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.

Chinese economy with stand "look back"

People usually like to set a goal at start of the year,than look back to which goal was reached or which was not.In the past 2016,how about China’s expected goals?Can they stand the test of “look back”?Shinestar Steel Research Institute thinks the answer is yes according to the latest data.

In general,macroeconomic policy should focus on four goals at the same time:economic growth,full employment,price stability and international balance of payments.Accordingly,the government work report in 2016 said the main target in this year is:gross domestic product growth of 6.5% - 7%,consumer prices rose 3%,more than 10 million new jobs in cities and towns,basic balance of international payments.

According to economic growth, gross domestic product in 2016 GDP growth of 6.7% year-on-year, not only in line with expectations, and across the two mark: at one is success across 70 trillion yuan, 74.4 trillion yuan;The other one is after 2014 to us $2014, past the $11 trillion mark again this time.In addition, according to the international monetary fund estimates that India's economic growth rate in 2016 was 6.6%, lower than China.But a year ago, China's GDP growth by 6.9%, India is as high as 7.6%.This means that China's economic growth has been the first to return to the world's major economies.This "first", it is under the big idea of structure adjustment, quality priority, made the task well.

In employment ways,the new jobs in cities and towns of up to 12.49 million people in the first 11 months of 2016, the year 13 million new basic no suspense.The goal of building a town more than 10 million new jobs were not only finished ahead of schedule, and overfulfilled.In prices, consumer prices rose 2% in all the year round, full compliance with the start of "or 3% or so" target;As for the balance of payments, national safe has given the conclusion that overall improvement in cross-border capital flows, flow pressure eased, outside the main investment in China has been a net outflow from into a net.

In addition to the four major goals to finish well, the Chinese economy transcripts of many "bright eye".For example, the "three to one drop one fill results" preliminary revealed, accelerate industrial structure optimization of transformation, the new kinetic energy is more rapid growth, strategic emerging industrial added value growth of a large piece of higher than GDP growth.Shinestar group as submerged arc weld spiral welded pipe, seamless steel pipe, stainless steel tube, scaffolding, galvanized pipe and other products production services vendors, has always been positive response national policy, the future will also be going all out, to transformation and upgrading, promote the competitiveness of the enterprise.

Chinese meet difficult toil under pressure for a year, has brought the Chinese economy withstand "look back" report card.Step by step, has not come easily.Thankfully, this accomplishment this transcript is worth us to have a good collection.Shinestar group will continue to produce more and better the submerged arc weld spiral welded pipe, seamless steel pipe, ERW Steel Pipe, scaffolding, galvanized pipe and other products, for China's economic take-off added "new wing".

China's foreign trade inventory in 2016

Look back over past 2016,though China’s foreign trade growth fell,structure optimization,benefits of quality and so on showed many new changes and bright spot.As a Welding steel pipe, line pipe, straight seam submerged arc welding pipe, galvanized pipe, submerged arc weld spiral welded pipe, scaffolding and other products of steel production services provider,Shinestar group has been paying close attention to the development of foreign trade.Shinestar Steel Research Institute said the development way of China's foreign trade on the import and export trade structure, market distribution and trade subject has different degree of optimization and improvement in 2016 that mainly embodied in these aspects:

First,internal production of power to further strengthen,private enterprises import and export growth of 2.2% in 2016,accounting for 38.1% of China's total foreign trade, up 1.2 percentage points from 2015.Our trade way tend to be more reasonable,the general trade import and export growth of 0.9%,accounting for 55% of the total cost of the foreign trade of our country,up 1 percentage points from 2015.Gradient transfer of processing trade progressed steadily,the import and export of processing trade in the central and western regions increased by 3.2%,accounting for the proportion of total cost of the foreign trade in our country ,up 1.3 percentage points from 2015.The international market diversification has made some progress,some "along the way" along the country's rapid trade growth,to India, Russia, Pakistan, Poland and Bangladesh and other countries import and export growth of 4.1%, 8.7%, 7.2%, 4.1% and 9.2%.

Second,in the superior products in optimal out has made good progress.In terms of exports,China’s traditional advantage products exports growth remained,textiles, plastic products and toys export growth of 1.9%, respectively, 0.5% and 24.9%,still keep a good competitive advantage.At the same time benefit from China's abundant capital, perfect industrial system and strong manufacturing capacity, our country enterprise in the speed up to go out and promote the international cooperation capacity also led equipment manufacturing and export of high value-added products,China's enterprises in accelerating to go out and promote international capacity cooperation also led the equipment manufacturing and high value-added products exports.Some mechanical and electrical products and equipment manufacturing exports also maintained a good momentum, such as medical equipment export growth of 6.1%, auto parts export growth of 3.5%.

Third,in terms of import,China's crude oil, copper and other commodities imports in 2016 continue to maintain the growth momentum, which also shows that China's domestic economy is running smoothly, demand has picked up.At the same time, the policy effect of expanding imports and optimizing import structure shows that some high-tech products such as advanced technology, key parts and important equipment have a rapid growth in import.In 2016, imports of electrical products increased by 1.9%, of which turbojet engine imports increased by 26.8%, ship growth of 26.6%, measurement and analysis of automatic control equipment and apparatus increased by 10.7%.

The future, we need to be more active in the face of complex and volatile international and domestic economic situation and import and export environment, and strive to build an open economy new system, and continuously improve the quality and efficiency of foreign trade development, build a higher level of open economy, the full realization of the "big Into the big out "to" excellent into excellent "change. Shinestar Group will also adhere to independent innovation, pay more attention to cultivate technology, brand, quality, service as the core of the new advantages of foreign trade competition, to produce more high-quality welded steel pipe, pipe, straight seam submerged arc welded pipe, galvanized steel pipe, ERW steel pipe, scaffolding and other products, playing an international competitiveness of the steel group.

In Stock ERW Steel Pipe Price 2017/01/14

Updated Price List For In Stock ERW Steel Pipe On JAN,14,2017

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.

Price Adjustment for Q345 Welded Carbon Steel Pipe

Price Adjustment for Q345 Welded Carbon Steel Pipe

The focus of the current market or gathered in the social stock of Q345B longitudinal welded pipe, the five statistics on Friday the total inventory of the five Q345B longitudinal welded pipe stock total 8.44 million tons, 0.4% WoW, down 9.2%; five Q345B straight seam Weld pipe plant inventory total of 4.899 million tons, an increase of 4.9% WoW, down 16.3% year on year. If you look at the current social stock of Q345B longitudinal welded pipe absolute quantity, there is no doubt that the current market inventory pressure is small, but the steel plant inventory began to rise is worth noting. Because the five major varieties of social stock as a result of the decline in the sample caliber representative, in fact, outside the caliber of the amount of resources or trends in the trend of the sample is not the same, so the process of resource dispersion trend is often the core regional stock transfer to non-core areas .
In addition, as the "car limit set" strictly enforced, in fact, the increase in the amount of in-transit resources have been ignored, taking into account the limited capacity of vehicles in southern China, for example, motor transport cycle basically from the past 1-2 days to 2-5 days , That is, the amount of vehicles in transit than in the past to look through; the same token, in the original fuel materials also exist such a situation. If the vehicle capacity does not improve, this resource does not constitute a pressure on the market, but this year, truck sales rose significantly, from January to October 2016 more than 40 tons of semi-tractor sales rose 98.5%; 25-40 tons between the semi-traction Car sales rose 16.6%; 25 tons and below semi-tractor sales rose 119% year on year.
But in October, more than 40 tons, 25-45 tons and 25 tons the following semi-tractor sales were up 45.9%, 68.4% and 117.8%. In general, the truck sales to the road takes 50 days or so, once the capacity to enhance, ask who is willing to increase the transport cycle to extend and bear the burden of resources and risk of funds in transit, then the latter is not there will be a lot of transit resources into social stock To be tested!
Raw materials, the domestic coal mine production safety requirements more stringent, the major domestic coal mines to ensure safe production, production than the previous period have different degrees of decline, making most of the coking plant inventory of refined coal declined support coking coal prices continue to be strong . Affected by this, high-grade iron ore spot prices are also supported, the current futures and spot basis also reflects this trend. So hope that the original fuel material spot fell may not be desirable, but rather need to pay attention to the price difference between the repair. Of course, this premise is the production of steel production enterprises will not substantially

cut.

The Safe Ways to Use Scaffolding System and Tubes

In high-rise building construction, every step outside the frame to be paved with bamboo basketry or steel fabric, in addition to deaden 1 m high railing and standing bamboo basketry board. On the outer edge of the scaffold, set up safety set net.

Second, the floor protection measures. Now most of the high-rise buildings are concrete frame constructions, widespread adoption MS pipe scaffolding support steel formwork construction. In order to do the protection of the floor construction, can use floor frame. Guard is equal to the height of the two floors of the building, protecting frame width is equivalent to the length of the building a studio.(floor care on the scaffolding tube can prevent falling to the lateral personnel construction, can also be used as a construction safety channel.)  

Three, floor slanted protective measures Some concrete frame building, caused by a lack of hoisting equipment, inconvenient installation floor frame, using steel formwork support. Preferably in the surrounding buildings, the erection slanted plane, vertical height and construction of building height, the same set-up of ledger, carry on oblique one safety net. (the floor is slanted frame, also can prevent the staff falling to the outside, but in the build-up to pick frame, workers have to switch seat belt) four, socket frame protection measures.

Some high-rise building, using the plug in or the ingate cast-in-place reinforced concrete shear wall construction method, in order to ensure the safety of construction personnel. Tool type socket frame can be used, the height of the socket frame over a layer of floor, can prevent the construction layer surrounding the staff fall outward.

In Stock ERW Steel Pipe Price 2016/11/11

API 5L/A53   GR.B, ERW Steel Pipe, Carbon Steel
Outside Diameter	Wall Thickness	Length	Quantity 数量		Remark 标记	EXW CHINA 出厂价
外径 (mm)	壁厚 (mm)	长度 (mtr)	PCS 根数	TON 吨位	Surface,End	USD/TON 美金每吨
168.3	7.5	5.8	50	14.24	BE. BARE	$515.82
355.6	6.8	6.5	75	10.86	BE. BARE	$546.80
508.0	13.0	12	6	2.94	BE. BARE	$560.27
114.3	9.5	6	30	14.30	BE. BARE	$583.16
273.0	8.5	11.8	30	54.91	BE. BARE	$518.52
139.7	4.9	6.5	23	2.55	BE. BLACK	$507.74
219.1	10.5	6	56	22.20	BE. BLACK	$531.99
273.0	9.3	12	23	17.04	BE. BLACK	$523.91
355.6	12.7	6	30	13.10	BE. BLACK	$565.66
406.4	6.4	12	70	40.75	BE. BLACK	$552.19
33.4	3.5	6	132	2.04	BLACK	$504.62
48.3	4.25	6	56	1.55	BLACK	$516.92
73	5.5	6	42	2.31	BLACK	$523.76
76.1	5.5	6	110	6.32	BE. BLACK	$521.03
108	6.5	6	59	5.76	BLACK	$552.48
127	5.6	6	73	7.34	BE. BLACK	$501.48
133	7.7	6	142	20.27	BLACK	$493.68
152	4.3	6	230	21.61	BE. BLACK	$497.48
165	6.0	6	114	16.09	BE. BLACK	$505.98
168.3	3.5	6	165	14.08	BLACK	$490.94
26.7	2.87	6.1	198	2.04	BLACK	$507.94
42.2	3.56	6	345	7.02	BLACK	$498.58
48.3	3.7	5.8	129	3.03	BLACK	$489.22
33.4	3.9	5.8	432	7.12	BE. BLACK	$489.22
73	3.4	5.8	368	12.39	BE. BLACK	$498.58
159	6.0	6.1	123	16.99	BE. BLACK	$481.20
273	9.3	6.1	301	110.70	BE. BLACK	$514.62
133	6.5	5.8	220	25.87	BE. BLACK	$485.21
178	8.0	5.8	206	40.07	BE. BLACK	$491.90
168.3	7.1	6	188	31.88	BE. BLACK	$490.56
Note:  1. The above price is based on bare pipe, for extra coating, please contact sales@primesteeltube.com;
2. The above price is based on EXW, for FOB/CIF/CFR price, please contact sales@primesteeltube.com;
3. The above price is not including any packing and end processing charge, for detailed quotation, please contact sales@primesteeltube.com;
4. The above price is only valide during NOV 11-  18;
5. The applicapable MOQ for this price list is over 25 tons;

Difficulties in Wall Thickness Control for Straight Seam Steel Pipe Process

Straight seam steel pipe wall thickness control is a difficult production. At present, the straight seam steel pipe manufacturers to improve the wall thickness in the production of precision uses the methods generally including:

1, Tube heating
Heating to the average to prevent rapid up and down temperature. Each take-off and landing temperature is to maintain a smooth slow, the maximum rise and fall temperature does not exceed 30 ℃.
2, Rolling mill mandrel
Average wall thickness of thick wall tube and solid billet make the probability of mandrel bending deformation significantly reduced, can effectively improve the wall thickness of the precision.
3, The accuracy of mandrel
The outer core of the machining accuracy control in ± 0.1mm, mandrel straightness bias does not exceed 5mm. Welding, the two core rods between the piercing a finishing pin positioning, welding in order to avoid the formation of the total straightness bias is too large.
4, The perfect process
Determing whether the centering roll device in place, adjust the relevant core roller in the middle, open the angle and the size of the initiative of the same opening, the middle of the rolling core in the rolling line.
5, Centering roller
Perfect process is to avoid the center pull thin and wall thickness beyond the control limitations of the state of attack, improve wall thickness accuracy.
6, Perforated mandrel
General choice of perforated mandrel diameter Φ108mm-Φ114mm, wall thickness requirements ≥ 25mm and wall thickness of the average thick-walled tube.
7, Rolling the middle line
Making sure that the middle line of the piercing mill is consistent with the middle line of the piercing trolley to prevent "upper rolling" or "lower rolling", so that the billet sticks to the average force during the piercing.
8, Rolling things
On the wear of the head, guide, roll and other rolling things to be real-time change.
9, Rolling things device
Roller distance, the distance must be in the middle of the rolling line. Guaranteed the distance between the guide and the middle of the roller in the middle of the piercing rolling, the upper and lower roller equal to the left and right lead from the same.

Carbon Steel Alloy-ASTM A53

ASTM A53 is a carbon steel alloy,used as structural steel or for low-pressure plumbing.The alloy specifications are set by ASTM international,in specifications ASTM A53/A53M.
A53 pipe comes in three types and two grades,A53 Type F,which is longitudinally furnace butt welded or continuous welded（Grade A only）,A53 Type E，which is longitudinally electric resistance welded（Grades A and B），and A53 Type S,which is seamless pipe,produced by hot working,and possibly cold finishing,the steel（Grade A and B).ASTM A53 pipe is sized according to the nominal pipe size（NPS）system.It is commonly available with national pipe thread ends or with plain cut ends.It can be used for steam,water,and air conveyance.It is also weldable and can be used in structural application,although ASTM A500 tube,which is available in the same NPS
Sizes,is sometime preferred.
This is a standard set by the standards organization ASTM international,a voluntary standards development organizations that sets technical standards for materials,products,systems,and service.

Chinese Large Diameter Steel Pipe has Damaged the Canadian Domestic Industry

On Octber 20, 2016, the Canadian International Trade Court (CITT) has made the final decision on Chinese large diameter carbon steel pipe and alloy steel pipe. They announced that the Chinese large diameter steel pipe has damaged the Canadian domestic industry. According to the provisions of the Canadain side from October 20 on the above mentioned products, anti-dupmingduties and countervailing duties.