Ductile Iron Pipe

1. Ductile Iron Pipe according to ISO 2531, ISO8179-1, ISO 4178. 2 Exported to supply Spainish, France. 3. timely shipment.

Weight of ductile cast iron pipes with T type joint

(GB/T13295-91)

Nominal diameter DN(mm)	External diameter DE(mm)	Wall thickness T(mm)			Socket weight(Kg)	Unit weight (Kg/m)			Total weight(Kg) (6000mm long)
		K8	K9	K10		K8	K9	K10	K8	K9	K10
100	118		6.1		4.3	14.9	15.1		93.7	95
150	170	6.0	6.3		7.1	21.8	22.8		138	144
200	222		6.4		10.3	28.7	30.6		183	194
250	274		6.8	7.5	14.2	35.6	40.2	44.3	228	255	280
300	326	6.4	7.2	8.0	18.9	45.3	50.8	56.3	290	323	357
350	378	6.8	7.7	8.5	23.7	55.9	63.2	69.6	359	403	441
400	429	7.2	8.1	9.0	29.5	67.3	75.5	83.7	433	482	532
500	532	8.0	9.0	10	42.8	92.8	104.3	115.6	600	669	736
600	635	8.8	9.9	11	59.3	122	137.3	152	791	882	971
700	738	9.6	10.8	12	79.1	155	173.9	193	1009	1123	1237
800	842	10.4	11.7	13	102.6	192	215.2	239	1255	1394	1537
900	945	11.2	12.6	14	129.0	232	260.2	289	1521	1690	1863
1000	1048	12.0	13.5	15	161.3	275	309.3	343.2	1811	2017	2221
1200	1265	13.6	15.3	17	237.7	374	420.1	466.1	2482	2758	3034

Ductile cast iron is a kind of alloy ,carbon and silicon ,in which graphite exists in the type of spherical, generally the size of graphite is 6~7 class ,and spheroidization grade of the pipe should be controlled 1~3 class(spheroidization rate is not below 80%).Thus after spheroidization,ductile cast iron possesses the nature of iron as well as the characteristics of steel.After annealing ,its microstructure contains ferrite and a little pearlite possessing excellent mechanical properties.

	Ductile cast iron pipe	Grey iron pipe	Stell pipe
Tensile strength (MPa)	≥ 420	150--260	≥ 400
Yield strength (MPa)	≥ 300	NO confirmation	NO confirmation
Bending strength (MPa)	≥ 590	200--360	≥ 400
Elongation (%)	≥ 10	Neglected	≥ 18
Brinell hardness (HBS)	≤ 230	≤ 230	140
After annealing , the microstructure of ductile cast iron pipes is ferrite and a little pearlite , possessing excellent mechanical properties.

   The production process of ductile cast iron pipes strictly conforms to the international standard and European standard , as well ductile cast iron pipe is of excellent impact strength so that could moderate the requirements of construction of pipeline bed and protection layer, thus laying pipeline could be economical and reliable. In addition , external zinc spraying ,bitumen and epoxy coating , internal cement lining etc. could ensure the internal and external anti-corrosion of pipeline. The quality of zinc spraying of Yongtong company conforms of ISO8179 could ensure mortar firm, dense, smooth and adhesive. Its thickness is as followed list.

The hydraulic test pressure of the ductile cast pipes is as follows
Nominal diameter DN mm	Hydraulic test pressure (MPa)
80≤DN≤300	5
350 ≤ DN ≤ 600	4
700≤DN≤1000	3.2

Ductile Iron Pipe