) whose centers are one meter apart should be used.

(c) Electrical Resistance
UPVC / CPVC has a resistivity of greater than 1014 Ohm.cm, and has good insulating properties. UPVC/ CPVC Pipes cannot be used for earthing.

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TRENCH PREPARATION
The trenching should be done just ahead of the pipe laying the pipe joining should be backfilled as soon as possible, after the pipes have been tested.
The width of the trench at the crown of the pipe should be as narrow as practicable. Normally it should be the outside diameter of the pipe plus 350mm-400mm to allow proper compaction of the side fills and at a height of 225 mm above the crown of the pipe.
The minimum depth should be width plus outer diameter of pipe, or 0.75 m above the crown of pipe, whichever is more. In case of roads it should be minimum 1.2 mtrs.
Minimum bedding for the pipes crown(below) should be 100-150mm and cover above crown 300mm
Backfill material must be free from sharp edged objects, stones etc.. Ash-dug or fine clay or sand are best backfill material.

cvpc-pipe

JOINTING INSTRUCTIONS Cold welding process for CPVC/UPVC & Pressure Pipes

 

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1)

Cutting the pipe: Cut the pipe square with hand saw with suitable guide or by pipe cutter.

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2)

Joint preparation : Chamfer or de-burr pipe or both, approximately at 100-150. Remove burrs from inside and outside surface with a knife, file or abrasive paper.
Test dry fit of the joint : Insert the pipe into the fitting and check that the interference occurs about 1/3rd to 2/3rd of the socket depth. Too tight or too loose fitment may lead to leak, hence should be avoided.
Cleaning : Remove any dirt, moisture or grease from pipe end and fitting sockets with a clean dry rag.

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3)

Application of solvent cement : Apply cement lightly but uniformly to inside of socket and outside of pipe end. Apply cement quickly to prevent it from drying and be sure to completely cover all jointing surface area of the pipe and fitting. Do not apply excessive cement in bell socket.

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4)

Assembly of joint : Immediately after applying 4he last coat of cement to the pipe and while cement is still fluid or wet forcefully bottom the male end of the pipe in the socket, giving pipe or fitting ¼th turn (but not after pipe is bottomed) to distribute the cement evenly. Remove excess cement from the pipe at the end of the fitting socket.


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5)

The joint must not be disturbed immediately after cementing. Allow cement to cure before pressurizing the system. Recommended curing time is 12 hours min. cure time is depends on weather conditions.

 

RINGFIT JOINTING METHOD for Soil, Waste & Rain water (SWR):CUT PIPE: Cut pipe square..
REMOVE BURR AND BEVEL: Remove all burr from inside and outside of pipe with a knife-edge, file, or de-burring tool. Chamfer (bevel) the end of the pipe 10° – 15°
CLEAN: Remove surface dirt, grease, or moisture with a clean dry cloth.
INSERT PIPE: Insert the pipe in to the socket without the seal ring and mark along the pipe, when it fully inserted.
FIX RUBBER RING: Fix the rubber ring in the groove without twisting it.
APPLY LUBRICANT: Apply jointing lubricant to the chamfered end of the pipe and on rubber ring up to the mark made on spigot or to the socket end of fitting.
JOIN PIPE AND FITTINGS: Push the pipe firmly into the socket till the gap between the mark on the spigot and the socket is about 10 mm to allow thermal expansion.

SOLVENT CEMENT CONSUMPTION
Consumption of Solvent Cement (UPVC)

Pipe Size (in) ½ ¾ 1 1 ¼ 1 ½ 2 3 4
No. of joints per liter 270 160 148 106 74 42 32 21
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SOLVENT CEMENT CONSUMPTION
Consumption of Solvent Cement (Pressure pipes )

Pipe Size (in) 20 25 32 40 50 63 75 90 110 140 160 180 200
Appx. No. of Joints which can made per liter of solvent cement 324 270 225 180 130 125 103 79 54 36 27 25 15


 

SOLVENT CEMENT CONSUMPTION
Consumption of Solvent Cement (CPVC )

Pipe Size (in) ½ ¾ 1 1 ¼ 1 ½ 2
No. of joints per liter 1200 750 500 450 325 225
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Rubber Lubricant for Rubber Ring Joint

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