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Ductile Iron Pipe K9, C class

Standard: ISO 2531 & EN545 (for potable water application) EN598 (for sewage application)

K9 ductile iron pipes are known for their strength, durability, and resistance to corrosion, making them a popular choice for transporting water in municipal and industrial applications.

Wall Thickness Class: K9, Class C

Diameter Range: DN80-DN2600

Effective length: 6m or 5.7m

Accessory: Rubber Gasket (SBR, NBR, EPDM)

Pressure: 50Bar- 10Bar.

Note: The gaskets, bolts & nuts are supplied respectively as your special requirement.

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Products Description Product Dimensions

Midas Pipelines’ ductile iron pipe K9 — also known as K9 ductile iron pipe — is a high-strength, centrifugally cast pipe manufactured to ISO 2531 and EN545 standards. Designed for reliable water supply, sewage, and irrigation systems, this Class K9 pipe offers superior tensile strength, flexibility, and corrosion resistance while maintaining excellent straightness, surface finish, and dimensional accuracy.In addition, ductile iron pipes K9 are producedwith high straightness, high surface finish, high size accuracy, even wall thickness, fine mechanical properties and hard external coating. Flexible push-on joint and rubber gasket are used to result in a convenient installation of pipes.

As a professional K9 Ductile Iron Pipe Manufacturers and EN545 ductile iron pipe supplier, Midas produces push-on joint ductile iron pipe in sizes DN80 to DN2600 with cement mortar lining and zinc coating for long-term performance. Our cement lined ductile iron pipe and zinc coated ductile iron pipe solutions are trusted globally for municipal, industrial, and agricultural projects.Request a Quote Now.

Key Features of Ductile Iron Pipe K9

Variety of Joint Options:

T-Type Joint Pipe (Push-On): Easy to install and ensures a tight seal.
K-Type Joint Pipe: Offers secure and reliable connections.
Self-Restrained Joint Pipe: Resists movement and pressure surges, ensuring stability.

High Mechanical Strength: Minimum tensile strength ≥420 N/mm², yield strength ≥300 N/mm², and elongation ≥7–10% for excellent pressure and impact resistance.
Superior Corrosion Protection: Internal cement mortar lining for potable water and external zinc + polyethylene sleeving or bitumen coating for buried service.
Push-On TYTON Joint: Flexible, easy-to-install TYTON joint ductile iron pipe with SBR/NBR/EPDM rubber gaskets for quick, leak-free assembly.
Wide Size & Pressure Range: DN80–DN2600 diameters, pressure ratings 10–50 Bar, and effective lengths 5.7 m or 6 m.
Earthquake & Long Service Life: Proven low damage rate (0.04 per km) and service life exceeding 50 years under normal conditions.
Cost-Effective & Reliable: High material utilization, consistent wall thickness, and full compliance with international standards.

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Certifications

ISO9001 for quality assurance.
BV, WRAS, and SGS certifications for performance and reliability.

Ductile iron pipe mechanical properties

Ductile iron pipe

Grey Cast Iron Pipe

Steel Pipe

Tensile
strength(N/mm²)

≥420

150-260

≥400

Yield
strength(N/mm²)

300

Bending
strength(N/mm²

Min.590

200-360

Min.400

Elongation(%)

DN80-1000≥10
DN1200-2200≥7

Negligible

Min.18

Module of
Elasticity(N/mm²)

Approx.16x10

Approx.11x10⁴

Approx.16x10⁴

Hardness (HB)

≤230

Approx.140

DN(mm)							Hydro Test Pressure for K9 pipe,Mpa
80-300							5.0
350-600							4.0
700-1000							3.2
1100-2000							2.5
2200-2600							2.0

Document relevant to earthquakes shows that the damage rate per kilometer for ductile iron pipe mains is one

quarter of that for grey iron and one thirtieth of some other materials of pipes.

Pipe material							Damage rate per km of main pipeline in earthquake
Ductile iron pipe							0.04
Grey cast pipe							0.17
PVC pipe							0.14
Steel pipe							1.24

Applications of Ductile Iron Pipe K9

Our ductile iron pipe K9 and EN545 ductile iron pipe are widely used in:

Municipal water supply and distribution networks
Drainage and sewage systems
Irrigation and agricultural water conveyance
Industrial pipelines for process water and liquids

General ductile iron pipes

For potable water

ISO9001 Quality systems-model for quality assurance in design development production,installation and

ISO 2531 Ductile iron pipes,fittings and accessories for pressure pipelines.

BS EN545 Ductile iron pipes,fittingsand accessories and their joints for water pipelines.Requirements and test

"ISO4179 Ductile iron pipes for pressure and non pressure pipelines-Centrifugal cement mortar lining-general

requirements."

ISO8179 Ductile iron pipes-External zinc coating.

BS3416 Specification for Bitumen based coatings for cold application,suitable for usein contact with potable

ISO4633 Rubber Seals -joint rings for water supply,drainage and sewerage pipelines specs for materials.

ISO 8180 Ductile iron pipes -Polyethylene Sleeving.

EN681-1 Elastomeric seals material requirements for pipe joint seals used in waterand drainage application.

For sewage application

BS EN598 Ductile iron pipes,fittings,accessories and their joints for sewage application requirements and test

ISO4633 Rubber seals-joint ringsfor water supply,drainage and sewerage pipelines specs for materials.

EN681-1 Elastomeric seals material requirements for pipe joint seals used in water and drainage application.

"All MIDAS pipes are manufactured complying with standards:

-ISO2531

-EN545

-EN598"

Easy Jointing & Installation of K9 Ductile Iron Pipe

The push-on joint ductile iron pipe system requires only a rubber gasket and simple insertion — no bolts or special tools for standard lengths. This reduces installation time and labor costs significantly compared to traditional piping methods.

FAQs

What pressure levels can K9 pipes handle? K9 pipes are designed for pressure ratings ranging from 10 Bar to 50 Bar, depending on the application and pipe dimensions.
Which internal coating is best for potable water? Cement mortar linings are typically recommended for potable water, while fusion-bonded epoxy may be suitable for specific requirements.
What is the typical service life of K9 pipes? With proper maintenance, these pipes can last over 50 years, ensuring long-term reliability.
Can additional components like gaskets and bolts be provided? Yes, we supply gaskets, bolts, and nuts as per your specific requirements.
What factors influence the price of K9 ductile iron pipes? Prices depend on pipe size, wall thickness, coatings, market demand, and purchase volume. Contact us for detailed pricing.
Are custom coatings and lengths available? Yes, coatings such as PU lining and other specialized options can be provided. Standard lengths are 6m and 5.7m, but customized lengths can be arranged based on project needs.
What is the difference between K7 and K9 Ductile iron pipe? Ductile Iron Class K7 Pipes can handle less pressure than Ductile Iron Class K9 Pipes. The pressure rating of K7 ductile iron pipes varies and this would base on the Nominal Diameter and the Nominal Wall Thickness of the pipe.

Choose Midas for Ductile Iron K9 Pipes: As a trusted manufacturer, Midas provides high-quality K9 ductile iron pipes backed by certifications and competitive pricing. Contact us for detailed product information and the best pricing for your project.

Ready to source high-quality K9 ductile iron pipe?

Contact us today for ductile iron pipe K9 samples, detailed technical drawings, pressure ratings, or a personalized quote on EN545 ductile iron pipe manufacturer solutions. Fast response guaranteed for wholesale and OEM inquiries.

Product Dimensions

ISO2531,EN545,EN598

TYTON PUSH-ON SOCKET SIZES

Ductile Iron Pipe K9, C class

Type

Gasket

Socket

Spigot

DN80~1200 T type joint

Ductile Iron Pipe K9, C class

Type

Gasket

Socket

Spigot

DN1400~1800 T type joint

DN nm	DE mm		d1 mm	d2 nm		d3 mm		d5 mm		d6 mm		d7 mm	d8 mm	C mm	f mm		t1 mm
80	98	+1 -2.8	140	123	±1	100.5	±1	119.1	±1	103.2	±2	122	135	8	3.5	0 -0.8	85
100	118		190	169		120.5		138.9		123.4		142	155.7	8.4	3.5		88
150	170	+1 -2.9	217	195		172.5		190.6		175.3		195.6	209	9.1	3.5		94
200	222	-3	278	250	+1.5 -1	224.5	+1.5 -1	245.2	+1.5 -1	227.8		251	265	9.8	4		100
250	274	-3.1	336	301.5		276.5		296.9		279.7		305	323	10.5	4		105
300	326	-3.3	393	356.5	+1.8 -1	328.5	+1.8 -1	351.7	+1.8 -1	332.1		368.5	384	11.2	4.5		110
350	378	+1 -3.4	448	408		380.5		403.4		383.8		410.3	433	11.9	4.5	0 -1	110
400	429	+1 -3.5	500	462	+2.1 -1	431.5	+2.1 -1	457.2	+2.1 -1	435.8	±2.5	463	482.4	12.6	5		110
450	480	+1 -3.6	540	514	+2.2 -1	482.5	+2.2 -1	509	+2.2 -1	487		518.4	533	13.3	5		120
500	532	+1 -3.8	604	568	+2.4 -1	534.5	+2.4 -1	562.6	+2.4 -1	539.4	±3	569.7	590.6	14	5.5		120
600	635	±4	713	673.4	+2.7 -1	637.5	+2.7 -1	668	+2.7 -1	642.6		676.7	698.8	15.4	6		120
700	738	+1 -4.2	824	788	+3.5 -1	740.5	+3.5 -1	779.3	+3.5 -1	745.8	±3.5	789	813	16.8	7	0 -1.2	150
800	842	+1 -4.5	943	894	+3.8 -1	844.5	+3.8 -1	885.9	+3.8 -1	850	±3.8	892.2	922.3	18.2	8		160
900	945	+1 -4.8	1052	1000	+4.1 -1	947.5	+4.1 -1	991.3	+4.1 -1	953.2	±4.1	999.2	1030.5	19.6	9		175
1000	1048	-5	1158	1105	+4.4 -1	1050.5	+4.4 -1	1097.1	+4.4 -1	1056.4	±4.4	1106	1139	21	9		185
1100	1152	+1 -5.2	1267	1211	+4.7 -1	1155	+4.7 -1	1202.5	+4.7 -1	1160.2	±4.7	1213.5	1247.3	22.4	10		200
1200	1255	+1 -5.5	1377	1317	+5 -1	1258	+5 -1	1308	+5 -1	1264	±5	1321	1355.6	23.8	10		215
1400	1462	+1 -6	1610	1529	+5.6 -1	1465	+5.6 -1	1509	+5.6 -1	1471	±5.6	1535	1584.5	26.6			239
1600	1668	+1 -6.5	1814	1740	+6.2 -1	1673	+6.2 -1	1717	+6.2 -1	1678	±6.2	1748	一				262

ISO2531,EN545,EN598

TYTON PUSH-ON SOCKET SIZES

DN mm	t2 mm	t3 mm	t4 mm		t5 mm	t6 mm	t7 mm	t8 mm	t9 mm	t10 mm	r1 mm	r2 mm	r4 mm	r5 mm	X	Y	Mass (kgs)
80	40	12	6	0 -0.5	5	8	48	5	39	80	4	5	22	62	6	2	3.4
100	40	12	6		5	8	48	5	39	88	4	5	17	68	9	3	4.3
150	40	12	6		5	8	48	5	43	94	4	5	18.5	74	9	3	7.1
200	45	15	7		6	10	56	6.2	48	100	4	6	35	70	9	3	10.3
250	47	15	7		6	10	58	6.8	48	105	4	6	36	72	9	3	14.2
300	50	17	8.5		7	12	61	7.2	56	110	6	7	37	74	9	3	18.6
350	50	17	8.5		7	12	61	5.1	55	113	6	7	24.5	98	9	3	23.7
400	55	19	9.5		8	14	68	5.1	58	116	6	8	26	104	9	3	29.3
450	55	19	9.5		8	15	68	6	66	120	6	8	28	105	9	3	38.3
500	60	21	11		9	16	75	7	63	120	6	10	29	116	9	3	42.8
600	65	21	12		10	16	80	9.2	62	120	6	10	32	128	9	3	59.3
700	80	21	18		12	16	90	10.6	77	150	8	10	35	140	15	5	79.1
800	85	21	18	0 -0.8	14	16	96.5	12.4	86.5	160	8	10	38	160	15	5	102.6
900	90	21	20		16	16	103	14.2	92.5	175	8	10	42	175	15	5	129.9
1000	95	22	20		16	16	110	16	103	185	8	10	45	200	15	5	161.3
1100	100	24	23		18	16	116	17	107.5	200	10	12	46.5	207.5	15	5	194.7
1200	105	25	23		18	17	122	17.8	112	215	10	12	48	215	15	5	237.7
1400	115	27	25			18	125	19	119	239	10	12	100	205	20	7	279.3
1600	125	30	27			20	125	19	165	262	10	10	380	210	21	7	375.4

Nominal Size DN	Barrel			Socket mass (approximate)	Preferred pipe pressure classes	Total mass (approximate)for one working length L of
	DE	e	Mass per metre (approximate)			5.7m	6m
DN80	98	4.4	9.1	3.4	C40	55	58
DN100	118	4.4	11.1	4.3	C40	68	71
DN125	144	4.5	14.1	5.7	C40	86	90
DN150	170	4.5	16.5	7.1	C40	101	106
DN200	222	4.7	22.6	10.3	C40	139	146
DN250	274	5.5	32.6	14.2	C40	200	210
DN300	326	6.2	43.9	18.6	C40	269	282
DN350	378	6.3	51.9	23.7	C30	319	335
DN400	429	6.5	60.8	29.3	C30	376	394
DN450	480	6.9	72.3	38.3	C30	450	472
DN500	532	7.5	87.0	42.8	C30	539	565
DN600	635	8.7	120.6	59.3	C30	747	783
DN700	738	8.6	142.0	79.1	C25	888	931
DN800	842	9.6	176.9	102.6	C25	1111	1164