Shanxi Jinsuntong Ductile Iron Pipe Manufacturer Installation Points: ① Clean Pipe Ends: Remove all debris from the socket and clean it thoroughly. ② Clean and Install the Seal Ring: Clean off any adhesive from the seal ring, bend it into a "plum blossom" or "8" shape, and insert it into the socket groove. Press the entire seal ring with your hand or use a rubber hammer to ensure it is evenly seated without any twists or turns. ③ Apply Lubricant: Coat the inner surface of the installed socket with lubricant, and make sure the outer surface of the spigot is also evenly coated. ④ Lower the Pipe: Lower the pipe to the bottom of the groove according to the specifications, usually using manual or mechanical methods. ⑤ Install Equipment: Place the prepared equipment properly, being careful not to contaminate the cleaned pipe sections. ⑥ Push the Pipe into the Socket: To make insertion easier and smoother, first place the spigot into the socket over the seal ring, secure the钢丝绳 and the chain, and tighten the chain. At the same time, allow someone to shake the pipe back and forth at the pipe socket end until the spigot is fully inserted, leaving a gap of about 2mm between the socket and the spigot, and ensuring the distance from the socket's outer edge to the seal ring is consistent. ⑤ Corrosion Protection Treatments: 1. Asphalt Paint Coating: Used for gas transmission pipelines. Preheating the pipe before painting can improve the adhesion of the asphalt paint and speed up drying. 2. Cement Mortar Lining + Special Coating: This internal corrosion protection measure is suitable for sewage transmission pipelines, enhancing the lining's corrosion resistance. 3. Epoxy Coating. ⑦ Shanxi Jinsuntong Ductile Iron Pipe Fittings Installation: Due to the light weight of the fittings, using a single wire rope during installation can easily cause the fitting to twist, squeezing the rubber ring and preventing proper installation. Therefore, a method of using two parallel chain blocks to apply even force can be used for parallel installation of the fittings, preventing the seal ring from being squeezed. Alternatively, longer fittings can be used, installed with a single wire rope.
How to improve the performance of ductile iron pipes? Currently, general gray cast iron or ductile iron castings often exhibit white mouth on the surface or thin-walled sections due to rapid cooling during the casting process, making it impossible to machine the cast iron parts.
To eliminate the decrease in hardness due to white mouth, these cast iron parts are typically heated from the beginning to above the eutectoid temperature, and then held at this temperature for 1 to 2 hours to anneal. The cementite decomposes into graphite, and the cast iron parts are then slowly cooled and removed for air cooling.
.During the casting process, gray iron pipes tend to have a white mouth and higher internal stress compared to ductile iron, making it difficult to achieve a pure ferrite or spheroidite matrix in cast iron components. To enhance the ductility or toughness of cast iron, the components are often heated to 900-950℃ and held at this temperature for a sufficient period for high-temperature annealing, followed by air cooling to 600℃. If the as-cast structure consists of a matrix and spheroidal graphite, to improve toughness, it is sufficient to decompose the cementite in the spheroidite into ferrite and spheroidal graphite. For this purpose, the ductile iron pipe components are reheated to 700-760℃ near the eutectoid temperature, held at this temperature, and then air cooled to 600℃ for cooling out of the furnace. To improve the overall performance of cast iron components, the annealing of spheroidal iron pipes to enhance toughness, and normalizing, quenching, and other heat treatment processes to increase the strength of spheroidal iron.
Shanxi Jinsuntong Company has an annual production capacity of 300,000 tons for ductile iron pipes and flexible drainage pipes; among them, the annual sales volume of ductile iron pipes is 120,000 tons, and the annual sales volume of flexible drainage pipes is 180,000 tons. Our company's ductile iron pipes and flexible drainage pipes are sold to regions such as Northeast China, North China, Central Plains, and Northwest China. The specifications of the ductile iron pipes are DN80mm to DN1200mm, and the national standard for the ductile iron pipes is GB/T 13295-2008. The specifications for cast iron drainage pipes are DN50mm to DN300mm, and the standard is GB/T12772-2008. Shanxi Jinsuntong Ductile Iron Pipe Co., Ltd. has won customers with its strong technical strength, skilled workforce, and complete testing equipment. The company adheres to the business philosophy of "Integrity, Cooperation, Innovation, and Win-Win," providing excellent services to customers. We are willing to sincerely cooperate with friends from all over the world, work together, and achieve mutual benefits for a win-win future. Here, the general manager and all employees of the company will serve the vast majority of users with good reputation, strong strength, superior products, and low prices. We sincerely thank our old and new friends and customers for their continuous care, support, and assistance. We sincerely hope to establish long-term cooperative relationships with them, achieve mutual benefits, and seek common development.
Several types of elbows are available for ductile iron pipes.
Socket weld elbows of ductile iron pipe are available in T-type, K-type, N1-type, and S-type.
Ductile iron pipes are essentially spheroidal graphite cast iron pipes, as spheroidal graphite cast iron pipes possess the essence of iron and the properties of steel, hence the name. The graphite in spheroidal graphite cast iron pipes exists in a spherical form, typically ranging in size from 6 to 7 grades. In terms of quality, the spheroidizing grade of the cast iron pipes should be controlled at 1-3 grades, with a spheroidizing rate of ≥80%, thereby significantly improving the material's mechanical properties, combining the essence of iron with the properties of steel.
Features: Possesses the essence of iron, the properties of steel, excellent corrosion resistance, good ductility, easy installation, mainly used for municipal and industrial enterprises for water supply, gas transmission, etc.
Elbows come in three types from the joint perspective: flanged, socket weld, and socket plug.
1. Each type of elbow fitting comes in four angles: 90°, 45°, 22.5°, and 11.25°.
2. Therefore, there are a total of 3 x 4 = 12 types of elbows.
Fourth, a continuously improving indoor space is essential, especially when selecting fittings. Most people are concerned with the durability of their usage rather than damage. A significant factor lies in its recyclability for repeated use without causing new environmental pollution. For plastic hoses, most can recycle and reuse the scraps. However, for PE-X and its waste or old pipes, they are not recyclable and cannot be dissolved, which has always been a challenging research issue.
Ductile iron pipe production is a detailed process. Ductile iron pipes used for high-pressure fluid transmission, also known as daily welding pipes or commonly referred to as black pipes, are used for conveying gases, oil, heating steam, and other high-pressure fluids on a daily basis. The characteristics of these ductile iron materials are smooth inner walls, lightweight, corrosion resistance, good anti-scaling performance, and low cost. However, they also have several drawbacks, including the following:
The raw material for the aging, thermal expansion and contraction, unsuitable for prolonged exposure to sunlight, poor compressive properties, and easy deformation due to improper construction, which is also characterized by poor flexibility and prone to casting iron pipe wear, is forged from magnesia, calcium, and other alkaline earth metals or rare metals.
Ductile iron pipes are forged using continuous casting and water-cooled centrifugal forging methods, with the latter being a modern technique. Compared to simple cast iron pipes, water-cooled forging not only enhances corrosion resistance but also boasts high strength, excellent toughness, thin walls, lightweight, impact resistance, good bending properties, and ease of installation. It has also been successfully implemented in various applications domestically. In many regions of our country, ductile iron pipes are used for medium and small diameter pipe connections, employing socket or flange type interfaces; ductile iron pipes allow for limited angles with superior seismic resistance and sealing properties.
Ductile iron pipes can be classified based on the wall thickness grade coefficient K or the allowable working pressure C. When classified based on the allowable working pressure C, large sizes up to DN1000, gas pipes should be classified based on the wall thickness grade coefficient K. The specific wall thickness and allowable pressure for self-anchoring joints are provided by the manufacturer.
Flexible interface components are classified according to the allowable working pressure by adding the letter "C" in front of 10 times the PFA (allowable working pressure). For example, if the PFA is 4 MPa, the pressure class is 0.
