Changsha Xiangjia Metal Materical Co., Ltd.

The strength of   SSAW pipe   is higher than LSAW pipe, which can produce welded pipes with larger diameters from narrower billets, also it can use billets of the same width to produce welded pipes with different diameters. However, compared with the same length of LSAW pipe, the seam length of the SSAW pipe is increased by 30~100%, so the produce speed is low. Therefore, most of the welded pipes with smaller diameters use straight seam welding, and most of the welded pipes with large diameters use spiral welding. SSAW pipe is divided into two types: automatic submerged arc welded steel pipe and high frequency welded steel pipe. 1. Spiral seam automatic submerged arc welded steel pipes are divided into two categories: A-type pipes and B-type pipes according to the pressure of the conveying medium. Type A pipes are welded with ordinary carbon steel Q235, Q235F and ordinary low-alloy structural steel 16Mn. Type B pipes are welded with steel Q235, Q235F, Q195, etc., and are used ...

The material of   SSAW steel pipe   is Q235 A, Q235B, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, 16Mn, 20#, Q345, L245, L290, 40#, 60#, X42, X46, X70 , X80. Different usages of SSAW steel pipe, the raw materials is different. For example: the material required for SSAW steel pipe used for piling is Q235B SSAW steel pipe used for water pipeline, the material should be Q235B SSAW steel pipe that used in oil and gas industry, the material is Q235B and Q345B.

1. Check the hoisting tools of crane before loading  SSAW steel pipe . If it is a hook hoisting, select a special U-shaped hook to avoid damaging the nozzle and anti-corrosion layer. 2. Using rope to control the balance of SSAW pipe in the process of loading, to avoid the swaying of the pipe body and the collision and damage to the pipe. 3. Strengthen the management of SSAW pipe loading and unloading. Loading and unloading the pipe whould be command by a special person,  to prohibited to prying, rolling, sliding and other ways to damage the anti-corrosion layer of pipe. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products...

1. Under the premise of stable stacking and safety, stacking according to varieties and specifications should be achieved. Different types of materials should be stacked separately to prevent muddling and mutual erosion;  　　 2. It is forbidden to store items that are corrosive to steel around the  ssaw steel pipe  stack;  　　 3. The bottom of the ssaw steel pipe should be high, firm and flat to prevent the material from being damp or deformed;  　　 4. The same materials are stacked separately according to the storage order;  　 Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.

  1.         Marking with oil: Qualified  SSAW steel pipes  are coated with oil to prevent corrosion and marked according to user requirements. 2.         Leveling and milling: the original SSAW steel pipe is leveled by the anvil, and the two edges of the SSAW steel pipe are milled on both sides by the milling machine to achieve the required plate width, parallelism and slope of the plate edge. 　　 3.         Shearing forming: The SSAW steel pipe is spirally crimped along the outer edge into a tube on the production line.  　　 4.         Butt welding cutting: using advanced double-sided submerged arc welding technology for pre-welding, internal welding and external welding. The SSAW steel pipe is cut to a standard length using a plasma ruler.  　　 5.         Visual inspection: some basic param...

  1.         Small and medium-sized steel bars, wire rods, steel bars, medium-diameter steel pipes, steel wires and wire ropes, etc., can be stored in a well-ventilated material shed, but must be placed on top and under the pad.  　　 2.         Some small steels, thin steel plates, steel strips, silicon steel sheets, small-diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steels, and high-priced, corrosive metal products can be stored in the warehouse.  　　 3.         The site or warehouse for storing spiral steel pipe products should be located in a clean and well-drained place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed on the field, and the steel should be kept clean.  　　 4.         Large section steel, rails, steel plates, large diameter steel p...

 Anticorrosive steel pipes are divided into anticorrosive SSAW steel pipes, anticorrosive LSAW steel pipes and anticorrosive seamless steel pipes according to the type of steel pipes. The common form of anticorrosive steel pipes is 3pe anticorrosion. The domestic implementation of the SY/T0413-2002 standard, the standard mainly regulates polyethylene and high-density polyethylene, and the Vicat softening point is no less than 110℃; the thickness of the outer anti-corrosion layer is determine by Germany Standard DIN30670-1991, which mainly are low-density and medium-density polyethylene. Greatly improve the impact strength of the 3PE anti-corrosion layer. SY/T0413-2002 greatly improved the peeling strength and impact resistance of 3PE anticorrosion layer, and clearly stipulated the carbon black content of some special materials, stipulated the mechanical strength and weather resistance of 3PE anticorrosion layer, and enlarged the joint The peel strength (that is, the peel strength o...

  SSAW steel pipes  have been widely used in water plants, petrochemical, chemical, electric power, agricultural irrigation and urban construction. When choosing the type of SSAW steel pipe, people don't know the thickness of the SSAW steel pipe. Here, we will introduce you the type and thickness of the SSAW steel pipe. 1. Commonly used models of SSAW steel pipe SSAW steel pipe is a kind of spiral steel pipe made of coil, using double wire submerged arc automatic welding extrusion welding. The SSAW steel pipe feeds the steel strip into the welded pipe unit. After multi-roll rolling, the strip is gradually rolled upward to form a round billet with an open gap. Adjust the pressing amount of the squeeze roller to control the welding gap between 1-3 mm and the welding end to be uniform. Common specifications are: outer diameter 219mm, 273mm, 325mm, 377mm, 426mm, 529mm, 630mm, 820mm, 1020mm, 1220mm, 1420mm, 1520mm, 1620mm, 1820mm, 2020mm. 2.What is the common thickness of SSAW stee...

  SSAW steel pipe : It is rolled by low-carbon structural steel or low-alloy structural steel strip at helix angle to form a tube blank, and then welding the tube seam. The specifications are expressed by outer diameter * wall thickness, and the welded pipe shall be ensured that the hydraulic test, the tensile strength of the weld and the cold bending performance must meet the requirements. Advantages of SSAW steel pipe: 1. The same width of strip steel can produce different diameter steel pipes 2. Under the same pressure conditions, the stress of the sprial welded seam is smaller than that of the straight seam, which is 75% to 90% that of the straight seam welded pipe, so it can withstand greater pressure. Compared with the LSAW steel pipe of the same outer diameter, the wall thickness can be reduced by 10% to 25% under the same pressure. 3. The size is accurate, the diameter tolerance does not exceed 0.12%, the deflection is less than 1/2000, and the ovality is less than 1%. Gene...

 Defects that are easy to produce in the welding pipe are pores, hot cracks and undercuts. 1. Bubbles. Bubbles mostly occur in the center of the weld bead. Because hydrogen is hidden in the weld metal in the form of bubbles. Therefore, the measure to eliminate this defect is to remove the rust, oil, moisture and moisture of the welding wire and the weld. Secondly, the flux must be dried well to remove moisture. In addition, it is also very effective to increase the current, reduce the welding speed, and slow down the solidification speed of the molten metal. 2. Sulfur crack (crack caused by sulfur). When welding plates with a strong sulfur segregation zone (especially soft boiling steel), the sulfide in the sulfur segregation zone enters the weld metal to produce cracks. The reason is that the sulfur segregation zone contains low-melting iron sulfide and the presence of hydrogen in steel. Therefore, in order to prevent this, it is effective to use semi-killed steel or killed steel ...

  Large diameter SSAW steel pipe  is a spiral steel pipe with a diameter greater than 1 meter. It is formed by bending steel strip and then welding. Steel pipes are subjected to water pressure, bending, flattening and other experiments. Usually the delivery length is 12 meters, or customized length. In the production of large-diameter SSAW steel pipes, there are many influencing factors cause to misalignment. Steel pipes are degraded due to misalignment excessive tolerance. What is cause to misalignment how to prevent it? Reasons of misalignment for large-diameter SSAW steel pipes: 1. The sickle bend of the steel belt is the main factor causing the misalignment of the steel pipe. In the forming of SSAW steel pipes, the sickle bend of the steel strip changed the forming angle continuously, resulting in the change of the weld gap, resulting in seams, staggered edges or even overlapping edges, which serious affected the quality of steel pipe. Therefore, pay attention to the sickl...

 The following tests are should do before  SSAW steel pipe  leaves the factory: 1. Appearance inspection Appearance inspection is a simple and widely used inspection method. It is an important content of finished product inspection. The main purpose is to find defects on the surface of the welded seam, dimensional deviations and raw material joints.Usually it can be found by eyes and with the help of tools such as template, gauge and magnifying glass. If there are defects on the surface of the weld seam, there may be inside the pipes. The joint should not be more than 1100mm from the pipe end. 2. Physical inspection  Physical inspection methods are methods that use physical phenomena to measure or inspect. For inspection of internal defects of raw materials or workpieces, SSAW steel pipes are subjected to hydraulic testing after forming, and then take non-destructive testing. Non-destructive testing includes ultrasonic testing, radiographic testing, penetrating testi...

 The hardness of  SSAW steel pipe  is the ability of metal materials to resist the indentation of the surface of hard objects. According to the test methods and scope application, hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness and high temperature hardness. There are three commonly used in steel pipes: Brinell, Rockwell and Vickers hardness. Below we will detailed introduce you Brinell hardness. Brinell hardness (HB) Use a steel ball or cemented carbide ball with a certain diameter and press it into the surface of the sample with the specified test force (F). After the specified holding time, remove the test force and measure the indentation diameter (L ) The Brinell hardness value is the quotient obtained by dividing the test force by the indentation spherical surface area. Expressed in HBS (steel ball), the unit is N/mm2 (MPa, and the calculation formula is in the formula: F--test force pressed into the...

  SSAW steel pipe  is a spiral seam steel pipe made of steel strip (hot-rolled coil), extruded and formed by automatic double-wire double-sided submerged arc welding. SSAW steel pipe production process: put the strip steel into the welded pipe unit, and the strip steel is gradually rolled up after being squeezed by multiple rollers to form a round tube blank with an open gap. The extrusion amount of the rollers is adjusted to control the weld gap at 1 ~3mm, and make both ends of the welding joint flush. Double-sided submerged arc welding is performed on the weld. SSAW steel pipes will do lots tests before they leave the factory to test the mechanical properties, mechanical properties, yield strength, withstand pressure and tensile strength etc. of the steel pipe Three-layer polyethylene (3PE) is a high-performance anti-corrosion coating, which is the outer wall of steel pipes. It has excellent anti-corrosion, insulation, smooth, dense, hard coating, strong adhesion, salt and ...

 At present, the material of  SSAW steel pipe  which widely used on the market is Q235B, It is because Q235B material is affordable and its performance is good for many industries, but in some special industries, high-performance materials such as Q345 and L360 are also used. Q235B SSAW steel pipe Material of SSAW steel pipe include: Q235 A, Q235B, 20#, Q345 (16Mn), L245 (B), L290 (X42), L320 (X46), L360 (X52), L390 (X56), L415 (X60), L450(X65), L485(X70), L555(X80), L290NB/MB(X42N/M), L360NB/MB(X52N/M), L390NB/MB(X56N/M), L415NB/MB(X60N/M) , L450MB(X65), L485MB(X70), L555MB(X80). Q235B is composed of Q+number+quality grade symbol+deoxidation method symbol. Its steel number is prefixed with "Q", which represents the yield point of the steel, and the following number represents the value of the yield point in MPa. For example, Q235 represents a carbon structural steel with a yield point (σs) of 235 MPa. Q345 is a kind of steel material. It is a low-alloy steel, "Q" m...

SSAW Pipe  (Spiral Submerged Arc-Welding Pipe), also called HSAW pipe (Helical SAW), welding line shape like a helix. Manufacturing process is rolling the steel strip, to make the rolling direction have an angle with the direction of the pipe center, forming and welding, so the welding seam is in a spiral line. Below we will introduce you the mechanical properties of SSAW steel pipe. The material of spiral steel pipe, the commonly used materials in China are: Q235A, Q235B.Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345 L245 L290 X42 X46 X70 X80 The mechanical properties of SSAW steel pipe is an important indicator to ensure the final performance (mechanical properties), which depends on the chemical composition of the steel pipe and the heat treatment system. Therefore, according to different application requirements, the mechanical properties of the SSAW steel pipe are introduced from the aspects of tensile strength, yield point, and elongation. 1.Yield Point The metal...

The process of the one·step method is: loading and preparation _ unwinding _ initial correction. Multi-roller straightening_shearing, butt welding_trimming (milling edge)-steel strip pre-bending_forming and internal welding_external welding_internal inspection (slag cleaning) Imaging-hydrostatic pressure test_Flat-head chamfering-Ultrasonic detection with ultrasonic probe_X-ray tube end film-X-ray tube body film_Finished product inspection-Weighing and length measurement-Spray standard-crossing warehouse (different production The manufacturer is slightly different). In production, the forming and submerged arc welding processes are carried out simultaneously and completed in one step. The advantages of the one·step method production process of  SSAW steel pipe (1) Strip steel with the same width can produce steel pipes with different diameters. (2) Steel pipes of the same diameter can be produced with strips of different widths. (3) The diameter and wall thickness ratio of the stee...

The inspection of  SSAW steel pipes  shall be carried out by the Technical Quality Supervision Department of the supplier. It is necessary for the supplier to ensure that the delivered SSAW steel pipe conforms to the rules of the corresponding product specifications. Purchasers have right to check and inspect according to the corresponding product specifications. SSAW steel pipes shall be submitted for inspection in batches, and the rules for group approval shall conform to the rules of the corresponding product specifications. The inspection items, sample quantity, sampe locations and experimental methods of SSAW steel pipes shall be in accordance with the rules of the corresponding product specifications. With the approval of the buyer, the spiral welded pipe can be sampled in batches according to the rolling root array. 1. Visual inspection The visual inspection of the SSAW steel pipe is a broad application of abbreviated and inspection methods. It is an important part of p...

The individual quality of  SSAW steel pipe  is large, it should be stacked outdoors, but this will inevitably be exposed to the sun and rain, so the problem of rust has always plagued the storage time and conditions of the SSAW steel pipe. Therefore, it is necessary for us to know the rust prevention of SSAW steel pipe. The first thing is to use steel wire brushes or other things to polish the surface of the steel pipes. The cleaning and preheating of the SSAW steel pipe can remove loose or lifted scale, rust, welding slag and so on. Manual rust removal can reach Sa2 level, and power rust removal can reach Sa3 level. If the steel surface is firmly attached to the iron oxide skin and the rust removal effect is not large, the anchor depth required for anti-corrosion construction cannot be achieved. Pickling uses solvents and emulsions to clean the appearance of SSAW steel pipe for low-pressure fluid transportation to remove oil, grease, dust, lubricants and similar orga...

The inspection of  SSAW steel pipes  shall be carried out by the Technical Quality Supervision Department of the supplier. It is necessary for the supplier to ensure that the delivered SSAW steel pipe conforms to the rules of the corresponding product specifications. Purchasers have right to check and inspect according to the corresponding product specifications. SSAW steel pipes shall be submitted for inspection in batches, and the rules for group approval shall conform to the rules of the corresponding product specifications. The inspection items, sample quantity, sampe locations and experimental methods of SSAW steel pipes shall be in accordance with the rules of the corresponding product specifications. With the approval of the buyer, the spiral welded pipe can be sampled in batches according to the rolling root array. 1. Visual inspection The visual inspection of the SSAW steel pipe is a broad application of abbreviated and inspection methods. It is an important pa...