Seamless steel pipe exporter

Seamless stainless steel pipes are the preferred choice for high-temperature applications across industries due to their several superior properties. They possess greater strength under loading, exhibit exceptional corrosion resistance, can withstand shocks and vibrations, and offer reliable performance even under the toughest and harsh conditions. Due to these benefits, seamless stainless steel tubes and pipes are used in heating-pipelines, containers, coal-saving devices, super-heaters and repeaters, high press boiler, heat exchanger and condenser tubes, mechanical and structural tubing, among several others. This post discusses the various material grades of stainless steel used for producing these   seamless pipes   and tubes. Grades of Stainless Steel Used in Producing Seamless Tubes and Pipes Steel tubes and pipes used for the high-temperature applications must be of superior quality to resist high temperatures ranging from 400 degree Celsius to 1100 degree Celsiu...

Finishing tube is also called cold rolled precision tube, it is one of the types of seamless steel tube production process. The characteristics of the fine rolling tube: 1. The comprehensive performance of cold rolled precision tube is good, can bear high pressure, cold bending, flaring, flattening not crack, not wrinkled skin, can do all kinds of complex deformation and mechanical processing. 2. The cold rolled precision tube tolerance dimension precision is high, the product accuracy control in the plus or minus 5 mm, inside and outside wall finish good, surface oxide layer. 3. The popularization and application of precision   seamless steel pipe   steel can save and improve processing efficiency and reduce machining process and equipment investment, can save cost and save machining time, greatly improve the production capacity and material utilization, at the same time to improve product quality, reduce the cost. Finishing pipe application: Cold rolled precisio...

Cooling method plays an important role during the production process of   seamless steel pipe . As some defects may happen during the cooling process if we don’t take the rightful plans for it. So we should have a clear understanding for the cooling methods before the production of steel pipe. There are three main categories for cooling method: 1. Fast cooling: this is the cooling method with the process of blowing, spraying and water. We can use fast cooling if we are in need of fast done for the product. Depend on the cold water, we can lower the temperature quickly than air cooling method. 2. Air cooling: according to the literal meaning, we can know the method easily. It is a kind of natural cooling method as we just need to put the steel pipe into the air. To some extent, it is a widely used way to cool steel pipe after hot rolling. 3. Slow cooling: this kind of cooling method is characterized by hot-rolled steel sheets or stacked together so that it cools slowly to...

Steel pipes are ubiquitous and can be found in underground, residential, laboratory, commercial and industrial buildings.The pipes transport fluids including water, natural gas, waste and air. Three manufacturing methods exist to produce steel pipes.   Seamless steel pipes   are produced using an extrusion mold. Welded steel pipes are produced by rolling a sheet of steel into a tube and welding the seam. The seamless steel pipe manufacturing process starts with a solid, round steel billet. This billet is then heated to great temperatures and stretched and pulled over a form until it takes the shape of a hollow tube. Here we will introduce the strength under loads of seamless steel pipe. Seamless steel pipe can sometimes be more expensive than other forms of steel pipe, but it’s also more reliable. This is because it has greater strength under loading. Empty pipe must always support its own weight, but when a pipe is filled with material–or under load–it must also supp...

Generally, the hardness of   seamless steel pipes   has three standards: Rockwell Hardness , Brinell Hardness and Vickers Hardness. 1.Rockwell Hardness Rockwell Hardness is also use indentation to represent the hardness, but Rockwell measures its depth rather than diameter. Rockwell Hardness is widely applied in testing hardness of seamless steel pipes, the standard HRC is the most popular testing method next to Brinell Hardness (HB). Rockwell Hardness can be used to test both extremely soft and hard material which supplements shortcomings of Brinell Hardness. The number of hardness can be read directly from the dial. However, due to slighter indentation, Rockwell Hardness is less accurate than Brinell Hardness. 2. Brinell Hardness Brinell Hardness is the most common standard for seamless steel pipes, generally use diameter of indentation to represent the hardness of material, which is intuitive and simple. However, the standard is not suitable for hard and thin s...

Boiler steel pipes includes medium pressure boiler pipe and high pressure boiler pipe, it is often manufactured in seamless procedures, welded steel pipe is not applicable. It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc. Boiler pipe materials and standards Standards and material for steel pipe is available at carbon, alloy, and stainless steel material. Alloy steel:   ASTM/ASME A/SA 213 T1, T2, T5, T9, T11, T12, T22, T91, T92; ASTM A335 P1, P2, P5, P9, P11, P12, P22, P91, P92 Carbon steel:   ASTM/ASME A/SA 106, ASTM A179, ASTM A192, ASTM/ASME A/SA 210, ASTM A333 Gr 1, 6,7 to Gr 9, Stainless Steel:   ASTM A268, ASTM A213, TP304/L, TP316/L, 310S,309S,317,317L,321,321H, and duplex stainless steel material etc. Common Sizes: OD from 6mm to 1240mm, thickness from 1mm to 50mm Types: Straight boiler pipe, and U boiler steel pipe for tube ...

Small caliber seamless steel tube is one of the important characteristics of seamless steel tube, with various technical advantages and various applications.Small seamless steel tubes with small outside diameter can be called small-diameter seamless steel tubes. Next, it mainly explains how the small-caliber   seamless steel pipe   is used for inspection and inspection. Ultrasonic probes can realize the mutual conversion between electrical energy and sound energy and the physical characteristics of ultrasonic wave propagation in elastic media are the basis of ultrasonic flaw detection principle of steel pipe. The directional transmitted ultrasonic beam encounters defects when it propagates in the tube, causing both wave reflection and wave attenuation. After the signal processing of the flaw detector, such as using the reflection method to detect flaws, the flaw echo signal can be obtained. If the penetration flaw detection method is used, the defect signal can be obtaine...

An important principle is that all steel pipes, whatever their size, are inevitably limited in their coverage. So except   seamless steel pipe , welded steel pipe, galvanized steel pipe, we cannot ignore the necessity of pipe fittings. we can manufacture multifarious pipe fittings from elbows, tees, reducers, flanges, cap to mechanical processing machines of elbows push-type forming. Taking steel elbow for instance, we can see the product details here: Steel Elbow: Material: Carbon Steel, Stainless Steel. Size: 1/2"-124" WT: sch10-sch160 Standard: ANSI, ASME API5L, OCT, DIN and JIS, etc. Packaging Detail: Wooden case or wooden pallets or as customer's request. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

An important principle is that all steel pipes, whatever their size, are inevitably limited in their coverage. So except   seamless steel pipe , welded steel pipe, galvanized steel pipe, we cannot ignore the necessity of pipe fittings. we can manufacture multifarious pipe fittings from elbows, tees, reducers, flanges, cap to mechanical processing machines of elbows push-type forming. Taking steel elbow for instance, we can see the product details here: Steel Elbow: Material: Carbon Steel, Stainless Steel. Size: 1/2"-124" WT: sch10-sch160 Standard: ANSI, ASME API5L, OCT, DIN and JIS, etc. Packaging Detail: Wooden case or wooden pallets or as customer's request.

An important principle is that all steel pipes, whatever their size, are inevitably limited in their coverage. So except   seamless steel pipe , welded steel pipe, galvanized steel pipe, we cannot ignore the necessity of pipe fittings. we can manufacture multifarious pipe fittings from elbows, tees, reducers, flanges, cap to mechanical processing machines of elbows push-type forming. Taking steel elbow for instance, we can see the product details here: Steel Elbow: Material: Carbon Steel, Stainless Steel. Size: 1/2"-124" WT: sch10-sch160 Standard: ANSI, ASME API5L, OCT, DIN and JIS, etc. Packaging Detail: Wooden case or wooden pallets or as customer's request. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

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...

Comparing to other steel grades,   casing pipes   of grades J55, K55 are a popular choice for wells without stringent anti-corrosion or strength requirements. Here, we will introduce you the difference between K55 and J55. Chemical composition and physical properties API grade K55 has the same Chemical composition as grade J55, both of them has the same yield, but its minimum tensile strength is about 26% higher compared to J55. J55 Yield strength: 379-552 MPa (55-80 ksi), Minimum tensile strength: 517 MPa (75 ksi) K55 Yield strength: 379-552 MPa (55-80 ksi), Minimum tensile strength: 665 MPa (95 ksi) Heat treatment (PSL2 and PSL1 are different) API 5CT J55 PSL1 and API 5CT K55 PSL2 is the same (Rolling delivery); PSL2 :J55 and K55 should be normalized or normalized and tempered. If thickened, normalizing or normalizing and tempering should be added after thickening. Impact test (PSL2 and PSL1 are different) Tubing: PSL1, J55 and K55 have no requir...

The delivery condition of   seamless steel tube   is the final plastic deformation or final heat treatment state of the finished product.Hot rolled or cold drawn (rolled) state or manufacturing state, generally not by heat treatment;Heat treatment after heat treatment, or normalizing, tempering, solid solution, annealing, according to the type of heat treatment state. The state of delivery of the seamless steel tube is usually the state of annealing or the original state of the steel, which facilitates subsequent processing. When ordering, the delivery status must be stated in the contract. Weight delivery status: Actual weight - at the time of delivery, the weight of its product is delivered according to the weighing (weighing) weight; Theoretical weight - The weight of the product at the time of delivery is based on the nominal weight of the steel. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

With the development of urbanization, there is no doubt that modern house has replaced the old fashioned one already. And there are new demands for sewage steel pipes in housing project whether you use   seamless steel pipe   or welded steel pipe. Choosing project: Which kind of steel pipe we would like to choose for sewage use? From the aspect of costing, the welded steel pipe like carbon steel pipe would be on the top of list. As we all know, seamless steel pipe is a little bit expensive than other steel pipes. And for function, seamless has limit OD since the production and welded steel pipe has large OD relatively which is better when used in transporting the sewage. Demands for sewage steel pipe: What kind of demand would be applied in sewage steel pipe? Here are some factors we can take a note. Good chemical resistance, good insulation and density, electro chemistry, and preventing stray current corrosion, anti-corrosive bacteria, certain mechanical strength, ...

A pipe end is the description of how the section of pipe ends. Understanding the end of pipe is important when designing a piping system since it would be inappropriate for the designer to specify a threaded connection for a large diameter pipe or to specify a welded end when connecting to a threaded component. Typically used on pipe 3" and smaller, threaded connections are referred to as screwed pipe. With tapered grooves cut into the ends of a run of pipe, screwed pipe and screwed fittings can easily be assembled without welding or other permanent means of attachment. In the United States, the standard pipe thread is National Pipe Thread (NPT). The reason for this is that as NPT connections are assembled, they become increasingly more difficult for the process to leak. The standard taper for NPT pipe is 3/4" for every foot. Threaded fittings have threads that are either male or female. Male threads are cut into the outside of a pipe or fitting, while female threads a...

A. Precision of   seamless steel pipe   outer diameter: it depends on the order (reduction) diameter method, the working condition of the equipment, technological system, etc. Permissible deviation of outside diameter: δ=(D-Di)/Di ×100% D: maximum or minimum mm Di: nominal outer diameter mm B. The wall thickness precision of steel tube: it is related with pipe billet heating quality, process design and adjusting parameters of each deformation process and tool quality and the quality of lubrication and so on. Allowable deviation of wall thickness: ρ=(S-Si)/Si×100% S: maximum or minimum wall thickness on the cross section Si: nominal wall thickness mm C. Ovality of steel pipe: it means the degree of out of round steel tube. D. Length of steel tube: normal length, fixed (multiple) length, length of allowable deviation E. Bending of steel tube: it indicates steel radial degrees: length of per meter steel tube bending, bending of the compete steel tube length F...

Tips for choosing good quality   seamless steel pipes . 1. As for good quality seamless steel pipes, its cross section should be smooth and even. If you see there is burr or uneven cross section, do not pick up these defective seamless steel pipes. 2. You need to know the percent of impurities. Weight the pipes and measure its density. If it is low density, light seamless steel pipes will be poor quality. 3. Check the shape of seamless steel pipes. As for poor quality pipes, you will find oval shape on the side of it. 4. Check trademark. There will be standard trademark and words on seamless steel pipe from good quality seamless steel pipes manufacturers. 5. Check the surface of seamless steel pipes. Bad rolling technology produce rough surface seamless steel pipes. Do not choose poor surface seamless steel pipes. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

a. Oiling and marking: The steel pipe qualified by the hydrostatic testing machine is oiled to prevent corrosion, and marking is performed according to the user's requirements. b. Straightening milling: The original curled steel plate is flattened by an anvil press, and then the two edges of the steel plate are double-faced by a milling machine to achieve the required plate width, plate edge parallelism, and groove shape. c. Shear forming: In the production line, the steel plate is spirally curled into a tube along the outer edge. d. Butt welding: The seamless steel tube equipment market adopts advanced double-sided submerged arc welding technology for pre-welding, internal welding and external welding. The welded steel pipe was cut to a gauge length using a plasma ruler. e. Visual inspection: Professional technicians check some basic parameters. f. Ultrasonic flaw detection: The development of scrap steel will perform 100% inspection of the internal and external wel...

The reasons for the wide effect of seamless steel tubes include the following:  Seamless steel tubes  can be combined with other materials for production, and the production volume is very large. It can be used for the transportation of substances and speed up the circulation of substances, such as pipeline transportation. Because it is stronger than ordinary steel pipes, it can also be used to measure the external pressure of the liquid. It is a very good pressure measurement tool. Not only can be used to measure the water pressure of ordinary water, but also to supply energy for some mechanical products. 1. Structural seamless steel tube. Mainly used for general structure and mechanical structure. 2. Seamless steel tube for conveying fluid. It is mainly used for conveying fluid pipelines in engineering and large-scale equipment. 3. Seamless steel tubes for low and medium pressure boilers. Mainly used for industrial boilers and domestic boilers to transport low and...

Generally, there are two processes of  seamless steel pipe : hot rolling process and cold rolling process. Hot rolled seamless steel pipes will be coated with oil after a rigorous quality control by staff, then followed by several cold experiments and perforation experiments. If the perforation is too large, it needs straightening correction. After straightening correction, then transmitted by the transmitting device to the testing machine for testing experiments. If everything is all right, hot rolled seamless steel pips will be labeled and placed to the warehouse according to their specifications. The process of cold rolled seamless steel pipes is more complicated than hot rolled seamless steel pipes. The pipe must through a three-roll rolling first and then will be sized after extrusion. If there is no cracks, cut it by cutting machine and anneal it by acidic liquid pickling. If there is a lot of bubble during pickling, it means that the seamless steel pipes can not rea...

Small diameter  seamless steel pipe  is used for double-sided submerged arc welding production technology. It product by bending, commissural, internal welding, outside welding, straightening, flat top multi-channel process to achieve the American Petroleum Institute standards. Large diameter thick wall steel pipe used in large multi-steel construction and make the body supporting portion. For example bridge piling, piling seabed, and high-rise building pile. Small diameter seamless pipes refer to the ratio of small diameter and wall thickness of the pipe. The smallest diameter is up to 3mm and the minimum wall thickness to 1mm. Small diameter seamless steel pipe weight formula is [(OD - Wall Thickness) * Thickness] * 0.02466 = kg / m (weight per meter) Small diameter seamless steel pipe materials are including 10#, 20#, 25#, 35#, 45# and16Mn etc. Mainly used for petroleum geology drilling pipe, petrochemical cracking tube, boiler tube, pipe and automotive bearings,...

Firstly, before the selection of 304 stainless steel pipe, you should consider its usage and environment. We often use weld pipe for decoration,  seamless steel pipes  for fluid delivery, sanitary stainless steel pipes for medical or kitchen, thick-walled steel pipes for pressure. 200 series material can be used for indoors and 304 can be used for outdoors. In the alkaline or coastal areas, level over 316 materials are generally used. Secondly, the selection of 304 stainless steel pipes must be standard. From the price analysis, if the 304 stainless steel pipe is lower than 301, then you should carefully identify. It is likely replaced by other materials. Recognize whether the surface has the material words "304", and check the quality certificate from manufacturer. Using acid reagent for test, 304 stainless steel pipes will not change color after 30 seconds but 201 will getting black. If you need to purchase in bulk, you'd better take some samples to the national ...

Steel pipes are ubiquitous and can be found underground and within residential walls, laboratories, and commercial and industrial structures. The pipes transport fluids including water, natural gas, waste and air. Three manufacturing methods exist to produce steel pipes.  Seamless steel pipes   are produced using an extrusion mold. Welded steel pipes are produced by rolling a sheet of steel into a tube and welding the seam. The seamless steel pipe manufacturing process starts with a solid, round steel billet. This billet is then heated to great temperatures and stretched and pulled over a form until it takes the shape of a hollow tube. As other steel pipe suppliers will tell you, there are three great advantages to making a pipe in this way. Increased Pressure Ratings The greatest advantage of seamless steel pipes is their increased ability to withstand pressure. The weakest point in a welded steel pipe is the welded seam. But because a seamless steel pipe has not b...

There is the coming of rainy season in Hunan province with the coming of spring. That means the rain maybe fall in torrents in most of time. Under this situation, as manufacturer of  seamless steel pipe , Tianjin Xinyue Steel Group know we should keep the better work of each kind of steel pipe. For welded steel pipe like SSAW steel pipe used for sewage dealing: we should make sure the smooth all the time as the rain would come more than usual time. There are various impurities in it so that we should clear it. For welded steel pipe or seamless steel pipe used in home for transmission of tap water. We should take an eye on the moist environment. We all know it would be damage because of the moist under the rainy day. So it is necessary to keep it dry if we could. Of course, the elements would be vary when we really want to expand the life of steel pipes. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

Shell fabric’s feeling would be an important reference factor for buyers who need clothes. So does for steel pipe, not matter you are  seamless steel pipe , ERW steel pipe, or SSAW steel pipe. Affected by following factors of the pipe surface roughness: 1: Wear resistance of pipe surface roughness. Generally speaking, the rougher the steel pipe's surface, with the smaller effective contact area among the mating surfaces, there is more pressure, there is more wear here! 2: Roughness stability would be affected by complex nature. For the steel pipe's surface, the rougher, the easier it is to wear. Under this situation, we should make sure the high quality of the steel pipe's roughness. 3: Pipe surface roughness would have impact for gas or liquid erosion. Rough surface is easy to make corrosive gas or liquid penetrate the inner surface of the microscopic metal, causing surface erosion. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteel...

Holoow, billet, slab, billet centrifugal casting can be classified in hot rolled seamless steel pipe. Manufacturer of various steel pipes, would like to have a list for difference of hollow and billet for  seamless steel pipe . Billet: The billet, first processed into the first washing machine, is decreased in front of the ring furnace, and then into the ring furnace. Hollow: Generally speaking, the furnace for ring blanks in a furnace heated to less than 900 degrees. According to the production process demand, we should have direct heated to hot extrusion temperature (not directly extrusion billet), and then for vertical induction furnace. Different production process would have different function on quality of each kind of steel pipe. Clients can choose the rightful one for the engineering project. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com .

Seamless steel pipe has various standards with different production process. Today, we would list a detailed diagram for customers to choose from. Seamless steel pipe  can be made by material of carbon, alloy and so on. Here is the list for them: Alloy / Stainless Steel Pipe: Seamless Pipes：O.D.6-630mm W.T.0.5-100mm L max 24000mm Welded Pipes：O.D.6-300mm W.T0.5-66mm ASTM/ASME：A213/SA213 A249/SA249 A268 A312/SA312 A269 A270 A358 A376 A409 A511 A688 A789 A790 A803 A928 A544 A409 A632 A688 A778 A908 Boiler Steel Pipe: Application: Boiler, Super Heater, Heat Exchanger, Ship Builders, Automotive Industry, Power Generation, Food Industry, Paper Industry, Pharmaceutical Industry, Chemical Industry, Oil and Gas Industry Standard: ASTM A213, ASTM A312, ASTM A269, ASTM A778, ASTM A790, DIN 17456, DIN 17458, GB/T14976, GB/T13296, JIS G3459, JIS G3463, EN 10216-5; GOST 9940; GOST 9941 Out Diameter: 6mm~762mm (NPS:1/8"~30") Wall Thickness:1mm - 50mm Carbon Steel P...

Different types steel pipe would have different function when they produced by manufacture with different production process. For example, SMLS Steel Pipe and   seamless steel pipe   would applicable to the general structure, mechanical structure, water wall panel, super heater, boiler, seamless steel tubes, and to transport liquid, gas, oil etc. So here is a list for the production process points for steel pipe: Visual inspection: First step for original materials produced steel pipe is the professional technicians’ check for some basic parameters, which is in order to guarantee the basic quality of the steel pipe. Ultrasonic flaw detection: We could know the inner trouble for steel pipes through the development of internal and external welds of base metals and the 100% check of welds. X-ray inspection: 100% x-ray from internal and external industrial television inspection image processing system for each kind of steel pipe is to ensure the use of detection sensiti...