Seamless pipe quality requirements 1, chemical composition In order to improve the chemical composition of the steel and the uniformity of the purity of the steel, reduce the non-metallic inclusions in the pipe and improve the distribution status, it is often used to increase the chemical composition of steel, such as tin, lead and lead. ". Equipment, even the use of electroslag furnace furnace remelting refining.

The quality control of Longitudinal welded pipe is to safely carry out production operations and is also an indispensable element for protecting the personal safety of operators. The main application areas are: large-span grid engineering, construction steel structure engineering, power and EHV transmission and transformation projects, mechanical engineering, bridges, bridges, stations, airports, stadium steel structure engineering, municipal pipe network, foundation piling, water gas pipelines , highway construction and other ancillary facilities.

2. The above price is based on EXW, for FOB/CIF/CFR price, please contact info@united-steel.com; 3. The above price is NOT including any packing and end processing charge; 4. The above price is only valide during March 9 - March 16 ; 5. The applicapable MOQ for this price list is over 25 tons;

The Wall Street Journal reported in a report on the 16 day of the Wall Street. Peter, director of the White House National Trade Commission, is closely related to the interests of the US iron and steel industry. He has instructed the Steel Corp to provide funds for filming documentary supporting his political views.

Seamlesstandard way of seamless steel pipe: 1. Wiring harness 2. Steel tape bundle Three steel tape ruled tapaten There is also an upgrade package: both ends of the tube (bundle) wrapped in PE film or film and tapaten. Seamless precision tube packaging

In order to detect transverse or longitudinal LSAW longitudinal joint welding flaws, ultrasonic testing is performed by a jet (water column) coupling. Ultrasonic flaw detection (water column) Ultrasonic flaw detection is a method in which the longitudinal beam transmitted between the probe and the pipe through the jet coupling probe enters the steel pipe through the water or steel interface, and is detected by the pure transverse wave of the weld of the waveform conversion pipe.

Post-weld heat treatment is a new process that eliminates residual stresses. Preheat the material to the post-weld heat treatment temperature, continue to maintain the heating temperature of the workpiece before welding, after insulation is completed, slowly cool it with insulation wool. The method can effectively reduce the welding residual stress and improve the stress corrosion resistance of the metal.

Seamless precision steel pipe is used in hydraulic & pneumatic cylinder ,automobile and other mechanical device .Feature: high precision and high brightness, the inner and outer surface of the tubes have high cleanness without oxid, mechanical properties of the final tubes also come out excellent, promising no leakage under high pressure, no deformation after cold-bent and no cracks when flaring and flattening, ensuring the efficient operation in all service.

DMH UNITED STEEL INDUSTRY CO.,LTD will show you "seamless steel pipe manufacturing process", and you will learn more about seamless pipes. Hot-rolled (extrusion seamless steel pipe): round tube perforation → heating → three-roll rolling, rolling or extrusion → detached → sizing (or reducing) → cooling → straightening → hydrostatic test (or testing) → mark → storage.

Large-diameter seamless steel pipe are those with an outer diameter exceeding 100 mm, wall thickness greater than 0.2, and the outer diameter of a pipe, and large-diameter seamless steel pipes are pierced with steel ingots or solid pipes, and then hot-rolled, cold-rolled, or cold dialed.

Steel imports in Latin America rose in 2017 and exports increased at the same time, according to the BNAmericas website.

According to UPI UPI website reported on February 18th, according to the survey report released 232 measures of steel and aluminum products and intends to take the South Korean President Wen zaiyin said on that day, the US trade protectionism measures firmly and resolutely deal with, or beauty related measures to resort to WTO, at the same time to assess whether the violation of the Korea US FTA this agreement, such problems in amending the bilateral trade agreement negotiations.

Hot-rolled seamless steel tubes are one of the important processes in production. Reasonable development of their process schemes directly affects the dimensional accuracy and quality of the surface after steel tube rolling. Unreasonable process schemes can cause defects such as folds, cracks, and concaves on the inner surface of the steel pipe.

The biggest difference between resistance welding (ERW) steel tubes and seamless steel tubes is that ERW, if welded, is the key to the quality of ERW steel tubes. The modern ERW steel pipe production process and equipment have made the ERW steel pipe a satisfactory solution for the international community, especially the unremitting efforts of the United States and other years. This is ERW welded seamless steel tube is divided into geometric seamless and physical seamless. Geometric seams eliminate internal and external failures. Due to the structure and tools of the internal burr removal system,.

In the process of high-frequency welding of steel pipes, the control of the welding process and process parameters, the position of the induction coil and the location of the resistance have a great influence on the welding quality of the steel pipe welding.

In the process of high-frequency welding of steel pipes, the control of the welding process and process parameters, the position of the induction coil and the location of the resistance have a great influence on the welding quality of the steel pipe welding.

In the process of high-frequency welding of steel pipes, the control of the welding process and process parameters, the position of the induction coil and the location of the resistance have a great influence on the welding quality of the steel pipe welding.

The biggest difference between resistance welding (ERW) steel tubes and seamless steel tubes is that ERW, if welded, is the key to the quality of ERW steel tubes. The modern ERW steel pipe production process and equipment have made the ERW steel pipe a satisfactory solution for the international community, especially the unremitting efforts of the United States and other years.

According to Indonesia, "Jakarta post" reported on February 8th, the Indonesian iron and Steel Association released data show that in 2017 Indonesia imported 6 million 430 thousand tons of steel, accounting for 48% of the total annual steel consumption in 2015 and 2016, respectively; Indonesia imported steel 6 million 850 thousand tons and 6 million 490 thousand tons, is the world's five largest importer of iron and steel.

According to researchers, this dense wood can block bullets. In this study, stainless steel balls fired by air guns easily penetrated ordinary wood but did not penetrate the same thickness of treated wood. The team said that this technology may bring a new kind of strong, lightweight wood material. This material can be used to replace steel in construction, to make lighter and better performing vehicles, and even to make bulletproof armor.

Before the European Commission negotiated details of the trade retaliatory measures against the United States, a detailed list of retaliatory tariffs has already been placed on the table of Chairman Juncker. The total amount of this list is close to 2.8 billion euros, and the EU has set a 25% tax rate for retaliation. These include T-shirts, jeans, cosmetics, motorcycles, yachts and other consumer goods worth about EUR 1 billion; agricultural products worth about 951 million euros, such as orange juice, bourbon and corn; and steel and other industrial products worth about 854 million euros. .