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PVC Agri/Pressure & Elastomeric Seal Ringfit Pipes

Selfit PVC-u Pipes for Agriculture & Potable Water Supply

The selfit (solvent cement joint) pipes have one end self-socketed and the other end plain and Elastomeric Seal Ringfit Pipes have sealing ring joints, which fits snugly without the use of couplers. The strong solvent cement joint and sealing ring joints are permanent and trouble-free.

Advantages

  • Selfit sockets and sealing ring joints are formed with high precision on modernised developed machines.

  • 50% saving in installation time, as compared with plain ended pipes and loose couplers.

  • The number of joints are reduced by 50%, resulting in substantial saving in labor costs.

  • Eliminates the inconvenience of loose couplers, & reduction in inventory costs.

  • Selfit and Sealing Ringfit pipes are supplied in a standard length of 6 mtrs exclusive of the socket portion.

  • Combination of air and water is very dangerous for pvc pipes.
  • Air being compressible in nature, tends to accumulate in the pipeline and in case of non-functioning of air valves it resuts in high localized pressure.
  • To avoid this phenomenon, good quality air valves should be installed at all peak points in the pipeline with a distance of 300 to 400 meters between them.
  • Air valves are of two types : single acting and double acting.
  • It is recommended that the size of the air valve be about ¼th the diameter of pipe for the admission as well as release of air.
  • The function of an air valve is the same as that of a nose in a human body.

Requirement of PVC-u Adhesive for jointing

Outside Dia.

of Pipe (mm)

Outside Dia.

of Pipe (Inch)

Approx.no of joints/kg of

Solvent Cement

20    ½ 350
25    ¾ 300
32    1 250
40    1 ¼ 200
50    1 ½ 150
63    2 125
75    2 ½ 103
90    3 79
110    4 54
140    5 36
160    6 27
180    7 21
200    8 15
225    9 12
250    10 9

Color Coding as per IS:4985 

Class Of Pipe

Pressure Class (kg/cm2)

Color Code
Class 1 2.5 Red
Class 2 4 Blue
Class 3 6 Green
Class 4 8 Brown
Class 5 10 Yellow
Class 6 12.5 Black
Plumbing Pipes 15 Pink

Selection of Pressure Class

Total Head (Meters) Pressure Class (kg/cm2)
80-100 10
60-80 8
40-60 6
25-40 4
00-25 2.5

 

 

Handling and Storage

  • PVC-u pipes should be handled with due care to avoid damage to the surface and to the ends of the pipe.
  • Dragging pipes along the ground should be strictly avoided.
  • PVC-u pipes should be loaded and unloaded by hand. Lifting chains and hooks should be used carefully.
  • PVC-u pipes should be gently lowered onto the ground and stored on flat level ground free of sharp stones or objects.
  • Each layer of pipe must have the sockets protruding and alternate layers must have socket end and plain ends as shown in figure, to ensure that the pipes are supported throughout the length.
  • Extra care must be taken to see that sockets of the bottom layer do not carry any load.
  • This can be ensured by use of suitable wooden planks or blocks.

Trench Preparation

  • The width of the trench should be as narrow as possible, allowing enough room for joining, backfilling, etc.
  • A trench width of 350 to 400 mm over the outside diameter of the pipe is found quite adequate.
  • Depth of the trench plays an important part in a good pipeline, and ideally it should be 1 meter above the top of the pipe.
  • The trench should be provided with a proper bedding layer, which should be free of stones and other such objects.
  • Proper and careful bedding of the pipeline will ensure a long service life of the entire system.

 

 

 

Nominal outside Diameter (Nominal Size) Mean Outsider Diameter Outside Diameter at any point Working  Pressure, mpa

  Class 1

0.25

  Class 2

0.40

  Class 3

0.60

  Class 4

0.80

  Class 5

1.00

  Class 6

1.25

Min Max Min Max

Avg.

Max

Min Max

Avg.

Max

Min Max

Avg.

Max

Min Max

Avg.

Max

Min Max

Avg.

Max

Min Max

Avg.

Max

Min Max
20 20 20.03 19.5 20.5                         1.5 1.1 1.5 1.8 1.4 1.8
25 25 25 24.5 25.5                   1.6 1.2 1.6 1.8 1.4 1.8 2.1 1.7 2.1
32 32 32.3 31.5 32.5                   1.9 1.5 1.9 2.2 1.8 2.2 2.7 2.2 2.7
40 40 40.3 39.5 40.5             1.8 1.4 1.8 2.2 1.8 2.2 2.7 2.2 2.7 3.3 2.8 3.3
50 50 50.3 49.4 50.6             2.1 1.7 2.1 2.8 2.3 2.8 3.3 2.8 3.3 4 3.4 4
63 63 63.3 62.2 63.8       1.9 1.5 1.9 3.7 2.2 2.7 3.3 2.8 3.3 4.1 3.5 4.1 5 4.3 5
75 75 75.3 74.1 75.9       2.2 1.8 2.2 3.1 2.6 3.1 4 3.4 4 4.9 4.2 4.9 5.9 5.1 5.9
90 90 90.3 88.9 91.1 1.7 1.3 1.7 2.3 2.1 2.6 3.7 3.1 3.7 4.6 4 4.6 5.7 5 5.7 7 6.1 7.1
110 110 110.4 108.6 114.4 2 1.6 2 3 2.5 3 4.3 3.7 4.3 5.6 4.9 5.6 7 6.1 7.1 8.5 7.5 8.7
125 125 125.4 123.5 126.5 2.2 1.8 2.2 3.4 2.9 3.4 5   5 6.4 5.6 6.4 7.8 6.9 8 9.6 8.5 9.8
140 140 140.5 138.3 141.7 2.4 2 2.4 3.8 3.2 3.8 5.5 4.8 5.5 7.2 6.3 7.3 8.7 7.7 8.9 10.7 9.5 11
160 160 160.5 158 162 2.8 2.3 2.8 4.3 3.7 4.3 6.3 5.4 6.2 8.2 7.2 8.3 9.9 8.8 10.2 12.2 10.9 12.6
180 180 180.6 177.8 182.2 3.1 2.6 3.1 4.9 4.2 4.9 7 6.4 7.1 9.2 8 9.2 11.1 9.9 11.4 13.7 12.2 14.1
200 200 200.6 197.6 202.4 3.4 2.9 3.4 5.3 4.6 5.3 7.7 6.8 7.9 10 8.9 10.3 12.3 11 12.7 15.2 13.6 15.7
225 225 225.7 222.3 227.7 3.9 3.3 3.9 6 5.2 6 8.6 7.6 8.8 11.2 10 11.5 13.9 12.4 14.3 17.1 15.3 17.6
250 250 250.8 247 253 4.2 3.6 4.2. 6.5 5.7 6.5 9.6 8.5 9.8 12.4 11 12.9 15.4 13.8 15.9 18.9 17 19.6
280 280 280.9 276.6 283.4 4.8 4.1 4.8 7.3 6.4 7.4 10.7 9.5 11 14 12.5 14.4 17.2 15.4 17.8 21.1 19 21.9
315 315 316 311.2 318.8 5.3 4.6 5.3 8.2 7.2 8.3 12 10.7 12.4 15.6 14 16.1 19.3 17.3 19.9 23.8 21.4 24.7
355 355 356.1 350.7 359.2 5.9 5.1 5.9 9.2 8.1 9.4 13.4 12 13.8 17.6 15.8 18.2 21.8 19.6 22.6 26.8 24.1 27.8
400 400 401.2 395.2 404.8 6.6 5.8 6.7 10.3 9.1 10.5 15.1 13.5 15.6 19.8 17.8 20.5 24.4 22 25.3 30.2 27.2 31.3
450 450 451.4 444.6 455.4 7.4 6.5 7.5 11.6 10.3 11.9 17 15.2 17.5 22.2 20 23 27.5 24.8 28.6 33.8 30.5 35.1
500 500 501.5 494 506 8.2 7.2 8.3 12.8 11.4 13.2 18.8 16.9 19.5 24.8 22.3 25.7 30.5 27.5 31.7 37.5 33.9 39
560 560 561.7 553.8 566.8 9.2 8.1 9.4 14.3 12.8 14.8 21 21.8 21.8 27.6 24.9 28.7 34.1 30.8 35.5 42 38 43.7
630 630 631.9 637.6 637.6 10.3 9.1 10.5 16.1 14.4 16.6 23.7 24.5 24.5 31 28 32.2 38.4 34.7 40 47.2 42.7 49.2

"MOVING FORWARD WITH TIMES"