Ductile Iron Pipes - Diameter 800mm, Class K9, Conforming to GB/T13295
Ductile iron pipes have emerged as a cornerstone in modern infrastructure, playing a pivotal role in various industries, especially in water supply, sewage systems, and industrial fluid transportation. Among the diverse range of ductile iron pipes available, those with a diameter of 800mm, class K9, and compliant with the GB/T13295 standard stand out for their exceptional quality and performance.
1. Pipe Dimensions and Structure
Diameter and Wall Thickness
The 800mm diameter of these pipes is carefully engineered to meet the demands of large - scale fluid conveyance. This size allows for a substantial flow rate, making it suitable for applications such as main water supply lines in urban areas or large - scale industrial plants. The wall thickness, corresponding to class K9, is precisely determined. Class K9 pipes are designed to withstand specific pressure requirements, ensuring reliable operation under normal and even some extreme conditions. The wall thickness not only contributes to the pipe's structural integrity but also plays a crucial role in resisting external forces, such as soil pressure in buried installations.
Pipe Length
Typically, these pipes are available in standard lengths, which are optimized for ease of transportation and installation. The standard lengths are carefully selected to balance the need for efficient handling on construction sites and minimizing the number of joints required during installation. Each length is manufactured with high precision to ensure a seamless fit when connected to other pipes in the pipeline system.
2. Material Composition
Ductile iron, the core material of these pipes, is a remarkable alloy. It is primarily composed of iron, carbon, and silicon, with a small amount of magnesium added during the manufacturing process. The addition of magnesium is a key step in transforming the graphite in the iron from a flake - like structure (as in gray cast iron) to a spherical or nodular form. This nodular graphite structure significantly enhances the mechanical properties of the iron. Ductile iron has much higher tensile strength, elongation, and impact resistance compared to traditional gray cast iron. As a result, the 800mm diameter K9 pipes can better withstand internal pressure fluctuations, external mechanical stress, and the rigors of installation and long - term use.
3. Manufacturing Process
Melting and Pouring
The manufacturing process of these ductile iron pipes begins with the careful melting of high - quality raw materials. The iron, carbon, and silicon are melted in a furnace under precisely controlled temperature and chemical conditions. Once the molten metal reaches the desired composition and temperature, magnesium is introduced in a controlled manner to initiate the nodularization of the graphite. The molten ductile iron is then poured into specially designed molds. These molds are typically made of sand or metal, depending on the specific manufacturing method. The pouring process is carried out with great precision to ensure uniform filling of the mold and the formation of a consistent pipe shape.
Heat Treatment
After casting, the pipes often undergo heat treatment processes. Heat treatment is crucial for further enhancing the mechanical properties of the ductile iron. It helps to relieve internal stresses generated during the casting process, refine the microstructure of the metal, and improve the overall toughness and strength of the pipes. Different heat treatment methods, such as annealing or quenching and tempering, may be applied depending on the specific requirements of the final product.
Surface Treatment
To protect the pipes from corrosion, a series of surface treatment steps are carried out. The most common surface treatment for ductile iron pipes is the application of a zinc - based coating. The zinc coating acts as a sacrificial anode, protecting the iron substrate from rusting. After the zinc coating, a layer of bitumen or other protective coatings is often applied. This additional layer provides further protection against moisture, chemicals, and environmental factors, significantly extending the service life of the pipes.
4. Compliance with GB/T13295 Standard
The GB/T13295 standard is a comprehensive set of requirements and specifications for water - supply and sewerage ductile iron pipes, fittings, and accessories. Pipes with a diameter of 800mm, class K9, compliant with this standard, must meet strict quality control measures. This includes dimensional accuracy, mechanical property requirements, and corrosion resistance tests. The standard ensures that the pipes can withstand the internal pressure of the fluid being transported, as well as external loads such as soil pressure and traffic loads in buried applications. It also specifies the requirements for the quality of joints between pipes, ensuring a leak - tight and durable connection. Compliance with GB/T13295 guarantees that these ductile iron pipes are suitable for use in critical infrastructure projects, providing reliable and long - lasting performance.
5. Applications
Water Supply Systems
In water supply systems, 800mm diameter K9 ductile iron pipes are used as main transmission lines. They can transport large volumes of potable water from treatment plants to distribution networks in cities, towns, and industrial parks. Their smooth inner surface reduces friction, allowing for efficient water flow and minimizing energy consumption. The excellent corrosion resistance ensures that the water quality remains uncompromised during transportation, protecting public health.
Sewage and Wastewater Systems
For sewage and wastewater systems, these pipes are equally essential. They can handle the conveyance of raw sewage, effluent, and stormwater runoff. The high - strength and durability of the ductile iron pipes enable them to withstand the harsh chemical and biological environments present in sewage, as well as the high - pressure surges that can occur during peak flow periods. The leak - tight joints prevent the leakage of sewage, protecting the environment from contamination.
Industrial Applications
In industrial settings, such as power plants, refineries, and manufacturing facilities, these pipes are used to transport various fluids, including cooling water, process water, and industrial chemicals. Their ability to withstand high - temperature and high - pressure conditions, along with their resistance to chemical corrosion, makes them an ideal choice for these demanding applications.
In conclusion, the 800mm diameter K9 ductile iron pipes compliant with GB/T13295 are a high - performance solution for a wide range of infrastructure applications. Their robust construction, excellent material properties, and strict compliance with standards make them a reliable and long - lasting choice for ensuring the efficient and safe transportation of fluids in modern society.
| High-quality Ductile iron Pipe Parameters. |
| Specification |
K7 Wall Thickness/mm |
K8 Wall Thickness/mm |
K9 Wall Thickness/mm |
Theoretical Weight/Ton |
| Nominal Wall Thickness |
Minimum Wall Thickness |
Nominal Wall Thickness |
Minimum Wall Thickness |
Nominal Wall Thickness |
Minimum Wall Thickness |
| DN80 |
/ |
/ |
/ |
/ |
6 |
4.7 |
0.077 |
| DN100 |
4.2 |
2.9 |
4.8 |
3.5 |
6 |
4.7 |
0.095 |
| DN150 |
4.55 |
3.25 |
5.2 |
3.9 |
6 |
4.7 |
0.144 |
| DN200 |
4.9 |
3.6 |
6.5 |
4.3 |
6.3 |
4.8 |
0.194 |
| DN250 |
5.25 |
3.95 |
6 |
4.7 |
6.8 |
5.25 |
0.255 |
| DN300 |
5.6 |
4.3 |
6.4 |
4.8 |
7.2 |
5.6 |
0.323 |
| DN350 |
5.95 |
4.65 |
6.8 |
5.15 |
7.7 |
6.05 |
0.403 |
| DN400 |
6.3 |
4.6 |
7.2 |
5.5 |
8.1 |
6.4 |
0.482 |
| DN450 |
6.65 |
4.9 |
7.6 |
5.85 |
8.6 |
6.85 |
0.577 |
| DN500 |
7 |
5.2 |
8 |
6.2 |
9 |
7.2 |
0.669 |
| DN600 |
7.7 |
5.8 |
8.8 |
6.9 |
9.9 |
8 |
0.882 |
| DN700 |
8.4 |
6.4 |
9.4 |
7.6 |
10.8 |
8.8 |
1.123 |
| DN800 |
9.1 |
7 |
10.4 |
8.3 |
11.7 |
9.6 |
1.394 |
| DN900 |
/ |
/ |
11.2 |
9 |
12.6 |
10.4 |
1.691 |
| DN1000 |
/ |
/ |
12 |
9.7 |
13.5 |
11.2 |
2.017 |
| DN1200 |
/ |
/ |
13.6 |
11.1 |
15.3 |
12.8 |
2.758 |
| DN1400 |
/ |
/ |
15.2 |
12.5 |
17.1 |
14.4 |
3.669 |
| DN1500 |
/ |
/ |
16 |
13.2 |
18 |
15.2 |
4.175 |
| DN1600 |
/ |
/ |
16.8 |
13.9 |
18.9 |
16 |
4.668 |
| DN1800 |
/ |
/ |
18.4 |
15.3 |
20.7 |
17.6 |
5.803 |
| DN2000 |
/ |
/ |
20 |
16.7 |
22.5 |
19.2 |
7.043 |
| DN2200 |
/ |
/ |
21.6 |
18.1 |
24.3 |
20.8 |
8.332 |
| DN2400 |
/ |
/ |
23.2 |
20.3 |
26.1 |
22.4 |
9.822 |
| DN2600 |
/ |
/ |
24.8 |
20.9 |
27.9 |
24 |
11.392 |
| K7, K8, and K9 are all calculated based on the same theoretical weight. |
| Pressure - Bearing Performance Parameters of Ductile Iron Pipes |
| DN |
DE(mm) |
Pressure Rating |
Radial Rigidity
(KN/M²) |
Nominal Wall Thickness
(mm) |
PFA
MPA |
PAM
MPA |
PEA
MPA |
| DN80 |
98 |
C40 |
856 |
4.4 |
4.0 |
4.8 |
5.3 |
| DN100 |
118 |
C40 |
481 |
4.4 |
4.0 |
4.8 |
5.3 |
| DN125 |
144 |
C40 |
271 |
4.5 |
4.0 |
4.8 |
5.3 |
| DN150 |
170 |
C40 |
163 |
4.5 |
4.0 |
4.8 |
5.3 |
| DN200 |
222 |
C40 |
84 |
4.7 |
4.0 |
4.8 |
5.3 |
| DN250 |
176 |
C30 |
52 |
4.9b |
3.0 |
3.6 |
4.1 |
| DN300 |
326 |
C30 |
34 |
5.1 |
3.0 |
3.6 |
4.1 |
| DN350 |
378 |
C30 |
44 |
6.3b |
3.0 |
3.6 |
4.1 |
| DN400 |
429 |
C25 |
34 |
6.5b |
3.0 |
3.6 |
4.1 |
| DN450 |
480 |
C25 |
23 |
6.5b |
2.5 |
3.0 |
3.5 |
| DN500 |
532 |
C25 |
17 |
6.5 |
2.5 |
3.0 |
3.5 |
| DN600 |
635 |
C25 |
17 |
7.6b |
2.5 |
3.0 |
3.5 |
| DN700 |
738 |
C25 |
17 |
8.8b |
2.5 |
3.0 |
3.5 |
| DN800 |
842 |
C25 |
15 |
9.6 |
2.5 |
3.0 |
3.5 |
| DN900 |
945 |
C25 |
15 |
10.6 |
2.5 |
3.0 |
3.5 |
| DN1000 |
1048 |
C25 |
14 |
11.6 |
2.5 |
3.0 |
3.5 |
| DN1100 |
1152 |
C25 |
14 |
12.6 |
2.5 |
3.0 |
3.5 |
| DN1200 |
1255 |
C25 |
14 |
13.6 |
2.5 |
3.0 |
3.5 |
| DN1400 |
1462 |
C25 |
14 |
15.7 |
2.5 |
3.0 |
3.5 |
| DN1500 |
1565 |
C25 |
14 |
16.7 |
2.5 |
3.0 |
3.5 |
| DN1600 |
1668 |
C25 |
13 |
17.7 |
2.5 |
3.0 |
3.5 |
| DN1800 |
1785 |
C25 |
13 |
19.7 |
2.5 |
3.0 |
3.5 |
| DN2000 |
2082 |
C25 |
13 |
21.8 |
2.5 |
3.0 |
3.5 |
| DN2200 |
2288 |
C25 |
13 |
23.8 |
2.5 |
3.0 |
3.5 |
| DN2400 |
2495 |
C25 |
13 |
25.8 |
2.5 |
3.0 |
3.5 |
| DN2600 |
2702 |
C25 |
13 |
27.9 |
2.5 |
3.0 |
3.5 |
| DN2800 |
2908 |
C25 |
13 |
29.9 |
2.5 |
3.0 |
3.5 |
| DN3000 |
3115 |
C25 |
13 |
31.9 |
2.5 |
3.0 |
3.5 |
Q1: Are you trading company or manufacturer ?
A1: We are factory.
Q2:Can I go to your factory to visit?
A2:Of course, we welcome customers from all over the world to visit our factory.
Q3: How long is your delivery time?
A3: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q4:What is the advantage about your company?
A4:Our company has professional team and professional production line.
Q5: The logo and the color can be customized?
A5: Yes, we welcome you to sample custom
Q6: Any other good service your company can provide?
A6:Yes,we can provide good after-sale and fast delivery.
Q7:What product information do I need to provide?
A7:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q8:Does the product have quality inspection before loading?
A8:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept the third party inspection absolutely.
Factory Introduction
We are a specialized ductile iron pipe manufacturing factory based in Shanxi, China. With a rich heritage of over 20 years in this industry, we have established ourselves as a reliable and experienced player in the global market.
Our ductile iron pipes have found their way to numerous countries across the globe. This wide - reaching export network is a testament to the trust that our international customers place in our products. The quality of our pipes has been recognized and praised by various sectors. We adhere to strict international quality standards, and our production facilities are equipped with state - of - the - art technology to ensure precision and consistency.
Each batch of our products undergoes rigorous quality control checks. We conduct comprehensive tests on factors such as pipe strength, pressure - bearing capacity, and corrosion resistance. This meticulous approach to quality control has earned us a reputation for delivering products that are not only durable but also perform optimally in diverse applications, whether it's for water supply, gas transmission, or other infrastructure projects.
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