Stainless Steel Pipe Type

There is a wide range of stainless steel pipe type. Because the technical requirements and applications are different, the production method processes of stainless steel pipes are different as well. At present, there are five methods to deal with the stainless steel pipe type. Now,  we will explain them respectively.

The first method to classify the stainless steel pipes is according to the production mode. Stainless steel pipes can be divided into two main types:seamless stainless tube and welded stainless steel pipe. And

the seamless stainless tube can be divided again in to four smaller types: hot-rolled pipe, hot-rolled pipe, cold drawn pipe and extruded tube. And the welded stainless steel pipe can be also divided into two smaller types: longitudinal welded pipe and helical weld pipe. The second method to deal with the stainless steel pipe type is to classify the stainless steel pipes depending on the sectional form.

According to the sectional form, the stainless steel can be divided into circular pipe and special section pipe. It is easy to understand the meaning of circular pipe, but not easy to make sense with the concept of special section pipe. Just as its name implies, special section pipe means rectangular pipe, diamond shape pipe, oval pipe, six-point pipe, eight-point pipe and other asymmetric pipes. The third method to deal with the stainless steel pipe type is to classify the stainless steel pipes depending on texture. According to different texture, stainless steel pipes can be divided into: common carbon steel pipe, high quality carbon steel pipe, alloy structure pipe,alloy steel pipe, and so on.

The forth method to deal with the stainless steel pipe type is to classify the stainless steel pipes according to the shape of pipe end. In this way, stainless steel pipes can be divided into: smooth pipe and deformed steel pipe. Deformed steel pipe can be further divided into common deformed steel pipe and special deformed steel pipe. The former is usually used to convey water or coal gas, and the later is commonly used in geological drilling. The fifth method to deal with the stainless steel pipe type is to classify the stainless steel pipes according to the usage. Classified by use, the stainless steel pipes can be divided into oil well pipe, pipeline pipe, boiler pipe, mechanical structure pipe, chemical engineering pipe, and so on.

Manufacturing Process for Stainless Steel Pipe and Tube

Tube mill Process description of stainless steel pipe and tube:

Rolling and welding

Firstly, the stainless steel strips are made to go through various quality checks and are trimmed at edges. The strips pass through the number of rollers as per the required size. In the tubes-mill, the strip is gradually converted into the tubular shape. The fitted welding machine is then used to weld trim edges of the strip using TIG welding process. The scraps and inside weld bead are removed instantaneously by the Tibo machine. In this way, rolled pipes and tubes are formed.

The cleaning and heating phase

The rolled stainless steel pipes thus manufactured are cut to the required lengths depending upon the industrial demand. These stainless pipes and tubes are then subjected to cleaning to remove the dirt. Further, a heat treatment is given to these rolled pipes and tubes to remove the stresses that may occur due to welding and formation processes. Heat treatment is given on the continuously rolling hearth furnace. The furnace is fitted with temperature recorders and controllers. After the heat treatment process, the SS tubes and pipes are straightened and subjected to pickling for removing scales from the surface.

Cold- drawing process

In some cases, the required size may not be obtained from the mill directly. Then, the cold operation process can be used to obtain the desired size. In cold drawing process, the tubes or pipes are coated with oxalic and soap solution. This solution acts as a lubricant to reduce friction while cold drawing operation. In the cold drawing process, the tube or pipe is drawn over the bench using Die plugs.

Finishing process

The drawn-out tube subjected to cleaning, heat treatment, pickling and straightening. The computerized ink jet marking machine is used to do the marking on the finished pipes or tubes. The pipe or tube is marked with grade of material, size, heat number and the stamp of third party inspection before passing on to stainless steel pipe exporters. The stainless tubes or pipes thus produced will undergo certain testing and quality checks. This process is followed by proper packing and dispatch. There are numerous numbers of stainless steel pipe applications, these pipes and tubes are used there after use.

Factors Affecting Rust of Stainless Steel Pipe Elbow

Stainless steel pipe elbow has excellent corrosion resistance, stainless steel surface thin and strong oxide film so that all stainless steel in all water quality has excellent corrosion resistance, even buried also has excellent corrosion resistance. So it is suitable for a variety of water quality, in addition to disinfection and sterilization, do not need to control the water quality, at the same time, there is no corrosion and excessive exudate, to maintain clean water quality, to prevent secondary pollution, can withstand up to 30 meters per second the impact of high water flow.

Many people think that stainless steel material is of course not rusty steel, it is true. Stainless steel pipe elbow rust mechanism is the formation of dense alloy oxide film, isolated oxygen contact to prevent the continuation of oxidation. So stainless steel is not "stainless". Stainless steel has the ability to resist atmospheric oxidation --- that is, stainless steel, but also in the acid, alkali, salt medium is the ability to corrosion - that is, corrosion resistance. Following the Prime Steel pipe to understand the impact of stainless steel under the main factors of rust it.

1. The content of alloying elements. In general, the content of chromium in 10.5% steel is not easy to rust. The higher the content of chromium and nickel, the better the corrosion resistance, such as 304 material nickel content of 8-10%, chromium content of 18-20%, such a 304 stainless steel angle in general is not rusty .

2. The manufacturing enterprises of the smelting process will also affect the corrosion resistance of stainless steel. Smelting technology is good, advanced equipment, advanced technology of large 304 stainless steel angle steel plant Whether in the control of alloying elements, impurities removal, billet cooling temperature control can be guaranteed, so the product quality is stable and reliable, inherent quality is good, rust. On the contrary, some small steel plant equipment behind, backward technology, smelting process, impurities can not be removed, the production of products will inevitably rust.

3. The use of environmental chloride ions. Chloride is widely present, such as salt, sweat, sea water, sea breeze, soil and so on. Stainless steel in the presence of chloride ions in the environment, corrosion quickly, even more than ordinary low carbon steel. So the use of stainless steel elbow pipe fittings are required, but also need to always wipe, remove the dust, keep clean and dry.

4. The external environment, the climate is dry and ventilated environment is not easy to rust. And the air humidity, continuous rainy weather, or air containing high degree of acidification of the environment is easy to rust. 304 stainless steel angle steel stainless steel, if the surrounding environment is too bad will be rusty.

In addition, the stainless steel pipe elbow has a rust point, indicating that the elbow is not purely stainless steel material is made, is the type of stainless steel elbow. Rust point can be polished with ultra-fine sandpaper bright colorless paint to do after the anti-rust treatment can be used. If you do not deal with rust point, these rust points will gradually expand, affect the appearance and will shorten the elbow life.

UAE Clients visit for Stainless Steel Pipe and Fittings

Warmly welcome our UAE clients visit our company for our future cooperation. 

Shinestar Holdings Group has the ability to offer you stainless steel pipes and fittings. We are specialized in offering combined project solution for stainless steel pipes and fittings. Stainless steel pipe is an important product in the steel industry, and it is widely applied in the national economy. Such as widely used in hot and cold water transmission, drinking water supplying, heating equipment, air conditioning facilities, fire protection, gas and other civil low pressure liquid, petroleum, chemicals pharmaceuticals, beverages transportation. Because the stainless steel tube / stainless steel pipe is a hollow cross-section, it is suitable for liquids, gases and solids pipelines. Compared with other type of steel pipe, stainless steel pipe has largebending torsional strength, so it has become an important material for mechanical and architectural structures. 304 stainless steel pipe is widely used in curtain wall, side walls, roof and other construction purposes. In certain atmosphere, 316 stainless steel pipe is better. Stainless Steel Pipe and Stainless Steel Tube is safe and reliable, simple and convenient pipeline, it has more irreplaceable advantages. 

304 Stainless Steel Pipes and Tube USE:

A269 : Seamless and Welded Austenitic Stainless Steel Tubing for General Service

A312 : Seamless,Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes

A213 : Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-exchanger tubes

304 Stainless Steel Pipes and Tube Weight Count:(Just for 304) 

Weight(Kg/M)=(D-S)*S*0.02490

D:Outside Diameter S:Wall-Thickness

304 Stainless Steel Pipes Chemical Requirements C max Mn max P max S max Si Cr Ni Mo N 304 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 ... ... 304L 0.035 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 ... ... 304H 0.04-0.10 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 ... ... 304N 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 ... 0.10-0.16 304LN 0.035 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 ... 0.10-0.16

304 Stainless Steel Pipe Mechanical Test Tensile(Mpa) Yeild(Mpa) Elongation(%) Hardness 304 515 205 35 90HRB 304L 485 170 35 90HRB 304H 515 205 35 90HRB 304N 550 240 35 90HRB 304LN 515 205 35 90HRB

Packing:Delivery Condition : 

As different requirements,It including bright annealing,pickling,etc.

1.Standard Packing
2.Woodbox Packing

Other Test: 
1.Hydrostatic or Nondestructive Electric Test
2.Marking
3.Grain Size,etc