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.

China's Program will Inject New Impetus into Globalization

Since 2016, the global economy is generally stable, but downturn situation has not fundamentally changed. Hunan Shinestar Steel Research Institute said that 2017 global economy will remain low growth and low recovery trend, "reverse globalization" wave of China's economic globalization program inject new impetus. As a manufacture of seamless steel pipe, OCTG, spiral welded pipe, stainless steel pipe,  galvanized pipe and other products, Shinestar Group will continue to pay attention to the world economy and China's economic development trends.

World economy needs to strengthen global economic governance, but the British off the EU referendum and Trump put forward the "US priority", which made regionalization to split and lost in globalization. In Europe, the US strategy is shrinking. In this context, new forces are needed, and new programs are leading global governance to a new stage. China is the world's second largest economy, China's economic development can not be separated from the world, the world's economy also needs China.

From the financial, trade, investment the three areas, by the effect of new president of the United States and the dollar interest rate and other factors, the global financial market will remain volatile and uncertainty in the short term, especially in emerging market countries will have to face the risk of currency devaluation and Capital outflow. At the same time, world trade still lack of powerful support, which make slow growth. Although the rebound of commodity prices or will bring some demand, but the magnitude is limited, global trade growth rate will remain lower than the economic growth. Global investment will be stronger due to USD raised, new trade protectionism and other factors, the recovery process is blocked. However, the rise of the fourth global industrial transfer, may lead to rebound in global investment. In addition, the Hangzhou G20 summit strong impetus to the global efficient financial governance which is good for developing countries and  inject new momentum for global economic growth.

The report notes that during the cyclical transformation of the world economy, China's five major development concepts will not only lead China's economic development, but also will lead the world economy into a new long-term positive kinetic energy. Globalization is at a crossroads in the transformation and incubation of the new cycle of the world economy. "One to one," the building tactics not only for the global economy out of the crisis haze, to realize powerful recovery and sustainable development provides new ideas, but also against the trend of globalization to promote economic globalization has injected new impetus and vitality.

In the future, Shinestar Group will take the opportunity to meet the challenges, and strive to develop themselves to produce more high-quality spiral submerged arc welded pipe, ERW steel pipe, stainless steel pipe, scaffolding, galvanized pipe and other products to develop China's economic.

In Stock ERW Steel Pipe Price 2017/01/07

Updated Price List For In Stock ERW Steel Pipe On JAN,07,2017

Why ERW steel pipe Equipments Are Being Introduced

Why ERW steel pipe Equipments Are Being Introduced

Now, a lot of metallurgical equipments in our country can be designed, manufactured and integrated by ourselves. After China jointly designing with foreign countries and summarizing the experiences and lessons of installation, commissioning, usage, maintenance, and transformation of foreign equipments, our current design has reached a high level. 

China with manufacturing capabilities can design and manufacture the world-class advanced metallurgical equipment, especially the ERW (Electrical Resistance Weld) Steel Pipe equipments under present design condition and environment. Then, why some products, especially for high-producing, high automated advanced continuous rolling pipe equipment units, are still need to be introduced? The main problem is the level of the equipment and stability, namely many accidents, poor stability and more slowly production speed.

There is a big problem that is: domestic equipments are cheap and fast. In order to seek for cheap and fast products, it is easy to reduce design level and manufacturing cost, shorten the design and debugging cycle. Therefore, the level is decreased accordingly. In addition, in order to seek for stability, our large state-owned enterprises are generally not willing to bear the liability for risk. This could be the current reason that domestic equipments can only be introduced among the private enterprises.

In addition, we should also be clear that all the highly automated and advanced equipment with high performance are not only be designed and manufactured. They all need serious debugging, commissioning and certain amount of time to a test run. This is an insurmountable stage and only in this way, domestic equipments can march towards a higher level. ERW Steel Pipe production equipments in China now are the time to enter the international market. Some developing countries, especially those who have the iron ore resources, are considering starting building ERW Steel Pipe, factory in dealing with the global crisis as this is a rare opportunity. 

In Stock ERW Steel Pipe Price 2017/01/01

Updated Price List For In Stock ERW Steel Pipe On JAN,01,2017

The comparison of ERW steel pipe and LSAW steel pipe

The comparison of ERW steel pipe and LSAW steel pipe

The ERW steel pipe Resistance is high frequency straight seam welded pipe, the English Electric hold Welding, abbreviation abbreviation for ERW, used for transporting oil, gas and vapor liquid object, can meet the requirements of high and low pressure various, currently in the field of conveying pipe in the world occupies a pivotal position.
1, welded pipe refers to the common "submerged arc welding steel pipe," marked "SC" electrical engineering, can be used as water gas pipe can also make the threading pipe, thick.
2, line pipe, wire and tube, thin, with a "T", said can only do threading works.
3, ERW pipe is "high-frequency resistance welding steel tube", unlike ordinary welded pipe welding process, welding seam is composed of steel belt ontology of parent metal melting and mechanical strength than the general welding control. "LSAW steel pipe is the main technique straight seam submerged arc welding steel pipe features: 1 steel tube forming process, the steel plate uniform deformation, residual stress is small, the surface does not produce scratches. Processing of steel pipe diameter and wall thickness of the steel pipe size range, more flexibility, especially in the production of high grade thick wall steel tube, especially in large diameter thick wall pipe has incomparable advantage over other process, can satisfy the requirement of users in the steel pipe specification more; 2 use in the process of the internal and external welding (welding) after welding process, can be in the best position for welding, is not easy to appear the wrong side, partial and incomplete fusion welding defects, such as easy to control the welding quality. 3 for overall mechanical expanding, can effectively improve the size precision of steel tube, and improve the distribution of stress in steel tube, to avoid due to the damage caused by stress corrosion, is advantageous to the field of welding construction at the same time;
4 ,to 9 100% of steel pipe quality inspection, make the whole process of steel pipe production are under effective detection, monitoring, effectively ensure the product quality.
5 ,the whole production line all equipment with the function of the computer data acquisition system networking, realize the data real-time transmission, by the central control room for production.

In Stock ERW Steel Pipe Price 2016/12/24

In Stock ERW Steel Pipe Price 2016/12/24

In Stock ERW Steel Pipe Price 2016/12/20

Updated Price List For In Stock ERW Steel Pipe On December,20,2016

In Stock ERW Steel Pipe Price 2016/12/20

In Stock ERW Steel Pipe Price 2016/12/20

Corrosion Problems of ERW Steel Pipe

ERW steel pipe outer coating of the basic functions,there are two aspects:
First,make the ERW steel pipe surface from electrochemical corrosion,bacterial corrosion protection of soil basic physical media.
Second,resist the soil medium move creep stress,basic mechanical protection method static sterss and abrasion strength and structure and so on.

The basic principles of the outer coating selected city gas pipeline:
a,good insulation properties and mechaniacal properties;
b,good resistance to cathodic disbanding performance;
c,good resistance to water,gas permeability;
d,good chemical resistance properties of soaking and aging;
e,low tempercature and high temperature performance;
f,easy mending and mending;
g,the price is reasonable.

The difference between ERW pipe and HFW pipe

The difference between ERW pipe and HFW pipe
ERW call is one of the resistance welding steel pipe, ERW are respectively corresponding to the first letter of the English word. Resistance welding steel pipe can be divided into ac and dc welding welding two forms.
Ac welding according to the different frequency is divided into low frequency, intermediate frequency brazing, intermediate frequency and high frequency welding welding. High frequency welding is mainly used for thin wall pipe or ordinary wall thickness pipe production, high frequency welding is divided into contact welding and induction welding.
Dc welding is commonly used in small diameter steel pipe.
So, in general, the high frequency welded pipe contained in ERW welded pipe, is a kind of high frequency welding process production ERW welded pipe.

How to Weld for the ERW Steel Pipe in Winter

To ensure that the erw steel pipe in the winter welding perfect follow the following steps:
First, increase the welding current welding, slow down the welding speed, the appropriate increase in the cross-sectional area and length of the weld, if necessary, preheat.
Second, not outside the groove on the base metal to start arc, arc extinction to be filled when the pit.
Third, as far as possible not in low temperature conditions for bending, correction and assembly weldments.
Fourth, preheating before welding, welding process to strictly maintain the interlayer temperature should not be lower than the preheating temperature.
Fifth, the use of low hydrogen or ultra-low hydrogen welding materials.
Six, the entire weld should be finished as far as possible to avoid interruption.