Some of the diverse applications of Stainless steel seamless pipe

Stainless steel seamless pipes have become very common these days and are offered by almost all steel pipes manufacturers. The benefits such as higher corrosion resistance than carbon steel and conventional stainless steel and light –weightiness make the design and construction compact and light. Stainless steel is composed of copper, chromium, nickel, tungsten, manganese, etc. and is therefore rust resistant. Stainless steel seamless pipes can prove to be a cheaper alternative to the nickel alloys, which are very costly. Steel has higher strength which leads to reduced thicknesses of section and therefore has reduced weight. It also exhibits good weld ability in thick sections and the ability to be welded is more in stainless steel. Resistance to stress corrosion cracking: Austenitic steel is prone to such corrosions. The resistance posed by stainless steel to stress corrosion cracking makes this material fit for purposes like Hot water boilers, brewing tanks and desalination, structure of swimming pools, etc.

Some of the advantages of using steel seamless pipes in the industry

Increased strength leading to saving of weight.
It has  better stress corrosion resistance
Price is lower as compared to other alloys
These pipes can handle a lot of pressure and adverse weather condition.

Section Steel Cooling Bed
Cooling bed play a key role in steel rolling.  After sizing or reducing , the temperature of pipe is generally above 700 °C. It must be cooled to below 150 °C for subsequent finishing process.

 Section Steel Cooling Bed

The Importance of Furnace Repair and Maintenance

Winter shows up fast in Minnesota which is why it is important to make sure that your furnace is in working order well before the temperatures start dipping. If it's October and you haven't had your furnace inspected, chances are you'll be pretty cold until you can get someone to do a furnace repair in Minneapolis. The good news is that, if you take good care of your furnace, you shouldn't have any major breakdowns this winter. In order to make sure your furnace is functioning at its peak capability, you should talk to your local HVAC company about an annual maintenance plan!

Worth the Expense
The first thing to know is that annual furnace "check-ups" are inexpensive. For usually less than $100, you can have an HVAC professional visit your home and expertly care for your furnace. While some people are certainly the DIY types, you should be aware that servicing a furnace without the right tools and training is both hard and dangerous. If you mess up it could cost you and your loved ones their lives. For this reason, opting for a maintenance plan is a great investment. Besides the time and safety issues, buying one of these plans can keep your furnace running for years longer than it would without it. As you can probably guess, $100 is a lot cheaper than the cost of a new furnace.

Expect Safety First
When a technician comes to your home, the first thing you can expect him to do is shut off the power and the gas (or other fuel) to your heater. This is a necessary safety step which, if omitted, can lead to loss of property and life. If that isn't the first thing he or she does, don't be afraid to speak up and ask them just when they intended on doing it. You may also want to rethink your choice in HVAC companies!

Inspecting the Flue
Few people are aware that their furnace comes with its own special chimney called the flue. This large, metal pipe is responsible for directing the carbon monoxide out of your home and into the outside world. The big issue here is whether there is any corrosion or holes. If there are, you have a serious safety issue since the carbon monoxide will leak from the flue into your home, poisoning the air you and your family breathe.

Changing the Filter
There is constant debate about whether you should have a professional change your furnace's air filter. While changing a filter is something that is easy for anyone to do, a professional does a little bit extra while they do that simple job. One of the important things a professional can do while changing the filter is to check the belt that connects to the blower. The blower has a large part to play in the efficiency of your furnace and, if the belt isn't at the right tension, you could be losing money in the form of inefficiency.

Melting Furnace

Continuous Rolling Mill for Rebar

Continuous rolling mill for rebar
Rolling mill is a mill or factory where ingots of heated metal are passed between rollers to produce sheets or bars of a required cross section and form.

Steel rolling procedure:
Waste steel ----melting---- casting----mold unloading----sorting-----deliver to heating furnace----heating to 1150 degree to 1200 degree----- come out furnace----- rolling----- finished product ----packing---sales                                                                        
Business scope:
We are rolling mills and continuous casting machine manufacturer in China, which the final products are round steel, deformed steel and wire rod. There will be good cooperation chance If you

- Have the raw material of billet or steel scraps
- Want to build a steel factory
- Don't know how to process or design the production line
- Want to add the production line
- Want to purchase the accessories
- Want to reduce the invest budgets since the high cost from European countries and long term RIO period

Continuous Rolling Mill for Rebar

General Knowledge of Seamless Steel Pipe

Seamless steel pipe is a long steel with hollow sections and has no joints surrounding the steel bar. It is mainly used as a pipeline to transfer the fluid, such as oil,natural gas,water and some solid materials,etc. As compared to the flexural torsional strength in the same light, it is an economic cross-section steel. The seamless steel pipes are widely used in the manufactures  and mechniacal parts,such as the oil pipe, automotive transmission shaft,bicycles aircraft,as well as buliding construction. With steel pipe manufacturing, annular parts can improve the material utilization, simplify the manufacturing process, save material and machining time. For example, the roller bearing rings and the jack sets and so on have been widely made of steel pipes. Cylindrical rube can delivery more fluid since the circle has the largest areas under the same circumference. In addition, the ring cross-section bears internal or external pressure, the force more evenly, so that vast majority of tubular steel pipes are cylindrical rubes . However, the tube also has some limitations, such as in-plane bending conditions, the pipe on the better side, rectangular tube bending strength, and a number of sets of frames, steel-wood furniture on the commonly used square, rectangular tube.


The pressure grade of the pipes:

The parameters of channels characteristics which are determined by the nominal pressure level and wall thickness are called the pressure grade of the pipes.
the determine of the pressure  grades is not only the basis for pipeline design, but also the core of design. It is the basis of the arrangement of pressure pipe, and pressure pipe stress precondition for checking the design. and it is also an important factor which will affect investment and reliability.

The cooling bed equipment is mainly used for naturally slow on-line cooling of rolled steel plate. In the profile production line, cooling bed also has the function of preventing bending, to prevent irregular curve of profiles through the process of natural cooling due to various quality problems.

Application:
mainly used in steel industry, metallurgical industry, rebar production line, round production line, pipe production line, etc.

Steel Cooling Bed Conveyor

What Is Steel Rolling In Metalwork?

There are many different rolling processes in metalwork, all of which bring about different results. From ring rolling and controlled rolling to flat rolling and roll bending, a great wealth of processes can be employed in the industry in the creation of differing products.

But what exactly is rolling? Simply put, it's the process where a stock metal, for example steel, is passed between two rolls whose weight and pressure manipulate the steel's shape and size. Slightly more complicated is the two different styles of rolling, which are described as 'hot rolling' or 'cold rolling'.

Hot rolling is when the steel is rolled above its recrystallisation temperature. Before it is rolled, the steel is warmed to such a temperature that it begins to deform and, during the process, the steel begins to recrystallise after having been manipulated into its new shape and size. Hot rolled steel is used in such construction items as rail road tracks and is a very strong material, though one without much directionality.

Cold rolling is the reverse: the steel is worked when its temperature is below that of its recrystallisation temperature - usually at room temperature in most situations. Cold rolled steel tends to have a better surface finish and has a twenty per cent higher strength following the rolling process. Cold rolled materials are usually a lot smaller than ones created through hot rolling though the end result can have far more directionality than the former type. The steel comes in several forms: full hard, half hard, quarter hard and skin rolled. Each type describes the thickness and pliability of the steel. For example, full hard steel can be bent back on itself to around fifty per cent without any signs of strain on the metal showing, whereas quarter hard is much more pliable and can bend to further extremes.

 Roller Table for Rolling Mill

Hot rolling

From Wikipedia, the free encyclopedia
A coil of hot-rolled steel
See also: Hot working
Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening. The starting material is usually large pieces of metal, like semi-finished casting products, such as slabs, blooms, and billets. If these products came from a continuous casting operation the products are usually fed directly into the rolling mills at the proper temperature. In smaller operations the material starts at room temperature and must be heated. This is done in a gas- or oil-fired soaking pit for larger workpieces and for smaller workpieces induction heating is used. As the material is worked the temperature must be monitored to make sure it remains above the recrystallization temperature. To maintain a safety factor a finishing temperature is defined above the recrystallization temperature; this is usually 50 to 100 °C (90 to 180 °F) above the recrystallization temperature. If the temperature does drop below this temperature the material must be re-heated before more hot rolling.

Hot rolled metals generally have little directionality in their mechanical properties and deformation induced residual stresses. However, in certain instances non-metallic inclusions will impart some directionality and workpieces less than 20 mm (0.79 in) thick often have some directional properties. Also, non-uniform cooling will induce a lot of residual stresses, which usually occurs in shapes that have a non-uniform cross-section, such as I-beams. While the finished product is of good quality, the surface is covered in mill scale, which is an oxide that forms at high temperatures. It is usually removed via pickling or the smooth clean surface process, which reveals a smooth surface.  Dimensional tolerances are usually 2 to 5% of the overall dimension.

Hot rolled mild steel seems to have a wider tolerance for amount of included carbon than does cold rolled steel, and is therefore more difficult for a blacksmith to use. Also for similar metals, hot rolled products seem to be less costly than cold-rolled ones.

Hot rolling is used mainly to produce sheet metal or simple cross sections, such as rail tracks. Other typical uses for hot rolled metal includes truck frames, automotive wheels, pipe and tubular, water heaters, agriculture equipment, strappings, stampings, compressor shells, railcar components, wheel rims, metal buildings, railroad hopper cars, doors, shelving, discs, guard rails, automotive clutch plates.

Disk Crop Flying Shear

Rolling (metalworking)

From Wikipedia, the free encyclopedia
"Rolling mill" redirects here. For mills that use rollers to crush grain or stone, see roller mill.

A rolling schematic

Rolling visualization.
In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, and cold rolling processes the most tonnage out of all cold working processes. Roll stands holding pairs of rolls are grouped together into rolling mills that can quickly process metal, typically steel, into products such as structural steel (I-beams, angle stock, channel stock, and so on), bar stock, and rails. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products.

There are many types of rolling processes, including ring rolling, roll bending, roll forming, profile rolling, and controlled rolling.

Steel Rolling Production Line (turnkey service)