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Sand centrifugal cast iron pipe (GB/T3421-1982)
Sand centrifugal cast iron pipe (GB/T3421-1982) Sand centrifugal cast iron pipe is suitable for transporting water and gas, etc. Cast iron straight pi
Product details
Sand centrifugal cast iron pipe (GB/T3421-1982)
Sand centrifugal cast iron pipes are suitable for transporting water and gas, etc. Cast iron straight pipes are divided into two levels according to wall thickness: P and G.
(1) Size and shape
Socket cast iron straight pipe
R=C+E R1=C R2=E
Dimensions of socket cast iron straight pipes
|
Nominal diameter
DN／mm
|
Dimensions of each part/mm
|
|||
|
a
|
b
|
c
|
e
|
|
|
75~450
|
15
|
10
|
20
|
6
|
|
Over 500
|
18
|
12
|
25
|
7
|
Wall thickness and quality of sand centrifugal cast iron pipes
|
Nominal diameter
DN／mm
|
Wall thickness/mm
|
Inner diameter/mm
|
outside diameter
D2／mm
|
Effective length/mm
|
Quality of the protruding part of the socket
／kg
|
Quality of the protruding part of the socket
／kg
|
Straight section 1m mass
／kg
|
||||||
|
T
|
D1
|
5000
|
6000
|
||||||||||
|
Total mass/kg
|
|||||||||||||
|
P level
|
Grade G
|
P level
|
Grade G
|
P level
|
Grade G
|
P level
|
Grade G
|
P level
|
Grade G
|
||||
|
200
|
8.8
|
10.0
|
202.4
|
200
|
220.0
|
227.0
|
254.0
|
|
|
16.30
|
0.382
|
42.0
|
47.5
|
|
250
|
9.5
|
10.8
|
252.6
|
250
|
271.6
|
303.0
|
340.0
|
|
|
21.30
|
0.626
|
56.3
|
63.7
|
|
300
|
10.0
|
11.4
|
302.8
|
300
|
322.8
|
381.0
|
428.0
|
452.0
|
590.0
|
26.10
|
0.741
|
70.8
|
80.3
|
|
350
|
10.8
|
12.0
|
352.4
|
350
|
374.0
|
|
|
566.0
|
623.0
|
32.60
|
0.857
|
88.7
|
98.3
|
|
400
|
11.5
|
12.8
|
402.6
|
400
|
425.6
|
|
|
687.0
|
757.0
|
39.00
|
1.460
|
107.7
|
119.5
|
|
450
|
12.0
|
13.4
|
452.4
|
450
|
476.8
|
|
|
806.0
|
892.0
|
46.90
|
1.640
|
126.2
|
140.5
|
|
500
|
12.8
|
14.0
|
502.4
|
500
|
528.0
|
|
|
950.0
|
1030.0
|
52.70
|
1.810
|
149.2
|
162.8
|
|
600
|
14.2
|
15.6
|
602.4
|
599.6
|
630.8
|
|
|
1260.0
|
1370.0
|
68.80
|
2.160
|
198.0
|
217.1
|
|
700
|
15.5
|
17.1
|
702.0
|
698.8
|
733.0
|
|
|
1600.0
|
1750.0
|
86.00
|
2.510
|
251.6
|
276.9
|
|
800
|
16.8
|
18.5
|
802.6
|
799.0
|
836.0
|
|
|
1080.0
|
2160.0
|
109.00
|
2.860
|
311.3
|
342.1
|
|
900
|
18.2
|
20.2
|
902.9
|
899.0
|
939.0
|
|
|
2410.0
|
2630.0
|
136.00
|
3.210
|
379.1
|
415.7
|
|
1000
|
20.5
|
22.6
|
1000.0
|
955.8
|
1041.0
|
|
|
3020.0
|
3300.0
|
173.00
|
3.550
|
473.2
|
520.6
|
Note:
When calculating mass, the density of cast iron is 7.20g/cm3
2. Total mass=1m mass of straight part x effective length+mass of protruding part of socket (rounded to three significant figures in the calculation result).
(2) Appearance
Bending degree of sand centrifugal cast iron pipe
|
Nominal caliber DN／mm
|
Bending degree/mm
|
|
200~450
|
1.51
|
|
>1500
|
1.251
|
Note: 1. In the table, 1 represents the effective length (m) of the pipe, and the curvature is obtained by multiplying the pipe length (m) by the coefficient before 1.
2. The end face of the cast iron pipe should be perpendicular to the axis.
(3) Chemical composition
The phosphorus content WP of sand centrifugal cast iron pipes should not exceed 0.30%, and the sulfur content Ws should not exceed 0.10%.
(4) Mechanical and process performance
Bending strength of pipe ring
|
Nominal caliber DN/mm
|
Bending strength óbbMPa
|
|
≤300
|
340
|
|
350~700
|
280
|
|
≥800
|
240
|
Hydraulic test of sand centrifugal cast iron pipe
|
Types of straight pipes
|
Nominal caliber DN/mm
|
Test pressure/MPa
|
|
P level
|
≤450
|
2.00
|
|
≥500
|
1.50
|
|
|
Grade G
|
≤450
|
2.50
|
|
≥500
|
2.00
|
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