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It is generally believed that the non metallic inclusions in the steel pipe can destroy the continuity and compactness of the steel pipe, and the serious inclusions will lead to the emergence of the phenomenon of steel tube delamination. Another idea is hydrogen induced cracking, which is due to the formation of white spots in the circular tube, the formation of white spots in the circular tube, the formation of layer defects in the rolling process. In addition, the stress exceeds the plastic rotation of the two roller is not uniform deformation, can also lead to the strength of the layered. Control measures of internal layer of steel pipe: 1, improve the plastic toughness of steel tube Improving the cleanliness of molten steel, reduce harmful impurities; increase the proportion of the axis of the floor, reduce the central segregation and central porosity; the reasonable cooling system, avoid cracks in plate; billet rolling plate or offline slow cooling process, reduce internal stress, so as to ensure the organization performance and billet and finished products meet the technical standards. 2, reasonable control of heating temperature The best heating temperature is selected by measuring the thermo plastic curve. Also note that there is enough time to heat the heating pipe to reduce the plastic deformation resistance, improve the toughness. 3, reduce the roll speed Speed is a key parameter for the roll piercing process, in which the rolling speed changes from low to high, and there is a critical delamination starting to roll speed. At lower roll speeds, it is easy to form the lumen; the higher the roller speed, and the delamination defects of the capillary formation are easy to form. In order to eliminate the delamination defects and the capillary, the roll speed should be reduced to the critical delamination starting at the roll speed.

AMM’s Mexican Steel Forum 2017AMM’s 21st Mexican Steel ForumDate: 2/1/2017 – 2/2/2017Venue: InterContinental, Cancun, MexicoAMM’s 21st Mexican Steel Forum will be returning to Cancun for a third year in January 2016. The conference is a long-established date in the Mexican steel calendar for members of the steel industry from across North and Latin America and continues to provide a combination of insightful presentations and high quality networking opportunities. As the industry becomes more volatile in the face of the drastic changes to world steel dynamics over the last year it is more crucial than ever to keep up to date with the latest trends in Mexico, connect with clients, and make new contacts.  Event news: Website: http://www.amm.com/events/mexican-steel-forum/details.htmlVenuesInterContinental Presidente Cancun Resort HotelBlvd Kukulcan Km 7.5, Hotel Zone, Cancun 77500, Cancun Mexico Tel: +1-305-774 0040 http://www.presidentecancun.com/OrganizersAMM – American Metal Market EventsNestor House Playhouse Yard, London, EC4V 5EX, London United Kingdom Tel: +1-212-901 3828 http://www.amm.com/events

Pipeline Coating 2017Global conference on pipeline protection technology and marketsDate: 2/14/2017 – 2/16/2017Venue: Austria Trend Hotel Savoyen, Vienna, Austria The conference attracts hundreds of delegates from all over the world. Pipeline Coating 2017 provides a unique forum for the world’s leading pipeline contractors, operators, pipe mills and pipe coaters, engineers and specifiers, researchers, raw materials and machinery suppliers to debate the latest pipeline protection technology and worldwide industry trends.  Event news: Website: www.amiplastics.com/events/Future Dates:Pipeline Coating 20182018-2Vienna, AustriaVenuesAustria Trend Hotel SavoyenRennweg 16, 1030 Wien, Vienna Austria Tel: +43-1-206 33-0 www.austria-trend.at/Hotel-Savoyen-Vienna/en/OrganizersApplied Market Information Ltd.6 Pritchard Street, Bristol, BS2 8RH, Bristol United Kingdom Tel: +44-(0)117-924 9442 www.amiplastics.com/

Steel pipe concrete structure is a novel composite structure made of concrete filled steel tube formed. Because steel concrete structure to more effectively play two materials steel and concrete respective advantages, while overcoming the disadvantages of steel structures is prone to local buckling. Steel concrete structure in accordance with the section of the form can be pided into rectangular steel concrete structures, concrete structures and polygonal circular steel pipe and other concrete structures, including rectangular and circular steel pipe concrete structure concrete structure wider application.  As we all know, the concret has high compressive strength. But flexural capacity is weak, and steel, in particular, strong steel bending ability, with good plasticity, but when pressure is easy to lose axial compressive buckling capacity. The steel concrete in the structure can be combined with the advantages of both, can make concrete lateral pressure in the state, the compressive strength can be doubled. While the presence of the concrete to improve the rigidity of the pipe, the two function together, thus greatly improving the carrying capacity. As a new steel concrete composite structures, mainly in axial compression and a smaller force eccentric compression member-based, is widely used in the framework of the structure (such as factories and high-rise). The rapid development of steel concrete structure is due to its good mechanical performance and construction performance, manifested in the following aspects: 1. high capacity, good ductility, excellent seismic performance Concrete filled steel columns, steel restraints on its internal concrete in the concrete three-state pressure to improve the compressive strength of concrete; steel inside the concrete and steel can effectively prevent the occurrence of local buckling. Research shows that the bearing capacity of concrete filled steel tube column is higher than the corresponding steel and concrete Columns Columns sum. Interaction between steel and concrete steel inside the concrete so damaged by brittle failure into a plastic failure, significantly improved ductility components, energy dissipation capacity is greatly improved, with excellent seismic performance. 2. construction convenient, greatly shorten the construction period When the steel construction of concrete structures, steel skeleton can be used as fresh bear the weight of construction loads and structural construction phase, the construction is not affected by concrete curing time; due to the steel reinforcement inside the concrete is no easy pouring concrete and tamping; steel concrete structure construction, no template, saving formwork, form removal of material and labor costs, but also saves time. 3. in favor of fire-resistant steel and fire Because the pipe is filled with concrete, can absorb a lot of heat, so when subjected to fire string section of the temperature field distribution is very uneven, increasing the pillar of fire resistance time, heating rate slows steel columns, steel columns and once yielded concrete Most can withstand axial load, to prevent structural collapse. The fire resistance of composite beam will increase, because the temperature of the steel beam from the top flange of the heat will be transmitted to the concrete increases. 4. corrosion resistance than steel Pouring concrete steel pipe exposed area decreased by much less than the area of ​​the external gas corrosion of steel, corrosion and corrosion than steel cost savings. Cross-section in the form of steel concrete structures affect the mechanical properties of steel concrete structure, the degree of difficulty of construction, construction period and project cost has greatly. Circular steel circular pipe by means of concrete compression members bound by its effective role inside the concrete, the steel pipe inside the concrete in three-pressed state has a higher compressive strength of the concrete.

Reasons for the magnetic field of spiral steel pipe ​ In the welding process, welding by DC welding, in welding line, and the position of the welding head due to the high current, resulting in a strong magnetic field, pipe body under the action of magnetic field, magnetic moment or tend to obtain and external magnetic field in the same direction are arranged. When the welding end, magnetic field gradually decreased till disappeared, due to the hysteresis phenomenon, in the tube body and residual magnetic flux density, this is what we say normally remanence. The harm of spiral steel tube magnetic field Existent remanent magnetization, the image intensifier and the electron beam deflection and X-ray industrial TV image system produced the “s” type distortion, influence porosity, slag and other natural defects, especially the detection rate of incomplete penetration, cracks and other linear natural defects. With the change and improve X ray image intensifier TV system pipeline steel grade, the remanence was particularly prominent. Remanence existence, ring butt in the pipeline, will produce the phenomenon of partial arc, welding quality. Remanence have seriously affected the quality of construction The AC degaussing method of spiral pipe is the most common method: 1, with the coil around the outside of the steel tube, to the coil through the alternating current, slowly reduce the current of alternating current, until reduced to zero. Degaussing results: don’t change the physical properties of spiral steel pipe, however, once again encountered the external magnetic field, spiral steel tube also is magnetized. 2, through the heat treatment process, can be more thoroughly the degaussing, however, after degaussing, hardness and rigidity of the spiral pipe will change, encountered again in the future the external magnetic field, plus the magnetic field is removed, the steel pipe can basically there is no residual magnetism. 3, heat treatment process, is probably: oxygen free heating to a certain temperature, and then, with 72 hours slowly cooling to room temperature. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Pipes & Tubings Philippines Expo 2017Philippines Pipes & Tubings ExpoDate: 3/22/2017 – 3/24/2017Venue: SMX Convention Center, Manila, PhilippinesConcurrent Expo: Water Philippines 2017 – International Water & Wastewater Industry EventA dedicated platform for industry experts to showcase product such as Pipes, Tubings, Fittings and Corrosion Control! This event is intended to serve as a cross-border business bridge that can help both suppliers and users to acquire international market information, observe industrial trends and build distribution channels. Pipes & Tubings Philippines Expo is co-located with Water Philippines Expo, an opportunity to target visitors and industry players who wish to learn how to improve water and wastewater facilities and water preservation.  Event news: Website: http://www.waterphilippinesexpo.com/Future Dates:Pipes & Tubings Philippines Expo 20192019-3Manila, PhilippinesVenuesSMX Convention CenterSeashell Lane, Mall of Asia Complex, Pasay City, 1300, Manila Philippines Tel: +63-2-556.8888 http://www.smxconventioncenter.com/OrganizersUBM Malaysia – United Business Media (M) Sdn BhdA-8-1, Level 8, Hampshire Place Office 157 Hampshire, 1 Jalan Mayang Sari, Kuala Lumpur Malaysia Tel: +60-3-2176 8788 http://www.ubmmalaysia.com/

Metal & Steel Middle East 20178th international exhibition for steel, steel fabrication and metallurgy industryDate: 3/2/2017 – 3/4/2017Venue: Cairo International Convention & Exhibition Center, Cairo, EgyptConcurrent Expo: FABEX Middle East 2017 – 8th international exhibition for steel structures, tube and pipe, sheet metal, and metal formingMetal & Steel/ FABEX Middle East Exhibition, since its first edition, has established itself as a solid and reliable platform which caters to the requirement of the region’s booming steel industry. It provides and excellent opportunity for exhibitors to establish new links and increase their market share in the Middle East region.  Event news: Website: http://www.metalsteeleg.com/Future Dates:Metal & Steel Middle East 20182018-3Cairo, EgyptVenuesCairo International Conference Centre (CICC)Nasr Road, Nasr city, Cairo Egypt Tel: +20-2-22633222 http://www.eeca.gov.eg/OrganizersAGEX – Arabian German For Exhibitions & Publishing Ltd30 Mostafa Hamam st., Nasr City, Cairo Egypt Tel: +20-2-22629 682 http://www.arabiangerman.com/

AMM’s Steel Tube + Pipe Conference 2017AMM’s 10th Steel Tube + Pipe ConferenceDate: 3/8/2017 – 3/9/2017Venue: Doubletree Houston Greenway Plaza Hotel, Houston TX, United StatesAmerica’s largest gathering for the steel, tube and pipe industry welcomed 303 delegates from 167 companies back to Houston in March, 2017. Consistency and reliability; these are the two words our conference embodies. Though conditions have been tough for companies with exposure to the recent downtrend in oil prices, opportunities for growth never disappear.  Event news: Website: http://www.amm.com/events/event-calendar.htmlFuture Dates:AMM”s Steel Tube + Pipe Conference 20182018-3Houston TX, United StatesOrganizers

Steel Plate Conference Europe 20173rd Steel Plate Conference EuropeDate: 2017-3Venue: Dusseldorf, Dusseldorf, GermanyThe specialized meeting for Europe’s steel plate market insiders  Event news: Website: http://europesteelplate.com/OrganizersMetal Expert GroupNaberezhna Peremogy str. 48b, Dnipropetrovsk, 49094, Dnipropetrovsk Ukraine Tel: +38-056-375-79-12 http://metalexpert-group.com/

Global Iron Ore & Steel Forecast Conference 2017Annual Global Iron Ore & Steel Forecast Conference & ExhibitionDate: 3/29/2017 – 3/30/2017Venue: Crown Perth, Perth, AustraliaThe Annual Global Iron Ore & Steel Forecast Conference & Exhibition is renowned as the world’s largest gathering of senior iron ore and steel executives with thousands of industry personnel attending it over the years. It is recognised as the conference that delivers vital information on the status of the global iron ore and steel sectors. See which companies have attended in the past here.  Event news: Website: http://www.globalironore.com.au/Future Dates:Global Iron Ore & Steel Forecast Conference 20182018-3Perth, AustraliaVenuesCrown PerthGreat Eastern Highway, Burswood WA, Perth Australia Tel: +61-8-9362 7777 http://www.crownperth.com.au/Organizers Informa AustraliaLevel 18, 347 Kent Street, Sydney, NSW, 2000, Sydney Australia Tel: +61-2-9080 4300 http://www.informa.com.au/

In recent years, the worldwide high-end seamless steel pipe market recovery and the country’s economic strength gradually increased, the hot extrusion production process of seamless steel pipe ushered in a new round of development opportunities. Hot extruded steel pipe production process using hot extrusion method with three-stress deformation in the metal density is good, homogeneous, suitable for almost all varieties of steel production, particularly in the high-alloy steels difficult to deformation and various special-shaped production of the tube section has a special processing advantages. Hot extruded steel products because it has a performance advantage in the military, nuclear power, thermal power, aviation, mining, oil and petrochemical, and other key areas of the national economy and the high-end irreplaceable application prospects. Efforts to develop high-performance, high-tech and high value-added hot extruded steel pipe products, high-end steel pipe technology to promote national development and strengthening of comprehensive economic strength has far-reaching significance. Depending on technical requirements for products, hot extruded steel pipe after production using continuous production process, but also through rolling, straightening, shot blasting, degreasing, pickling processes to deal with. And the need to set up a multi-level defect detection, complete finishing facilities, the use of computer control and management, in order to ultimately effectively ensure a variety of products to meet the process requirements and the absolute strict product quality standards. Hot extrusion process meets stringent product standards, widely used in military, nuclear power, petrochemical, and other cutting-edge areas of aviation and a variety of stainless steel tubes, high-quality high-temperature corrosion steel pipe, steel pipe and other steel titanium and titanium alloy products. These high-quality, high-precision, difficult deformation of specialty steel products, its production processes often require special smelting, casting, rolling, forging production and R & D capabilities, and includes cold rolling, heat treatment process including a series of tube processing capacity. Core areas of hot piercing and hot extrusion production process need to build a complete production line, a broad product line includes: pretreatment tube offline, online pre-heating and heating tube, inner tube, the outer surface of the glass powder lubrication after heat perforation / reaming, after reheating and the inner and outer surfaces of the glass powder lubricant into the hot extrusion process and thermal pressure I saw after cutting, hot extruded steel tube (long tube by heat Sawing online after) by a roller transported to the background, and then heat quenched or cooled in the cooling bed.

Steel pipe weld cracks are often pided into two types of hot and cold cracks according to different mechanisms. It is produced by thermal cracking of liquids, the solid-state crystallization process in the weld metal, which is mainly produced in the weld metal. The main reason for its low melting point material exists in the weld, when subjected to high welding stress, which weakened the contact between the grains, easy to cause breakdown between the grains. Welding and welding rod containing S, Cu impurities such a long time, prone to thermal cracking. Distribution of Thermal Crack Characteristics along Grain Boundary. When the crack through the surface and the outside world, it is a clear tendency to hydrogenation. In the cooling process after welding cold cracks, mainly in the base metal or base metal and weld fusion line produced. The main reason is that, due to the weld heat affected zone formed or formed in the quenched structure, the alloy steel with the carbon content of the welding element is higher or harder is more likely to be cracked. Over-welding into hydrogen, may also lead to cold cracks. The most dangerous crack defects, in addition to reducing the cross-section than the bearings, but also in the crack at the serious stress concentration, in use will gradually expand, eventually leading to damage to components. Therefore, the presence of such defects, which normally do not allow for welded structures, is a shovel for re-welding. The lack of penetration of the internal defects of steel pipe is the lack of penetration of the workpiece and the weld metal or weld layer between the local incomplete fusion of defects. Incomplete penetration weld thinning of the workpiece section, resulting in severe stress concentration, greatly reduce the joint strength, often a source of weld cracks. Welding slag into the non-metallic slag, that is slag. Welding slag will reduce the working cross-section, resulting in stress concentration will reduce the welding strength and toughness. The porosity of the weld metal at high temperatures, the absorption due to the excessive gas or gas dissolving in the cell, is caused by the metallurgical reaction, the cooling and solidification occurs too late when the bath is discharged, and the welding hole forms a surface inside, hole. The presence of the holes reduces the effective work of the welding cross-section to reduce the mechanical strength of the joint. If there are through holes or continuity, it will seriously affect the tightness of the welding parts. In the welding cracking or welding, the metal in the weld in the local cracked area known as the crack. Cracks may occur in the weld, or both sides of the welding heat-affected zone. Sometimes occurs on the metal surface, the metal may be generated internally.