Usage of Hollow Structural Sections

HSS (hollow structural sections) refers to a metal profile that is hollow and tubular. This hollow structural tube (or HSS) is used as a structural element in buildings, bridges and other structures, and in a wide variety of manufactured products. It's produced in round, square and rectangular shapes in a broad range of sizes and gauges.

According to EN10219, EN10225, API and ASTM standards, in a wide range of geometries and wall thickness in HFW, HSAW and LSAW production, suitable for very demanding highly-stressed steel structures such as:

1. Road and Pedestrian Bridges

2. Roofs, Hangars and various Superstructures widely used in airports, stadiums, shopping malls etc.

3. Long-span and slender steel structures

4. Cranes, booms and masts

5. Earth-moving, agricultural & machinery equipment frameworks

6. Road, railway-car and trailer frames

7. Lighting and traffic-poles, road-sign frameworks

8. Jacket foundations for offshore OG & wind power

9. Offshore platform top-sides

10. Jack-up rig frameworks

11. Pile foundations

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Five Differences between ERW and UOE

Firstly, the difference between raw material and production capacity

Raw material of ERW steel pipe is hot rolled steel coils, and raw material of UOE pipe  is hot rolled steel plate. So the ERW steel tube can realize continuous assembly line work, high production efficiency, production cost is low; And UOE pipe made with steel plate processing, unable to realize continuous assembly line, the production efficiency is low, the production cost is high.

ERW steel pipe limited by the thickness of the steel coil, general can produce the biggest thickness is 25 mm, it can produce the biggest diameter is 660 mm; And can produce the maximum thickness of UOE pipe to 40 mm, it can produce the largest diameter is only restricted by steel plate width, now can produce maximum diameter is 1422 mm.

Secondly, difference of the welding

ERW steel pipe welding does not need to add solder wire; UOE pipe is added welding wire.

Thirdly, difference in appearance

ERW steel tube  remove both internal and external welding seam, this is good for anti-corrosion; welding seam of UOE pipe is higher of inside and outside is not so convinient for corrosion.

Forthly, difference of the purchase cost and the difficulty

ERW steel pipe procurement costs low, the cost of UOE pipe is very high, generally spread of 15% to 25%. Domestic production of UOE pipe manufacturer is very few, purchasing difficulty is more higher. When diameter less than 406 mm, the procurement cost difference is higher.

ERW steel pipe manufacturer is more, low purchasing difficulty, when the diameter of <  406 mm, will greatly reduce the purchasing cost.

Fifthly, the application of distinction

ERW steel tube is mainly used in natural gas, refined oil, crude oil, such as pulp land long distance pipeline.

UOE pipe is mainly used in high voltage long distance pipeline, cold area at the bottom of the two, three, four, land area.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Three Advantage for Carbon Steel Pipe Fittings

Durability

Steel is one of the most popular types of pipe fittings and has been used for construction of pipes and pipe fittings for years because of its durability and strength. However, carbon steel, or plain-carbon steel, has the ability become much   stronger through heat treatment.  The more carbon added to the steel, the stronger it can become, which is why it is considered one of the strongest types of steel. Another way to increase the durability is to create a harder surface by adding a layer of chromium. Chrome plated pipe fittings are not only durable, but prevent corrosion and may also make the cleaning process much easier.

Multi-purpose

Carbon steel pipe fittings are typically used for industrial purposes such as commercial construction, electric-power, petroleum refinement and the building of ships, but are also often seen in the household.  They are used for fire sprinkler systems and pipes carrying water, types of flammable gasses, oil or steam. Because of the addition of carbon to the steel, carbon steel pipes and pipe fittings are also much more resistant to rust.  Again, chrome plated pipe fittings will also help to prevent rust and will keep steel looking newly polished. Because chrome plating has a naturally bright appearance, it is utilized more in the automobile industry.

Variety

Because steel has the ability to undergo heat treatment, it’s easy to find carbon steel pipe fittings with just the right amount of carbon for any purpose. Mild carbon steel is typically used when a project calls for a large amount of steel because of its lower price and standard usage. Medium carbon steel is mostly utilized in the automotive industry due to its erosion resistance. Due to its strength, high carbon steel is used in the making of wires and springs. However, once the carbon content reaches 1.0%, it is only used for specific, non-industrial purposes.

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Pre-precision welding

Pre-precision welding technology is currently the most advanced saw pipe of pipe technology, it has the advantage to effectively solve the problem of mutual interference between forming and welding, and give full play to their respective advantages forming and welding, to achieve the organic combination of high speed and low speed welding molding, greatly improve the yield and quality of the production line, effectively reducing the cost of production.

Pre-finish welding process is the spiral forming and welding separately, also called a two-step method.

Step one: high speed steel shaped into a tube, while using carbon dioxide gas welding pre-welding.

Step two: pre-welded steel pipe after finish welding equipment on a separate zone for final finishing welding, internal and external multi-wire submerged arc welding can be used depending on the situation.

Fine welder group consisting of lead, arc plate welding equipment, transport control car, conveyor roller, fine welding bench and so on. Fine welding bench by the conveying roller, longitudinal transfer tracks, sliding truck, orthogonal roller and the drive chassis, internal welding system, outside welding systems, operating system and other components.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.