Order--Carbon Steel Pipe RHS to UAE

Product: Carbon Steel Pipe RHS

Standard: EN 10219

Specification: 600*350*20*12000       600*400*20*12000

Surface: W.T. Measurement

Ends: Bare pipe

Quantity: 1014.88 MT

Production Time: 30 days

Destination: UAE

Sales Expert: Spring Song

The Classification of Carbon Steel Pipe

The classification of carbon steel pipe includes multiple factors, such as production methods, cross-sectional shape, wall thickness and application. Next, Prime Steel Pipe will detailedly introduce the classification of carbon steel pipe for all of you.

Carbon steel pipe is classified by its production methods:

1. Seamless Steel Pipe - hot rolled seamless steel pipe, cold rolled seamless steel pipe, cold drawn seamless steel pipe.

2. Welded Steel Pipe - longitudinal welded pipe, spiral welded pipe, electric resistance welded pipe.

Carbon steel pipe is also classified by its cross-sectional shape. Its categories include:

1. Simple section steel pipe - round carbon steel pipe, square carbon steel pipe, rectangular carbon steel pipe, oval carbon steel pipe ect.

2. Complex section steel pipe - hexagonal carbon steel pipe with unequal edge, five plum shaped carbon steel pipe, double convex carbon stee pipe, double concave carbon steel pipe ect.

Carbon steel pipe is classified by its wall thickness:

1. Thin walled carbon steel pipe.

2. Thick walled carbon steel pipe.

Carbon steel pipe is classified by its application:

Carbon steel pipe can be used for thermal equipment, machinery industrial pipe, oil line pipe, geological drilling steel pipe, container steel pipe, chemical industry steel pipe, and other special purpose steel pipe.

The Use of ERW Steel Pipe

High frequency electric resistance welded pipe, also known as ERW steel pipe. ERW has many advantages, such as high production efficiency, low-cost, saving in material, and easy-to-automation. It is a kind of important welding technology which is widely used in various industrial sectors such as aviation, energy, electricity, automobile, light industry and so on.

ERW steel pipe uses hot rolled coil as raw material, its wall thickness is uniform and is controlled at ± 0.2mm or so, the two ends of the pipe should repair the end, bevel, and cut to length according to the United States APl standard or GB/T.1 standard. Compared with the submerged arc welding process, ERW welding process does not add any welding materials, weld molding has not been hot-melting state, the weld metal goes through the recrystallization process, so the formed weld is completely the same chemistry as the base metal. The steel pipe after welding will be annealing, manufacturing cold forming internal stress, welding internal stress are improved, so ERW steel pipe comprehensive mechanical properties better.

ERW steel pipe is mainly used for conveying oil, gas and other vapor-liquid objects, to meet the high and low pressure requirements. At present, the field of transportation and transportation in the world plays a heavy role. In recent years, the engineering gas has been widely used ERW steel pipe as the main gas pipe network.

About more details about definition, manufacturing process and application of ERW steel pipe, you can click the hyper-link to know. If you have any requirements of carbon steel pipe or steel pipe fittings, Prime Steel Pipe will give you the most complete solution.

How to Ensure the Quality of High Frequency Welded Pipe in the Process of Production?

In the high frequency welding process of production, in order to ensure that the product quality of the high frequency welded pipe meets the requirements of the technical standards and the needs of the customers , we need to analyze the factors that affect the product quality in the steel pipe production process.

Through a month of nonconforming product statistics of Φ76mm high frequency welded steel pipe unit, We believe that the factors that affect the quality of steel pipe products in the production process include raw materials, welding technology, roll adjustment, roll material, equipment failure, production environment and other reasons, etc. Among them, raw materials, welding technology, roll adjustment are key links, 32.44%, 24.85% and 22.72% respectively, the sum of the three links accounted for 80.01%. And the other four elements of the impact on the quality of steel products accounted for 19.99%, are relatively minor links, including roll material, equipment failure, production environment and other reasons. Therefore, in the high frequency welding process of production, the raw materials, welding technology and roll adjustment three links should be controlled carefully.

Effects of raw material on welding quality of carbon steel pipe

Factors affecting the quality of raw materials mainly include three aspects, the unstable mechanical properties of the steel strip, the surface defects of the strip and the large deviation of geometric size. Therefore, tube manufacturers should control from these three aspects.

Effects of high frequency welding on quality of carbon steel pipe

In the process of high frequency welding of steel pipe, welding technology and the control of process parameters, the position of the sensor and resistor,etc., have a great influence on the weld pipe weld quality.

Effects of roll adjustment on quality of carbon steel pipe

From the steel pipe scrap causal analysis diagram, we can get roll adjustment is the operation of the steel pipe.In the production process, when the roll is damaged or abrasive badly ad, we need to replace part of the roll on the unit, or we need to replace the whole roll when the number of a product is enough after continuous production. Tube manufacturers should adjust the roll to obtain a good quality of the pipe.If the roll adjustment is not good, easy to cause the tube seam torsion, welding of steel pipe, lap welding, edge waves, drums and body surface indentation or scratches, big ovality of steel pipe and other defects, so the roll should be grasped roll adjustment skill. So the worker should master the roll adjustment technique when changing the roll.

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.

2017 iron and steel industry is still in transition stage, the steel price is difficult to rise

China steel industry association recently reported, in 2017, China's steel demand is expected to remain stable, but the Shinestar of iron and steel institute considered think, due to the increasingly complex market environment at home and abroad, the steel industry is in a stage of transition to erase, not big changes in the overall market, steel prices to rise sharply. 

As Angle steel, galvanized Angle steel, channel steel, galvanized channel steel, metal steel board, open the tablet, and other products production services, Shinestar group have been very concerned about China's steel prices. In 2016, steel prices rose sharply, the iron and steel industry so reverse the depth of loss, profit. The first 11 months of the industry total profit of 33.15 billion yuan, and compared with the loss of 52.9 billion yuan.

Back in 2016, the Shinestar of iron and steel institute considered think, push factors of rising steel prices, the first is to continuous supply power limiting capacity policy; Second, real estate, automotive industry needs the strong recovery from improved more than expected; Three is a loose money provide ample liquidity to markets; Four is the coal 276 working days policy and the high grade iron ore resources nervous cause to rising raw material prices increase the cost driver. In 2017, the production capacity to the above factors, in addition to policy continues to strengthen, the other three factors will be significantly weaker. And iron and steel production capacity to strength will be bigger, at the same time, with the real estate enter the downward cycle, real estate development, automobile electrical appliances commodities, such as consumer goods growth is expected to also will fall. Based on this, in 2017 the domestic hong kong-listed is expected to double weak in supply and demand situation, the push of iron and steel production capacity to supply side and demand side real estate regulation and control of overweight, or will become the main affect domestic steel prices to logic.

Shinestar of iron and steel research institute said,in the face of the market in 2017, are full of confidence, also want to clearly recognize that although the steel industry has realized the profit, but it is only out of the trough, is not completely out of the woods, the industry is still in the small profit operation, still faces many difficulties and problems, not blindly.

In front of the 2017 has arrived, Shinestar group will keep optimistic attitude, we will continue to do yourself, constantly to develop more high quality of Angle steel, galvanized Angle steel, channel steel, galvanized channel steel, metal steel board, open the tablet, and Carbon steel pipe manufacturer, further to meet customer demand.

Low Carbon Steel Pipe Manufacturer

Low Carbon Steel Pipe Manufacturer

Low carbon steel pipe manufacturer is one type of carbon steel pipe with the carbon content less than 0.25%. It is also known as mild steel pipe due to its low strength and low hardness. Low carbon steel pipe includes most of the ordinary carbon structural steel pipe and part of the high quality cabron structural steel pipe. Most of low carbon steel pipe without heat treatment is applied for structural engineering, and some of low carbon steel pipe with heat treatment and carburizing is applied for wear-resistant mechnical parts.

Since low carbon steel pipe has a very low carbon content and poor machinability, normalizing treatment can improves its machinability. 

The annealing organizations for low carbon steel pipe is the ferrite and a small amount of pearlite which creates low strength, low hardness, good plasticity and toughness. Therefore, low carbon steel pipe has good cold formability, it can be cold formed by curling, bending, stamping and other methods. Besides, it also has good weldability. The carbon content is from 0.10% to .030% which is easy to accept a variety of processing such as forging, welding and cutting. Commonly it is used in the manufacturer of chains, rivets, bolts, shaft and so on.

How to Choose the SSAW Carbon Steel Pipe Manufacturer

How to Choose the SSAW Carbon Steel Pipe Manufacturer

Usage of SSAW carbon steel pipe is relatively high, the application is very wide, it should be how to choose before in the selection to pay attention to quality.

The first method is a more professional detection method, that is, by the strength of the pressure vessel to be detected. Commonly, we use atmospheric pressure and water pressure to detect, in this way can detect the working conditions of the SSAW carbon steel pipe in the pressure working environment, but also to detect the tightness of the spiral steel pipe, generally take the atmospheric pressure detection, because such security Relatively high, and if the water vapor pressure through the test, then the need to remove the spiral pipe after the water, too much trouble.

The second method is also relatively simple, that is, through the surface of observation. With the naked eye found in the spiral steel pipe in the welding and size of the problem, if necessary, you can also use the standard sample and the products to be compared to find the problem. In general, formal steel pipe company in the production is relatively perfect, on the other hand to beat the metal pipe, if the sound is very crisp and the echo is not very dirty, then the name is the latest selection of steel pipe, rather than scrap steel recycling.

These two methods are commonly used, we can choose a way to test, more secure way is the best to the regular manufacturers, can reduce the use of the process of abuse.

Carbon Steel Pipe Production

Carbon steel pipe can be divided into seamless steel pipe, straight seam steel pipe, spiral steel pipe, high-frequency welded steel pipe. Rolled seamless carbon steel pipe is the raw material of round tube, tube embryo to be cut through the cutting machine into a length of about 1 m of blank, and the conveyor belt to the furnace heating. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of the cone drill bit into the steel embryo drilling, the formation of steel pipe. The inner diameter of the pipe is determined by the outside diameter of the sizing bit. Steel pipe after sizing, into the cooling tower, through the water cooling, the cooling pipe, it is necessary to be straightened. After straightening by the steel pipe sent to the metal detector (or water pressure test) for internal testing. If the pipe has cracks, bubbles and other problems, will be detected. After the quality of steel pipe but also through rigorous manual selection. After the quality inspection of steel pipe, spray paint with the number, size, production lot number. And suspended by the crane into the warehouse.

Cold drawn (rolled) carbon steel seamless steel pipe: round tube → heating → punching → start → annealing → pickling → oiling (copper) → multi-pass cold drawing (cold rolling) → tube → heat treatment → straightening → water pressure test (testing) → marking → storage

Carbon steel seamless steel pipe because of its manufacturing process is different, is divided into hot-rolled (extrusion) seamless steel tubes and cold drawn (rolled) seamless steel pipe two. Cold drawn (rolled) tube is divided into two kinds of round tube and special-shaped tube.

In addition, GB / T17396-1998 (hot-rolled seamless steel pipe for hydraulic support), GB3093-1986 (diesel engine high-pressure seamless steel pipe), GB / T3639-1983 (cold drawn or cold-rolled precision seamless steel pipe), GB / T3094-1986 (cold drawn seamless steel pipe shaped steel pipe), GB / T8713-1988 (hydraulic and pneumatic cylinder with precision diameter seamless steel pipe), GB13296-1991 (boiler, heat exchanger with stainless steel seamless pipe), GB / T14975 (Seamless Steel Tube for Automotive Axle Bushings), API SPEC5CT-1999 (Casing and Tubing), GB / T14976-1994 (Seamless Steel Pipe for Fluid Conveying) Specification) and so on.

carbon steel pipe manufacturing

carbon steel pipe manufacturing

The raw material of carbon steel pipe is round pipe billet. The round pipe billet is cut by the cutting machine and processed into the billet with the length of 1 meter. And then sent to th furnace tobe heated by the conveyer belt. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of the cone drill bit into the steel embryo drilling, the formation of steel pipe. The inner diameter of the pipe is determined by the outside diameter of the sizing bit. Steel pipe after sizing, into the cooling tower, through the water cooling, the cooling pipe, it is necessary to be straightened. After straightening by the steel pipe sent to the metal detector (or water pressure test) for internal testing. If the pipe has cracks, bubbles and other problems, will be detected. After the quality of steel pipe but also through rigorous manual selection. After the quality inspection of steel pipe, spray paint with the number, size, production lot number. And suspended by the crane into the warehouse.

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.

SAE/AMS Specifications Sheet

SAE/AMS Specifications Sheet

SAE-J356 Welded Flash Controlled Low Carbon Steel Tubing Normalized for Bending. Double Flaring and Beading.
Covers normalized electric resistance welded tube ID flash-controlled .005" to .010" manipulative quality.
SAE-J524 Seamless Low Carbon Steel Tubing Annealed for Bending and Flaring.
Covers cold drawn seamless JIC hydraulic line tubing.
SAE-J525 Welded and Drawn Low Carbon Steel Tubing Annealed for Bending and Flaring.
Covers welded and drawn JIC hydraulic line tubing.
SAE-J526 Welded Low Carbon Steel Tubing.
Covers annealed welded tube with ID flash-in for general automotive applications.
SAE-J527 Brazed Double Wall Carbon Steel Tubing.
Covers copper brazed double wall low carbon steel tube intended for general automotive applications and other similar uses. Suitable for bending, forming and double flaring.
SAE-J529 Fuel Injection Tubing.
Covers low carbon steel tube specially manufactured for high pressure fuel injection lines for diesel engines.
AMS-5050 Seamless Annealed Low Carbon Steel Tube.
Covers cold drawn seamless JIC hydraulic line steel tubing for aircraft applications.
AMS-5062 Seamless Low Carbon Steel Tube.
Covers cold finished or hot finished seamless low carbon mechanical steel tube.
AMS-6360 Seamless SAE 4130 Alloy Steel Tubing.
Covers aircraft quality 4130 tube in condition N temper. Similar to MIL-T-6736 specification.
AMS-6365 Seamless SAE 4135 Alloy Steel Tubing.
Covers aircraft quality 4135 tube in condition N temper. Similar to MIL-T-6735 specification.
AMS-6371 Seamless SAE 4130 Alloy Steel Mechanical Tubing.
Covers electric furnace grade magnaflux quality 4130 aircraft tube, either hot finished or cold finished, hardenable.
AMS-6372 Seamless SAE 4135 Alloy Steel Mechanical Tubing.
Covers electric furnace grade magnaflux quality 4135 aircraft tube, either hot finished or cold finished, hardenable.
AMS-6381 Seamless SAE 4140 Alloy Steel Mechanical Tubing.
Covers electric furnace grade magnaflux quality 4140 aircraft tube, either hot finished or cold finished, hardenable.
AMS-6415 Seamless SAF 4340 Alloy Steel Mechanical Tubing.
Covers electric furnace grade magnaflux quality 4340 aircraft tube, either hot finished or cold finished, hardenable.

Petro China and Malaysia has sighed Sabah Natural Gas Pipeline Project

On the afternoon of November 1, 2016, under the witness of Premier Li Keqiang and Malaysian Prime Mnister Najib Razak, The deputy general manageer of China National Petroleum Corporation (CNPC) Liu Hongbin and the Chairman of Strategic Energy Co., Ltd of Sulia Mohammad Evan Seriga Abu, on behalf of the two companies, have dual signed the Contract for the Construction and Trail Operation of Sabah Gas Pipeline Project and the Contract for Construction and Commissioning of Multu-medium Pipeline Project in Beijing.

Sabah gas pipeline and multi-media pipeline is the Malaysian federal government-led projects. Under the agreement, China Petroleum Pipeline Bureau will EPCC way to undertake the construction of these two pipeline projects.

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.

Usage of Steel Pipe

Transport and Service: Heavy traffic can put high amounts of pressure on roadway foundations, but the high tensile strength of carbon pipe, in addition to its elasticity and its ductility, allow it to be used safely in transport and service projects. Carbon pipe distributors know the product works well for water mains under roadways because it’s highly resistant to shock and vibration. It also tends to react more evenly when put under various degrees of fluctuating water pressure. Additionally, it can be made much thinner than pipes made from other materials. This means that it has a greater carrying capacity. Plus, it’s cheaper than copper, and the durability of carbon pipe helps decrease costs needed for repairs or replacement.

Building Homes: Carbon pipe is safe and durable. It does not need to be treated with preservatives, pesticides or glue, so it can be safer to handle when working on a home project. It’s also non-combustible, so it’s a good option for fire mitigation, and it won’t rot like some other pipes–making it resistant to common (and costly) household pests like termites. Additionally, it is a good choice in homes because it has a higher resistance to natural disasters like tornados, lightning, earthquakes and hurricanes.

Green Projects: Using carbon steel pipes makes sense for a lot of projects, but it’s also a great choice for the earth, because steel can be recycled–and it can be recycled over and over without losing any strength. The process of producing steel has also gone green, with almost half the world’s steel being produced in electric plants that use recycled scraps and generate no CO2 emissions.

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.

China’s Carbon Steel Plate Futures Prices Increase

The Chinese steelmaker Baosteel Group announced its domestic carbon steel plate futures prices for September, based on the August prices, up RMB100/ton.

The prices for hot rolled steel plate will be increased by RMB100/ton, but cancelled preferential prices of RMB50/ton; those for cold rolled and galvanized steel will ve also increased RMB100/ton.

The Difference between Black Pipes and Carbon Pipes

What is the black pipe?

Black steel pipe is made of steel that had not been galvanized, Its name comes from the scaly, dark-colored iron oxide coating on its surface, It's used in applications that don't require galvanized steel.

What is carbon steel pipe?

Steel whose characteristics are determined by the amount of carbon it contains. And steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, niobium, molybdenum, nickel, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60.

Most the steel produced in the world falls into the category of carbon steel.

3. Difference between black pipes and carbon pipes

In general "black" steel pipe and carbon steel pipe have about the same procedures for welding. That is if you are talking about general welding and not for some specific application like very cold temperatures. Black steel pipe is not really a specification but rather a generic term used primarily by plumbers to distinguish regular steel pipe from galvanized steel pipe. Most black steel pipe has a composition similar to ASTM A-53 pipe. The difference between A-53 and common steel pipe like A-106 are so close that some pipe is actually marked to meet both specifications. Black pipe and A 53 can be seamless or welded seam while A 106 is seamless.

How to Clean a Steel Pipe

Cleaning the inside of the steel pipe

Run after through the inside of the pipe. This can be done in a sink if the pipes is small enough. Use a water hose outside if the pipe is too big to fit in the sink. Tilt and twist the pipe. While the water is running, tilt it so the water run against the inside of the pipe. Twist the pipe so the water cleans off the sides of the pope, use a scrub brush saturated with soapy water to scrub the inside of the pope. If the pipe is too narrow to fit your hand though, use a baby bottle brush to clean the inside, Rinse the pipe with clean water and allow to dry. 

Cleaning the outside of the steel pipe

Saturate a soft cloth with distilled white vinegar and wipe the outside of the pipe with the cloth. Rinse the outside of the pipe with warm soapy water. Soak paper towels in baby oil and clean the outside of the pipe with them.  The baby oil will make the pipe shine like new. Spray a water displacing formula onto a cloth and wipe the pipe down. The water displacing formula will not only clean the pipe, but it will also in protecting the pipe from future marks.

Polishing the steel pipe

Apply a small amount of metal polish to a microfiber rag. Rub the microfiber rag gently across the surface of the pipe to distribute the polish evenly. Make sure the polish does not get too much thick on the pipe. Rub the surface of the pipe gently with a clean microfiber cloth to work off any excess polish. Buff the surface of the pipe and allow to dry.

Magnetic of Carbon Steel Pipe

Residual magnetism causes and impact on quality of welding 

When the gas pipeline construction and repair welding operations, sometimes magnetic blow phenomena affect the welding process. Forming a magnetic blow is the result of the presence of residual magnetism in the pipe metal. Typically, the magnetic induction and magnetic remanence divided into two processes. Magnetic induction in plants often produce tube links, such as: metal smelting, using electromagnetic crane for loading and unloading, pipe parked or garaged in a strong magnetic field, the magnetization is completed nondestructive inspection method, the pipe is placed close to power lines and so strong. Processes often produce magnetic welding operations during the assembly and the use of a magnetic holder, fixture and took DC welding pipes, such as: prolonged contact is connected to a DC power supply electric wire, bare wire segment or short-circuit pipe welding clamp and so on. 
When welding with magnetic steel, often difficult to see the arc ignition, combustion undermine the stability of the arc, the arc of the deviation, the liquid metal and slag melt the spill from the weld pool in a magnetic field. In order to stabilize the welding process and improve the quality of the welded joint, the steel is magnetized to demagnetized before welding. It should be noted, to be welded steel pipe is difficult to achieve full demagnetization. Therefore, when the remanence is insufficient to affect the quality of welding, it allows welding. 

Magnetic elimination of carbon steel pipe process 

1 to determine the size and direction of the pipe left field; 
2 Select the degaussing method, system diagrams and technical means; 
3 butt welded steel pipe or at the degaussing degaussing with the selected method; 
4 After checking the amount of residual magnetism after degaussing, to see if it meets the requirements.