SSAW Pipe

　　Thick-walled uneven of seamless steel pipe 　　1, During the perforation of seamless steel tubes extending coefficient is too large, roll speed is too high, rolling stable. 　　2, Throwing punch steel capillary instability could easily lead to the tail of uneven thickness. 　　3, Seamless steel tube tip cut slope, bend through the large, tube-centering holes errors could easily lead to uneven thickness of the head pipe. 　　Thick-walled seamless steel pipe uneven Cause Action 　　1, Note the use of state guide disc and increase the guide disc bolt inspection efforts to reduce lead plate when rolling seamless steel pipe ran amplitude ensure stable cast steel. 　　2, Check the quality of seamless steel tube to prevent the tube tip cut slope, large reduction, replacement or repair should be corrected pass the centering holes.

　　There are lots of classifications when talked about ASTM steel pipe. And even for ASTM steel pipe, there are ranges for types of grades, for example, seamless steel pipe or ERW steel pipe for ASTM A 53? Today, we can have a detailed information for them. 　　ASTM A53 LSAW steel pipe can be made with two categories: ERW steel pipe and seamless steel pipe with types of F, E, S covering grades of A and B. 　　 Details are here: 　　ASTM A53 type F, it would be welded on furnace butt with continuous weld Grade A. 　　ASTM A53 type E, it’s a kind of ERW steel pipe in Grade A and Grade B. 　　ASTM A53 type S, this would be made seamless steel pipe in Grade A and Grade B. 　　It would be identified with the raw steel material with different production process for the different grades. Manufacturers of steel pipes would know this clearly. 　　 http://www.xysteelpipe.com/info/ASTM-A53-LSAW-steel-pipe-type-and-grade-1109-1.htm

　　Seamless stainless steel pipes treatment technology refers to the processing of achieving uniform silver with metallic luster. This is generally referred to the production of large seamless stainless steel pipes. Because large seamless stainless steel pipes is manufactured through stamping, folding and welding process, the surface of workpiece has oil, rust, macular, which is neither beautiful, and easy to rust, reducing its stainless steel quality and value. 　　To make seamless stainless steel pipes achieve the standard, the surface must be finished. After forming matte treatment, that can achieve beautiful appearance, but also improve its anti-corrosion and anti-discoloration performance. After the above method, the corrosion resistance of stainless steel seamless pipes can be increased by 2 to 3 times. 　　Seamless stainless steel pipes does not rust due to the existence of chromium, nickel components, and then through the matt treatment, not only can eliminate the matrix im...

　　During the construction of natural gas and oil pipeline stations, the installation of valves, meters and flanges should be tapped in the main channel. It is difficult to identify the straight seam position of the base pipe by high-frequency resistance welding. The installation of some lugs is very close to the welding seam. Therefore, it is very necessary to deeply study and analyze the influence of the boss on the basic pipeline. In this paper, the residual stress distribution of high frequency longitudinal resistance welded pipe is analyzed, and the influence of welding position of different boss on residual stress is analyzed. The stress increases sharply and the longitudinal welding residual stress is affected when the boss installed on the ERW pipe is much larger than the parent pipe. 　　ERW pipeline 　　The distribution of residual stress in welded pipe is closely related to the forming process. HFW resistance welding is the cross section of a circular tube after rolling, whic...

　　In the process of loading and unloading, spiral steel pipe damage is inevitable, and some measures and methods need to be taken to ensure this situation. The details are as follows: 　　1. Spiral steel tube packing should be able to avoid loose and damaged during normal handling, transportation and storage. 　　2. If the demand side has special requirements for the packing materials and packaging methods of spiral steel pipes, it shall be specified in the contract; if not specified, the packaging materials and packaging methods are provided by the supplier. 　　3, Packaging materials should comply with the relevant provisions. If no packaging material is required, it should meet the intended use, avoid waste and cause environmental pollution. 　　4. If the customer requests that the spiral steel pipe cannot be damaged by bumps on the exterior, consider using a protective device between the spiral steel pipes. Protective equipment can use rubber, straw rope, fiber cloth, plastic, caps...

　　Alloy steels are what they sound like: Steels that include specified amounts of alloying elements. Generally, alloying elements make steels stronger and more resistant to impact or stress. While the most common alloying elements include nickel, chromium, molybdenum, manganese, silicon and copper, many others are used in the production of steel. 　　There are countless combinations of alloys and concentrations in use in industry, with each combination designed to achieve specific qualities. 　　High-alloy types of steel are favored in the piping industry for service in extreme conditions, whether it be in hot or cold conditions or subject to rough use. That’s because the combination of chemistry and proper heat treating can yield strong yet ductile pipe that can take a beating. The oil & gas and power generation industries often favor alloy pipe due to its toughness. 　　Alloying elements also impart increased corrosion resistance to steel pipe. That makes it a leading choice for ...

　　Carbon steel pipe is most commonly used in critical engineering applications. It may also be used in automotive applications or structural applications as well. Carbon steel piping is important in applications from oil and gas to control lines or electrical lines. Depending on the job at hand determine whether you are in need of seamless carbon steel pipe or welded carbon steel pipe. 　　Welded carbon steel piping is formed from an originally flat piece of carbon steel. The piece of carbon steel is rolled and welded creating a welded seam going long ways down your piece of carbon steel tubing or piping. The weld is formed by using a high energy source to melt the local metal together. Thus creating a weld bead when squeezed together. You will notices where the welded seam is the weld bead. This will be raised compared to the rest of the carbon steel pipe. You will find that some seams are manipulated to become more flush with the piping, while others are sold “as-weld” meaning they a...

　　Straightening machine is metal profiles, bars, tubes, wire, etc. straightening equipment. Straightening roll straightening machine by pressing on the bars and so it changes straightness. Usually there are two rows of straightening rollers, varying amounts. There are also two roll straightener, relying on two roll angle (intermediate concave hyperbolic rolls) material changes in different diameters straightening. The main types of pressure straightening machine, balancing roller straightening machine, shoe roll straightening, rotating anti-leveler and so on. 　　Straightening machine on which princple 　　Roller position with the movement direction an angle straightening products, two or three large active pressure roller, driven by a motor for rotation in the same direction, on the other side of a number of small rolls are driven pressure rollers which It is relying on the rotating rod or tube to be rotated by the frictional force. In order to achieve compression roller products requ...

　　Hot extrusion billet of seamless steel pipe can be forged billet, rolled billet, slab, billet centrifugal casting and so on. Short or long blank blank in the machine shop after peeling, sawing, drilling deep holes, after turning face and chamfering into the extrusion line. 　　Processed through the blank into the first washing machine for degreasing treatment before the annular heating furnace, and then into the annular heating furnace. Generally annular blank in a furnace heated to less than 900 ℃. But it can be heated directly to the hot steel extrusion temperature (for reaming without direct extrusion billet) according to process requirements. Then go to the vertical induction furnace for heating the material to the hot extrusion temperature. 　　After heating the blank in a good dusting the outer bench painted a good glass frit, by the robot into the blank punch (expanded) in the cylinder bore, the glass powder is added after the blank ends of the "bell". Then, in legi...

　　The total zinc coating condition applied depends mainly on the mass and thickness of the galvanized steel tubing. Usually the surface of the galvanized layer should be complete and uniform and with a standard thickness. The evaluation of the appearance quality of the galvanized layer is very important. The following listed the common surface conditions of the galvanizing layer for galvanized steel pipe. 　 　1. Gray and dark-gray cobwebbing 　　The chemical elements of the steel tube such as C, Si, P and Mn will cause Fe-Zn alloy reaction with the increase of the content, produced zinc-iron alloy layer on the coating surface, especially with Si increased, which accelerate the reaction of iron-zinc melt mutually, formed on the surface of gray even the black net. The black coating layer is thicker than the bright coating, the corrosion protection and prevention ability completely inferior to the bright coating, but will be more resistant to corrosion but may not pretty sensually. Hot-d...

　　The API 5CT standard covers seamless and welded casing and tubing pipes for oil and gas transportation. Casing pipes are available in the following materials: H-40, J-55, K-55, N-80, L-80, C-90,T-95 ,P-110, Q-125. 　　Depending on the different condition and depth of the well, we use the different steel grades. The casing is required anti-corrosion under the corrosive environment. In the case of complex geological conditions, the casing has to be resistant to collapse. Most casing steel grades have the same chemical composition. What makes grade different is the heat treatment applied. Casing grades mainly differ in their yield strength, tensile strength, and hardness. 　　According to API 5CT, there are four groups of products to API SPEC 5CT is applicable include the following grades of pipe: 　　Group 1: Grades H, J, K,M, N and R; 　　Group 2: Grades C, L and T; 　　Group 3: Grade P; 　　Group 4: Grade Q. 　　Additional tests required by API 5CT for certain groups of casing make s...

　　A process for producing hot rolled strips with a thickness of 1.2-8 mm on a hot strip mill. The strip width of 600mm is referred to as narrow strip steel; the width of strip steel is more than 600mm. The first strip hot rolling mill was put into operation in the United States in 1905, producing a 200 mm wide strip. 　　The strip hot rolling mill has superior technical and economic indicators and it has developed rapidly. In industrialized countries, before 1950, the output of hot-rolled wide-band steel accounted for about 25% of the total steel output, and it had reached about 50% in the 1970s. The raw material of the hot strip is continuously cast slab or green rolled slab, thickness 130-300mm. 　　After the slab is heated in a heating furnace, it is sent to a rolling mill and rolled into a strip of 1.00-25.4 mm in thickness and rolled into coils. Rolled steel grades are plain carbon steel, low alloy steel, stainless steel and silicon steel. Its main purpose is to make cold-rolled s...

　 　1. Delivery status 　　It refers to the state of final plastic deformation or final heat treatment of the delivered product. The hot-rolled or cold drawn (rolled) state or manufacturing state generally delivered without heat treatment; the heat-treated state after heat treatment delivery, or the normalizing, tempering, solid solution, annealing according to the type of heat treatment status. When ordering, the delivery status must be specified in the contract. 　　Quenching: The process of rapid cooling after heating above the transformation point temperature. Improve the hardness of the material, but reduce the toughness. 　　Normalizing: After heating above the transformation temperature, cool normally (in air). 　　Annealing: After heating to above the transformation point temperature, slowly cool. Eliminates quenching effects, eliminates stress, and homogenizes components. 　　Tempering: After quenching, heat to a certain temperature (below the quenching temperature), keep warm,...

　　As one of the most widely used materials for engineering project, steel can give customers eminent strength, toughness and durability. So does for the ramification of steel pipe from seamless steel pipe to welded steel pipe like galvanized steel pipe, we can see the large usage range nowadays. 　　Steel pipe, with a versatile, cost effective solution for a broad range of applications, has the categories including: 　　Construction and architecture usage: for this, we can have SSAW steel pipe, LSAW steel pipe and even seamless steel pipe for customers. 　　Water/sewer plumbing: generally speaking, we would like to choose SSAW steel pipe, ERW steel pipe for water transportation. 　　Pipeline systems: This depends one the function of the pipeline system. We would adopt seamless steel pipe for the oil and gas, and welded steel pipe for water and so on. 　　Gas and fluid transfer lines: Typically, we would depend on seamless steel pipe most time for the gas and fluid transfer lines. 　　 ...

    (1) Source of evaluation of external coating     Literature states: "steel surface condition is called environment that can coating and soil pipe insulation four weeks, four weeks the tube surface soil conditions are different and therefore the corrosion protection layer of the pipe is an important barrier to prevent soil erosion. " This is the basic starting point of the evaluation outer coating performance.     Joe Leighton British company discussed from two different perspectives pipe coating system: European perspective is to make it able to withstand moisture, prevent corrosion, it is the "barrier" point of view. From this point of view it had a "PE" protective layer method. The North American point of view is to make it possible to oxidation resistance, chemical resistance and resistance to negative release properties to prevent corrosion, which is the "glue" point of view. From this point of view, resulting in a "FBE" law...

    For the ssaw steel pipe , although the result of the tensile test specimens substantially independent of sampling direction, but the test results v Charpy impact specimen was closely related to the sampling direction. When sampling along the rolling direction CVN maximum value when the vertical direction of rolling sample CVN value of the minimum.     The difference between the ssaw and lsaw steel pipe on rupture is that the latter is consistent initiation or expansion maximum driving direction of least resistance (are axially), thus initiation and expansion must be carried along to uranium. But on the contrary, spiral initiation or expansion of the maximum driving direction (to oil) and the path of least resistance (the rolling direction) are inconsistent, so the crack initiation and propagation direction there are two possibilities; one axial vent; two along the rolling direction (ie, spiral weld direction).     The ratio is generally considered t...

    We would hesitate between seamless steel pipe, ERW steel pipe or other welded steel pipes when we need to choose some of them for our engineering projects. Comparative method would be a nice way to decide which kind of steel pipe we need. Today, we cannot miss the three advantage for ERW steel pipe.     Low cost: Cost would be a main consideration for purchasing except the quality elements. And low raw material cost and manufacturing cost would give advantage for it when customers compare it with seamless steel pipe or other welded steel pipe.     High welded seam security: With the development of high technology, there is no doubt that production process of ERW steel pipe has improved a lot. Thus as a result of special welding method of melting, the weld property is better than submerged-arc welded pipes and other seamless steel pipes.     Wide Range: With its range usage, ERW steel pipe can be applied with a wide range from low pressur...

    Higher Pressure Ratings: One of the most striking features of seamless tubing is its ability to withstand higher pressure. Hence a seamless tube is said to be equally stronger around the entire circumference of the pipe. It has 20% higher ASME (American Society of Mechanical Engineers) working pressure in comparison to the conventional welded tubing methods.     In critical applications, the instruments and tubing can sustain pressure above 30,000 psi. This can eventually save time and money, which will also aid in minimizing the maintenance expense and reducing the unplanned downtime. Seamless tubes are designed to sustain a great amount of load when filled with materials or liquid in addition to its own weight.     Uniformity in Shape: Seamless pipes have round cross section as it comes with a continuous extrusion, thus giving them a round cross section and a uniform shape. Also, the seamless tubing has no longitudinal weld seam. The tubes are des...

    High-frequency pipes have many problems.The pipe crack is one of them.We will introduce the problem and its solution to you.     (1) Characteristics     Water penetration crack: crack width < 0.4 mm. The crack has caking traces. Spray with the shape of mist or leak when testing water pressure.     Micro-crack crack: outer surface has visible microgrooves, and the inner surface is in good condition. There is no leakage phenomenon when testing pressure but it is crazed if being crushed or cold bending.     (2) Causes     1) Low welding temperature (insufficient heat output, and fast welding speed).     2) Roller bearing loss or small strip cause insufficient extrusion force.     3) The sixth and seventh piece of guide roller blade are damaged, and crush the strip steel edge.     4) Strip steel edges have inclusions and its state of edge is unstable.     5) Weld reve...