SWG :Various Pipes



Various Pipes for Gravity Sewers

SComparative Statement

S.NO EVALUATION CRITERIA GLAZED STONEWARE PIPES
(IS:651-1980)
RCC PIPES
(IS:458-1988)
UPVC PIPES DI PIPES (IS:8329-2000) HDPE PIPES (IS:14333 -2000)
1. Available Length 0.6m 2 to 2.5m 6 or 12m 6 m 6 or 12m
2. Diameters Available 100 to 300mm for higher diameters it is
not economical.
150 to 2000mm Available up to 630mm Up to 1000mm Available up to 630mm
3. Type of Joint S&S joint with caulking yarn soaked in cement slurry or tarred gasket. Joint is covered with cement mortar. Available in both collar and S&S joints. Solvent Cement joint and Rubber Ring joint Tyton joint with rubber gasket Butt fusion welding process.
4. Weight Light Heavy Light Heavy but lighter than R.C.C. pipes. Light
5. Handling Easy due to shorter length and light weight Difficult due to heavy weight Easy due to light weight Difficult due to heavy weight in
larger dia
Easy due to light weight
6. Roughness
Coefficient of Pipe
0.012 0.011 0.011 0.011 0.011
7. Corrosion resistance Not affected by hydrogen sulphide gas. Highly corrosion resistant Subject to H2S corrosion due to acids, highly septic sewage and by highly acidic or high Sulphate soils and where velocities are not sufficient to prevent septic conditions. To prevent corrosion Sulphate resistant cement concrete to be used for pipe
manufacture.
Highly corrosion resistant Protective layers are required to protect corrosion Highly corrosion resistant
8. Life More than 50 years 30 years Life is more than 50 years due to highly corrosion
resistant.
More than 50 years Life is more than 50 years due to highly corrosion resistant.
9. Class of Pipes Available Grade A & AA (Non pressure pipes) NP1, NP2, NP3, NP4
(Non pressure pipes)
6Kg/Sq.cm, 8Kg/ Sq.cm,10Kg/Sq.cm, 12Kg/Sq.cm K-7 to K-12 K-7= 12 -
32kg/sqcm. K-9= 25 -
50kg/sqcm
Depending Upon the dia of pipe.
PN 2.5, PN4, PN6, PN10 (2.5Kg/Sq,
4Kg/Sq, 6Kg/Sq and 10Kg/Sq)
10. Requiremen ts of Special
Equipments
Not required Not required Not required Not required Welding equipment required for jointing
11. Stacking the Pipe Materials Can be stacked anywhere. Care should be taken while loading, unloading and stacking. Can be stacked anywhere. Care should be taken while loading, unloading and stacking. To avoid exposure to sunlight, it is stacked in covered area. This also requires a special type of stacking to avoid buckling and damage of pipe ends  Care should be taken while loading, unloading
and stocking.
Can be stacked anywhere. Care should be taken while loading, unloading and stocking. Same as uPVC
12. Cost of supplying, laying and jointing of meter length 200 mm: Rs. 272
250 mm: Rs: 377
300 mm: Rs: 517
(DSR 07 + 10% Price
contingency)
(NP3 Pipe) 350mm: Rs. 1134
400mm: Rs. 1234
500mm: Rs. 1568
600mm: Rs. 2102
NP2 Pipe
200 mm: Rs 248
300 mm: Rs 441
400 mm: Rs 578
500 mm: Rs 855
600 mm: Rs 1095 (UP JN)
6 kg/cm2
200mm: Rs. 604 (UPJN+20% for
laying & Price Contngency) 315mm: Rs. 1448 (MP ADB
Project+20% Price contingency)
(25 - 50 kg/cm2) K9 Pipe
200mm: Rs:2442
300mm: Rs:4505
400mm: Rs:5520
500mm: Rs:9418
600mm: Rs:12283
(UPJN Supply rate+20% for laying & price contingency)
PE 100, PN- 6
200mm: Rs. 640
315mm:Rs. 1585
400mm: Rs. 2595
500mm: Rs. 4695
630mm: Rs. 7434 (MP ADB
Project+20% Price contingency)
13. Remarks on Cost Comparatively Cheaper NP2 is Cheapest among all materials Costlier than RCC pipe but cheaper than HDPE pipes. Costlier than other pipes but cheaper than HDPE pipes. Smaller diameter pipes are cheaper and higher diameter pipes are
costlier.
14. Requiremen t in Refilling the Trench No stone or rock to be filled while refilling. No stones or rocks to be filled while refilling. Sand bedding is required to avoid the deflection of pipe due to burden of earth.
No stones or rocks to be filled while
refilling.
No stones or rocks to be filled while refilling. Concrete arch bedding is required to avoid the deflection of pipe due to burden of earth.
15. Infiltration If joints are week/poor, chance of infiltration is high due to more number of joints. Infiltration is less if rubber joints are used but joints should be proper if collar joints
are used.
Infiltration is very less Infiltration is very less Infiltration is very less
16. Workability Light weight for easy handling. For larger diameter due to heavy weight handling to be done
with care
Light weight for easy handling. Good Light weight for easy handling.
17. Effect of Radiation Not affected Not affected Affected by UV rays if stored for a
long duration in open fields hence it should be kept covered.
Not affected Affected by UV rays if stored for a long
duration in open fields hence it should be kept covered.
18. Jointing Skill Requiremen ts Requires quality supervision Jointing is easy in S&S pipes with rubber ring joints. Jointing is easy in S&S pipes using solvents. Jointing is easy in S&S pipes with rubber ring joints. Jointing is expensive and jointing results in beeding which causes obstruction for solids in
sewage
19. Protection to the Pipe Depending upon the loading conditions, pipes should be protected with either sand or Cement Concrete bedding Depending upon the loading conditions, pipes should be protected with either sand or Cement Concrete bedding Pipe should be protected against deflection due to super imposed loads. Pipe embedded portion should be well
compacted.
Not required Pipe should be protected against deflection due to super imposed loads. Pipe embedded portion should be well compacted.
20. Maintenance Almost nil if joints are properly made. Almost nil if proper velocity is maintained. Pipe may get
damaged due to rodding
Minimum Pipe may get damaged due to rodding
21. Previous Experience/ Performance In use for long period and performance is satisfactory In use for long period and performance is Good Not common for street sewers but now picking up use to connect houses
to sewer
It is durable pipe. Performance is yet to be proven Recent use started in India. It is durable

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