Cold Rolling Mill, Roll Assembly, Stainless Steel Pipe

November 19, 2010

Stainless Steel Pipe Cutting

Filed under: Uncategorized — Tags: — cps @ 8:05 am

Stainless steel is a mixture of multiple metal alloys for the purpose of rust resistance. The main ingredient is a mixture of at least 12% chromium. When combined with Oxygen it forms a passive film layer resistant to stains and rust. Stainless steel pipe is composed of a nonferrous metal. This makes the tube difficult to cut and drill with conventional tools. Different pipe grades and thicknesses increase these difficulties. Cutting Stainless steel pipes When stainless pipe cutters contact a stainless tube it hardens thus making it difficult to cut. If the stainless tube over heats while cutting the tube may discolor or possibly distort the pipe. Steps To Cut Stainless Steel Pipe Straight and Burr-Free Conventional, burr-free, straight cuts are accomplished as described below: 1. Cut the stainless steel pipe 2. Using a bench grinder stone wheel de-burr the pipe 3. TIG weld it to the other pipe 4. Sand the tube with a sander until its flat 5. Clean with a wire wheel 6. With wire wheel on bench grinder clean the edges of the tube Repetition of some of the above steps may be required to make sure the cut is flat and burr free. Very time consuming. Cutting Stainless Pipes – Two Recommended Methods Orbital pipe saw is a recommended method to cut and bevel stainless steel pipes. The saw blades are small, rotate at high speed, inexpensive, and available in different versions for different materials and wall thicknesses. Cutting is executed by manually rotating the machine housing 360 degree around the pipe. Next, with a circular toothed blade, the pipe is cut with a single rotation. The cutting action takes mere seconds and end result is a straight and clean cut.

Saw Guide combined with Portable Band Saw

 The portable band saw cut should have enough power and be strong. The guide had eliminated most of the vibration. Constant flow, it is important that the tool mounted on the Stainless steel.

November 17, 2010

Steel Pipes’Many Uses

Filed under: Uncategorized — Tags: , — manager @ 10:36 am

Look around you. Steel Pipe is everywhere! Anywhere you turn or look, you will see some sort of structure or means of conduit that steel pipe is being used for. And that’s not to mention the pipe that is “out of sight, out of mind” that is serving its purpose under the ground.

Steel Pipe is everywhere. Pipe can be fabricated for many purposes. Look at the Large O.D. Pipe being used for billboard structures when traveling down most any highway. It’s used in parking lots, for “Bollards” or “Bumper Posts”. Just about any restaurant or place of business has an outdoor sign mounted on a pole made of steel. Look at all of galvanized pipe used for highway signs. The list goes on and on, fence posts, culvert pipe at the end of your driveway, pipe piling to stabilize foundation structures of large building and skyscrapers, slurry line pipe used in quarries and sand operations, columns in the basement of your home. That’s just to name a few structural applications.

Standard or nominal pipe sizes can be found on a pipe chart that is used throughout the industry. The Nominal Pipe Size or N.P.S. chart, gives the actual O.D. or Outside Diameter, the Nominal O.D., Wall Thickness and Weight Per Foot of each steel pipe size. If you don’t know anything about N.P.S., its recommended that you take a look at the chart before buying any or doing any projects with pipe.

There are basically three different types of pipe, and they differ in the way they were manufactured. There is seamless steel pipe that starts out as a solid round and after being heated almost to melting point, a hole is pierced through the center with a tool and creates the pipe. This is know as “Hot Finsh Seamless Pipe”. The second and most popular variety known as ERW or “Electric Resistance Welded” Pipe, starts out as a reel or cut-to-width coil of steel, known as “Skelp”. The Skelp is maneuvered through a series of rollers that make it round and then as the edges come together, an electric welder makes the longitudinal seam down the length of the pipe. The last and least used manufacturing method is “Buttweld” steel pipe. It is basically the same process as the ERW pipe, except after being rolled up, the edges are heated up and fused together to create the pipe. Larger O.D. steel pipe can be made by rolling and welding pieces of steel plate into cylinders or “Cans” and then welding them together end to end to make the pipe.

In addition to all of the structural applications, Pipe is used by the mile for potable water lines and drainage purposes. Pipe used for “Casing Pipe” that is pulled or jacked into the ground, to encase and protect utility lines under highways, railroads, lakes and rivers. But the main use of a new prime pipe product is “Line Pipe” that is used in the oil and gas industry for conveyance of product from the rig to the refinery.

No matter if its reconditioned used pipe that was taken up from the ground after being decommissioned, new surplus pipe that was leftover from a project or mill rolling, mill reject pipe that has been downgraded due to abnormalities or failed testing or a brand new prime steel pipe product complete with Mill Test Reports to MTR’S, there is a place or use for it in our world.

November 16, 2010

Stainless Steel Pipe Welding

Filed under: Uncategorized — Tags: — cps @ 8:13 am

Stainless steel pipe welding is gravy work. Always has been. Always will be.If you can do it and do it well, you are the man that will never go hungry. But it takes some attention to detail to do it right.

The main thing that separates the men from the boys or should I say, the real welders from the rod burners is the willingness to follow procedures for welding stainless steel. Procedures like waiting for the pipe to cool in between passes, keeping the hot tip of the rod shielded with argon, snipping the tip of the tig welding rod when it gets crapped up, keeping your tungsten sharp.

One of the main procedures I am talking about is PURGE. Stainless steel absolutely has to be purged with argon gas in order to prevent sugaring. Sugaring is also called granulation but it is severe oxidation no matter what you call it.

You cant even get away with tack welding without an argon purge that shield the back side or inside of the pipe. So how do you do it? How do you protect the back side with argon?

What is enough? The only way to tell for sure is with an oxygen analyzer. A bic lighter will not do the trick. Even 2% oxygen content will blow out a bic lighter. And 2% oxygen will result in a black root pass.

Usually it is done with aluminum duct tape. The ends of a Stainless steel pipe are taped shut and the whole inside is purged with argon gas. Even the opening in the pipe joint itself is taped so that argon can fill the entire pipe and push out any oxygen. The tape is peeled back just enough to get a tack once the pipe is purge enough.

November 15, 2010

Use a Steel Pipe in Your Home

Filed under: Uncategorized — Tags: , — cps @ 8:14 am

Steel Pipes are tubular and hollow materials. One type of pipe is the steel pipe which used to be popular among industrial and commercial constructions only but as years and more pipe developments evolve it is now widely preferred to be incorporated in residential constructions.

Its history dates back to 2000 BC and progressively developed into one of the most sought pipes in the recent days. Pipes are basically everywhere. It is located underground as it basically composes your plumbing system. They are used for the proper flowage of liquids, gaseous liquids, and can also be used to transfer bulky materials in factories. They are available in three types, namely seamless pipes, stainless steel pipe, and carbon pipes. The three basically differs with their usage and functions. Seamless are ideal for the use of combustible liquids while carbon pipes are best for liquids with high temperature or can be used in boilers.

On one hand, Stainless Steel Pipe have excellent corrosion resistance, fully recyclable and rust free. It is rust free and choosing steel pipe over the other will definitely something worth of your investment. On the other hand, steel pipes are quite costly compared to the other types of pipes but its advantages and features are worth it.The benefits that come along with the choice of pipes are a lot namely, corrosion resistance since it is resistant to chemicals and combustible fluids, durability since it remains undamaged by rots, insects, or fires, flexibility as it can be fabricated into different strengths and sizes, needs low maintenance and easy to install.

Learn more about the Stainless Steel Pipe,please visit our site.

November 13, 2010

The Pressure of Seamless Steel Pipe

Filed under: Uncategorized — Tags: — cps @ 11:17 am

The pressure of  Seamless Steel Pipe is generally composed of pieces of standard parts, so the pressure pipe design component is the selection of its standard parts. The pressure level of pipelines is determined to the pressure level of its standard parts.

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 Seamless Steel Pipe. To simplify the description, we often call the nominal pressure rating as pipe pressure grades.

Pipeline pressure level consists of two parts:
One is nominal pressure rating which is expressed in the Nominal pressure of the standard parts. The other is wall thickness rating which is expressed in the wall thickness of the stand parts.

The calculation 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 in infrastructure and reliability of pipelines.

November 10, 2010

The Development of Seamless Steel Pipe

Filed under: Uncategorized — Tags: — cps @ 8:13 am

At present, the world’s total steel pipes production are in more than 5,100 plant in more than 1850 companies in more than 110 countries, including more than 260 plant manufacturing oil seamless steel pipes in more than 170 companies in 44 countries. In 2000, apparent consumption of seamless pipe for the country is 4.18 million tons, of which the domestic supply is 3.821 million tons, accounting for total domestic demand for 91.4%, and the import is 359,000 tons, ccounting.

For total domestic demand for 8.59%. In the same year, consumption of oil pipes is about 910,000 tons. The import is 252,000 tons. From the view of ternational and domestic markets, the capacity of seamless steel pipe (OCTG) are greater than the existing demand. Therefore, it is a long-term task and the key to the successful development for domestic steel enterprises to increase the market competitiveness.

November 9, 2010

The Category of Seamless Steel Pipe

Filed under: Uncategorized — Tags: , — cps @ 7:26 am

Seamless steel pipe is divided into hot-rolled pipe and cold-drawing pipe by the manufacturing methods. The largest nominal diameter of cold-drawing pipe is 200mm, hot-rolled pipe with 600 mm. In the pipeline project, when the diameter is more than 57mm, the hot-rolled tube is the regular selection; otherwise, the cold-drawing tube. Seamless steel pipe commonly used in pipeline projects has the following three types:

General Seamless steel pipe: general Seamless steel pipe is usually called seamless steel pipe. It is made of ordinary carbon steel, quality carbon steel, ordinary low-alloy steel and alloy structural steel. We usually use it to produce liquid transportation pipelines or the production structure, and parts.

Seamless steel pipe for low and medium-pressure boiler: it is usually made of steel No. 10, 20. Hot-rolled steel is delivered in hot rolled state and cold-rolled steel is delivered in cold rolled state.

Seamless steel pipe for high-pressure boiler: it is mainly used for making quality carbon structural steel, alloy steel and heat-resistant stainless steel. The pipe is delivered in hot rolled state. Otherwise, it has definite requirements for microscopic structure, grain size, and decarburized layer.

November 8, 2010

Circular steel pipe and shaped steel pipe

Filed under: Uncategorized — Tags: , , — cps @ 10:22 am

The stainless steel pipe can be divided into circular steel pipe and the shaped steel pipe by different cross-sectional areas.

Under the condition of the same Circumference, the area of circle reaches the largest. So there can be more fluid delivery with a circular tube. In addition, when the ring cross-section is subject to the radial pressure to internal or external, the force is more evenly. Therefore, most of stainless steel pipes are circular. However, the circular steel pipe also has some limitations. For example, the bending strength of the rectangular steel pipe is better than that of the circular steel pipe under the conditions of plane bending. The rectangular tube is widely used in a number of sets of frames of farm machines, and steel-wood furniture. The pipes of shaped cross-section are need for different purposes.

November 5, 2010

Production Methods of Seamless Steel Pipes

Filed under: Uncategorized — Tags: — cps @ 11:21 am

According to different production methods, seamless steel pipe can be divided into pipe, cold-rolled pipe, extruded pipe, etc.

seamless steel pipes are produced in auto-pipe mill generally. Cut the solid tube blanks, set the centering on the surface of the tube blanks, heat the tubes by heating furnace, and punch holes in punchers. Tube blanks becomes vacuum gradually by the effect of the roller and tappet, and the circumrotation and forward of the puncher. It is called capillary tube and then continues to rolling the tubes at the auto-pipe mill again.

It must adopt the cold rolling or cold drawing or both of the two methods to produce the pipes if you want to acquire the smaller size and better quality seamless steel pipes. Cold drawing is usually made in single-chain cold-drawing machine or double-chain cold-drawing machine with 0.5～100T.

The extruded method means that bring the heated tube blanks to the airtight extrusion cylinder, extruded sections will be extruded from the smaller die hole under the effect of the moving of the rohreintreibdorn and pressing stem. This method can produce the seamless steel pipes with smaller diameter.

November 4, 2010

Four reasons why you should use a cold rolling mil

Filed under: Uncategorized — Tags: — cps @ 1:16 pm

Here are two main types of laminators available – hot and cold water – and both have advantages. This article examines four reasons why you should use a Cold-Rolling-Mill : versatility, ease of use, security and requires no electricity.
Versatility. Generally, cold rolling mills is much more versatile than they burn. MainThis is because some documents during a thermal treatment unit can be damaged. Some of these items are photographs, newspaper clippings and old documents, including printed with inkjet printers. Beside the cool cars, the craft can be used magnets and stickers on the well. It is also possible to use any of the installation of these devices to create professional-looking photos.
User-friendliness. One of the best reasonsthrough the radiator is that it seems very easy to use, especially compared with the hot engine. Thermal laminators are several options that are controlled (temperature, speed) have, which can often heating, which take some time. In addition to hot to not use the vehicle with glue, which can leak from the damaged plastic require. You do not have to worry about a cold rolling mill, which is great. It also helpsThis saves time, which is always a good thing.
. Hot seat belt can be dangerous. After all, with the adhesive device or machine on the market that is very hot. There is also the possibility of overheating and fire. These are not the best device that is used around children and pets, making it an excellent choice for radiators. With the site, but great-looking documents, butwithout risk of damage and fire.
No power. Another reason for using a Cold-Rolling-Mill , because it requires energy. They are handmade, to save money on electricity bills. In addition, as above, these devices are mentioned, and never worry about overheating.

As you can see, there are good reasons for a Cold-Rolling-Mill. These machines provide clear results, and you need itPerfect preparation heat-sensitive materials such as photos. It can also magnets and are used for labels and are very safe and easy to use. No need to worry about overheating of the machine, a person is burnt, or the danger of fire, so that these devices for use in schools and offices. He does not need to deal with high energy bills. In short, the cold rolling mill that will be used if you want to protect documents can.

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