SSAW Pipe

　　Nowadays, with the advancement of seamless steel pipe technology and the increase in demand, there are many types of seamless steel pipes. Everyone feels so confused when they choose. Among them are hot-expanded steel pipes and seamless steel pipes. Today, I will explain to you the differences between the two types of steel pipes. 　　In general, both the hot-expanded steel pipe and the seamless steel pipe have strict requirements on the steel used for the manufacture of the steel pipe. The hot-expanded steel pipe is only a manufacturing process of the steel pipe, and the small-diameter steel pipe is processed into a large-diameter steel pipe. 　　Thermal expansion steel pipe: First of all, in the appearance of the steel pipe, the heat expansion is red, and the inner diameter is lead powder. 　　The steel pipe to be thermally expanded has strict requirements on the quality of steel grades, and it is usually necessary to use a steel pipe having a high shrinkage property and a rough p...

　　The toughness index of steel pipe is the same as the index of strength of steel pipe, and it is the most important mechanical and physical performance index. The toughness index generally demands from three aspects. 　　1, FATT indicators 　　FATT is the abbreviation of Fracture Appearance Transition Temperature, which is usually translated as "ductile-brittle transition temperature". FATT can be divided into three types: one is based on the DWTT test, and the shear temperature (ShearArea) is 80% or 85%, and the temperature is the transition temperature. This method is the most applied, and the shear area is 80. %, the other is based on the Charpy test and the third is based on the blast test. 　　2, Cracking toughness index 　　The length of the defect 2a (or the equivalent crack length) in the steel pipe will gradually increase due to fatigue crack growth, corrosion crack growth and other reasons. When 2a increases to the critical crack length 2ac, the "mass change...

　　The casing pipe coupling is a kind of oilfield drilling tool, which is mainly used for the connection of the oil pipe, and mainly solves the problem that the existing coupling easily generates fatigue fracture due to stress concentration. 　　The tubing coupling structure is: the tubing end is connected to the inner wall of the coupling by a taper thread, and the end of the coupling body and the oil pipe are connected by the same thread with the pitch flat thread. The utility model has the characteristics of alleviating the stress concentration of the root of the external thread of the single taper thread connection tubing, is not easy to produce fatigue fracture, and has good connection effect. Effectively prevent oil well pipe string breakage accidents. 　　The coupling is divided into a tubing coupling and a casing coupling. Commonly used steel grades are J55, K55, N80, L80, P110 and so on. 　　Main buckle type: NU (not thickened), EU (thickened), TBG (not thickened), UP-TBG (thic...

　　1.Providing adequate drainage prevents water hammer completely, for this the necessary safety measures must be taken so that the water (condensate) is drained before it accumulates in a sufficient quantity so that the steam collects it. 　　2.Incorporate documented operating procedures that serve as steps to be followed by plant personnel during the start and stop of the steam system. It is key to train the technical personnel responsible for the plant and the operators in the application of these procedures. 　　3.Improve steam quality, keeping steam as dry as possible at all times. This can be achieved by installing systems to recover condensate upstream in the meters and any other critical component of the steam system. 　　4.Prevent steam speeds from becoming excessive as a result of system modifications. The higher the speed, the greater the impact force during an event driven by steam flow. 　　5.Install a back pressure control valve in the steam pipe to prevent the pressure in...

　　A53 Pipe vs A106 Pipe - (1) Scope 　　ASTM A53 is standard specification for pipe, steel, black and hot-dipped, galvanized-coated, welded and seamless. 　　ASTM A106 is standard specification for seamless carbon steel tube for high temperature service. 　　A53 Pipe vs A106 Pipe - (2) Type of pipe applied 　　A 53 can be welded seam or seamless, depending on how it is specified for purchase. It is a general steel tube specification and covers galvanized pipe as well as black pipe. 　　A106 is a similar tube in the chemical composition, but is intended for high temperature service (up to 750 Degs F). It is a seamless tube. 　　At least in the US, there is usually A53 for the welded tube while A106 is seamless. If you request A53 in the US, you will cite A106 as a substitute. 　　A53 Pipe vs A106 Pipe - (3) Chemical composition 　　For example, when we compare between A106-B and A53-B without problems from the point of view of chemical composition, we find that: 　　1. A106-B contains ...

　　ASTM A179 Condenser and heat exchange tubes of low carbon steel, covering the minimum wall thickness, low cold carbon steel tubes for tubes, heat exchangers, condensers and other transfer services of heat ASTM A 179 seamless steel pipe is supplied and produced by cold drawing. 　　The standard specification of the ASTM A179 (SA 179) standard covers cold drawn seamless steel pipe for tubular heat exchanger, condensers and other similar heat transfer equipment. 　　The ASTM A179 tube covers the OD from 1/8 "to 3", which is 3.2 mm to 76.2 mm. Other diameters and thicknesses smaller than the specified sizes are also applicable to this standard, but the mechanical properties are not applicable for sizes less than 1/8 "and 3.2 mm, or thickness less than 0.015 inches 0.4 mm. 　　Applications: For tubular heat exchangers, condensers and similar heat transfer devices. 　　The chemical composition contains carbon, manganese, phosphorus and sulfur. Required test: hardness test, ...

　　As the saying goes, "shopping around", everyone will go through a lot of comparisons when buying pipes, comparing price, quality, pressure resistance, and corrosion resistance. After comparison, you will find that although the price of seamless steel pipe is higher than ordinary steel pipe, its quality is much better than ordinary steel pipe. 　　Because the seamless steel pipe adopts the hot rolling cold drawing production process, the seamless steel pipe is superior in toughness, compression resistance and twisting strength. Moreover, the seamless steel pipe is subjected to pickling and passivation surface treatment to form a protective film on the surface of the steel pipe, and then acid-washed and then replenished by electrolysis to further protect the seamless steel pipe. Therefore, seamless steel pipes are more resistant to corrosion and oxidation. In addition, our seamless steel pipe is formed by laminating molten steel in a molten state through a ring-shaped slit an...

　　Welded stainless steel pipe applications can include anything from medical equipment to offshore drilling towers. Selecting the right alloy is one of the ways in which you can meet the specific requirements of your application and also guarantee job success. Depending on the elements of the alloy, you can improve the properties of your tube; from improving its ductility, to increasing its resistance to corrosion. Here is a summary of some of the most common alloy elements, including the ways in which their chemicals affect the properties of a tube: 　　Nickel improves the ductility of the alloy 　　Nickel is the backbone of the Incoloy, Inconel and Monel alloy families and is an additive in austenitic stainless steels. By creating a face-centered cubic crystal structure (FCC), nickel increases the ductility of the alloys and constitutes an important component in metals subjected to plastic deformation. In general, austenitic steels will exhibit impressive ductility properties with o...

　　The stainless steel tubes have the most varied functions. So much so that this type of material is widely used in various sectors of industry. Such product is developed and made in the production of various machines, tools and accessories. 　　It is also not uncommon to find it in architectural and design projects, which aim at aesthetic boldness in their buildings. After all, besides being sturdy, stainless steel enables more modern and aseptic looks. 　　Check out the main markets that use stainless steel pipes. 　　1 ) Building and design 　　As mentioned above, stainless steel is widely used in the manufacture of construction objects and accessories. Gates of houses, businesses and apartments are produced with rectangular tubes. The same goes for metal furniture such as tables and chairs. Handrails also use stainless steel pipes in their production, as well as stairs, frames and mezzanines. 　　In sumptuous buildings, it is possible to notice the presence of stainless steel in i...

　　Both of cast iron and cast steel are Fe-C alloys. Due to the different content of carbon, silicon, manganese, phosphorus, sulfur and other chemical elements, they offer different metallographic structure and show many different mechanical properties and castabilities. It is generally considered that carbon content above 2% is cast iron while contains between 0.1–0.5% carbon is as cast steel. Let’s take a look at the difference between steel castings and iron castings according to its classification and applications. 　 　Cast Iron 　　Gray cast iron. High carbon content (2.7% ~ 4.0%). Gray cast iron is the most widely used cast iron containing flake graphite (accounting for more than 80% of the total production of cast iron). Carbon is mainly in the form of flake graphite, grey colored, offers low melting point (1145 ~ 1250℃) and small shrinkage during solidification, close to carbon steel in compressive strength and hardness, good shock absorption, used for manufacturing machine to...