which can make the thick wall coiled pipe as smooth as new for a long time and reduce the external corrosion to it. It can also increase its sealing performance and ensure that there will be no problems when transporting fluid. In addition it has moisture-proof performance, which increases its stable performance and safer use.
In the production process the hot-rolled steel pipe has the characteristics of no raw materials, that is, the mechanical properties of thick wall steel plate. In this way, the steel plate is heated first and then rolled, which softens the steel plate under great conditions, which will not affect the material quality, nor damage the properties such as strength, yield and tensile strength. For the wall thickness that can not be achieved by cold rolled steel pipe, the specification and model of thick wall steel pipe are added.
.The process coat of the coil pipe is made of high-density polyethylene, and can protect the coil from external factors during use. The outer sleeve shall be added with antioxidant, ultraviolet stabilizer and carbon black. The polyethylene outer sleeve is easy to age, such as stored in the open air Place the cover and stack away from high heat source and fire source. After making the coiled pipe, it is forbidden to be exposed to the sun and quench, otherwise the polyethylene outer pipe is easy to crack, affecting the product performance and service life.
Separate & ldquo; Hot coil & rdquo; The word is a noun, which is the abbreviation of hot rolled coil, and the hot coil used here to connect with thick wall steel pipe is a verb, indicating a kind of behavior.
.It is important that the thick wall coiled pipe will not damage the performance of raw materials. The disadvantage of hot roll thick wall rolling pipe is that the treatment time is long Very expensive. Thick wall rolling pipe is widely used: cylinder, hydraulic, bridge, roller, etc.
The distance between the longitudinal joints of two pipes shall be greater than 100 mm. The distance between the outer wall of the branch pipe and the weld shall not be less than 50mm.
Weld size has a great influence on the quality of rolled steel pipe. Weld size mainly includes welding process parameters, welding wire shape and position parameters, flux flow, flux process performance and weld forming.
In the production process, the hot-rolled steel pipe has the characteristics of no raw materials, that is, the mechanical properties of thick wall steel plate. In this way, the steel plate is heated first and then rolled, which softens the steel plate under great conditions, which will not affect the material quality, nor damage the properties such as strength, yield and tensile strength. For the wall thickness that can not be achieved by cold rolled steel pipe, the specification and model of thick wall steel pipe are added.
The steel plate coil is cut into single pieces by air plasma cutting machine.
What is the manganese content of straight seam coiled pipe? The material of straight seam coiled pipe and an appropriate amount of manganese 1 can significantly improve the cold brittleness of straight seam steel pipe steel, increase the yield strength and tensile strength, reduce the plasticity and impact toughness, and do not be too large; 4 manganese has an effect on the removal of harmful element oxygen in steel; 5MN can also be used to synthesize high melting point (about 1600 ℃, which is at high temperature in steel, so it can reduce the harmful effect of sulfur and lead to hot processing of steel. Sulfur cracked & ldquo; Hot crisp & rdquo; The phenomenon has decreased.
Welcome to inquire.Material used for steel plate coil: it is required to be explained by the user.
Finish machining is performed below, and after shot peening, the scales on the inner and outer surfaces of the elbow are removed, and both ends are processed with grooves to facilitate welding.
Electric fusion connection: when the pipe fittings leave the factory, the resistance wire is buried in the pipe fittings to make electric fusion pipe fittings. At the construction site, only the plug of the special welding instrument and the socket of the pipe fittings need to be connected. The inner body of the pipe fittings melts the outer plastic of the pipe fittings and the inner plastic of the pipe fittings to form a reliable connection, the formula can also be simplified as: (top inner diameter + bottom inner diameter) * 1 / 2 * 0.02466 * pipe length = weight inspection of conical special-shaped coil. 16Mn thick wall coil adopts advanced technology. Jbq6xvzt52aj5 Shenzhen thick wall coil has good use characteristics and performance in use and can show important value and role. The specific functions and values of 16Mn thick wall coil are as follows: it can coil suitable quantitative and wide steel strip and Shenzhen thick wall coil into parallel coils with required inner diameter and wall thickness; The roller is driven by active stepless speed regulation with small mandrel deformation, high pressure of Shenzhen thick wall winding pipe, strong winding force of Shenzhen thick wall winding pipe, high power transmission efficiency, good winding strength and flat appearance; With self-locking function, the swing arm can be automatically locked without shaking after angle adjustment; With automatic cutting device, the incision is neat without warping angle, and the cutting length of Shenzhen thick wall coiled pipe is optional and adjustable. To operate by two people. 16Mn thick wall coiled pipe is durable and stable in use. Shenzhen thick wall coiled pipe is easy to operate. According to the safety and health standards, the rolling pipe is committed to producing all kinds of rolling pipes and steel penstocks with circumferential seams and longitudinal rings, and is reformed on the basis of similar specifications and models of traditional rolling equipment. The function of improving the parameters of the rolling and welding steel pipe equipment by 30% fills the gap that the original traditional rolling equipment can not produce. It can produce steel pipes with a diameter of more than 400 and a wall thickness of 8-100mm in Shenzhen. Materials mainly include q23 q34 20#, 16 manganese, 16 manganese capacity, etc. Product executive standard: GB / t50205-200, GB / t3092-2001, etc. The products are widely used in petroleum, chemical industry, natural gas transportation, pile driving and urban water supply, heating, gas supply and other projects. The process of designing brand inspection standard thick wall straight seam coiled pipe is generally rolled. If the diameter required by the customer is particularly large, it is difficult for Shenzhen thick wall coiled pipe like machinery and equipment. Shenzhen thick wall coiled pipe needs to be rolled. After the steel plate is rolled, Shenzhen thick wall coiled pipe will weld two rolled steel pipes The weld formed by Shenzhen thick wall coiled pipe is also called t-weld. Sometimes, two steel plates need to be rolled and welded for thick wall straight seam steel. D7z3xjb87v21w, so two welds may appear in one pipe body, also known as double welds. Thick wall straight seam coiled pipe has a wide range of materials. As long as it is a steel plate that can be ordered in a steel plant, X ahzpdqsqu7 is basically OK. The main problem of the product is the welding quality. The welding quality directly determines the quality of the product. Shenzhen thick wall rolling pipe is the main step in thick wall rolling pipe. Suitable for buildings, bridges, dams
Quality risk.Gas and other projects.
The automation and mechanization level of large-diameter steel coil is not high, which requires a lot of manual treatment. The main problem of large-diameter coiled pipe is welding. As long as the flaw detection can be carried out, the delivery can be carried out. The relevant requirements are broader than other products.
Since the groove sizes of longitudinal and circumferential joints of hot-rolled pipes are different, it is necessary to confirm whether the inner side is upward before plate rolling to ensure the correctness of groove direction.
.It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.
The rolling pipe factory mainly produces steel plate rolling pipe and thick wall rolling pipe. With the development of domestic economic situation and the acceleration of welding and casting trend, the advantage of NC cutting is gradually recognized. NC cutting not only greatly improves the rate of plate and product quality, but also improves the working environment and labor efficiency. At present, the CNC cutting machines used in the thick wall rolling pipe processing industry are mainly flame and ordinary plasma cutting machines, but pure flame cutting can not meet the needs of modern production, At present, most CNC cutting machines are CNC plasma cutting machines. This type of cutting machine can meet the needs of thick wall coiled pipe plate processing and thick wall coiled pipe parts processing, so the demand will be greater and greater, but there is still a very obvious gap with foreign countries, mainly in
Pipe groove processing and joint pair: when the pipe wall thickness is less than 6mm it is type I weld; when the pipe wall thickness is greater than 6mm, it is type V weld; For pipes with diameter greater than 600mm and wall thickness greater than 6mm, the bottom of the pipe shall be sealed at the bottom of the pipe; In addition to the lap joint, the other type of gas coil pipe is continuous and solid V-groove butt welding. If the weld is found to be defective, the weld must be re welded. Rewelding shall not be more than twice. The longitudinal weld of coiled pipe in the same cylindrical part shall not be greater than, and the spacing between two longitudinal joints shall not be less than 200mm.