Sản phẩm

For city & industrial water, irrigation & agriculture water, oil & gas supply, sprinkler, fire hydrant, ship piping ect…

Chemical Requirement (%)
 
 
C
Mn
P
S
others
A
0.25
0.95
0.050
0..45
*8
B
0.30
1.20
0.050
0.045
*8
 
Physical requirement
 
 
Tensible strength Psi(MPa)
Yield strength Psi(MPa)
Elongation (Min %)
Gauge Length(in)
A
Min. 48,000 (33.8kg/mm2)
Min. 30,000 (21.1kg/mm2)
e = 625,000x
2
B
Min. 60,000 (42.2kg/mm2)
Min. 35,000 (24.6kg/mm2)
e = 625,000x
2
 
 
 

 

Kiểm tra theo yêu cầu :
 
 
Flattening Test
Bend Test
Hydrostatic Test
H = Distance between Exterior sufaces
D = Outside Diameter
Anglex Inner radius
P = Test Pressure (psi)
S = allowable fiber Stress ( psi)
ASTM A53
Apply for standard weight and extra strong pipe of NB > in.
Ductility of the weld                      H=  D
Ductility away frome the weld       H=  D
The test shall be made alternately with the weld at 0 deg. and at 90 deg.
Apply for NB ≤2in 900  x 6D
When ordered for close coliling
1800  x 4D
Specified respectively in size and grade.
Note : The Maximum pressure
NB ≤ 3 in.     p = 2,500 psi
NB > 3 in.     p = 2,800 psi
 

 

 

 

Permissible variations in dimensions
 
 
Outside Diameter
Wall Thickness
Length
Height of inside Flash
ASTM A53
NB ≤ 1 in.           ± in.
NB ≥ 2 in.             1 %
+ Not specified
 -12.5%
-
-
 

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