Ductile iron pipeline advantages . OAO Lipetsk Iron Works "Svobodny Sokol".

Ductile iron pipeline advantages

Ductile iron Pipes with socket-spigot Push-On Joint System manufactured by SVOBODNY SOKOL are designed to ensure a perfect tightness which is resulting from the contact pressure between the rubber gasket inserted in the socket and the spigot end of the connected pipes.

When the pipeline is in operation the tightness of the whole push-on joint system is even strengthened by the water pressure.

The Push-On Joint System allows some angular deflection and provides some flexibility to the pipeline with no interference on the tightness.

Without any risk of losing its tightness, the pipeline can adjust to the movement of soils. This Push-On Joint System is also particularly recommended in areas with unstable soils and in seismic areas.

The Push-On Joint System, due to the allowable angular deflection, enables to adjust the pipeline route design with a higher radian and subsequently optimize construction cost and time.

The Push-on Joint System, due to the rubber gasket isolating action, prevents pipelines early corrosion resulting from stray electric currents.

Ductile Iron Pipelines combine outstanding mechanical properties and exceptional functional features of the Push-On Joint System, allowing a safe and long term operation even in
the most difficult environments such has heavy road traffic, unstable soils, seismic areas, or areas with stray electric currents.

NOMINAL DIAMETER, DN	LENGTH, M	WALL THICKNESS, MM	NOMINAL THICKNESS OF THE INNER CEMENT LINNING, MM	DEFLECTION, DEGREES	MAX. DEPTH OF COVERING SOIL UNDER HEAVY TRAFFIC ROADS, M
80	6,0	6,0	3,0	5	22,0
100	6,0	6,0	3,0	5	15,5
125	6,0	6,0	3,0	5	12,3
150	6,0	6,0	3,0	5	9,0
200	6,0	6,3	3,0	4	6,1
250	6,0	6,8	3,0	4	5,7
300	6,0	7,2	3,0	4	5,3
350	6,0	7,7	5,0	3	4,9
400	6,0	8,1	5,0	3	4,5
500	6,0	9,0	5,0	3	4,2
600	6,0	9,9	5,0	3	3,8
700	6,0	10,8	6,0	2	3,7
800	6,0	11,7	6,0	2	3,6
900	6,0	12,6	6,0	1,5	3,5
1000	6,0	13,5	6,0	1,5	3,5

NOMINAL DIAMETER DN, MM	DUCTILEIRON PIPE CLASS K9 OPERATING PRESSURE (MPA) FOR:
	SOCKET TYTON JOINT		RESTRAINED SOCKET JOINT		FLANGED JOINT
	ALLOWABLE OPERATING PRESSURE*	MAXIMUM OPERATING PRESSURE **	ALLOWABLE OPERATING PRESSURE	MAXIMUM OPERATING PRESSURE	ALLOWABLE OPERATING PRESSURE	MAXIMUM OPERATING PRESSURE
80	6,4	7,7	8,8	10,6	2,5	2,5
100	6,4	7,7	7,5	9,0	2,5	2,5
125	6,4	7,7	6,3	7,6	2,5	2,5
150	6,4	7,7	6,7	8,0	2,5	2,5
200	6,2	7,5	4,9	5,9	2,5	2,5
250	5,4	6,5	3,6	4,3	2,5	2,5
300	4,9	5,9	3,4	4,1	2,5	2,5
350	4,5	5,4	3,0	3,6	2,5	2,5
400	4,2	5,0	2,5	3,0	2,5	2,5
500	3,8	4,6	2,5	3,0	2,5	2,5
600	3,6	4,4			1,6	1,6
700	3,4	4,1			1,6	1,6
800	3,2	3,9			1,6	1,6
900	3,1	3,8			1,6	1,6
1000	3,0	3,6			1,6	1,6

Refer to the manufacturer for the maximum allowable operating pressure in the pipeline (depending on the type and field of application of the joint).
All pipes are subjected to the manufacturer’s pressure test:
DN 80-300 mm - 5,0 MPa;
DN 350-600 mm - 4,0 MPa;
DN 700-1000 mm - 3,2 MPa.

Pipes and fittings manufactured at SVOBODNY SOKOL have a high safety margin above the maximum allowable pressure mentioned in the table.

* Allowable Operating Pressure – internal pressure, excluding surge, which the pipeline can safely withstand in permanent service;
** Maximum Operating Pressure - maximum internal pressure including surge, which the pipeline can safely withstand in service.

–	Mechanical Properties of Ductile Iron Pipes

–	Ductile iron pipeline advantages

–	Range of joints

–	Assembling pipes and fittings

–	Pipe packing