Differences Between Steel Pipe & Black Iron Pipe

The average homeowner is unaware of how much piping leads into and out of their home. There are the ever-present pipes underneath the sink or ones leading to the hot water heater. However, an in-depth look behind the walls and underneath the ground reveals that there are enough pipes to wrap around the house several times. There are HPVC, PVC, black iron and steel pipes leading everywhere.

Steel Pipe

  • A steel pipe is made from steel and is used in things such as fences, oil lines, water treatment facilities and bridges. It is very durable and long lasting. Inside the home, it is usually the pipe system that connects the lines from the local water supply or septic tank to the house. Houses near bodies of water will use steel because it corrodes less easily.

Black Iron Pipe

  • Most homes built before the 1960s have black iron pipe for things such as water and gas lines. It is a form of steel pipe, but made from more malleable products. Most modern homes use PVC pipe, which is cheaper and easier to work with. However, some re-modelers are going back to to black iron pipes because it is very durable for gas. It is rarely, if ever, used anymore to transport water into a home because it corrodes easily.

Working Differences

  • Construction is the main difference between the two products. Black iron pipes will have seams that allow the user to connect them easily to other pieces of pipe using connector valves. Steel pipe is more often used in industrial applications and it needs to be welded. Even experienced craftsmen have trouble working with both kinds of metal, so do-it-yourselfers shouldn’t get discouraged if they make some early mistakes.


  • Steel pipe will have a very fine feel to it and almost be cool to the touch. It won’t scratch as easily as black iron pipe, but that doesn’t meant it can’t be damaged by a wrench or hammer while working around it. Black iron pipe is course and grainy and will feel the same at room temperature. Black iron pipe will also flake if it is handled a lot. However, both can be heated very easily and will burn the user’s hand.


  • The main problem with black iron pipe–especially in the home–is leakage at connector spots. It requires a lot of work to fix these leaks, which is why many people no longer use black iron pipes. Steel pipes do not have that problem because it is most often welded. However, it is more expensive than black iron pipes or PVC.


  • Steel pipe will usually cost about 20 percent more than black iron pipe, but it does a better job of saving resources in the long run by being more energy efficient. Its durability and cost are part of the reasons that use of steel pipes for large industrial jobs has grown in the United States. However, black iron pipe is more widely available than steel, which also makes it more convenient.

(This article comes from eHow editor released)

The use of seamless steel pipe

Seamless steel pipe and other long strip just the biggest difference is that it is no seams around the steel pipe section is hollow. Due to the different cross-sectional shape, and often be classified as circular steel pipe and the opposite sex, from the actual use of efficiency, of course, or tube-type pipe is more common. Wonder what is the use of seamless steel pipe?

Speaking of the use of seamless steel pipe we are most familiar with it is natural gas, water and other daily use of fluid transport. In addition to these common and familiar natural gas and water transport, seamless steel pipe is also widely used in the transport of oil, gas and some solid materials. Seamless steel pipe to achieve the transport of convenience to facilitate people’s modern life, greatly reducing the transportation costs of natural resources.

Secondly, because the seamless steel pipe hollow, its quality is much lighter than the solid steel pipe, naturally more affordable. And thus plays an important structural member and a component role in the manufacture of a drill pipe, a bicycle frame such as an automobile drive shaft, an oil, or the like. But also reduce the unnecessary waste of resources, reducing the total weight of finished products.

In addition, seamless steel pipe is often used as raw materials for ring metal parts, not only save a lot of complex processes, but also greatly reduces the production process of steel loss, saving production costs. This processing principle is not difficult to understand, a bit similar to cut the spinach, a knife cut down can quickly get a ring small circle parts, the loss to a minimum.

Above are talking about the cross-section of the seamless steel pipe, this round seamless steel pipe is not perfect. It is relatively poor bending, can not afford a greater force. Therefore, in the use of agricultural machinery skeleton, furniture, etc. will be used for seamless steel pipe into a square or rectangular, to increase the compressive strength of seamless steel pipe.

Advantages of LSAW steel pipe

In the long-distance pipeline construction, with steel lines account for a large proportion, under normal circumstances, 35% to 40% of line pipe investments accounted for total project investment.

How to choose a reasonable price, excellent performance of the pipe is particularly important, a reasonable choice to save the pipe construction investment, to facilitate the construction and safe operation of the pipeline system has a very important impact. LSAW steel pipe advantage make it can be widely used for its unique long-distance oil and gas pipelines.

Advantages of LSAW steel pipe are:

  1. without the unwind process, the base material indentation, scratch less.
  2. the wrong side, slotted, and other easy-to-diameter perimeter control, excellent welding quality.
  3. the elimination of flaring basically does not exist residual stress after stress.
  4. because it is a straight line weld, the weld is short, little risk of defects.
  5. after expanding, pipe geometry accuracy is improved greatly facilitate the on-site welding.
  6. for a straight seam, less impact on the quality of anti-corrosion coating materials.

(This article comes from Sunny Steel Enterprise editor released)

High-pressure pipes 

Maximum working pressure 300 MPa (43 500 psi)

The range of SKF High-pressure Pipes covers most applications where there is a requirement to transfer oil at high pressure. They consist of a steel pipe with a steel ball fitted to both ends. Two swivelling connection nipples press these balls against the seating of the connecting hole and thus sealing against oil leakage.

  • Wide range of pipes
  • All pipes are pressure tested during production
  • Special lengths (up to 4 000 mm / 157 in) made on request

Safety note

For safety reasons, these high–pressure pipes have a maximum service life. All SKF High-pressure Pipes are hard–marked with the year in which their service life expires e.g. Do no use after 2021.

High pressure pipes are marked with their maximum working pressure e.g. MAX 400MPa.

The pipe colour also indicates the maximum working pressure. Black pipes can be used up to 300 MPa, whilst grey pipes can be used up to 400 MPa.

(This article comes from SKF editor released)

Special Application of Steel Pipe Piles – Retaining Walls

Steel Pipe Pile Walls

Steel pipe pile walls consists of a steel pipe and clutches welded on either side of the steel pipe. One SPSP is connected to the next one by interlocking their clutches. The most commonly used clutches are the P-P, P-T and L-T types.


Steel pipe piles can also be joined into continuous retaining walls by connecting them with conventional sheet piles as intermediate sections. These combined walls have enhanced resistance to vertical and horizontal loads compared to the conventional sheet pile sections. They can be used as quay walls, breakwaters, temporary cofferdams, retaining walls, bridge foundations, and other various civil engineering structures.

Pile Shoes

Steel pipe piles can be reinforced with pile shoes according to the specified bearing capacity and ground conditions.

(This article comes from PPI INDUSTRIES SDN BHD editor released)

History of Steel Pipe

People have used pipes for thousands of years. Perhaps the first use was by ancient agriculturalists who diverted water from streams and rivers into their fields. Archeological evidence suggests that the Chinese used reed pipe for transporting water to desired locations as early as 2000 B.C. Clay tubes that were used by other ancient civilizations have been discovered. During the first century A.D. , the first lead pipes were constructed in Europe. In tropical countries, bamboo tubes were used to transport water. Colonial Americans used wood for a similar purpose. In 1652, the first waterworks was made in Boston using hollow logs.

Development of the modern day welded steel pipe can be traced back to the early 1800s. In 1815, William Murdock invented a coal burning lamp system. To fit the entire city of London with these lights, Murdock joined together the barrels from discarded muskets. He used this continuous pipeline to transport the coal gas. When his lighting system proved successful a greater demand was created for long metal tubes. To produce enough tubes to meet this demand, a variety of inventors set to work on developing new pipe making processes.

An early notable method for producing metal tubes quickly and inexpensively was patented by James Russell in 1824. In his method, tubes were created by joining together opposite edges of a flat iron strip. The metal was first heated until it was malleable. Using a drop hammer, the edges folded together and welded. The pipe was finished by passing it through a groove and rolling mill.

Russell’s method was not used long because in the next year, Comelius Whitehouse developed a better method for making metal tubes. This process, called the butt-weld process is the basis for our current pipe-making procedures. In his method, thin sheets of iron were heated and drawn through a cone-shaped opening. As the metal went through the opening, its edges curled up and created a pipe shape. The two ends were welded together to finish the pipe. The first manufacturing plant to use this process in the United States was opened in 1832 in Philadelphia.

Gradually, improvements were made in the Whitehouse method. One of the most important innovations was introduced by John Moon in 1911. He suggested the continuous process method in which a manufacturing plant could produce pipe in an unending stream. He built machinery for this specific purpose and many pipe manufacturing facilities adopted it.

While the welded tube processes were being developed, a need for seamless metal pipes arouse. Seamless pipes are those which do not have a welded seam. They were first made by drilling a hole through the center of a solid cylinder. This method was developed during the late 1800s. These types of pipes were perfect for bicycle frames because they have thin walls, are lightweight but are strong. In 1895, the first plant to produce seamless tubes was built. As bicycle manufacturing gave way to auto manufacturing, seamless tubes were still needed for gasoline and oil lines. This demand was made even greater as larger oil deposits were found.

As early as 1840, ironworkers could already produce seamless tubes. In one method, a hole was drilled through a solid metal, round billet. The billet was then heated and drawn through a series of dies which elongated it to form a pipe. This method was inefficient because it was difficult to drill the hole in the center. This resulted in an uneven pipe with one side being thicker than the other. In 1888, an improved method was awarded a patent. In this process the solid billed was cast around a fireproof brick core. When it was cooled, the brick was removed leaving a hole in the middle. Since then new roller techniques have replaced these methods.

(This article comes from Made How editor released)