The Specification of ERW Steel Pipe

Some consumers haven't a awfully clear construct concerning of the definition, manufacture processing and application of ERW steel pipe. Today, Prime steel pipe can provide specification of ERW pipe in details for all of you.

The definition of ERW pipe

ERW pipe (also known as ERW steel pipe) is that the abbreviation resistance Welded Pipes. resistance fastening refers to a bunch of fastening method (including spot and seam fastening) that turn out conglutination of faying surfaces wherever heat to create the weld is generated by the ohmic resistance of fabric combined with the time and therefore the force accustomed hold the materials along throughout welding. ERW steel pipes and tube are available in various qualities, wall thicknesses, and diameters of the finished pipes.

ERW tube manufacturing process

ERW steel pipe is manufactured by rolling metal and then welding it longitudinally across its length. ERW steel pipes are welded longitudinally, manufactured from Strip / Coil and can be manufactured up to 24”OD. ERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge.

Typical ERW tube manufacturing process of Prime Steel Pipe generally involves the following stages in a step by step procedure.

ERW steel pipe’s application

ERW steel pipes are used in various engineering purposes, fencing, scaffolding, line pipes etc. It is available in lengths from single random to 120 feet depending on mill capability. What's more, ERW steel pipes are usually used for Agricultural purposes, Drinking Water for housings, in collieries for extraction of Water, Thermal Powers, Transports, Hand pumps for deep boring wells, as a powerful protection for cables by telecommunication Department, Structural functions etc. ERW steel pipe is obtainable with sq. ends or beveled for fastening, rib and matched and victaulic grooved. Surface end of it's on the market in black or vacant, or with protecting coatings.

Prime Steel Pipe have a awfully massive production capability of ERW steel pipes, in order that we are able to manufacture ERW pipes and tubes of various size and form supported the purchasers necessities.

Pipe Application: Oil Pipeline

The main type of pipe that used in Oil pipeline is carbon steel pipe, including seamless steel pipe and welded steel pipe.

Seamless steel pipe is applicable to transport strong corrosive oil or transport in the high temperature conditions as it has the characteristics of high strength, specifications and more features. The technology of seamless steel pipe includes hot rolling and cold drawn.

Welded steel pipe includes LSAW steel pipe and SSAW steel pipe. The process characteristics of carbon steel pipe leads the steel pipe to tend to become brittle at low temperatures, so it is mainly applied to the normal temperature pipeline, the use of pipe temperature should not exceed 300 degrees Celsius. In general, the temperature of ordinary carbon steel pipe is between 0 to 300 degrees Celsius. If using the high-quality carbon steel pipe, the temperature range can be broadened from -40 to 450 degrees Celsius. The experimental pressure of the steel pipe is generally 1.5 times of the nominal pressure. When the temperature of the material delivered does not exceed 200 degrees Celsius, the working pressure is the nominal pressure. When the temperature exceeds 200 degrees Celsius, the working pressure should be correspondingly lower than the nominal pressure.

Prime Steel Pipe as an excellent manufacturer, has complete production lines to produce SSAW steel pipe. No matter what requirements you have, Prime Steel Pipe will surely make you satisfied.

What is Galvanized steel pipe?

Galvanized steel pipe is a steel pipe that has been coated with zinc. This coating protects the steel from corrosion. It is most commonly used for outdoor construction like fences and handrails, or for some interior plumbing. It is also sometimes called galvanized iron pipe.

The process of galvanization was first discussed by scientists in the 1770s, nearly 60 years before it was finally introduced in the 1830s. French engineer Stanislaus Tranquille Modeste Sorel took out the first patent for the process in 1937, and began manufacturing it soon after. By the 1850s, Europe was producing galvanized steel out of manufacturing plants located around the continent. The United States followed shortly thereafter, opening its first plant in the 1870s.

To create galvanized steel pipe, steel materials are placed into a molten bath of zinc. This process is also called hot dip galvanization. The two metals are chemically bound to one another in this process, and will therefore never separate, resulting in a more resistant and longer lasting version of steel.

This type of pipe is not suited to gas lines, but was very commonly used for full, in-home plumbing until the mid- to late 1900s, when copper replaced it as the pipe material of choice. It was discovered at that time that lime scale buildup occurred faster in galvanized steel pipe than in copper or plastic. It is still sometimes used indoors for plumbing, particularly for the replacement of small areas of pipe, in which the flow will not be greatly interrupted by sections of lime scale.

Outdoor applications are a more common use of galvanized steel pipe in the modern age. It is most likely to be seen on chain link fences or handrails. It is highly resistant to corrosion, which makes it a perfect choice for goods or materials that will be exposed to the elements on a regular basis.

Galvanized steel pipe is generally connected by threads on either end of a length of pipe. A small amount of adhesive is typically placed on the threads before screwing them together, in order to reinforce the connection. If no threads are available, the pipes and fittings can be welded together, although caution should be taken because the heat from welding can release dangerous zinc fumes into the air. Pipes can be cut using a cutoff saw or hacksaw. 

API line pipe factory production specifications

This is steel pipe for pipeline transportation systems in the petroleum and natural gas  industries.  API 5L is suitable for conveying gas, water, and oil.  Size range is limited  only by manufacturer’s capabilities.

API line pipe factory production specifications adhere to the International Organization for  Standardization ISO 3183, which standardizes pipeline transportation systems within the  materials, equipment and offshore structures for petroleum, petrochemical, and natural gas  industries.  The technical committee authoring the standards recognized that there are two  basic Product Specifications Levels (PSL) of technical requirements and therefore developed  PSL 1 and PSL 2.  PSL 1 is a standard quality for line pipe where PSL 2 contains additional  chemical, mechanical properties, and testing requirements. 

Grades covered by this specification are A25 ,A ,B (and the following "X" Grades), X42,  X46, X52, X56, X60, X65, X70, X80.  The two digit number following the "X" indicates the  Minimum Yield Strength (in 000's psi) of pipe produced to this grade.

In Stock ERW Pipe Price 2017/02/24

 Updated Price List For In Stock ERW Steel Pipe On FEB,21,2017

Intro to Hot Dip and Cold Galvanized Steel Pipe

Galvanized pipe can be classified into two kinds: cold galvanized steel pipe and hot dip galvanized steel pipe. The former has been forbidden, and the latter has been advocated temporarily in China.

1. Hot Dip Galvanized Steel Pipe

Hot dip galvanized steel pipe is to make the molten metal react with iron substrate so as to produce alloy layer so that the substrate can be combine with coating combination. Hot dip galvanized steel pipe is first taken acid pickling in order to remove iron oxide on the surface of the steel tube. After acid pickling, clean up in the tank of ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed aqueous solution, and then sent to the hot dip plating tank. Hot dip galvanized has the advantage of uniform coating, strong adhesion, long service life, etc.

Steel substrate react complex physically and chemically with molten electrolyte solution, and then form into zinc-iron alloy layer with the compact structure of corrosion resistance. Pure zinc alloy layer, alloy layer and steel substrate are integrated with each other. So, its corrosion resistant ability is extremely strong.

2. Cold Galvanized Steel Pipe

Cold galvanizing is electricity galvanizing, but the galvanized quantity is very few about only 10 g to 50 g per square meter. Its corrosion resistance ability is weaker than that of galvanized pipe. Regular galvanized steel pipe manufacturers mostly do not use electric galvanized zinc (cold galvanized) in order to guarantee the quality. Only those small enterprises with small scale and old equipment adopt electric galvanized zinc. Of course, the price is relatively cheaper. At present, the Ministry of Construction has officially indicated to weed out cold galvanized pipe which is now lagging in technology and it is not allowed to use cold galvanized pipe as water and gas pipe in the future.

The zinc layer is electrodeposited coating, and zinc layer and steel substrate layered independently. Because the thin zinc layer attached on the steel substrate is simply easy to fall off, the poor corrosion resistance is not strong. In the newly-built residence, it is prohibited to use the cold galvanized steel tube as the feed pipe.

Heat the iron and steel industry will continue in 2017?

In 2017, China's steel industry will still in a critical period of transformation and upgrading, the situation is still grim. As the welding steel pipe, seamless steel pipe, galvanized pipe, straight seam submerged arc welding pipe, carbon steel pipe manufacturer, scaffolding, and other products production services vendors, Shinestar group thinks, although in 2016 iron and steel enterprise profitability, a successful counter attack, but it is not optimistic.

Industry fundamentals, the situation of oversupply of steel market is not a fundamental change, iron and steel enterprise's profit foundation is still not strong enough. On the one hand, the high volatility in the prices of raw materials, such as coke, ore, iron and steel enterprise profit control to bring greater pressure. Since this year social inventory exploded on the other hand, the first week of Spring Festival domestic steel inventories rose to 50%, high inventory needs certain time, may be longer than expected time before industry. And monetary policy fine-tuning since this year, before the Spring Festival, the central bank raised lending facilities (MLF) interest rates after the mid, and after the central bank raised its multiple deadline reverse repurchase and stock lending facilities (SLF) interest rates, interest rates from the long side interest rates to short end, up market interest rate curve, liquidity tightening signs for a more cautious attitude to the futures market operation, greatly influenced by phase current linkage. There are some unclear steel spot market direction.

The ministry released earlier this month the first announcement to cancel the specification of 35 list of iron and steel enterprise, this is the 2012 years since its steel industry standard management, start list by "addition" change "subtraction" for the first time. Means that dissolve the iron and steel industry in 2017 will further strengthening its excess capacity.

Recently, the five ministries jointly issued by the "about further implement pressure balance policy promotes the steel market has kept running notice. "Notice" pointed out that before the recovery period of steel prices, show that the serious problem of excess steel production capacity in our country have a certain degree of improvement. Recently appeared steel prices of spot and futures markets and rapid rise in the short term, but China's steel industry oversupply problem has not been fundamentally solved. Also notice again, to crack down on illegal production and sales "groud of steel" behavior, before the end of June 2017 in accordance with the law to ban the production of construction steel power frequency furnace, intermediate frequency furnace capacity, manifests the country determined to clean up behind the capacity determination.

Clean up 2017 "groud of steel" as an important content to work capacity. Provinces such as guangdong, jiangsu, hebei, sichuan also have issued relevant documents, determined to crack down on illegal production "groud of steel" production and sales. Iron and steel industry in China has developed from incremental into the stage of development, reducing the overall production capacity surplus part of the advanced capacity are resolve, "groud of steel" must clean up all.

As a based in China, service global steel production enterprises, Shinestar group will work hard to realize the transformation and upgrading, combined with their own situation to make strategic plan, produce the high quality of welded steel pipe, seamless steel pipe, galvanized pipe, straight seam submerged arc welding pipe, carbon steel pipe, scaffolding, and other products, promote the competitiveness of the enterprise.