Changsha Xiangjia Metal Materical Co., Ltd.

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 mat

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 steel pi

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 product in

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 organic matte

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 pro

SSAW steel pipe  shall be tested for mechanical properties, flattening and flaring before they leave the factory, and shall meet the requirements stipulated in the standard. The quality inspection methods of SSAW steel pipes are as follows:  1. Visual inspection. The appearance inspection of welded joints is a simple and widely used inspection method, which is an important content of finished product inspection, mainly used to find defects and dimensional deviations on the surface of the weld. Generally, it is inspected by eyes and with the help of tools such as standard templates, gauges and magnifying glasses. If there is a defect on the surface of the weld, there may be a defect inside the weld.  2. Physical Inspection methods: The physical inspection method is measuring or inspecting with some physical phenomena. The inspection of internal defects of materials or workpieces is generally performed by non-destructive testing. Non-destructive testing includes ultrasonic testi

1. In the production process of  ERW steel pipe , how to ensure that the product quality meets the requirements of technical standards and the needs of customers? An analysis of the factors that affect the product quality during the production of steel pipes. According to the statistics of non-conforming products of Φ76mm high-frequency welded steel pipe unit in a certain month, it is believed that the factors that affect the quality of steel pipe products during the production process are raw materials, welding process, roll adjustment, roll material, equipment failure, production environment, and other reasons. aspect. Raw materials accounted for 32 .44%, below will introduce the infect of material to ERW steel pipe. The influence of raw materials on the ERW steel pipes. The factors that affect the quality of raw materials are mainly the three aspects of the unstable mechanical properties of the steel strip, the surface defects of the steel strip and the large deviations in geom

Seamless steel pipe  is a long strip of steel with a hollow section and no welds around it. Mainly used to transport fluids, such as oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, seamless steel pipe is lighter with the same bending and torsional strength. It is an economical cross-section steel. It is widely used in the manufacture of structural parts and mechanical parts. Stainless seamless steel pipes are used to manufacture ring parts, which can improve the material Utilization rate, simplifying the manufacturing process, saving material costs and processing hours, such as rolling bearing rings, jack sleeves, etc., are currently widely used in steel pipe manufacturing. Seamless steel pipe can be divided into round pipes and special-shaped tubes according to the different cross-sectional area shapes. Since the circular area is the largest under the condition of equal perimeter, more fluid can be transported by the c

The hot expanding steel pipe is  hot expanded seamless pipes , which is relatively low density but the contraction of the strong steel pipe (seamless pipe) can be referred to as thermal expansion. A process of skew rolling or drawing method to expand the pipe diameter. Steel pipe thickening in a short period of time, can produce non-standard and special types of seamless tubes with low-cost and high production efficiency, the current international developments in the field of tube rolling. Hot expand pipe is by expanding the diameter of pipe to finish processes - thermal expansion process of the production of steel pipe. Hot expansion pipe are commonly referred to hot expanded seamless steel pipes. So far, the thermal expansion carbon steel pipe production technology is relatively mature, the level of equipment and methods of thermal processing also has made substantial progress. From billet to the basic technological principle is still tube rotary piercing or pressure per

Welded pipe  are usually used for the transportation lower pressure fluids such as water, gas, air, oil and heating steam. Carbon steel wire pipe(GB3640-88) are used to protect electric wires in electrical installation projects such as industrial and civil buildings, installation machinery and equipment. ERW steel pipe  (YB242-63) is a steel pipe with welds parallel to the longitudinal direction of the steel pipe. Usually divided into metric welded pipes, welded thin-walled pipes, transformer cooling oil pipes and so on. SSAW steel pipe  for pressure fluid conveyance (SY5036-83) is a spiral seam steel pipe used for pressure fluid transfer. . The steel pipe has strong pressure bearing capacity and good welding performance. After various strict scientific inspections and tests, it is safe and reliable to use. The diameter of the steel pipe is large, the transmission efficiency is high, and the investment for laying the pipeline can be saved. It is mainly used to transport oi

1. Grinding of  seamless steel pipe  nozzles: Angle grinder should be used to polish the plastic coating at the nozzle after cutting. The purpose is to avoid melting or burning the plastic coating to damage the pipeline during flange welding. Using angle grinder to sand the plastic layer of the nozzle. 2. Plastic coating of seamless steel pipe: After grinding, use oxygen and C2H2 to heat the nozzle on the outside of the pipe. If the internal plastic layer part is melted, the technical worker will apply the prepared plastic powder to the nozzle evenly. It should be noted that it must be applied in every angle, and the flange must be painted above the waterline. This process should strictly control the heating temperature. If the temperature is too high, bubbles will be generated during the coating process. If the temperature is too low, the plastic powder will not melt completely during the coating process. Layer peeling phenomenon, and finally the seamless steel pipe part of the p

Galvanizing can not only beauty the surface of the  seamless steel pipe , but also protect pipe from rusting. The types of galvanizied for seamless steel pipes are hot-dip galvanized and electro-galvanized. Here we will introduce you electro-galvanized. Currently, electro-galvanizied can be classified into four types according to the classification of electroplating solution. 1. Cyanide Galvanized. But cyanide is highly toxic, it has severe damage to the environment. With the promotion of environmental protection concepts, there are many restrictions on the use of cyanide in electroplating zinc. Currently, people mainly use microcyanide electroplating solution instead. After electroplating with cyanide galvanized, the product especially for color plating, and the color remains good after passivation. 2. Zincate Galvanized, it is evolved from cyanide zinc plating. This process has strong corrosion resistance and is good for color galvanizing. With this process, the lattice