Tianjin Xinyue Steel

Manufacturing types and processes of   stainless steel pipe 1. Seamless Hot Rolling Processes Round Pipe Billet → Heating → Perforation → Three Roll Skew Rolling, Continuous Rolling or Extrusion → Off Pipe → Sizing (Or Reducing Diameter)→ Cooling → Billet → Straightening → Water Pressure Test ( Or Flaw Detection) → Marking → Storage 2. Seamless Cold Rolling (Cold drawn) Processes Round Pipe Billet → Heating → Perforation → Head → Annealing → Pickling → Oil (Copper) → Multi Pass Drawing (Cold Rolling) → Billet → Heat Treatment → Straightening → Water Pressure Test → Marking → Storage 3. Longitudinal welding (Straight seam welding) processes Including ERW, EFW. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com Skype/MP/WhatsApp: +8618974849825

The stress on the API 5CT oil casing in the oil well: to ensure that the casing running into the well is continuous, not cracked or deformed, the casing is required to have a certain strength, enough to resist the external force it receives. Therefore, it is necessary to analyze the stress on the inner well casing. 1) Pulling force 2) Extrusion force 3) Internal pressure 4) Bending force In conclusion, the casing in the well mainly bears the first three forces. The stress conditions of the various parts are different, the upper part receives the pulling force, the lower part has the outer pressing force, and the middle part receives less external force. When designing the casing string, the steel grade and wall thickness of the casing are selected based on the above consideration of the safety factor. For the API standard casing, the general safety factor for tensile is 1.6-2.0, the safety factor for impact resistance is 1.00-1.50, generally 1.125, the safety factor for in...

In order to maintain a heat-treated product with stable performance during the rapid heat treatment of induction heating, the following measures should be taken on the production line: (1) The   casing pipe   plant uses continuous heating steel bridging technology to apply bridging technology to improve the phenomenon of low steel temperature and increase the steel product yield. The use of computers to control the head and tail of steel technology; the use of dual-frequency power to control the temperature of the end of the steel pipe; the use of rotating joints to achieve a great advance, etc. to improve the longitudinal temperature uniformity of the steel. (2) Advanced steel conveyors are used to ensure uniform steel speeds, and steel tubes and large-size bars should rotate at a constant speed. The transmission mechanism should use variable frequency drive to improve the stability and reliability of the mechanism. This is one of the important conditions for assuring ...

Welded steel pipe , also known as welded pipe, it is made of steel sheet or strip that experience crimp forming welding. The production technology of welded steel pipe is simple, with high production efficiency, various specifications, less equipment investment, but the general strength is lower than the seamless steel pipe. Since the 1930s, with the rapid development of high quality strip steel rolling production and the progress of welding and inspection technology, the weld quality constantly improves. Welded steel pipe specifications increase day by day, and replace seamless steel pipe in more and more field. In terms of the form of welded steel pipe, it can be divided into the weld seam welded pipe and spiral welded pipe. The billet that welded steel pipe adopted is steel plate or strip steel. Because of the different welding process, welded steel pipe is divided into furnace welded pipe, welded (erw) pipe and automatic arc welding pipe. Due to its different welding form, i...

From manufacturing processes we can know that SAW (LSAW, SSAW) and   ERW pipes   are entirely different right from formation, welding etc. and hence, the performance of both the pipes differ in the following aspects: 1. The surface quality of ERW pipes are better when compared to SAW (LSAW, SSAW) pipes, as they are smooth and have a better finish. In most of the SAW pipes, it is mainly about the weld reinforcement internally and externally. 2. The residual stress ratio in ERW is lower than SAW pipes. As ERW pipe deformation happens more in ERW followed by a sizing of flat oval, it results in elliptical vertical changes and necking, thereby making the stress smaller. The displacement of ERW pipes was smaller when compared along the axial and transverse incisions for comparison with SAW pipes built using the same material and it was also easy to detect. 3. The defects found in ERW pipes are lesser than SAW pipes. As there is a solvent deposit in SAW pipes, it results in...

Dimensions tolerance for API 5L   seamless pipe . 1. For outer diameters less than 2 3/8 in (60.3 mm), pipe body diameter tolerance +/-0.5 mm. Pipe end +/- 0.5 mm; Out of Roundness tolerance for pipe body is 0.9 mm (0.036 in), pipe end 0.6 mm (0.024 mm). 2. For OD equal or above 2 3/8 in (60.3) to 24 in (610 mm), (diameter tolerance) for pipe body is +/- 0.0075D, pipe end +/- 0.005D but max to +/- 1.6 mm (0.063mm); Roundness tolerance for pipe body ≤ 0.015D, pipe end ≤ 0.01D. (In case agreed with manufacturer and client, more strictly tolerances could be applied) 3. For wall thickness Below than 4 mm (0.0157 in), tolerance +0.6 (0.024 mm), -0.5 mm (0.020 in); For API 5L seamless steel pipe thickness in 4 mm to 10 mm (0.394 in), +0.150t, -0.125t; For API seamless pipe thickness 10 mm to 25mm (0.984 in), +/-0.125t; Wall thickness ≥ 25 mm, +3.7mm or +0.1t (if larger) and -3.0 mm (0.120 in) or -0.1t (if larger). t for thickness; 4. For straightness, max for full ...

A106 and A53 the most commonly used   carbon steel pipe   types in industry today, and they’re very similar. But while the differences between A106 and A53 are few, they matter a great deal in terms of when and where each is specified. To ensure you purchase the correct pipe, two things are a must: A basic understanding of seamless and welded seam pipe, and providing detailed specs. If you read the ASTM and ASME standards for A106 and A53 pipe, you’d quickly observe how similar they are in terms of chemical makeup and manufacture. The most important difference is that pipe meeting the A106 standard must be seamless while pipe meeting A53 can either be seamless or welded. Welded seam pipe is made by curling a steel plate into a cylinder and then joining the edges via a weld. Seamless pipe is made by piercing cylindrical bars of steel through the middle while it’s hot, creating the same shape but without a seam. The reason for the difference lies in the suitable applica...

International requirements for the threads of   casing pipe   when a pair of inner and outer cones are fitted to each other, only the allowance of the end face is satisfied, and the axial displacement can be used to complete the interference at the connecting surface. And can be used to improve the processing quality of the connecting area, increase the axial force to add the touch area at the touch area and pressure, and then get more tight ring pressure touch area. The larger the area of the touch area, the less likely the leakage path is, and the more reliable the sealing function is. The thread of casing pipe is a special taper sealing method with thread groove - taper pipe thread seal. When the tapered pipe thread meets, only the face allowance (close distance) is satisfied, and the preload in the sealing surface can be easily obtained by screwing the thread and causing the axial displacement. After reviewing the taper sealing method, when the inner and outer taper...

We use a rigorous quality monitoring system to inspect raw materials and test each product during the production process to ensure that each tube meets the standard requirements and is fully qualified at the factory. Our quality control system mainly includes the following steps: 1. In order to ensure that the original and auxiliary materials used are qualified products, the company evaluates and selects qualified suppliers according to GB/T19001-2000-ISO9001:2000 and API standards. Inspected by the raw material inspector of the Quality Management Department, unqualified raw materials and accessories may not be put into use. 2.   Casing pipe   diameter test: This test is used to detect the straightness of the pipe body and detect whether there is a bump in the pipe wall. 3. Tubing collar size and appearance inspection: QC staff inspects the size and surface of the steel pipe to ensure compliance. 4, Quality inspection is for the finished product testing, quality i...

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...

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...

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...

The effect of roller adjustment on the quality of ERW has a process called roller adjustment when producing   ERW pipes . During the production process, the roller is damaged or worn seriously. It is necessary to replace the unit on the part of the roller, or to produce a certain number of rollers continuously to meet the needs of the replacement of the whole roller. At this point, the roller should be adjusted to achieve excellent steel quality. If the roll adjustment is not good, it is easy to form the change of steel pipe seam, lap welding, edge wave, indentation or scratch on the surface of drum and pipe body, elliptical steel pipe and so on. Therefore, the roll adjustment prompt should be mastered when the roll is replaced. 1, replacing the standard steel pipe is usually the whole volume that needs to be replaced. The way of roller conditioning is to draw a baseline from the inlet to the outlet by adjusting the wire, so that each hole is located on the baseline and the mo...

The straightening method of DSAW tube: One, the DSAW tube is bent in the same direction Reason: Welding normalization is insufficient, the pipe has thermal stress on the welding side, and bent in one direction after cooling. Solutions: 1, adjust the middle roller, properly increase the deflection curve; 2, two straightening; 3, the whole tempering pipe can not be straightened directly. Two. The DSAW tube is unrule bending Reasons: 1. the pressure between the three rollers is not consistent; 2. the straightening roller wears a lot. Solution: check whether the adjustment of the straightening roller is loose, and use the sample rod to straighten the contact line length between the three. Third, the length of the DSAW tube is short The reason is that the angle of the three roller straightening roller is different, and the straightening pressure is larger. Solution: adjust the rolling angle as much as possible and adjust the straightening pressure properly. Four. The ...

Welded pipe is generally divided into straight seam welded pipe and spiral welded pipe two types. Hydrostatic burst strength By the relevant comparison test to verify the   spiral welded pipe   and Longitudinal yield pressure and burst pressure measured and theoretical values ??match, the deviation closer. But whether it is the yield stress or burst pressure, were lower than the Longitudinal spiral welded. Burst test also shows that the rate of deformation ring spiral welded pipe bursting Longitudinal significantly greater than the mouth. Thus confirmed that the spiral welded plastic deformation capability than Longitudinal, blasting mouth generally confined to a pitch, which is the extension of the spiral weld to rip from a strong binding effect due. Strength characteristics When the pressure in the pipe withstand, usually two main stress on the wall, that the radial and axial stress stress δ. Synthetic weld stress δ, where α is the helix angle of the spiral weld...

OCTG is a kind of high-level product made of   steel pipes . For OCTG’s diameter, there are 15 kinds. For OCTG’s steel grade, there are 11 kinds, such as J55, K55, etc. For it’s pipe end treatment, there are also many kinds, such as VAM, TOP VAM, LC, BC, STC, etc. As OCTG is quite a delicate steel pipe, so how much do you know about the testing method s of OCTG? Here we will introduce you some test methods of OCTG: 1. Eddy Current Testing Eddy current testing mainly uses the eddies in the work piece produced by magnet coils to analyze the internal qualities of the work pieces, and to detect the surface and near surface defects of various kinds of conductive materials. 2. Ultrasonic Testing When ultrasonic waves propagate in the tested material, acoustic characteristics of the material and changes of internal structures have a certain influence on the propagation of ultrasonic waves. We can know the changes of material's performance and structure by the influence degree a...

In the first half of May, the average daily output of crude steel in key steel enterprises was 1,943,300 tons. According to data from the China Iron and Steel Association, the average daily output of crude steel for member enterprises in May was 1.9433 million   tons, up by 1.74% from the previous ten-year period. As of the end of the current ten-year period, the stock of steel products of steel enterprises was 13.61 million tons, up by 9.4% from the previous ten-day period. While for Xinyue's stock list, currently, we have some   SMLS ,   LSAW , Hollow section stock. Feel free contact us anytime if you are interested in our stock list. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com Skype/MP/WhatsApp: +8618974849825

According to the instructions of President Xi Jinping and President Trump, the Chinese delegation led by Chairman Xi Jinping’s special envoy and vice-premier Liu He from May 17-18, 2018, and the U.S. Treasury Secretary Mukuchin and Commerce Minister Ross and Trade Representatives of the U.S. delegation on behalf of Litethze and other members made constructive consultations on trade issues. On the 19th, China and the United States issued a joint statement on bilateral economic and trade consultations in Washington. Chairman of the delegation, Xi Jinping, who is on a visit to the United States, a member of the Political Bureau of the CPC Central Committee, a vice   premier of the State Council, and the Chinese leader of the China-America Comprehensive Economic Dialogue, Liu He, received media interviews on the morning of the 19th. He said that the biggest achievement of the Sino-U.S. economic and trade consultations was that the two sides reached a consensus, did not fight ...