Company Info
Metals International Limited is a worldwide leading company specializing in all kinds of pipes and steel products.
We sold 40,000 metric tons of API X70 PSL 2 24" ERW line pipe (the first and highest ERW line pipe ex-China) & 20,000 metric tons of API 5L X52 40"/48" DSAW/LSAW line pipe for Ambatovy Project, Madascar, 105,000 metric tons of spiral welded line pipe (one of the biggest line pipe order ex-China) for New Skikda LNG Project, Algeria ,1200 metric tons of ASME SA213 T11/T22 38.0mm B... view more
Company Profile
OEM Services Provided:
NO
Business Type:
Manufacturer, Trading Company, Distributor/Wholesaler
Quality Certificate:
CE, GB, ISO9001, ISO14000, OHSMS, RoHS, UL
Main Export Markets:
North America, Western Europe, Eastern Europe, South America, Southeast Asia, Eastern Asia, Mid East, Oceania, Africa
Basic Info.
Means of Transport:Ocean
Supply Capacity
DUCTILE IRON PIPE
Nominal Thicknesses for Standard Pressure Classes of Ductile Iron Pipe
Size in.
Outside Diameter in.
Pressure Class
150
200
250
300
350
Nominal Thickness -- in.
3
3.96
-
-
-
-
0.25*
4
4.80
-
-
-
-
0.25*
6
6.90
-
-
-
-
0.25*
8
9.05
-
-
-
-
0.25*
10
11.10
-
-
-
-
0.26
12
13.20
-
-
-
-
0.28
14
15.30
-
-
0.28
0.30
0.31
16
17.40
-
-
0.30
0.32
0.34
18
19.50
-
-
0.31
0.34
0.36
20
21.60
-
-
0.33
0.36
0.38
24
25.80
-
0.33
0.37
0.40
0.43
30
32.00
0.34
0.38
0.42
0.45
0.49
36
38.30
0.38
0.42
0.47
0.51
0.56
42
44.50
0.41
0.47
0.52
0.57
0.63
48
50.80
0.46
0.52
0.58
0.64
0.70
54
57.56
0.51
0.58
0.65
0.72
0.79
60
61.61
0.54
0.61
0.68
0.76
0.83
64
65.67
0.56
0.64
0.72
0.80
0.87
*Calculated thicknesses for these sizes and pressure ratings are less than those shown above. Presently these are the lowest nominal thicknesses available in these sizes.
Pressure classes are defined as the rated water working pressure of the pipe in psi. The thickness shown above are adequate for the rated water working pressure plus a surge allowance of 100 psi. Calculations are based on a minimum yield strength in tension of 42,000 psi and 2.0 safety factor times the sum of working pressure and 100 psi surge allowance.
Thickness can be calculated for rated water working pressure and surges other than the above.
Ductile Iron pipe is available for water working pressures greater than 350 psi.
Pipe is available with thicknesses greater than Pressure Class 350.
Specifications
AWWA Standards
The following standards are available from the American Water Works Association:
ANSI/AWWA C104/A21.4 -- American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
ANSI/AWWA C105/A21.5 -- American National Standard for Polyethylene Encasement for Ductile-Iron Pipe Systems
ANSI/AWWA C110/A21.10 -- American National Standard for Ductile-Iron and Gray-Iron Fittings, 3-inch through 48-inch, for Water and Other Liquids
ANSI/AWWA C111/A21.11 -- American National Standard for Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings
ANSI/AWWA C115/A21.15 -- American National Standard for Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges
ANSI/AWWA C116/A21.16 -- American National Standard for Protective Fusion-Bonded Epoxy Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings for Water Supply Service
ANSI/AWWA C150/A21.50 -- American National Standard for the Thickness Design of Ductile-Iron Pipe
ANSI/AWWA C151/A21.51 -- American National Standard for Ductile-Iron Pipe, Centrifugally Cast, for Water
ANSI/AWWA C153/A21.53 -- American National Standard for Ductile-Iron Compact Fittings, 3-inch through 24-inch and 54-inch through 64-inch, for Water Service
ANSI/AWWA C600 -- AWWA Standard for Installation of Ductile-Iron Water Mains and Their Appurtenances
ASTM Standards
The following standards are available from the American Society for Testing and Materials
ASTM A674 – Standard Practice for Polyethylene Encasement for Ductile Iron Pipe for Water and Other Liquids
ASTM A716 – Standard Specification for Ductile Iron Culvert Pipe
ASTM A746 – Standard Specification for Ductile Iron Gravity Sewer Pipe
AWWA Manual on Ductile Iron Pipe and Fittings
The following manual is available from the American Water Works Association
Ductile-Iron Pipe and Fittings (AWWA Manual M41) – This manual provides both technical and general information to aid in the design, specification, procurement, installation, and understanding of ductile iron pipe and fittings. It is intended for use by utilities and municipalities of all sizes, as well as, design engineers and consultants.
