SSAW Pipe

    To ensure that the erw steel pipe in the winter welding perfect follow the following steps:     First, increase the welding current welding, slow down the welding speed, the appropriate increase in the cross-sectional area and length of the weld, if necessary, preheat.     Second, not outside the groove on the base metal to start arc, arc extinction to be filled when the pit.     Third, as far as possible not in low temperature conditions for bending, correction and assembly weldments.     Fourth, preheating before welding, welding process to strictly maintain the interlayer temperature should not be lower than the preheating temperature.     Fifth, the use of low hydrogen or ultra-low hydrogen welding materials.     Six, the entire weld should be finished as far as possible to avoid interruption.

    Straight seam steel pipe wall thickness control is a difficult production. At present, the straight seam steel pipe manufacturers to improve the wall thickness in the production of precision uses the methods generally including:     1, Tube heating     Heating to the average to prevent rapid up and down temperature. Each take-off and landing temperature is to maintain a smooth slow, the maximum rise and fall temperature does not exceed 30 ℃.     2, Rolling mill mandrel     Average wall thickness of thick wall tube and solid billet make the probability of mandrel bending deformation significantly reduced, can effectively improve the wall thickness of the precision.     3, The accuracy of mandrel     The outer core of the machining accuracy control in ± 0.1mm, mandrel straightness bias does not exceed 5mm. Welding, the two core rods between the piercing a finishing pin positioning, welding in order to...

    Resistance welding (ERW) is a low-cost, high-efficiency pipeline manufacturing technology, which produces a variety of steel pipe called ERW pipe. ERW welded pipe is made of steel plate or strip after crimping and then welded by high frequency resistance welding. The welded pipe with longitudinal weld has been widely used in oil and natural gas transmission pipeline, oil well casing, coiled tubing and soil (Such as a scaffold).     In recent years, the ERW technology has also been used to produce economical petroleum-grade pipes, partly because of the low cost of ERW technology; on the other hand, the petroleum-made pipes are made of inexpensive carbon steel to reduce pipeline costs. Since the ERW process is a localized heating and pressurizing process, the heat dissipates rapidly along the metal pipe and the crimped steel plate after welding under pressure. The cooling rate can reach the critical cooling rate of the steel. In the ERW pipe, Welding area of its ...

    Tubular steel structure are the best replacements to the conventional ones with their useful and comparatively better properties. It is obvious that due to the profile of the tube section, dead weight is likely to be reduced for many structural members.which derives overall economy.     Merits of tubular structure:     1. For tubular structure, higher strength to weight ratio could result in upto 30% savings in steel.     2. Due to the high torsional rigidity and compressive strength, Tubular sections behave more efficiently than conventional steel section.     3. Ease of maintenance.     4. For dynamic loads tubes have higher frequency of vibration than any other rolled section.     5. Free from sharp edges.     6. Ease of fabrication and erection.     Check www.xysteelpipe.com for more info

    1, The supply of seamless steel pipe compared to other traditional pipe, raw materials lighter, high strength, good tolerance, can withstand high internal pressure, the production of sensitive, and can be used to messy or harsh geological conditions.     2, But the steel pipe in the course of the existence of a large rate of end, the main internal and external corrosion treatment trouble. The main external corrosion of the question is very important, the quality of its external anti-corrosion directly affect its service life. Now the main external steel pipe corrosion: concealed type approach, on the steel pipe are requested to strengthen or special enhanced external corrosion, in some areas to promote cathodic protection. On the concealment type of external corrosion method is usually paint such as petroleum asphalt, epoxy coal tar pitch, which is not easy to cure at low temperatures, and welding in the field when the construction of more questions, originall...

    The main advantages of pipeline transportation can be summarized as follows:     (1) Large volume.     An oil pipeline can continue to complete the delivery task. Depending on the size of its diameter, its annual traffic up to several million tons to tens of millions of tons, or even more than 100 million tons.     (2) Small footprint.     Transport pipelines are often buried underground and occupy very little land; the construction of transport systems proves that the buried part of the pipeline is more than 95% of the total length of the pipeline, so the permanent occupation of the land is very small, 3% of the highway, about 10% of the railway, in the transportation planning system, give priority to pipeline transportation program, for the conservation of land resources, is of great significance.     (3) Pipeline transportation construction period is short and low cost.     A large number of domest...

    You, human beings, my friends are here, so I steel pipes with various categories like seamless steel pipe, ERW steel pipe, spiral welded pipe and so on are here for you. This is me who have life once you accompany with me.     I guide water, oil, gas and other products across the wasteland and protect them from the damage of sunshine and sand. I break the truth of we are serving for human who are our friends to them, then deliver them to wherever they're going, like the master they like, the engineering project they need to go.     ERW steel pipe is a naughty boy and with his surface of Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating with his friends as they think this is the symbol of them and this kind of surface would make them fashion and cool.     ERW steel pipe even said to the radio that If I was anything, I exist as steel pipe because you, my friends need me.     http...

    With the boom of economy, there is no doubt that life standard is higher than old time. However, with the coming of various gorgeous buildings, mansion as well as huge factory. The need for high quality requirement for steel pipe like seamless steel pipe or high quality ERW steel pipe in boiler industry is also urgent too.     Playing a very important role in various types of huge factories of power and chemical industry, boiler has become larger in size and temperature than ever. Of course, with the advanced technology and the standard for buildings, the size, temperature and pressure taking for boiler has to be update in order to chase up the modern step.     Therefore, the steel pipes, whether seamless steel pipe for boiler or gas transportation, ERW steel pipe for water transportation and other steel pipes used in daily life must be a higher quality. As seamless steel pipe manufacturer, it means that we should follow the main trend in advanced t...

    Drinking a carton of milk per day is good for your health. So does for the high quality of steel pipe like the SSAW steel pipe, as this would be good for steady construction and estimate transportation used for water, oil and gas transmission.     With different pipe process, we can divide steel pipes into seamless steel pipe, ERW steel pipe, SSAW steel pipe as well as LSAW steel pipe. And of course, each kind of pipe would have its special technical support so that they could be used in certain environment for the better job.     For SSAW steel pipe, it is a strip volume control when the forward direction and forming a molding pipe center-line angle (adjustable), side molding edge welding. The traits that customers fall in love with it that the same specifications of the strip can be production of a variety of diameters of pipe. Of course, with the steel grade such as API 5L: GR A, GR B, X42,X46, X56, X60,X65,X70, this would be one of the technical...

    Annealing of cold drawn steel: refers to metal material heated to the appropriate temperature, maintained a certain time, and then slowly cooled heat treatment process.Common annealing process: recrystallization annealing, stress annealing, spheroidizing annealing, complete annealing, etc.Annealing: the purpose of the main is to reduce the hardness of metal materials, improve the plasticity, processing and machining and pressure, and reduce the residual stress, improve the organization and composition of the homogenization, or for the heat treatment after ready for the organization, etc.     Quenching of cold drawn steel: refers to heat the steel to the Ac3 or Ac1 point temperature (steel) above a certain temperature, keep a certain amount of time, and then in the appropriate cooling speed, get martensite bainite) (or heat treatment process of the organization.The common quenching processes include salt bath quenching, martensite quenching, bainite austempering...

    There are lots of rules for choosing the steel pipe for practical work. But we should remember that different system would match the different steel pipe for a better life service. We should figure out when do we need the seamless steel pipe, and when do we need galvanized steel pipe and so on...     First of all, compressed air piping systems means that it transports compressed air from air compressors to points of usage. Thus, high pressure taking pipes would be essential like c with wall thickness 0.049” – 2.5” (1.24- 63.5mm) and without any crack in the body.     Secondly, not only for domestic or soft water, it would be cool by using the galvanized steel pipe, ERW steel pipe as well as SSAW steel pipe. We all know that there is less pressure for pressure of water than compressed air. Thus we can get the general galvanized steel pipe for saving money, as well as reasonable layout.     What’s more, no matter which kind of steel pipe y...

    According to news from Chinese Ministry of Finance, China will cancel exports tariff for rebar since Jan 1st, 2018. This is a great news for steel pipe industry.     Per current Chinese raw material price trend, cancel export tariff for rebar won’t cause huge growth of steel products exports in a short time. But as rebar need 15% export tariff before 2018, now cancel rebar’s exports tariff can expand rebar’s market home and abroad.     To promote “ One Belt One Road” policy and the development of Free Trade Area, China will carry out treaty preferential treatments to some countries. Among them, in 2018, China begin a free trade agreement with Georgia. And decrease tariff of exporting to the Association of Southeast Asian Nations, Pakistan, Korea, Iceland, Switzerland, Costa Rica, Peru, Australia, New Zealand free trade agreement. Stick to tariff reduce agreement among China, Singapore and Chile.     As now the tariff cancel policy has be...

    SSAW steel pipe is widely used for low pressure liquid delivery, such as water, gas, and oil; construction and piling.     1. The standard requirements are basically the same geometric dimensions, but please kindly note that thick wall spiral submerged arc welded steel pipes can also endure high pressure steel pipes.     2. Spiral submerged arc welded pipe’s surface treatment inside and outside weld reinforcement.     3. Spiral submerged arc welded pipe allows welding, welding performance and pipe the overall performance is inconsistent, the the patching Department prone to stress corrosion cracking.     4. Spiral submerged arc welded pipe’s residual stress is high. The physical test showed that the same specifications, the same material.     5. Generally speaking, spiral submerged arc welded pipe weld length is 1.4-1.7 times that of steel pipe length.     http://www.xysteelpipe.com/info/Features-of-SS...

    ERW is widely used for low pressure liquid delivery, such as water, gas, and oil. Oil drilling and machinery manufacturing, etc. Today, we’ll talk about features of steel pipes.     1. ERW steel pipe residual stress is lower than other submerged arc welded pipe. ERW pipe deformation in the deformation process more fully, coupled with subsequent sizing flat ellipsoid, vertical ellipsoid change and reducing the residual stress of ERW pipe smaller. The physical test showed that the same specifications, the same material, ERW steel pipe cut along the axis of the axial and transverse incision after displacement is small.     2. ERW steel pipe coating quality is good. Investment ERW production units, processes, and relatively high cost of processing steel pipe. ERW pipe of good quality and long life; ERW pipe surface quality, coating evenly, saving a large number of coating materials, pipe coating and low cost; high geometric dimensional accuracy of ERW p...

    High-frequency welded pipe is now often used as a steel, it is widely used in the machinery industry, which is inseparable from its advantages.     Here are some advantages of HFW steel pipe.     HFW steel pipe, mainly using high-frequency current with skin effect and proximity effect two features, so the edge of the weld current is highly concentrated on the surface, the tube welding edge in a very short period of time the heating to the desired welding temperature and then extruded through the tube to welding synthesis. HFW process has many advantages, the material on the pipe size is very wide. High-frequency welding is not only to improve welding speed and can get a small heat affected zone and weld burn through the good.     As the HFW steel pipe is of good quality, small burr inside and outside, welding speed is high, power dissipation is low, etc., are widely used and promoted. In the welded pipe, the pipe is usually the opposite ...

    According to the data, under dynamic condition, the brittle tendency of material will be increased, and the dynamic fracture toughness K I d is a method to solve the oil casing fracture under high energy impact load. Thus, for those steel pipes applied in oil casing, like the seamless steel pipe, should have a clear category in order to know exactly the function and application places they are.     Generally speaking, casing pipe and tube would have the following models.     Large-sized oil casing would be one of them. We can get it that it has large size according to the name. We all know that seamless steel pipe has the certain diameter when we choose it; however, ERW steel pipe doesn't have this limit. So we can decide the diameter and then figure out the material we need to produce the casing pipe.     ERW casing pipe is another type which is different from seamless steel pipe in material chosen.     Economic type oil cas...

    Remember that her grandparents had told her an interesting thing in her childhood.. Adding the ash would make the concrete stronger and more resistant to corrosion. Now as supplier of ERW steel pipe, finally understands why we need this materials for our daily life usage.     There are so many elements that would damage our pipes, whether plastic or steel one. Under this situation, how could we figure out the corrosion products to protect the general work of our steel pipes? Galvanized would be one of the options and corrosion products adding would be another one.     For example, elements in steel, like gold, are noble metals, meaning that they are resistant to corrosion. However, we cannot afford the cost of gold so we need to find the replacement for the gold. Thus, there are light Chromium in steel pipe, which is a corrosion-resistant material, and is used in stainless steel, paints, dyes and the tanning of leather. Of course, research for the a...

    Discussion of steel pipes’ function is here among supplier’s communication meeting recently. What makes impressive is the low pressure spiral welded pipe transforms into high pressure one due to the advanced technology with time goes on.     Spiral welded pipe, with the name of spiral, we know that this is a kind of steel pipe that has a seam rolling around its entire length in a spiral form.     In the past, because of the manufacture's method, this kind of steel pipe can only be produced for low pressure and structural applications. With the improving of technology, the production of large hot rolled coils of sufficient width and the development of dependable non-destructive testing methods, it is now possible to produce Spiral Weld pipe for high-pressure service. l think this is not the only one steel pipe for changing. As for ERW steel pipe, some customers would say that this kind of steel pipe cannot used for oil or gas transportation due to th...

    Drill Pipe is a tube shaped conduit made of steel that is fitted with specially made threaded ends that are known as joints.     Drill that is fitted with a Pipe provides effective connection to the rig surface equipment or application with the bit and the bottom hole assembly for the purpose of pumping the Drill fluid to the bit. Pipe also helps in connecting the rig surface equipment for raising, rotating as well as lowering the bottom hole bit and assembly. The Drill is hollow and thick walled tubing that is made of steel. Thick wall is a must to endure different kind of temperature and pressure per different working conditions.     Pipe for drilling provides for the drilling of a well bore and is available in a number of sizes. Drill pipes also provide strength and weight and are typically 30 ft to 33 ft long. Drill Pipe is also hollow section in nature as it helps the fluid to pass through the Pipe, down the hole and back up to the annulus. Dri...

    SA 213 standard specification for seamless ferritic andaustenitic alloy-steel boiler, super heater,and heat-exchanger tubes.     1. Chemical analysis of finished products: It shall be analyzed from one billet or one pipeper furnace, and the chemical composition determined accordingly shall meet thespecified requirements.     2. Surface state: Austenitic steel pipe should be washed to removethe scale, when the use of bright annealing, you do not need pickling.     3. Mechanical test and grain size:     (1) Grain size: according to ASME E112 standardtest.     (2) Hardness test: from each batch of two tubes onthe sample to do Brinell or Rockwell hardness test.     (3) Tensile test:Such as each batch of steel pipe≤ 50 root, then take a sample for tensile test; each batch of steel pipe>50, then two steel pipes should take two samples for tensile test.     (4) Flaring test: in each batch of a ...

    LSAW steel pipe diameter in the range between 355.6 ~ 1828.8mm, in exceptional cases even more, the range of wall thickness is from 8 to 60mm. Advanced foreign technology can produce pipe per your requirement.     Industrial production of steel plate or straight seam steel pipe only a few ways, the principle difference is the method of forming steel pipe, steel pipe after forming the follow-up process is basically the same.     Methodological principles of forming the weld depends on the distribution of steel, according to the distribution of the pipes to weld two basic forms: straight seam and spiral seam steel pipe. Corresponding to this, straight seam welded pipe production into the production and the production of spiral seam pipe.     Straight seam and spiral seam steel pipe the most widely used method is submerged arc welding (SAW), its good quality, high productivity, technology is mature and stable.     Currently, str...