Ductile iron pipes

Ductile Iron Pipes (Push In Joint) acc. to IS02531 Internally Lined by Portland Cement Mortar (type 5) acc. To IS04179, Externally Coated by Metal Zinc Anticorrosion acc. to IS08179 and Bitouminous Final Layer L=6 m, with EPDM Rubber Gasket acc.to IS04633.

Advantages of ductile iron pipes

• High corrosion resistance
• Long lifetime
• High value of scrap
• Desirable mechanical properties (tensile strength, elongation and high buckling strength)
• Suitable for applications with high stress and high surge pressure because of its strength, excellent elastic properties and ductility
• High resistance to traffic loads and land slide
• High impact resistance
• Insensitivity to ovality in compare with other pipe types
• Less sensitivity to trench preparation
• Proper angular and longitudinal displacement
• High installation speed (atmospheric agents has less effect on the installation of ductile iron pipes)
• Ability to cut and branching if necessary
• Not sensitive to sunlight and UV rays
• High resistance to human and plant factors
• Insensitivity to temperature
• High hydraulic flow coefficient (due to the internal cement lining with centrifugal method)
• Low maintenance costs (no need for cathodic protection)
• Less pumping costs due to a larger nominal diameter and a high coefficient for hydraulic flow
• Traceability using metal detectors

Traceability with metal detectors.

K9 Ductile iron pipes with nodular graphite (ductile iron)

Nominal Diameter DN	Outside Diameter DE	Fan outer diameter ØD	Funnel length Р	Cement layer thickness e1	Pipe thickness e	Weight per meter length (including bell)		Total weight of 6m pipe (including socket)
						Pipe	Pipe and cement	Pipe	Pipe and cement
100	118	163	88	3	6	15,6	17,7	94	106
150	170	217	94	3	6	22,9	26,1	137	156
200	222	278	100	3	6.3	31,8	36,1	191	217
250	274	332	105	3	6.8	42,8	48,2	257	289
300	326	393	110	3	7.2	54	60,4	324	363
350	378	442	110	5	7.7	67,3	79,7	404	478
400	429	500	110	5	8.1	80,3	94,4	482	566
500	532	604	120	5	9	111	128,6	666	771
600	635	713	120	5	9.9	146,3	167,4	878	1004
700	738	825	150	6	10.8	187,9	217,4	1128	1304
800	842	935	160	6	11.7	234,7	268,4	1408	1611
900	945	1044	175	6	12.6	285	322,8	1710	1937
1000	1048	1153	185	6	13.5	339,8	381,9	2039	2291
1100	1152	1261	160	6	14.4	389,1	435,4	2335	2613
1200	1255	1366	165	6	15.3	449,6	500,1	2697	3001
1400	1462	1589	240	9	17.1	598,6	686,9	3592	4121
1500	1565	1697	250	9	18	676,4	771	4059	4626
1600	1668	1806	260	9	18.9	760,2	861,1	4561	5166
1800	1875	2024	270	9	20.7	940,7	1054,2	5644	6325
2000	2082	2242	290	9	22.5	1144,2	1270,3	6865	7622

Permissible pressure for ductile iron pipes K9
DN	Permitted working pressure PFA (bar)	Maximum permitted operating pressure PMA (bar)	Permitted test pressure PEA (bar)
100	85	102	107
150	79	95	100
200	62	74	79
250	54	65	70
300	49	59	64
350	45	54	59
400	42	51	56
500	38	46	51
600	36	43	48
700	34	41	46
800	32	38	43
900	31	37	42
1000	30	36	41
1100	29	35	40
1200	28	34	39
1400	28	33	38
1500	27	32	37
1600	27	32	37
1800	26	31	36
2000	26	31	36

The arrangement of the trench for pipes made of high-strength cast iron (K9) with spherical graphite (HCSHG) will vary depending on the required pressure and depth of the trench. Below are 5 different types of pipe laying.

Minimum laying condition for K9 Ductile Iron Pipes vs Depth of Cover (with traffic load)

C-class Ductile Iron pipes

The embankment around the K9 ductile iron pipes will vary according to the working pressure and depth of the trench. Accordingly, 5 different types of embankments are defined as follows.

Minimum laying conditions for C-class Ductile Iron Pipes vs Depth of Cover (with traffic load)

Angular deviation table for ductile iron pipes

DN	Maximum permissible angular deviation (α)	Offset at the end of a 6-meter pipe (Δ)
100-300	5°	50 cm
350-400	4°	40 cm
500-1000	3°	30 cm
1100-1200	2°	20 cm
1400-2000	1°	10 cm