On June 20, 2018, the U.S. Department of Commerce announced the initial subsidy of large-diameter Welded Pipes imported from China, India, South Korea, and Turkey.

1. The above price is based on BARE PIPE, for extra coating, please contact sales@united.com; 2. The above price is based on EXW, for FOB/CIF/CFR price, please contact sales@sales@united.com; 3. The above price is NOT including any packing and end processing charge; 4. The above price is only valide during June 21 - June 28; 5. The applicapable MOQ for this price list is over 25 tons;

1.1 this specification covers thermoforming welding and seamless carbon steel square, circular, rectangular or special shaped structure tubes for bridge and building welding, riveting or bolt connection and general structural use. 1.2 square and rectangular pipes are from 1 to 10 inches (25.4 to 254 millimeters), and the plane wall thickness is 0.095 to 1000 inches (2.41 to 25.40 mm), depending on the size. The circular pipe is provided, including the nominal (average) wall thickness of 0.109 to 1 inches (2.77 to 25.40 milli meters), and the size depends on the size. As long as this pipe meets all other requirements of this specification, it can provide other sizes of pipes. 1.3 pipes can be equipped with hot dip galvanized coating. 1.4 the value expressed in inch pound units should be used as a standard. Note in this standard, the dimensionless indicator NPS (nominal diameter) has been replaced by the traditional term "nominal diameter", "size" and "nominal size".

ASTM A572-50 is a high-strength, low-alloy (HSLA) columbium-vanadium steel. It has a higher yield and tensile strength, as compared to ASTM A36. The higher tensile strength of A572-50 allows reduction of section thickness and weight when manufacturing parts, therefore lowering the overall weight of the part. It is easy to weld, form, and machine when using appropriate techniques. ASTM A572 is also available in grades 42, 55, 60 and 65.

Masteel UK Ltd are a global steel supply and stockholding company, supplying the engineering, power generation, petrochemical, oil & gas and nuclear industries. Partne

Product Discription： Usage: Used for low pressure liquid transportation, such as water, gas, and oil. Oil drilling and machinery manufacturing, etc. ERW : Electric Resistance Welded pipe HFI: High Frequency Induction weld pipe EFW: Electric Fusion Welded Pipe Standard: API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387 Certificate: API 5L PSL1/ PSL2, API 5CT Out Diameter: 21.3mm -- 660.4mm(1/2"--26") Wall Thickness: 1.5 - 22.2mm Length: 0.3 – 18 M Steel Grade: API 5L : GR B, X42, X46, X56, X60, X65, X70 API 5CT: K55, J55, N80 P110 ASTM A53: GR A, GR B EN: S275, S275JR, S355JRH, S355J2H GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555 Surface: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test. Mill Test Certificate: EN 10204/3.1B

Seamless tubes are widely used in nuclear devices, natural gas, petrochemical, shipbuilding, boilers and other industries. Seamless steel tubes account for 65% of the market share in China's boiler industry. The main customers of the international market: Alstom, Becket, Siemens Austria, Petrobras, Doosan Heavy Industries, Hyundai, Ethel, Bell and so on.

We use a strict quality monitoring system to test the raw materials in the production process and test each product to ensure that each pipe meets the standard requirements and fully meets the requirements in the factory.

Internationally, the requirements for casing threads between one pair of inner and outer cones meet the requirement of end face allowance only, and the axial displacement can be used to complete the interference of the connection surface. And it can be used to improve the processing quality of the connection area, increase the axial force to increase the pressure of touch area and touch area, and then get a more compact ring pressure touch area. The larger the touch area, the less likely the leakage path is, and the more reliable the sealing function is. Casing thread is a special conical seal with thread grooves and taper pipe threads.

In order to maintain a stable heat treatment product during the induction heat rapid heat treatment process, the following measures should be taken on the production line:

The pressure of the API 5CT oil casing in the oil well: to ensure that the casing enters the well continuously, without cracks or deformation, the casing is required to have a certain strength to resist the external force it receives. Therefore, it is necessary to analyze the stress on the casing of the inner well.

Casing is the high end product of steel pipe production. There are many kinds of bushings. There are 15 kinds of casing diameters. The diameter range of 114.3-508mm steel; divided into J55, K55, N80, L-80, P-110, C-90, C-95, T-95 and other 11 kinds of casing; end buckle type and many types of requirements, processing button type STC, LC, BC, VAM, buckle type. The process of casing production and installation involves many tests. The main points are as follows:

The seamless tube used for heat exchanger is one of the components of the heat exchanger, and is placed in the cylinder for exchanging heat between the two media. It has high thermal conductivity and good isothermal properties. It is a device that can quickly transfer heat from one point to another, with little heat loss, so it is called a heat transfer superconductor, which has a thermal conductivity of several thousand times copper.

Foreign overseas platform material number S355G2 + N, S355G3 + N, S355G5 + M, S355G6 + M, S355G7 + M, S355G7 + N.

1) roller: it is the main transmission deformation tool. Usually, the roller consists of an inlet cone, a rolling belt (also called a compression belt) and an outlet cone. Its function: One. Injection cone: enter the tube blank and realize the perforation of the tube. The outlet cone of the bay is designed to reduce the hair wall, smooth the surface of the capillary, uniform the thickness of the capillary wall and complete the capillary backflow. C. Rolling belt: transition from inlet cone to outlet cone.

In the hydraulic test of the ERW pipe, it is often found that the rupture opening is broken off from the weld line of the ERW pipe, which indicates that the strength of the welded part is lower than that of the base metal. Through the experimental analysis, it is found that the thickness of the sample in the weld is reduced if the internal scratching groove is formed on the inner surface of the steel pipe during the removal of the burr in the weld. In tensile tests, samples are easily broken from this point.

Requirements for API 5L X52 seamless tube in standard 1. there are no cracks, wrinkles, wrinkles, spalling, crusts and scales on the inside and outside surfaces of the steel pipes. These defects should be completely eliminated. The grinding of surface defects should be smooth and smooth. The depth of clearance should not exceed the negative deviation of nominal wall thickness. The actual thickness of the defect removal zone should not be less than the minimum allowable wall thickness of the steel tube. The welding method should not be used.

There may be hundreds of different ways of packing pipes, most of which have advantages, but there are two principles that are critical to any method of preventing the safety of rust and maritime transport.

According to the need to cut the length of the pipeline. The cutting tool has a grinding wheel cutting machine (also known as toothless saw), hand saws, cutters and other hand tools. The grinding wheel cutting machine: suitable for cutting metal pipe or metal material, especially batch cutting is the most economical. You need to determine the needs of pipe cutting length, and then draw the cutting line. Cutting fixture before the pipe cutting machine should be firmly fixed. The machine starts slowly, press the wheel, don't slam or slam on the wheel pressure is too large, so as not to burst accident.

It is necessary to connect pipes together or change the direction of existing pipelines. Depending on the fluid or gas transported, pipes and piping joints are made of various materials. Most pipe fittings tend to thread or slide through the pipes they connect. Whether you are using a PVC pipe, chemical solvents are needed to form a seal between pipes and pipes. Measure the required length of the pipe to be installed, and remember the extra length required to insert the pipe into the fittings. Mark this length on the pipe.

The cracks of pipeline weld often follow different mechanisms, which can be divided into two types: hot cracking and cold cracking. It is produced by the thermal cracking of molten metal into solid crystallization, which is mainly produced in weld metal. The main reason for the low melting point material is that it exists in the weld, which weakens the contact between the grains when the high welding stress is accepted, and it is easy to lead to the breakdown between the grains. Hot spots are easy to occur when electrodes and electrodes contain impurities such as S and Cu for a long time.